Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc,pci,virtio: fixes, cleanups

Lots of fixes, cleanups.
CPU hot-unplug improvements.
A new AER property for virtio devices, adding a dummy AER capability.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Wed 09 Dec 2020 18:04:28 GMT
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream: (65 commits)
  hw/virtio-pci Added AER capability.
  hw/virtio-pci Added counter for pcie capabilities offsets.
  pcie_aer: Fix help message of pcie_aer_inject_error command
  x86: ich9: let firmware negotiate 'CPU hot-unplug with SMI' feature
  x86: ich9: factor out "guest_cpu_hotplug_features"
  tests/acpi: update expected files
  x86: acpi: let the firmware handle pending "CPU remove" events in SMM
  tests/acpi: allow expected files change
  x86: acpi: introduce AcpiPmInfo::smi_on_cpu_unplug
  acpi: cpuhp: introduce 'firmware performs eject' status/control bits
  hw/i386/pc: add max combined fw size as machine configuration option
  block/export: avoid g_return_val_if() input validation
  contrib/vhost-user-input: avoid g_return_val_if() input validation
  contrib/vhost-user-gpu: avoid g_return_val_if() input validation
  contrib/vhost-user-blk: avoid g_return_val_if() input validation
  .gitlab-ci: add build-libvhost-user
  libvhost-user: add a simple link test without glib
  libvhost-user: make it a meson subproject
  libvhost-user: drop qemu/osdep.h dependency
  libvhost-user: remove qemu/compiler.h usage
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

90 files changed, 1286 insertions, 848 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 873ed19..98bff03 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -535,6 +535,17 @@ check-dco:
   variables:
     GIT_DEPTH: 1000
 
+build-libvhost-user:
+  stage: build
+  image: $CI_REGISTRY_IMAGE/qemu/fedora:latest
+  before_script:
+    - dnf install -y meson ninja-build
+  script:
+    - mkdir subprojects/libvhost-user/build
+    - cd subprojects/libvhost-user/build
+    - meson
+    - ninja
+
 pages:
   image: $CI_REGISTRY_IMAGE/qemu/ubuntu2004:latest
   stage: test
diff --git a/block/export/vhost-user-blk-server.c b/block/export/vhost-user-blk-server.c
index 62672d1..ab2c4d4 100644
--- a/block/export/vhost-user-blk-server.c
+++ b/block/export/vhost-user-blk-server.c
@@ -11,7 +11,7 @@
  */
 #include "qemu/osdep.h"
 #include "block/block.h"
-#include "contrib/libvhost-user/libvhost-user.h"
+#include "subprojects/libvhost-user/libvhost-user.h" /* only for the type definitions */
 #include "standard-headers/linux/virtio_blk.h"
 #include "qemu/vhost-user-server.h"
 #include "vhost-user-blk-server.h"
@@ -267,7 +267,9 @@ vu_blk_get_config(VuDev *vu_dev, uint8_t *config, uint32_t len)
     VuServer *server = container_of(vu_dev, VuServer, vu_dev);
     VuBlkExport *vexp = container_of(server, VuBlkExport, vu_server);
 
-    g_return_val_if_fail(len <= sizeof(struct virtio_blk_config), -1);
+    if (len > sizeof(struct virtio_blk_config)) {
+        return -1;
+    }
 
     memcpy(config, &vexp->blkcfg, len);
     return 0;
diff --git a/contrib/libvhost-user/meson.build b/contrib/libvhost-user/meson.build
deleted file mode 100644
index a261e76..0000000
--- a/contrib/libvhost-user/meson.build
+++ /dev/null
@@ -1,4 +0,0 @@
-libvhost_user = static_library('vhost-user',
-                               files('libvhost-user.c', 'libvhost-user-glib.c'),
-                               build_by_default: false)
-vhost_user = declare_dependency(link_with: libvhost_user)
diff --git a/contrib/vhost-user-blk/meson.build b/contrib/vhost-user-blk/meson.build
index 5db8cc3..601ea15 100644
--- a/contrib/vhost-user-blk/meson.build
+++ b/contrib/vhost-user-blk/meson.build
@@ -1,6 +1,5 @@
 # FIXME: broken on 32-bit architectures
 executable('vhost-user-blk', files('vhost-user-blk.c'),
-           link_with: libvhost_user,
-           dependencies: qemuutil,
+           dependencies: [qemuutil, vhost_user],
            build_by_default: false,
            install: false)
diff --git a/contrib/vhost-user-blk/vhost-user-blk.c b/contrib/vhost-user-blk/vhost-user-blk.c
index dc981bf..d14b289 100644
--- a/contrib/vhost-user-blk/vhost-user-blk.c
+++ b/contrib/vhost-user-blk/vhost-user-blk.c
@@ -17,8 +17,7 @@
 
 #include "qemu/osdep.h"
 #include "standard-headers/linux/virtio_blk.h"
-#include "contrib/libvhost-user/libvhost-user-glib.h"
-#include "contrib/libvhost-user/libvhost-user.h"
+#include "libvhost-user-glib.h"
 
 #if defined(__linux__)
 #include <linux/fs.h>
@@ -404,7 +403,9 @@ vub_get_config(VuDev *vu_dev, uint8_t *config, uint32_t len)
     VugDev *gdev;
     VubDev *vdev_blk;
 
-    g_return_val_if_fail(len <= sizeof(struct virtio_blk_config), -1);
+    if (len > sizeof(struct virtio_blk_config)) {
+        return -1;
+    }
 
     gdev = container_of(vu_dev, VugDev, parent);
     vdev_blk = container_of(gdev, VubDev, parent);
diff --git a/contrib/vhost-user-gpu/meson.build b/contrib/vhost-user-gpu/meson.build
index c487ca7..2fc2320 100644
--- a/contrib/vhost-user-gpu/meson.build
+++ b/contrib/vhost-user-gpu/meson.build
@@ -2,8 +2,7 @@ if 'CONFIG_TOOLS' in config_host and 'CONFIG_VIRGL' in config_host \
     and 'CONFIG_GBM' in config_host and 'CONFIG_LINUX' in config_host \
     and pixman.found()
   executable('vhost-user-gpu', files('vhost-user-gpu.c', 'virgl.c', 'vugbm.c'),
-             link_with: libvhost_user,
-             dependencies: [qemuutil, pixman, gbm, virgl],
+             dependencies: [qemuutil, pixman, gbm, virgl, vhost_user],
              install: true,
              install_dir: get_option('libexecdir'))
 
diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
index a019d0a..f445ef2 100644
--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
+++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
@@ -1044,7 +1044,9 @@ vg_get_config(VuDev *dev, uint8_t *config, uint32_t len)
 {
     VuGpu *g = container_of(dev, VuGpu, dev.parent);
 
-    g_return_val_if_fail(len <= sizeof(struct virtio_gpu_config), -1);
+    if (len > sizeof(struct virtio_gpu_config)) {
+        return -1;
+    }
 
     if (opt_virgl) {
         g->virtio_config.num_capsets = vg_virgl_get_num_capsets();
diff --git a/contrib/vhost-user-gpu/vugpu.h b/contrib/vhost-user-gpu/vugpu.h
index 3153c9a..bdf9a74 100644
--- a/contrib/vhost-user-gpu/vugpu.h
+++ b/contrib/vhost-user-gpu/vugpu.h
@@ -17,7 +17,7 @@
 
 #include "qemu/osdep.h"
 
-#include "contrib/libvhost-user/libvhost-user-glib.h"
+#include "libvhost-user-glib.h"
 #include "standard-headers/linux/virtio_gpu.h"
 
 #include "qemu/queue.h"
diff --git a/contrib/vhost-user-input/main.c b/contrib/vhost-user-input/main.c
index 6020c6f..d2de47c 100644
--- a/contrib/vhost-user-input/main.c
+++ b/contrib/vhost-user-input/main.c
@@ -12,8 +12,7 @@
 #include "qemu/iov.h"
 #include "qemu/bswap.h"
 #include "qemu/sockets.h"
-#include "contrib/libvhost-user/libvhost-user.h"
-#include "contrib/libvhost-user/libvhost-user-glib.h"
+#include "libvhost-user-glib.h"
 #include "standard-headers/linux/virtio_input.h"
 #include "qapi/error.h"
 
@@ -212,7 +211,9 @@ static int vi_get_config(VuDev *dev, uint8_t *config, uint32_t len)
 {
     VuInput *vi = container_of(dev, VuInput, dev.parent);
 
-    g_return_val_if_fail(len <= sizeof(*vi->sel_config), -1);
+    if (len > sizeof(*vi->sel_config)) {
+        return -1;
+    }
 
     if (vi->sel_config) {
         memcpy(config, vi->sel_config, len);
diff --git a/contrib/vhost-user-input/meson.build b/contrib/vhost-user-input/meson.build
index 1eeb132..21a9ed4 100644
--- a/contrib/vhost-user-input/meson.build
+++ b/contrib/vhost-user-input/meson.build
@@ -1,5 +1,4 @@
 executable('vhost-user-input', files('main.c'),
-           link_with: libvhost_user,
-           dependencies: qemuutil,
+           dependencies: [qemuutil, vhost_user],
            build_by_default: targetos == 'linux',
            install: false)
diff --git a/contrib/vhost-user-scsi/meson.build b/contrib/vhost-user-scsi/meson.build
index 257cbff..044c50b 100644
--- a/contrib/vhost-user-scsi/meson.build
+++ b/contrib/vhost-user-scsi/meson.build
@@ -1,7 +1,6 @@
 if 'CONFIG_LIBISCSI' in config_host
   executable('vhost-user-scsi', files('vhost-user-scsi.c'),
-             link_with: libvhost_user,
-             dependencies: [qemuutil, libiscsi],
+             dependencies: [qemuutil, libiscsi, vhost_user],
              build_by_default: targetos == 'linux',
              install: false)
 endif
diff --git a/contrib/vhost-user-scsi/vhost-user-scsi.c b/contrib/vhost-user-scsi/vhost-user-scsi.c
index 0f9ba4b..4f6e3e2 100644
--- a/contrib/vhost-user-scsi/vhost-user-scsi.c
+++ b/contrib/vhost-user-scsi/vhost-user-scsi.c
@@ -15,7 +15,7 @@
 #define inline __attribute__((gnu_inline))  /* required for libiscsi v1.9.0 */
 #include <iscsi/scsi-lowlevel.h>
 #undef inline
-#include "contrib/libvhost-user/libvhost-user-glib.h"
+#include "libvhost-user-glib.h"
 #include "standard-headers/linux/virtio_scsi.h"
 
 
@@ -232,6 +232,7 @@ static void vus_proc_req(VuDev *vu_dev, int idx)
     VugDev *gdev;
     VusDev *vdev_scsi;
     VuVirtq *vq;
+    VuVirtqElement *elem = NULL;
 
     assert(vu_dev);
 
@@ -248,7 +249,6 @@ static void vus_proc_req(VuDev *vu_dev, int idx)
     g_debug("Got kicked on vq[%d]@%p", idx, vq);
 
     while (1) {
-        VuVirtqElement *elem;
         VirtIOSCSICmdReq *req;
         VirtIOSCSICmdResp *rsp;
 
@@ -288,6 +288,7 @@ static void vus_proc_req(VuDev *vu_dev, int idx)
 
         free(elem);
     }
+    free(elem);
 }
 
 static void vus_queue_set_started(VuDev *vu_dev, int idx, bool started)
diff --git a/docs/specs/acpi_cpu_hotplug.txt b/docs/specs/acpi_cpu_hotplug.txt
index 9bb22d1..9bd59ae 100644
--- a/docs/specs/acpi_cpu_hotplug.txt
+++ b/docs/specs/acpi_cpu_hotplug.txt
@@ -56,8 +56,11 @@ read access:
               no device check event to OSPM was issued.
               It's valid only when bit 0 is set.
            2: Device remove event, used to distinguish device for which
-              no device eject request to OSPM was issued.
-           3-7: reserved and should be ignored by OSPM
+              no device eject request to OSPM was issued. Firmware must
+              ignore this bit.
+           3: reserved and should be ignored by OSPM
+           4: if set to 1, OSPM requests firmware to perform device eject.
+           5-7: reserved and should be ignored by OSPM
     [0x5-0x7] reserved
     [0x8] Command data: (DWORD access)
           contains 0 unless value last stored in 'Command field' is one of:
@@ -79,10 +82,16 @@ write access:
                selected CPU device
             2: if set to 1 clears device remove event, set by OSPM
                after it has emitted device eject request for the
-               selected CPU device
+               selected CPU device.
             3: if set to 1 initiates device eject, set by OSPM when it
-               triggers CPU device removal and calls _EJ0 method
-            4-7: reserved, OSPM must clear them before writing to register
+               triggers CPU device removal and calls _EJ0 method or by firmware
+               when bit #4 is set. In case bit #4 were set, it's cleared as
+               part of device eject.
+            4: if set to 1, OSPM hands over device eject to firmware.
+               Firmware shall issue device eject request as described above
+               (bit #3) and OSPM should not touch device eject bit (#3) in case
+               it's asked firmware to perform CPU device eject.
+            5-7: reserved, OSPM must clear them before writing to register
     [0x5] Command field: (1 byte access)
           value:
             0: selects a CPU device with inserting/removing events and
diff --git a/hmp-commands.hx b/hmp-commands.hx
index ff2d7aa..dd460eb 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1302,8 +1302,8 @@ ERST
 	              " -c for correctable error\n\t\t\t"
                       "<id> = qdev device id\n\t\t\t"
                       "<error_status> = error string or 32bit\n\t\t\t"
-                      "<tlb header> = 32bit x 4\n\t\t\t"
-                      "<tlb header prefix> = 32bit x 4",
+                      "<tlp header> = 32bit x 4\n\t\t\t"
+                      "<tlp header prefix> = 32bit x 4",
         .cmd        = hmp_pcie_aer_inject_error,
     },
 
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 3792ba9..f976aa6 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -27,6 +27,9 @@
 #include "sysemu/numa.h"
 #include "hw/boards.h"
 #include "hw/acpi/tpm.h"
+#include "hw/pci/pci_host.h"
+#include "hw/pci/pci_bus.h"
+#include "hw/pci/pci_bridge.h"
 
 static GArray *build_alloc_array(void)
 {
@@ -55,6 +58,128 @@ static void build_append_array(GArray *array, GArray *val)
 
 #define ACPI_NAMESEG_LEN 4
 
+void crs_range_insert(GPtrArray *ranges, uint64_t base, uint64_t limit)
+{
+    CrsRangeEntry *entry;
+
+    entry = g_malloc(sizeof(*entry));
+    entry->base = base;
+    entry->limit = limit;
+
+    g_ptr_array_add(ranges, entry);
+}
+
+static void crs_range_free(gpointer data)
+{
+    CrsRangeEntry *entry = (CrsRangeEntry *)data;
+    g_free(entry);
+}
+
+void crs_range_set_init(CrsRangeSet *range_set)
+{
+    range_set->io_ranges = g_ptr_array_new_with_free_func(crs_range_free);
+    range_set->mem_ranges = g_ptr_array_new_with_free_func(crs_range_free);
+    range_set->mem_64bit_ranges =
+            g_ptr_array_new_with_free_func(crs_range_free);
+}
+
+void crs_range_set_free(CrsRangeSet *range_set)
+{
+    g_ptr_array_free(range_set->io_ranges, true);
+    g_ptr_array_free(range_set->mem_ranges, true);
+    g_ptr_array_free(range_set->mem_64bit_ranges, true);
+}
+
+static gint crs_range_compare(gconstpointer a, gconstpointer b)
+{
+    CrsRangeEntry *entry_a = *(CrsRangeEntry **)a;
+    CrsRangeEntry *entry_b = *(CrsRangeEntry **)b;
+
+    if (entry_a->base < entry_b->base) {
+        return -1;
+    } else if (entry_a->base > entry_b->base) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+/*
+ * crs_replace_with_free_ranges - given the 'used' ranges within [start - end]
+ * interval, computes the 'free' ranges from the same interval.
+ * Example: If the input array is { [a1 - a2],[b1 - b2] }, the function
+ * will return { [base - a1], [a2 - b1], [b2 - limit] }.
+ */
+void crs_replace_with_free_ranges(GPtrArray *ranges,
+                                  uint64_t start, uint64_t end)
+{
+    GPtrArray *free_ranges = g_ptr_array_new();
+    uint64_t free_base = start;
+    int i;
+
+    g_ptr_array_sort(ranges, crs_range_compare);
+    for (i = 0; i < ranges->len; i++) {
+        CrsRangeEntry *used = g_ptr_array_index(ranges, i);
+
+        if (free_base < used->base) {
+            crs_range_insert(free_ranges, free_base, used->base - 1);
+        }
+
+        free_base = used->limit + 1;
+    }
+
+    if (free_base < end) {
+        crs_range_insert(free_ranges, free_base, end);
+    }
+
+    g_ptr_array_set_size(ranges, 0);
+    for (i = 0; i < free_ranges->len; i++) {
+        g_ptr_array_add(ranges, g_ptr_array_index(free_ranges, i));
+    }
+
+    g_ptr_array_free(free_ranges, true);
+}
+
+/*
+ * crs_range_merge - merges adjacent ranges in the given array.
+ * Array elements are deleted and replaced with the merged ranges.
+ */
+static void crs_range_merge(GPtrArray *range)
+{
+    GPtrArray *tmp = g_ptr_array_new_with_free_func(crs_range_free);
+    CrsRangeEntry *entry;
+    uint64_t range_base, range_limit;
+    int i;
+
+    if (!range->len) {
+        return;
+    }
+
+    g_ptr_array_sort(range, crs_range_compare);
+
+    entry = g_ptr_array_index(range, 0);
+    range_base = entry->base;
+    range_limit = entry->limit;
+    for (i = 1; i < range->len; i++) {
+        entry = g_ptr_array_index(range, i);
+        if (entry->base - 1 == range_limit) {
+            range_limit = entry->limit;
+        } else {
+            crs_range_insert(tmp, range_base, range_limit);
+            range_base = entry->base;
+            range_limit = entry->limit;
+        }
+    }
+    crs_range_insert(tmp, range_base, range_limit);
+
+    g_ptr_array_set_size(range, 0);
+    for (i = 0; i < tmp->len; i++) {
+        entry = g_ptr_array_index(tmp, i);
+        crs_range_insert(range, entry->base, entry->limit);
+    }
+    g_ptr_array_free(tmp, true);
+}
+
 static void
 build_append_nameseg(GArray *array, const char *seg)
 {
@@ -1951,6 +2076,166 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog)
                  tpm2_ptr, "TPM2", table_data->len - tpm2_start, 4, NULL, NULL);
 }
 
+Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set)
+{
+    Aml *crs = aml_resource_template();
+    CrsRangeSet temp_range_set;
+    CrsRangeEntry *entry;
+    uint8_t max_bus = pci_bus_num(host->bus);
+    uint8_t type;
+    int devfn;
+    int i;
+
+    crs_range_set_init(&temp_range_set);
+    for (devfn = 0; devfn < ARRAY_SIZE(host->bus->devices); devfn++) {
+        uint64_t range_base, range_limit;
+        PCIDevice *dev = host->bus->devices[devfn];
+
+        if (!dev) {
+            continue;
+        }
+
+        for (i = 0; i < PCI_NUM_REGIONS; i++) {
+            PCIIORegion *r = &dev->io_regions[i];
+
+            range_base = r->addr;
+            range_limit = r->addr + r->size - 1;
+
+            /*
+             * Work-around for old bioses
+             * that do not support multiple root buses
+             */
+            if (!range_base || range_base > range_limit) {
+                continue;
+            }
+
+            if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
+                crs_range_insert(temp_range_set.io_ranges,
+                                 range_base, range_limit);
+            } else { /* "memory" */
+                uint64_t length = range_limit - range_base + 1;
+                if (range_limit <= UINT32_MAX && length <= UINT32_MAX) {
+                    crs_range_insert(temp_range_set.mem_ranges, range_base,
+                                     range_limit);
+                } else {
+                    crs_range_insert(temp_range_set.mem_64bit_ranges,
+                                     range_base, range_limit);
+                }
+            }
+        }
+
+        type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
+        if (type == PCI_HEADER_TYPE_BRIDGE) {
+            uint8_t subordinate = dev->config[PCI_SUBORDINATE_BUS];
+            if (subordinate > max_bus) {
+                max_bus = subordinate;
+            }
+
+            range_base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
+            range_limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
+
+             /*
+              * Work-around for old bioses
+              * that do not support multiple root buses
+              */
+            if (range_base && range_base <= range_limit) {
+                crs_range_insert(temp_range_set.io_ranges,
+                                 range_base, range_limit);
+            }
+
+            range_base =
+                pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
+            range_limit =
+                pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
+
+            /*
+             * Work-around for old bioses
+             * that do not support multiple root buses
+             */
+            if (range_base && range_base <= range_limit) {
+                uint64_t length = range_limit - range_base + 1;
+                if (range_limit <= UINT32_MAX && length <= UINT32_MAX) {
+                    crs_range_insert(temp_range_set.mem_ranges,
+                                     range_base, range_limit);
+                } else {
+                    crs_range_insert(temp_range_set.mem_64bit_ranges,
+                                     range_base, range_limit);
+                }
+            }
+
+            range_base =
+                pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
+            range_limit =
+                pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
+
+            /*
+             * Work-around for old bioses
+             * that do not support multiple root buses
+             */
+            if (range_base && range_base <= range_limit) {
+                uint64_t length = range_limit - range_base + 1;
+                if (range_limit <= UINT32_MAX && length <= UINT32_MAX) {
+                    crs_range_insert(temp_range_set.mem_ranges,
+                                     range_base, range_limit);
+                } else {
+                    crs_range_insert(temp_range_set.mem_64bit_ranges,
+                                     range_base, range_limit);
+                }
+            }
+        }
+    }
+
+    crs_range_merge(temp_range_set.io_ranges);
+    for (i = 0; i < temp_range_set.io_ranges->len; i++) {
+        entry = g_ptr_array_index(temp_range_set.io_ranges, i);
+        aml_append(crs,
+                   aml_word_io(AML_MIN_FIXED, AML_MAX_FIXED,
+                               AML_POS_DECODE, AML_ENTIRE_RANGE,
+                               0, entry->base, entry->limit, 0,
+                               entry->limit - entry->base + 1));
+        crs_range_insert(range_set->io_ranges, entry->base, entry->limit);
+    }
+
+    crs_range_merge(temp_range_set.mem_ranges);
+    for (i = 0; i < temp_range_set.mem_ranges->len; i++) {
+        entry = g_ptr_array_index(temp_range_set.mem_ranges, i);
+        assert(entry->limit <= UINT32_MAX &&
+               (entry->limit - entry->base + 1) <= UINT32_MAX);
+        aml_append(crs,
+                   aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
+                                    AML_MAX_FIXED, AML_NON_CACHEABLE,
+                                    AML_READ_WRITE,
+                                    0, entry->base, entry->limit, 0,
+                                    entry->limit - entry->base + 1));
+        crs_range_insert(range_set->mem_ranges, entry->base, entry->limit);
+    }
+
+    crs_range_merge(temp_range_set.mem_64bit_ranges);
+    for (i = 0; i < temp_range_set.mem_64bit_ranges->len; i++) {
+        entry = g_ptr_array_index(temp_range_set.mem_64bit_ranges, i);
+        aml_append(crs,
+                   aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED,
+                                    AML_MAX_FIXED, AML_NON_CACHEABLE,
+                                    AML_READ_WRITE,
+                                    0, entry->base, entry->limit, 0,
+                                    entry->limit - entry->base + 1));
+        crs_range_insert(range_set->mem_64bit_ranges,
+                         entry->base, entry->limit);
+    }
+
+    crs_range_set_free(&temp_range_set);
+
+    aml_append(crs,
+        aml_word_bus_number(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
+                            0,
+                            pci_bus_num(host->bus),
+                            max_bus,
+                            0,
+                            max_bus - pci_bus_num(host->bus) + 1));
+
+    return crs;
+}
+
 /* ACPI 5.0: 6.4.3.8.2 Serial Bus Connection Descriptors */
 static Aml *aml_serial_bus_device(uint8_t serial_bus_type, uint8_t flags,
                                   uint16_t type_flags,
diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
index f099b50..6350caa 100644
--- a/hw/acpi/cpu.c
+++ b/hw/acpi/cpu.c
@@ -71,6 +71,7 @@ static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size)
         val |= cdev->cpu ? 1 : 0;
         val |= cdev->is_inserting ? 2 : 0;
         val |= cdev->is_removing  ? 4 : 0;
+        val |= cdev->fw_remove  ? 16 : 0;
         trace_cpuhp_acpi_read_flags(cpu_st->selector, val);
         break;
     case ACPI_CPU_CMD_DATA_OFFSET_RW:
@@ -148,6 +149,14 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
             hotplug_ctrl = qdev_get_hotplug_handler(dev);
             hotplug_handler_unplug(hotplug_ctrl, dev, NULL);
             object_unparent(OBJECT(dev));
+            cdev->fw_remove = false;
+        } else if (data & 16) {
+            if (!cdev->cpu || cdev->cpu == first_cpu) {
+                trace_cpuhp_acpi_fw_remove_invalid_cpu(cpu_st->selector);
+                break;
+            }
+            trace_cpuhp_acpi_fw_remove_cpu(cpu_st->selector);
+            cdev->fw_remove = true;
         }
         break;
     case ACPI_CPU_CMD_OFFSET_WR:
@@ -159,7 +168,8 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
 
                 do {
                     cdev = &cpu_st->devs[iter];
-                    if (cdev->is_inserting || cdev->is_removing) {
+                    if (cdev->is_inserting || cdev->is_removing ||
+                        cdev->fw_remove) {
                         cpu_st->selector = iter;
                         trace_cpuhp_acpi_cpu_has_events(cpu_st->selector,
                             cdev->is_inserting, cdev->is_removing);
@@ -332,6 +342,7 @@ const VMStateDescription vmstate_cpu_hotplug = {
 #define CPU_INSERT_EVENT  "CINS"
 #define CPU_REMOVE_EVENT  "CRMV"
 #define CPU_EJECT_EVENT   "CEJ0"
+#define CPU_FW_EJECT_EVENT "CEJF"
 
 void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
                     hwaddr io_base,
@@ -384,7 +395,9 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
         aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1));
         /* initiates device eject, write only */
         aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1));
-        aml_append(field, aml_reserved_field(4));
+        /* tell firmware to do device eject, write only */
+        aml_append(field, aml_named_field(CPU_FW_EJECT_EVENT, 1));
+        aml_append(field, aml_reserved_field(3));
         aml_append(field, aml_named_field(CPU_COMMAND, 8));
         aml_append(cpu_ctrl_dev, field);
 
@@ -419,6 +432,7 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
         Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT);
         Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT);
         Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT);
+        Aml *fw_ej_evt = aml_name("%s.%s", cphp_res_path, CPU_FW_EJECT_EVENT);
 
         aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010")));
         aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05")));
@@ -461,7 +475,13 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
 
             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
             aml_append(method, aml_store(idx, cpu_selector));
-            aml_append(method, aml_store(one, ej_evt));
+            if (opts.fw_unplugs_cpu) {
+                aml_append(method, aml_store(one, fw_ej_evt));
+                aml_append(method, aml_store(aml_int(OVMF_CPUHP_SMI_CMD),
+                           aml_name("%s", opts.smi_path)));
+            } else {
+                aml_append(method, aml_store(one, ej_evt));
+            }
             aml_append(method, aml_release(ctrl_lock));
         }
         aml_append(cpus_dev, method);
diff --git a/hw/acpi/trace-events b/hw/acpi/trace-events
index afbc77d..f91ced4 100644
--- a/hw/acpi/trace-events
+++ b/hw/acpi/trace-events
@@ -29,6 +29,8 @@ cpuhp_acpi_clear_inserting_evt(uint32_t idx) "idx[0x%"PRIx32"]"
 cpuhp_acpi_clear_remove_evt(uint32_t idx) "idx[0x%"PRIx32"]"
 cpuhp_acpi_ejecting_invalid_cpu(uint32_t idx) "0x%"PRIx32
 cpuhp_acpi_ejecting_cpu(uint32_t idx) "0x%"PRIx32
+cpuhp_acpi_fw_remove_invalid_cpu(uint32_t idx) "0x%"PRIx32
+cpuhp_acpi_fw_remove_cpu(uint32_t idx) "0x%"PRIx32
 cpuhp_acpi_write_ost_ev(uint32_t slot, uint32_t ev) "idx[0x%"PRIx32"] OST EVENT: 0x%"PRIx32
 cpuhp_acpi_write_ost_status(uint32_t slot, uint32_t st) "idx[0x%"PRIx32"] OST STATUS: 0x%"PRIx32
 
diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index 3838db1..405d5c5 100644
--- a/hw/arm/smmu-common.c
+++ b/hw/arm/smmu-common.c
@@ -465,14 +465,15 @@ IOMMUMemoryRegion *smmu_iommu_mr(SMMUState *s, uint32_t sid)
 /* Unmap the whole notifier's range */
 static void smmu_unmap_notifier_range(IOMMUNotifier *n)
 {
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
 
-    entry.target_as = &address_space_memory;
-    entry.iova = n->start;
-    entry.perm = IOMMU_NONE;
-    entry.addr_mask = n->end - n->start;
+    event.type = IOMMU_NOTIFIER_UNMAP;
+    event.entry.target_as = &address_space_memory;
+    event.entry.iova = n->start;
+    event.entry.perm = IOMMU_NONE;
+    event.entry.addr_mask = n->end - n->start;
 
-    memory_region_notify_one(n, &entry);
+    memory_region_notify_iommu_one(n, &event);
 }
 
 /* Unmap all notifiers attached to @mr */
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 22607c3..bbca0e9 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -800,7 +800,7 @@ static void smmuv3_notify_iova(IOMMUMemoryRegion *mr,
                                uint8_t tg, uint64_t num_pages)
 {
     SMMUDevice *sdev = container_of(mr, SMMUDevice, iommu);
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
     uint8_t granule = tg;
 
     if (!tg) {
@@ -823,12 +823,13 @@ static void smmuv3_notify_iova(IOMMUMemoryRegion *mr,
         granule = tt->granule_sz;
     }
 
-    entry.target_as = &address_space_memory;
-    entry.iova = iova;
-    entry.addr_mask = num_pages * (1 << granule) - 1;
-    entry.perm = IOMMU_NONE;
+    event.type = IOMMU_NOTIFIER_UNMAP;
+    event.entry.target_as = &address_space_memory;
+    event.entry.iova = iova;
+    event.entry.addr_mask = num_pages * (1 << granule) - 1;
+    event.entry.perm = IOMMU_NONE;
 
-    memory_region_notify_one(n, &entry);
+    memory_region_notify_iommu_one(n, &event);
 }
 
 /* invalidate an asid/iova range tuple in all mr's */
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 9747a64..711cf20 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -57,6 +57,8 @@
 
 #define ARM_SPI_BASE 32
 
+#define ACPI_BUILD_TABLE_SIZE             0x20000
+
 static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus)
 {
     uint16_t i;
@@ -153,7 +155,8 @@ static void acpi_dsdt_add_virtio(Aml *scope,
 }
 
 static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
-                              uint32_t irq, bool use_highmem, bool highmem_ecam)
+                              uint32_t irq, bool use_highmem, bool highmem_ecam,
+                              VirtMachineState *vms)
 {
     int ecam_id = VIRT_ECAM_ID(highmem_ecam);
     struct GPEXConfig cfg = {
@@ -161,6 +164,7 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
         .pio    = memmap[VIRT_PCIE_PIO],
         .ecam   = memmap[ecam_id],
         .irq    = irq,
+        .bus    = vms->bus,
     };
 
     if (use_highmem) {
@@ -609,7 +613,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
     acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
                     (irqmap[VIRT_MMIO] + ARM_SPI_BASE), NUM_VIRTIO_TRANSPORTS);
     acpi_dsdt_add_pci(scope, memmap, (irqmap[VIRT_PCIE] + ARM_SPI_BASE),
-                      vms->highmem, vms->highmem_ecam);
+                      vms->highmem, vms->highmem_ecam, vms);
     if (vms->acpi_dev) {
         build_ged_aml(scope, "\\_SB."GED_DEVICE,
                       HOTPLUG_HANDLER(vms->acpi_dev),
@@ -654,6 +658,15 @@ struct AcpiBuildState {
     bool patched;
 } AcpiBuildState;
 
+static void acpi_align_size(GArray *blob, unsigned align)
+{
+    /*
+     * Align size to multiple of given size. This reduces the chance
+     * we need to change size in the future (breaking cross version migration).
+     */
+    g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
+}
+
 static
 void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
 {
@@ -741,6 +754,20 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
     }
 
+    /*
+     * The align size is 128, warn if 64k is not enough therefore
+     * the align size could be resized.
+     */
+    if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) {
+        warn_report("ACPI table size %u exceeds %d bytes,"
+                    " migration may not work",
+                    tables_blob->len, ACPI_BUILD_TABLE_SIZE / 2);
+        error_printf("Try removing CPUs, NUMA nodes, memory slots"
+                     " or PCI bridges.");
+    }
+    acpi_align_size(tables_blob, ACPI_BUILD_TABLE_SIZE);
+
+
     /* Cleanup memory that's no longer used. */
     g_array_free(table_offsets, true);
 }
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 27dbeb5..22572c3 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1289,7 +1289,8 @@ static void create_pcie(VirtMachineState *vms)
     }
 
     pci = PCI_HOST_BRIDGE(dev);
-    if (pci->bus) {
+    vms->bus = pci->bus;
+    if (vms->bus) {
         for (i = 0; i < nb_nics; i++) {
             NICInfo *nd = &nd_table[i];
 
@@ -1346,7 +1347,7 @@ static void create_pcie(VirtMachineState *vms)
 
         switch (vms->iommu) {
         case VIRT_IOMMU_SMMUV3:
-            create_smmu(vms, pci->bus);
+            create_smmu(vms, vms->bus);
             qemu_fdt_setprop_cells(vms->fdt, nodename, "iommu-map",
                                    0x0, vms->iommu_phandle, 0x0, 0x10000);
             break;
@@ -1481,6 +1482,8 @@ void virt_machine_done(Notifier *notifier, void *data)
         exit(1);
     }
 
+    fw_cfg_add_extra_pci_roots(vms->bus, vms->fw_cfg);
+
     virt_acpi_setup(vms);
     virt_build_smbios(vms);
 }
@@ -2587,10 +2590,17 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
+static void virt_machine_6_0_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE_AS_LATEST(6, 0)
+
 static void virt_machine_5_2_options(MachineClass *mc)
 {
+    virt_machine_6_0_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_5_2, hw_compat_5_2_len);
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(5, 2)
+DEFINE_VIRT_MACHINE(5, 2)
 
 static void virt_machine_5_1_options(MachineClass *mc)
 {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index d040804..9c41b94 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -28,6 +28,9 @@
 #include "hw/mem/nvdimm.h"
 #include "migration/vmstate.h"
 
+GlobalProperty hw_compat_5_2[] = {};
+const size_t hw_compat_5_2_len = G_N_ELEMENTS(hw_compat_5_2);
+
 GlobalProperty hw_compat_5_1[] = {
     { "vhost-scsi", "num_queues", "1"},
     { "vhost-user-blk", "num-queues", "1"},
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 262bca7..cbdff0b 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -214,26 +214,17 @@ void device_listener_unregister(DeviceListener *listener)
 
 bool qdev_should_hide_device(QemuOpts *opts)
 {
-    int rc = -1;
     DeviceListener *listener;
 
     QTAILQ_FOREACH(listener, &device_listeners, link) {
-       if (listener->should_be_hidden) {
-            /*
-             * should_be_hidden_will return
-             *  1 if device matches opts and it should be hidden
-             *  0 if device matches opts and should not be hidden
-             *  -1 if device doesn't match ops
-             */
-            rc = listener->should_be_hidden(listener, opts);
-        }
-
-        if (rc > 0) {
-            break;
+        if (listener->hide_device) {
+            if (listener->hide_device(listener, opts)) {
+                return true;
+            }
         }
     }
 
-    return rc > 0;
+    return false;
 }
 
 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 1f5c211..f18b71d 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -96,6 +96,7 @@ typedef struct AcpiPmInfo {
     bool s4_disabled;
     bool pcihp_bridge_en;
     bool smi_on_cpuhp;
+    bool smi_on_cpu_unplug;
     bool pcihp_root_en;
     uint8_t s4_val;
     AcpiFadtData fadt;
@@ -197,6 +198,7 @@ static void acpi_get_pm_info(MachineState *machine, AcpiPmInfo *pm)
     pm->pcihp_io_base = 0;
     pm->pcihp_io_len = 0;
     pm->smi_on_cpuhp = false;
+    pm->smi_on_cpu_unplug = false;
 
     assert(obj);
     init_common_fadt_data(machine, obj, &pm->fadt);
@@ -220,6 +222,8 @@ static void acpi_get_pm_info(MachineState *machine, AcpiPmInfo *pm)
         pm->cpu_hp_io_base = ICH9_CPU_HOTPLUG_IO_BASE;
         pm->smi_on_cpuhp =
             !!(smi_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT));
+        pm->smi_on_cpu_unplug =
+            !!(smi_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT));
     }
 
     /* The above need not be conditional on machine type because the reset port
@@ -613,299 +617,6 @@ static Aml *build_prt(bool is_pci0_prt)
     return method;
 }
 
-typedef struct CrsRangeEntry {
-    uint64_t base;
-    uint64_t limit;
-} CrsRangeEntry;
-
-static void crs_range_insert(GPtrArray *ranges, uint64_t base, uint64_t limit)
-{
-    CrsRangeEntry *entry;
-
-    entry = g_malloc(sizeof(*entry));
-    entry->base = base;
-    entry->limit = limit;
-
-    g_ptr_array_add(ranges, entry);
-}
-
-static void crs_range_free(gpointer data)
-{
-    CrsRangeEntry *entry = (CrsRangeEntry *)data;
-    g_free(entry);
-}
-
-typedef struct CrsRangeSet {
-    GPtrArray *io_ranges;
-    GPtrArray *mem_ranges;
-    GPtrArray *mem_64bit_ranges;
- } CrsRangeSet;
-
-static void crs_range_set_init(CrsRangeSet *range_set)
-{
-    range_set->io_ranges = g_ptr_array_new_with_free_func(crs_range_free);
-    range_set->mem_ranges = g_ptr_array_new_with_free_func(crs_range_free);
-    range_set->mem_64bit_ranges =
-            g_ptr_array_new_with_free_func(crs_range_free);
-}
-
-static void crs_range_set_free(CrsRangeSet *range_set)
-{
-    g_ptr_array_free(range_set->io_ranges, true);
-    g_ptr_array_free(range_set->mem_ranges, true);
-    g_ptr_array_free(range_set->mem_64bit_ranges, true);
-}
-
-static gint crs_range_compare(gconstpointer a, gconstpointer b)
-{
-    CrsRangeEntry *entry_a = *(CrsRangeEntry **)a;
-    CrsRangeEntry *entry_b = *(CrsRangeEntry **)b;
-
-    if (entry_a->base < entry_b->base) {
-        return -1;
-    } else if (entry_a->base > entry_b->base) {
-        return 1;
-    } else {
-        return 0;
-    }
-}
-
-/*
- * crs_replace_with_free_ranges - given the 'used' ranges within [start - end]
- * interval, computes the 'free' ranges from the same interval.
- * Example: If the input array is { [a1 - a2],[b1 - b2] }, the function
- * will return { [base - a1], [a2 - b1], [b2 - limit] }.
- */
-static void crs_replace_with_free_ranges(GPtrArray *ranges,
-                                         uint64_t start, uint64_t end)
-{
-    GPtrArray *free_ranges = g_ptr_array_new();
-    uint64_t free_base = start;
-    int i;
-
-    g_ptr_array_sort(ranges, crs_range_compare);
-    for (i = 0; i < ranges->len; i++) {
-        CrsRangeEntry *used = g_ptr_array_index(ranges, i);
-
-        if (free_base < used->base) {
-            crs_range_insert(free_ranges, free_base, used->base - 1);
-        }
-
-        free_base = used->limit + 1;
-    }
-
-    if (free_base < end) {
-        crs_range_insert(free_ranges, free_base, end);
-    }
-
-    g_ptr_array_set_size(ranges, 0);
-    for (i = 0; i < free_ranges->len; i++) {
-        g_ptr_array_add(ranges, g_ptr_array_index(free_ranges, i));
-    }
-
-    g_ptr_array_free(free_ranges, true);
-}
-
-/*
- * crs_range_merge - merges adjacent ranges in the given array.
- * Array elements are deleted and replaced with the merged ranges.
- */
-static void crs_range_merge(GPtrArray *range)
-{
-    GPtrArray *tmp =  g_ptr_array_new_with_free_func(crs_range_free);
-    CrsRangeEntry *entry;
-    uint64_t range_base, range_limit;
-    int i;
-
-    if (!range->len) {
-        return;
-    }
-
-    g_ptr_array_sort(range, crs_range_compare);
-
-    entry = g_ptr_array_index(range, 0);
-    range_base = entry->base;
-    range_limit = entry->limit;
-    for (i = 1; i < range->len; i++) {
-        entry = g_ptr_array_index(range, i);
-        if (entry->base - 1 == range_limit) {
-            range_limit = entry->limit;
-        } else {
-            crs_range_insert(tmp, range_base, range_limit);
-            range_base = entry->base;
-            range_limit = entry->limit;
-        }
-    }
-    crs_range_insert(tmp, range_base, range_limit);
-
-    g_ptr_array_set_size(range, 0);
-    for (i = 0; i < tmp->len; i++) {
-        entry = g_ptr_array_index(tmp, i);
-        crs_range_insert(range, entry->base, entry->limit);
-    }
-    g_ptr_array_free(tmp, true);
-}
-
-static Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set)
-{
-    Aml *crs = aml_resource_template();
-    CrsRangeSet temp_range_set;
-    CrsRangeEntry *entry;
-    uint8_t max_bus = pci_bus_num(host->bus);
-    uint8_t type;
-    int devfn;
-    int i;
-
-    crs_range_set_init(&temp_range_set);
-    for (devfn = 0; devfn < ARRAY_SIZE(host->bus->devices); devfn++) {
-        uint64_t range_base, range_limit;
-        PCIDevice *dev = host->bus->devices[devfn];
-
-        if (!dev) {
-            continue;
-        }
-
-        for (i = 0; i < PCI_NUM_REGIONS; i++) {
-            PCIIORegion *r = &dev->io_regions[i];
-
-            range_base = r->addr;
-            range_limit = r->addr + r->size - 1;
-
-            /*
-             * Work-around for old bioses
-             * that do not support multiple root buses
-             */
-            if (!range_base || range_base > range_limit) {
-                continue;
-            }
-
-            if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
-                crs_range_insert(temp_range_set.io_ranges,
-                                 range_base, range_limit);
-            } else { /* "memory" */
-                uint64_t length = range_limit - range_base + 1;
-                if (range_limit <= UINT32_MAX && length <= UINT32_MAX) {
-                    crs_range_insert(temp_range_set.mem_ranges, range_base,
-                                     range_limit);
-                } else {
-                    crs_range_insert(temp_range_set.mem_64bit_ranges,
-                                     range_base, range_limit);
-                }
-            }
-        }
-
-        type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
-        if (type == PCI_HEADER_TYPE_BRIDGE) {
-            uint8_t subordinate = dev->config[PCI_SUBORDINATE_BUS];
-            if (subordinate > max_bus) {
-                max_bus = subordinate;
-            }
-
-            range_base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
-            range_limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
-
-            /*
-             * Work-around for old bioses
-             * that do not support multiple root buses
-             */
-            if (range_base && range_base <= range_limit) {
-                crs_range_insert(temp_range_set.io_ranges,
-                                 range_base, range_limit);
-            }
-
-            range_base =
-                pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
-            range_limit =
-                pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
-
-            /*
-             * Work-around for old bioses
-             * that do not support multiple root buses
-             */
-            if (range_base && range_base <= range_limit) {
-                uint64_t length = range_limit - range_base + 1;
-                if (range_limit <= UINT32_MAX && length <= UINT32_MAX) {
-                    crs_range_insert(temp_range_set.mem_ranges,
-                                     range_base, range_limit);
-                } else {
-                    crs_range_insert(temp_range_set.mem_64bit_ranges,
-                                     range_base, range_limit);
-                }
-            }
-
-            range_base =
-                pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
-            range_limit =
-                pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
-
-            /*
-             * Work-around for old bioses
-             * that do not support multiple root buses
-             */
-            if (range_base && range_base <= range_limit) {
-                uint64_t length = range_limit - range_base + 1;
-                if (range_limit <= UINT32_MAX && length <= UINT32_MAX) {
-                    crs_range_insert(temp_range_set.mem_ranges,
-                                     range_base, range_limit);
-                } else {
-                    crs_range_insert(temp_range_set.mem_64bit_ranges,
-                                     range_base, range_limit);
-                }
-            }
-        }
-    }
-
-    crs_range_merge(temp_range_set.io_ranges);
-    for (i = 0; i < temp_range_set.io_ranges->len; i++) {
-        entry = g_ptr_array_index(temp_range_set.io_ranges, i);
-        aml_append(crs,
-                   aml_word_io(AML_MIN_FIXED, AML_MAX_FIXED,
-                               AML_POS_DECODE, AML_ENTIRE_RANGE,
-                               0, entry->base, entry->limit, 0,
-                               entry->limit - entry->base + 1));
-        crs_range_insert(range_set->io_ranges, entry->base, entry->limit);
-    }
-
-    crs_range_merge(temp_range_set.mem_ranges);
-    for (i = 0; i < temp_range_set.mem_ranges->len; i++) {
-        entry = g_ptr_array_index(temp_range_set.mem_ranges, i);
-        assert(entry->limit <= UINT32_MAX &&
-               (entry->limit - entry->base + 1) <= UINT32_MAX);
-        aml_append(crs,
-                   aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
-                                    AML_MAX_FIXED, AML_NON_CACHEABLE,
-                                    AML_READ_WRITE,
-                                    0, entry->base, entry->limit, 0,
-                                    entry->limit - entry->base + 1));
-        crs_range_insert(range_set->mem_ranges, entry->base, entry->limit);
-    }
-
-    crs_range_merge(temp_range_set.mem_64bit_ranges);
-    for (i = 0; i < temp_range_set.mem_64bit_ranges->len; i++) {
-        entry = g_ptr_array_index(temp_range_set.mem_64bit_ranges, i);
-        aml_append(crs,
-                   aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED,
-                                    AML_MAX_FIXED, AML_NON_CACHEABLE,
-                                    AML_READ_WRITE,
-                                    0, entry->base, entry->limit, 0,
-                                    entry->limit - entry->base + 1));
-        crs_range_insert(range_set->mem_64bit_ranges,
-                         entry->base, entry->limit);
-    }
-
-    crs_range_set_free(&temp_range_set);
-
-    aml_append(crs,
-        aml_word_bus_number(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
-                            0,
-                            pci_bus_num(host->bus),
-                            max_bus,
-                            0,
-                            max_bus - pci_bus_num(host->bus) + 1));
-
-    return crs;
-}
-
 static void build_hpet_aml(Aml *table)
 {
     Aml *crs;
@@ -1582,6 +1293,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
         CPUHotplugFeatures opts = {
             .acpi_1_compatible = true, .has_legacy_cphp = true,
             .smi_path = pm->smi_on_cpuhp ? "\\_SB.PCI0.SMI0.SMIC" : NULL,
+            .fw_unplugs_cpu = pm->smi_on_cpu_unplug,
         };
         build_cpus_aml(dsdt, machine, opts, pm->cpu_hp_io_base,
                        "\\_SB.PCI0", "\\_GPE._E02");
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 70ac837..0cc71e4 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1073,7 +1073,7 @@ static int vtd_iova_to_slpte(IntelIOMMUState *s, VTDContextEntry *ce,
     }
 }
 
-typedef int (*vtd_page_walk_hook)(IOMMUTLBEntry *entry, void *private);
+typedef int (*vtd_page_walk_hook)(IOMMUTLBEvent *event, void *private);
 
 /**
  * Constant information used during page walking
@@ -1094,11 +1094,12 @@ typedef struct {
     uint16_t domain_id;
 } vtd_page_walk_info;
 
-static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
+static int vtd_page_walk_one(IOMMUTLBEvent *event, vtd_page_walk_info *info)
 {
     VTDAddressSpace *as = info->as;
     vtd_page_walk_hook hook_fn = info->hook_fn;
     void *private = info->private;
+    IOMMUTLBEntry *entry = &event->entry;
     DMAMap target = {
         .iova = entry->iova,
         .size = entry->addr_mask,
@@ -1107,7 +1108,7 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
     };
     DMAMap *mapped = iova_tree_find(as->iova_tree, &target);
 
-    if (entry->perm == IOMMU_NONE && !info->notify_unmap) {
+    if (event->type == IOMMU_NOTIFIER_UNMAP && !info->notify_unmap) {
         trace_vtd_page_walk_one_skip_unmap(entry->iova, entry->addr_mask);
         return 0;
     }
@@ -1115,7 +1116,7 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
     assert(hook_fn);
 
     /* Update local IOVA mapped ranges */
-    if (entry->perm) {
+    if (event->type == IOMMU_NOTIFIER_MAP) {
         if (mapped) {
             /* If it's exactly the same translation, skip */
             if (!memcmp(mapped, &target, sizeof(target))) {
@@ -1141,19 +1142,21 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
                 int ret;
 
                 /* Emulate an UNMAP */
+                event->type = IOMMU_NOTIFIER_UNMAP;
                 entry->perm = IOMMU_NONE;
                 trace_vtd_page_walk_one(info->domain_id,
                                         entry->iova,
                                         entry->translated_addr,
                                         entry->addr_mask,
                                         entry->perm);
-                ret = hook_fn(entry, private);
+                ret = hook_fn(event, private);
                 if (ret) {
                     return ret;
                 }
                 /* Drop any existing mapping */
                 iova_tree_remove(as->iova_tree, &target);
-                /* Recover the correct permission */
+                /* Recover the correct type */
+                event->type = IOMMU_NOTIFIER_MAP;
                 entry->perm = cache_perm;
             }
         }
@@ -1170,7 +1173,7 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
     trace_vtd_page_walk_one(info->domain_id, entry->iova,
                             entry->translated_addr, entry->addr_mask,
                             entry->perm);
-    return hook_fn(entry, private);
+    return hook_fn(event, private);
 }
 
 /**
@@ -1191,7 +1194,7 @@ static int vtd_page_walk_level(dma_addr_t addr, uint64_t start,
     uint32_t offset;
     uint64_t slpte;
     uint64_t subpage_size, subpage_mask;
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
     uint64_t iova = start;
     uint64_t iova_next;
     int ret = 0;
@@ -1245,13 +1248,15 @@ static int vtd_page_walk_level(dma_addr_t addr, uint64_t start,
              *
              * In either case, we send an IOTLB notification down.
              */
-            entry.target_as = &address_space_memory;
-            entry.iova = iova & subpage_mask;
-            entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur);
-            entry.addr_mask = ~subpage_mask;
+            event.entry.target_as = &address_space_memory;
+            event.entry.iova = iova & subpage_mask;
+            event.entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur);
+            event.entry.addr_mask = ~subpage_mask;
             /* NOTE: this is only meaningful if entry_valid == true */
-            entry.translated_addr = vtd_get_slpte_addr(slpte, info->aw);
-            ret = vtd_page_walk_one(&entry, info);
+            event.entry.translated_addr = vtd_get_slpte_addr(slpte, info->aw);
+            event.type = event.entry.perm ? IOMMU_NOTIFIER_MAP :
+                                            IOMMU_NOTIFIER_UNMAP;
+            ret = vtd_page_walk_one(&event, info);
         }
 
         if (ret < 0) {
@@ -1430,10 +1435,10 @@ static int vtd_dev_to_context_entry(IntelIOMMUState *s, uint8_t bus_num,
     return 0;
 }
 
-static int vtd_sync_shadow_page_hook(IOMMUTLBEntry *entry,
+static int vtd_sync_shadow_page_hook(IOMMUTLBEvent *event,
                                      void *private)
 {
-    memory_region_notify_iommu((IOMMUMemoryRegion *)private, 0, *entry);
+    memory_region_notify_iommu(private, 0, *event);
     return 0;
 }
 
@@ -1473,6 +1478,10 @@ static int vtd_sync_shadow_page_table(VTDAddressSpace *vtd_as)
     VTDContextEntry ce;
     IOMMUNotifier *n;
 
+    if (!(vtd_as->iommu.iommu_notify_flags & IOMMU_NOTIFIER_IOTLB_EVENTS)) {
+        return 0;
+    }
+
     ret = vtd_dev_to_context_entry(vtd_as->iommu_state,
                                    pci_bus_num(vtd_as->bus),
                                    vtd_as->devfn, &ce);
@@ -1993,14 +2002,17 @@ static void vtd_iotlb_page_invalidate_notify(IntelIOMMUState *s,
                  * page tables.  We just deliver the PSI down to
                  * invalidate caches.
                  */
-                IOMMUTLBEntry entry = {
-                    .target_as = &address_space_memory,
-                    .iova = addr,
-                    .translated_addr = 0,
-                    .addr_mask = size - 1,
-                    .perm = IOMMU_NONE,
+                IOMMUTLBEvent event = {
+                    .type = IOMMU_NOTIFIER_UNMAP,
+                    .entry = {
+                        .target_as = &address_space_memory,
+                        .iova = addr,
+                        .translated_addr = 0,
+                        .addr_mask = size - 1,
+                        .perm = IOMMU_NONE,
+                    },
                 };
-                memory_region_notify_iommu(&vtd_as->iommu, 0, entry);
+                memory_region_notify_iommu(&vtd_as->iommu, 0, event);
             }
         }
     }
@@ -2412,7 +2424,7 @@ static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s,
                                           VTDInvDesc *inv_desc)
 {
     VTDAddressSpace *vtd_dev_as;
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
     struct VTDBus *vtd_bus;
     hwaddr addr;
     uint64_t sz;
@@ -2460,12 +2472,13 @@ static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s,
         sz = VTD_PAGE_SIZE;
     }
 
-    entry.target_as = &vtd_dev_as->as;
-    entry.addr_mask = sz - 1;
-    entry.iova = addr;
-    entry.perm = IOMMU_NONE;
-    entry.translated_addr = 0;
-    memory_region_notify_iommu(&vtd_dev_as->iommu, 0, entry);
+    event.type = IOMMU_NOTIFIER_DEVIOTLB_UNMAP;
+    event.entry.target_as = &vtd_dev_as->as;
+    event.entry.addr_mask = sz - 1;
+    event.entry.iova = addr;
+    event.entry.perm = IOMMU_NONE;
+    event.entry.translated_addr = 0;
+    memory_region_notify_iommu(&vtd_dev_as->iommu, 0, event);
 
 done:
     return true;
@@ -3485,19 +3498,20 @@ static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n)
     size = remain = end - start + 1;
 
     while (remain >= VTD_PAGE_SIZE) {
-        IOMMUTLBEntry entry;
+        IOMMUTLBEvent event;
         uint64_t mask = get_naturally_aligned_size(start, remain, s->aw_bits);
 
         assert(mask);
 
-        entry.iova = start;
-        entry.addr_mask = mask - 1;
-        entry.target_as = &address_space_memory;
-        entry.perm = IOMMU_NONE;
+        event.type = IOMMU_NOTIFIER_UNMAP;
+        event.entry.iova = start;
+        event.entry.addr_mask = mask - 1;
+        event.entry.target_as = &address_space_memory;
+        event.entry.perm = IOMMU_NONE;
         /* This field is meaningless for unmap */
-        entry.translated_addr = 0;
+        event.entry.translated_addr = 0;
 
-        memory_region_notify_one(n, &entry);
+        memory_region_notify_iommu_one(n, &event);
 
         start += mask;
         remain -= mask;
@@ -3533,9 +3547,9 @@ static void vtd_address_space_refresh_all(IntelIOMMUState *s)
     vtd_switch_address_space_all(s);
 }
 
-static int vtd_replay_hook(IOMMUTLBEntry *entry, void *private)
+static int vtd_replay_hook(IOMMUTLBEvent *event, void *private)
 {
-    memory_region_notify_one((IOMMUNotifier *)private, entry);
+    memory_region_notify_iommu_one(private, event);
     return 0;
 }
 
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 17b514d..9e29f37 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -97,6 +97,11 @@
 #include "trace.h"
 #include CONFIG_DEVICES
 
+GlobalProperty pc_compat_5_2[] = {
+    { "ICH9-LPC", "x-smi-cpu-hotunplug", "off" },
+};
+const size_t pc_compat_5_2_len = G_N_ELEMENTS(pc_compat_5_2);
+
 GlobalProperty pc_compat_5_1[] = {
     { "ICH9-LPC", "x-smi-cpu-hotplug", "off" },
 };
@@ -777,27 +782,11 @@ void pc_machine_done(Notifier *notifier, void *data)
     PCMachineState *pcms = container_of(notifier,
                                         PCMachineState, machine_done);
     X86MachineState *x86ms = X86_MACHINE(pcms);
-    PCIBus *bus = pcms->bus;
 
     /* set the number of CPUs */
     x86_rtc_set_cpus_count(x86ms->rtc, x86ms->boot_cpus);
 
-    if (bus) {
-        int extra_hosts = 0;
-
-        QLIST_FOREACH(bus, &bus->child, sibling) {
-            /* look for expander root buses */
-            if (pci_bus_is_root(bus)) {
-                extra_hosts++;
-            }
-        }
-        if (extra_hosts && x86ms->fw_cfg) {
-            uint64_t *val = g_malloc(sizeof(*val));
-            *val = cpu_to_le64(extra_hosts);
-            fw_cfg_add_file(x86ms->fw_cfg,
-                    "etc/extra-pci-roots", val, sizeof(*val));
-        }
-    }
+    fw_cfg_add_extra_pci_roots(pcms->bus, x86ms->fw_cfg);
 
     acpi_setup();
     if (x86ms->fw_cfg) {
@@ -1582,6 +1571,50 @@ static void pc_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
     pcms->max_ram_below_4g = value;
 }
 
+static void pc_machine_get_max_fw_size(Object *obj, Visitor *v,
+                                       const char *name, void *opaque,
+                                       Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(obj);
+    uint64_t value = pcms->max_fw_size;
+
+    visit_type_size(v, name, &value, errp);
+}
+
+static void pc_machine_set_max_fw_size(Object *obj, Visitor *v,
+                                       const char *name, void *opaque,
+                                       Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(obj);
+    Error *error = NULL;
+    uint64_t value;
+
+    visit_type_size(v, name, &value, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+
+    /*
+    * We don't have a theoretically justifiable exact lower bound on the base
+    * address of any flash mapping. In practice, the IO-APIC MMIO range is
+    * [0xFEE00000..0xFEE01000] -- see IO_APIC_DEFAULT_ADDRESS --, leaving free
+    * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in
+    * size.
+    */
+    if (value > 16 * MiB) {
+        error_setg(errp,
+                   "User specified max allowed firmware size %" PRIu64 " is "
+                   "greater than 16MiB. If combined firwmare size exceeds "
+                   "16MiB the system may not boot, or experience intermittent"
+                   "stability issues.",
+                   value);
+        return;
+    }
+
+    pcms->max_fw_size = value;
+}
+
 static void pc_machine_initfn(Object *obj)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
@@ -1597,6 +1630,7 @@ static void pc_machine_initfn(Object *obj)
     pcms->smbus_enabled = true;
     pcms->sata_enabled = true;
     pcms->pit_enabled = true;
+    pcms->max_fw_size = 8 * MiB;
 #ifdef CONFIG_HPET
     pcms->hpet_enabled = true;
 #endif
@@ -1723,6 +1757,12 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
 
     object_class_property_add_bool(oc, "hpet",
         pc_machine_get_hpet, pc_machine_set_hpet);
+
+    object_class_property_add(oc, PC_MACHINE_MAX_FW_SIZE, "size",
+        pc_machine_get_max_fw_size, pc_machine_set_max_fw_size,
+        NULL, NULL);
+    object_class_property_set_description(oc, PC_MACHINE_MAX_FW_SIZE,
+        "Maximum combined firmware size");
 }
 
 static const TypeInfo pc_machine_info = {
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 13d1628..6188c3e 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -426,7 +426,7 @@ static void pc_i440fx_machine_options(MachineClass *m)
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
 }
 
-static void pc_i440fx_5_2_machine_options(MachineClass *m)
+static void pc_i440fx_6_0_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_i440fx_machine_options(m);
@@ -435,6 +435,18 @@ static void pc_i440fx_5_2_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_I440FX_MACHINE(v6_0, "pc-i440fx-6.0", NULL,
+                      pc_i440fx_6_0_machine_options);
+
+static void pc_i440fx_5_2_machine_options(MachineClass *m)
+{
+    pc_i440fx_6_0_machine_options(m);
+    m->alias = NULL;
+    m->is_default = false;
+    compat_props_add(m->compat_props, hw_compat_5_2, hw_compat_5_2_len);
+    compat_props_add(m->compat_props, pc_compat_5_2, pc_compat_5_2_len);
+}
+
 DEFINE_I440FX_MACHINE(v5_2, "pc-i440fx-5.2", NULL,
                       pc_i440fx_5_2_machine_options);
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index a3f4959..0a21244 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -344,7 +344,7 @@ static void pc_q35_machine_options(MachineClass *m)
     m->max_cpus = 288;
 }
 
-static void pc_q35_5_2_machine_options(MachineClass *m)
+static void pc_q35_6_0_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_machine_options(m);
@@ -352,6 +352,17 @@ static void pc_q35_5_2_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_Q35_MACHINE(v6_0, "pc-q35-6.0", NULL,
+                   pc_q35_6_0_machine_options);
+
+static void pc_q35_5_2_machine_options(MachineClass *m)
+{
+    pc_q35_6_0_machine_options(m);
+    m->alias = NULL;
+    compat_props_add(m->compat_props, hw_compat_5_2, hw_compat_5_2_len);
+    compat_props_add(m->compat_props, pc_compat_5_2, pc_compat_5_2_len);
+}
+
 DEFINE_Q35_MACHINE(v5_2, "pc-q35-5.2", NULL,
                    pc_q35_5_2_machine_options);
 
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index b6c0822..f8bd3a8 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -39,15 +39,6 @@
 #include "hw/block/flash.h"
 #include "sysemu/kvm.h"
 
-/*
- * We don't have a theoretically justifiable exact lower bound on the base
- * address of any flash mapping. In practice, the IO-APIC MMIO range is
- * [0xFEE00000..0xFEE01000] -- see IO_APIC_DEFAULT_ADDRESS --, leaving free
- * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in
- * size.
- */
-#define FLASH_SIZE_LIMIT (8 * MiB)
-
 #define FLASH_SECTOR_SIZE 4096
 
 static void pc_isa_bios_init(MemoryRegion *rom_memory,
@@ -140,7 +131,7 @@ void pc_system_flash_cleanup_unused(PCMachineState *pcms)
  * Stop at the first pcms->flash[0] lacking a block backend.
  * Set each flash's size from its block backend.  Fatal error if the
  * size isn't a non-zero multiple of 4KiB, or the total size exceeds
- * FLASH_SIZE_LIMIT.
+ * pcms->max_fw_size.
  *
  * If pcms->flash[0] has a block backend, its memory is passed to
  * pc_isa_bios_init().  Merging several flash devices for isa-bios is
@@ -182,10 +173,10 @@ static void pc_system_flash_map(PCMachineState *pcms,
         }
         if ((hwaddr)size != size
             || total_size > HWADDR_MAX - size
-            || total_size + size > FLASH_SIZE_LIMIT) {
+            || total_size + size > pcms->max_fw_size) {
             error_report("combined size of system firmware exceeds "
                          "%" PRIu64 " bytes",
-                         FLASH_SIZE_LIMIT);
+                         pcms->max_fw_size);
             exit(1);
         }
 
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index 087a18d..d3145bf 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -366,6 +366,7 @@ static void smi_features_ok_callback(void *opaque)
 {
     ICH9LPCState *lpc = opaque;
     uint64_t guest_features;
+    uint64_t guest_cpu_hotplug_features;
 
     if (lpc->smi_features_ok) {
         /* negotiation already complete, features locked */
@@ -378,9 +379,12 @@ static void smi_features_ok_callback(void *opaque)
         /* guest requests invalid features, leave @features_ok at zero */
         return;
     }
+
+    guest_cpu_hotplug_features = guest_features &
+                                 (BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT) |
+                                  BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT));
     if (!(guest_features & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT)) &&
-        guest_features & (BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT) |
-                          BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT))) {
+        guest_cpu_hotplug_features) {
         /*
          * cpu hot-[un]plug with SMI requires SMI broadcast,
          * leave @features_ok at zero
@@ -388,6 +392,12 @@ static void smi_features_ok_callback(void *opaque)
         return;
     }
 
+    if (guest_cpu_hotplug_features ==
+        BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT)) {
+        /* cpu hot-unplug is unsupported without cpu-hotplug */
+        return;
+    }
+
     /* valid feature subset requested, lock it down, report success */
     lpc->smi_negotiated_features = guest_features;
     lpc->smi_features_ok = 1;
@@ -770,7 +780,7 @@ static Property ich9_lpc_properties[] = {
     DEFINE_PROP_BIT64("x-smi-cpu-hotplug", ICH9LPCState, smi_host_features,
                       ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, true),
     DEFINE_PROP_BIT64("x-smi-cpu-hotunplug", ICH9LPCState, smi_host_features,
-                      ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT, false),
+                      ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/misc/tz-mpc.c b/hw/misc/tz-mpc.c
index 98f1512..30481e1 100644
--- a/hw/misc/tz-mpc.c
+++ b/hw/misc/tz-mpc.c
@@ -82,8 +82,10 @@ static void tz_mpc_iommu_notify(TZMPC *s, uint32_t lutidx,
     /* Called when the LUT word at lutidx has changed from oldlut to newlut;
      * must call the IOMMU notifiers for the changed blocks.
      */
-    IOMMUTLBEntry entry = {
-        .addr_mask = s->blocksize - 1,
+    IOMMUTLBEvent event = {
+        .entry = {
+            .addr_mask = s->blocksize - 1,
+        }
     };
     hwaddr addr = lutidx * s->blocksize * 32;
     int i;
@@ -100,26 +102,28 @@ static void tz_mpc_iommu_notify(TZMPC *s, uint32_t lutidx,
         block_is_ns = newlut & (1 << i);
 
         trace_tz_mpc_iommu_notify(addr);
-        entry.iova = addr;
-        entry.translated_addr = addr;
+        event.entry.iova = addr;
+        event.entry.translated_addr = addr;
 
-        entry.perm = IOMMU_NONE;
-        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, entry);
-        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, entry);
+        event.type = IOMMU_NOTIFIER_UNMAP;
+        event.entry.perm = IOMMU_NONE;
+        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, event);
+        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, event);
 
-        entry.perm = IOMMU_RW;
+        event.type = IOMMU_NOTIFIER_MAP;
+        event.entry.perm = IOMMU_RW;
         if (block_is_ns) {
-            entry.target_as = &s->blocked_io_as;
+            event.entry.target_as = &s->blocked_io_as;
         } else {
-            entry.target_as = &s->downstream_as;
+            event.entry.target_as = &s->downstream_as;
         }
-        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, entry);
+        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, event);
         if (block_is_ns) {
-            entry.target_as = &s->downstream_as;
+            event.entry.target_as = &s->downstream_as;
         } else {
-            entry.target_as = &s->blocked_io_as;
+            event.entry.target_as = &s->blocked_io_as;
         }
-        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, entry);
+        memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, event);
     }
 }
 
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 9179013..044ac95 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -788,93 +788,95 @@ static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n)
     return virtio_net_guest_offloads_by_features(vdev->guest_features);
 }
 
-static void failover_add_primary(VirtIONet *n, Error **errp)
-{
-    Error *err = NULL;
-
-    if (n->primary_dev) {
-        return;
-    }
-
-    n->primary_device_opts = qemu_opts_find(qemu_find_opts("device"),
-            n->primary_device_id);
-    if (n->primary_device_opts) {
-        n->primary_dev = qdev_device_add(n->primary_device_opts, &err);
-        if (err) {
-            qemu_opts_del(n->primary_device_opts);
-        }
-        if (n->primary_dev) {
-            n->primary_bus = n->primary_dev->parent_bus;
-            if (err) {
-                qdev_unplug(n->primary_dev, &err);
-                qdev_set_id(n->primary_dev, "");
-
-            }
-        }
-    } else {
-        error_setg(errp, "Primary device not found");
-        error_append_hint(errp, "Virtio-net failover will not work. Make "
-            "sure primary device has parameter"
-            " failover_pair_id=<virtio-net-id>\n");
-}
-    error_propagate(errp, err);
-}
+typedef struct {
+    VirtIONet *n;
+    char *id;
+} FailoverId;
 
-static int is_my_primary(void *opaque, QemuOpts *opts, Error **errp)
+/**
+ * Set the id of the failover primary device
+ *
+ * @opaque: FailoverId to setup
+ * @opts: opts for device we are handling
+ * @errp: returns an error if this function fails
+ */
+static int failover_set_primary(void *opaque, QemuOpts *opts, Error **errp)
 {
-    VirtIONet *n = opaque;
-    int ret = 0;
-
+    FailoverId *fid = opaque;
     const char *standby_id = qemu_opt_get(opts, "failover_pair_id");
 
-    if (standby_id != NULL && (g_strcmp0(standby_id, n->netclient_name) == 0)) {
-        n->primary_device_id = g_strdup(opts->id);
-        ret = 1;
+    if (g_strcmp0(standby_id, fid->n->netclient_name) == 0) {
+        fid->id = g_strdup(opts->id);
+        return 1;
     }
 
-    return ret;
+    return 0;
 }
 
-static DeviceState *virtio_net_find_primary(VirtIONet *n, Error **errp)
+/**
+ * Find the primary device id for this failover virtio-net
+ *
+ * @n: VirtIONet device
+ * @errp: returns an error if this function fails
+ */
+static char *failover_find_primary_device_id(VirtIONet *n)
 {
-    DeviceState *dev = NULL;
     Error *err = NULL;
+    FailoverId fid;
 
-    if (qemu_opts_foreach(qemu_find_opts("device"),
-                         is_my_primary, n, &err)) {
-        if (err) {
-            error_propagate(errp, err);
-            return NULL;
-        }
-        if (n->primary_device_id) {
-            dev = qdev_find_recursive(sysbus_get_default(),
-                    n->primary_device_id);
-        } else {
-            error_setg(errp, "Primary device id not found");
-            return NULL;
-        }
+    fid.n = n;
+    if (!qemu_opts_foreach(qemu_find_opts("device"),
+                           failover_set_primary, &fid, &err)) {
+        return NULL;
     }
-    return dev;
+    return fid.id;
 }
 
+/**
+ * Find the primary device for this failover virtio-net
+ *
+ * @n: VirtIONet device
+ * @errp: returns an error if this function fails
+ */
+static DeviceState *failover_find_primary_device(VirtIONet *n)
+{
+    char *id = failover_find_primary_device_id(n);
+
+    if (!id) {
+        return NULL;
+    }
 
+    return qdev_find_recursive(sysbus_get_default(), id);
+}
 
-static DeviceState *virtio_connect_failover_devices(VirtIONet *n,
-                                                    DeviceState *dev,
-                                                    Error **errp)
+static void failover_add_primary(VirtIONet *n, Error **errp)
 {
-    DeviceState *prim_dev = NULL;
     Error *err = NULL;
+    QemuOpts *opts;
+    char *id;
+    DeviceState *dev = failover_find_primary_device(n);
 
-    prim_dev = virtio_net_find_primary(n, &err);
-    if (prim_dev) {
-        n->primary_device_id = g_strdup(prim_dev->id);
-        n->primary_device_opts = prim_dev->opts;
-    } else {
-        error_propagate(errp, err);
+    if (dev) {
+        return;
     }
 
-    return prim_dev;
+    id = failover_find_primary_device_id(n);
+    if (!id) {
+        return;
+    }
+    opts = qemu_opts_find(qemu_find_opts("device"), id);
+    if (opts) {
+        dev = qdev_device_add(opts, &err);
+        if (err) {
+            qemu_opts_del(opts);
+        }
+    } else {
+        error_setg(errp, "Primary device not found");
+        error_append_hint(errp, "Virtio-net failover will not work. Make "
+                          "sure primary device has parameter"
+                          " failover_pair_id=<virtio-net-id>\n");
+    }
+    error_propagate(errp, err);
 }
 
 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
@@ -929,25 +931,12 @@ static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
 
     if (virtio_has_feature(features, VIRTIO_NET_F_STANDBY)) {
         qapi_event_send_failover_negotiated(n->netclient_name);
-        qatomic_set(&n->primary_should_be_hidden, false);
+        qatomic_set(&n->failover_primary_hidden, false);
         failover_add_primary(n, &err);
         if (err) {
-            n->primary_dev = virtio_connect_failover_devices(n, n->qdev, &err);
-            if (err) {
-                goto out_err;
-            }
-            failover_add_primary(n, &err);
-            if (err) {
-                goto out_err;
-            }
+            warn_report_err(err);
         }
     }
-    return;
-
-out_err:
-    if (err) {
-        warn_report_err(err);
-    }
 }
 
 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
@@ -3095,17 +3084,17 @@ void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
     n->netclient_type = g_strdup(type);
 }
 
-static bool failover_unplug_primary(VirtIONet *n)
+static bool failover_unplug_primary(VirtIONet *n, DeviceState *dev)
 {
     HotplugHandler *hotplug_ctrl;
     PCIDevice *pci_dev;
     Error *err = NULL;
 
-    hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
+    hotplug_ctrl = qdev_get_hotplug_handler(dev);
     if (hotplug_ctrl) {
-        pci_dev = PCI_DEVICE(n->primary_dev);
+        pci_dev = PCI_DEVICE(dev);
         pci_dev->partially_hotplugged = true;
-        hotplug_handler_unplug_request(hotplug_ctrl, n->primary_dev, &err);
+        hotplug_handler_unplug_request(hotplug_ctrl, dev, &err);
         if (err) {
             error_report_err(err);
             return false;
@@ -3116,41 +3105,31 @@ static bool failover_unplug_primary(VirtIONet *n)
     return true;
 }
 
-static bool failover_replug_primary(VirtIONet *n, Error **errp)
+static bool failover_replug_primary(VirtIONet *n, DeviceState *dev,
+                                    Error **errp)
 {
     Error *err = NULL;
     HotplugHandler *hotplug_ctrl;
-    PCIDevice *pdev = PCI_DEVICE(n->primary_dev);
+    PCIDevice *pdev = PCI_DEVICE(dev);
+    BusState *primary_bus;
 
     if (!pdev->partially_hotplugged) {
         return true;
     }
-    if (!n->primary_device_opts) {
-        n->primary_device_opts = qemu_opts_from_qdict(
-                qemu_find_opts("device"),
-                n->primary_device_dict, errp);
-        if (!n->primary_device_opts) {
-            return false;
-        }
-    }
-    n->primary_bus = n->primary_dev->parent_bus;
-    if (!n->primary_bus) {
+    primary_bus = dev->parent_bus;
+    if (!primary_bus) {
         error_setg(errp, "virtio_net: couldn't find primary bus");
         return false;
     }
-    qdev_set_parent_bus(n->primary_dev, n->primary_bus, &error_abort);
-    n->primary_should_be_hidden = false;
-    if (!qemu_opt_set_bool(n->primary_device_opts,
-                           "partially_hotplugged", true, errp)) {
-        return false;
-    }
-    hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
+    qdev_set_parent_bus(dev, primary_bus, &error_abort);
+    qatomic_set(&n->failover_primary_hidden, false);
+    hotplug_ctrl = qdev_get_hotplug_handler(dev);
     if (hotplug_ctrl) {
-        hotplug_handler_pre_plug(hotplug_ctrl, n->primary_dev, &err);
+        hotplug_handler_pre_plug(hotplug_ctrl, dev, &err);
         if (err) {
             goto out;
         }
-        hotplug_handler_plug(hotplug_ctrl, n->primary_dev, &err);
+        hotplug_handler_plug(hotplug_ctrl, dev, &err);
     }
 
 out:
@@ -3158,34 +3137,29 @@ out:
     return !err;
 }
 
-static void virtio_net_handle_migration_primary(VirtIONet *n,
-                                                MigrationState *s)
+static void virtio_net_handle_migration_primary(VirtIONet *n, MigrationState *s)
 {
     bool should_be_hidden;
     Error *err = NULL;
+    DeviceState *dev = failover_find_primary_device(n);
 
-    should_be_hidden = qatomic_read(&n->primary_should_be_hidden);
-
-    if (!n->primary_dev) {
-        n->primary_dev = virtio_connect_failover_devices(n, n->qdev, &err);
-        if (!n->primary_dev) {
-            return;
-        }
+    if (!dev) {
+        return;
     }
 
+    should_be_hidden = qatomic_read(&n->failover_primary_hidden);
+
     if (migration_in_setup(s) && !should_be_hidden) {
-        if (failover_unplug_primary(n)) {
-            vmstate_unregister(VMSTATE_IF(n->primary_dev),
-                    qdev_get_vmsd(n->primary_dev),
-                    n->primary_dev);
-            qapi_event_send_unplug_primary(n->primary_device_id);
-            qatomic_set(&n->primary_should_be_hidden, true);
+        if (failover_unplug_primary(n, dev)) {
+            vmstate_unregister(VMSTATE_IF(dev), qdev_get_vmsd(dev), dev);
+            qapi_event_send_unplug_primary(dev->id);
+            qatomic_set(&n->failover_primary_hidden, true);
         } else {
             warn_report("couldn't unplug primary device");
         }
     } else if (migration_has_failed(s)) {
         /* We already unplugged the device let's plug it back */
-        if (!failover_replug_primary(n, &err)) {
+        if (!failover_replug_primary(n, dev, &err)) {
             if (err) {
                 error_report_err(err);
             }
@@ -3200,55 +3174,22 @@ static void virtio_net_migration_state_notifier(Notifier *notifier, void *data)
     virtio_net_handle_migration_primary(n, s);
 }
 
-static int virtio_net_primary_should_be_hidden(DeviceListener *listener,
-            QemuOpts *device_opts)
+static bool failover_hide_primary_device(DeviceListener *listener,
+                                         QemuOpts *device_opts)
 {
     VirtIONet *n = container_of(listener, VirtIONet, primary_listener);
-    bool match_found = false;
-    bool hide = false;
+    const char *standby_id;
 
     if (!device_opts) {
-        return -1;
-    }
-    n->primary_device_dict = qemu_opts_to_qdict(device_opts,
-            n->primary_device_dict);
-    if (n->primary_device_dict) {
-        g_free(n->standby_id);
-        n->standby_id = g_strdup(qdict_get_try_str(n->primary_device_dict,
-                    "failover_pair_id"));
-    }
-    if (g_strcmp0(n->standby_id, n->netclient_name) == 0) {
-        match_found = true;
-    } else {
-        match_found = false;
-        hide = false;
-        g_free(n->standby_id);
-        n->primary_device_dict = NULL;
-        goto out;
+        return false;
     }
-
-    n->primary_device_opts = device_opts;
-
-    /* primary_should_be_hidden is set during feature negotiation */
-    hide = qatomic_read(&n->primary_should_be_hidden);
-
-    if (n->primary_device_dict) {
-        g_free(n->primary_device_id);
-        n->primary_device_id = g_strdup(qdict_get_try_str(
-                    n->primary_device_dict, "id"));
-        if (!n->primary_device_id) {
-            warn_report("primary_device_id not set");
-        }
+    standby_id = qemu_opt_get(device_opts, "failover_pair_id");
+    if (g_strcmp0(standby_id, n->netclient_name) != 0) {
+        return false;
     }
 
-out:
-    if (match_found && hide) {
-        return 1;
-    } else if (match_found && !hide) {
-        return 0;
-    } else {
-        return -1;
-    }
+    /* failover_primary_hidden is set during feature negotiation */
+    return qatomic_read(&n->failover_primary_hidden);
 }
 
 static void virtio_net_device_realize(DeviceState *dev, Error **errp)
@@ -3285,9 +3226,8 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
     }
 
     if (n->failover) {
-        n->primary_listener.should_be_hidden =
-            virtio_net_primary_should_be_hidden;
-        qatomic_set(&n->primary_should_be_hidden, true);
+        n->primary_listener.hide_device = failover_hide_primary_device;
+        qatomic_set(&n->failover_primary_hidden, true);
         device_listener_register(&n->primary_listener);
         n->migration_state.notify = virtio_net_migration_state_notifier;
         add_migration_state_change_notifier(&n->migration_state);
@@ -3426,10 +3366,6 @@ static void virtio_net_device_unrealize(DeviceState *dev)
 
     if (n->failover) {
         device_listener_unregister(&n->primary_listener);
-        g_free(n->primary_device_id);
-        g_free(n->standby_id);
-        qobject_unref(n->primary_device_dict);
-        n->primary_device_dict = NULL;
     }
 
     max_queues = n->multiqueue ? n->max_queues : 1;
@@ -3475,13 +3411,15 @@ static int virtio_net_pre_save(void *opaque)
 static bool primary_unplug_pending(void *opaque)
 {
     DeviceState *dev = opaque;
+    DeviceState *primary;
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIONet *n = VIRTIO_NET(vdev);
 
     if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_STANDBY)) {
         return false;
     }
-    return n->primary_dev ? n->primary_dev->pending_deleted_event : false;
+    primary = failover_find_primary_device(n);
+    return primary ? primary->pending_deleted_event : false;
 }
 
 static bool dev_unplug_pending(void *opaque)
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 08539a1..282ba93 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -40,6 +40,7 @@
 #include "qemu/cutils.h"
 #include "qapi/error.h"
 #include "hw/acpi/aml-build.h"
+#include "hw/pci/pci_bus.h"
 
 #define FW_CFG_FILE_SLOTS_DFLT 0x20
 
@@ -1061,6 +1062,28 @@ bool fw_cfg_add_from_generator(FWCfgState *s, const char *filename,
     return true;
 }
 
+void fw_cfg_add_extra_pci_roots(PCIBus *bus, FWCfgState *s)
+{
+    int extra_hosts = 0;
+
+    if (!bus) {
+        return;
+    }
+
+    QLIST_FOREACH(bus, &bus->child, sibling) {
+        /* look for expander root buses */
+        if (pci_bus_is_root(bus)) {
+            extra_hosts++;
+        }
+    }
+
+    if (extra_hosts && s) {
+        uint64_t *val = g_malloc(sizeof(*val));
+        *val = cpu_to_le64(extra_hosts);
+        fw_cfg_add_file(s, "etc/extra-pci-roots", val, sizeof(*val));
+    }
+}
+
 static void fw_cfg_machine_reset(void *opaque)
 {
     MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
diff --git a/hw/pci-host/gpex-acpi.c b/hw/pci-host/gpex-acpi.c
index dbb350a..7f20ee1 100644
--- a/hw/pci-host/gpex-acpi.c
+++ b/hw/pci-host/gpex-acpi.c
@@ -1,22 +1,16 @@
 #include "qemu/osdep.h"
 #include "hw/acpi/aml-build.h"
 #include "hw/pci-host/gpex.h"
+#include "hw/arm/virt.h"
+#include "hw/pci/pci_bus.h"
+#include "hw/pci/pci_bridge.h"
+#include "hw/pci/pcie_host.h"
 
-void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
+static void acpi_dsdt_add_pci_route_table(Aml *dev, uint32_t irq)
 {
-    int nr_pcie_buses = cfg->ecam.size / PCIE_MMCFG_SIZE_MIN;
-    Aml *method, *crs, *ifctx, *UUID, *ifctx1, *elsectx, *buf;
+    Aml *method, *crs;
     int i, slot_no;
 
-    Aml *dev = aml_device("%s", "PCI0");
-    aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A08")));
-    aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
-    aml_append(dev, aml_name_decl("_SEG", aml_int(0)));
-    aml_append(dev, aml_name_decl("_BBN", aml_int(0)));
-    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
-    aml_append(dev, aml_name_decl("_STR", aml_unicode("PCIe 0 Device")));
-    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
-
     /* Declare the PCI Routing Table. */
     Aml *rt_pkg = aml_varpackage(PCI_SLOT_MAX * PCI_NUM_PINS);
     for (slot_no = 0; slot_no < PCI_SLOT_MAX; slot_no++) {
@@ -34,7 +28,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
 
     /* Create GSI link device */
     for (i = 0; i < PCI_NUM_PINS; i++) {
-        uint32_t irqs = cfg->irq + i;
+        uint32_t irqs = irq + i;
         Aml *dev_gsi = aml_device("GSI%d", i);
         aml_append(dev_gsi, aml_name_decl("_HID", aml_string("PNP0C0F")));
         aml_append(dev_gsi, aml_name_decl("_UID", aml_int(i)));
@@ -52,43 +46,11 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
         aml_append(dev_gsi, method);
         aml_append(dev, dev_gsi);
     }
+}
 
-    method = aml_method("_CBA", 0, AML_NOTSERIALIZED);
-    aml_append(method, aml_return(aml_int(cfg->ecam.base)));
-    aml_append(dev, method);
-
-    Aml *rbuf = aml_resource_template();
-    aml_append(rbuf,
-        aml_word_bus_number(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
-                            0x0000, 0x0000, nr_pcie_buses - 1, 0x0000,
-                            nr_pcie_buses));
-    if (cfg->mmio32.size) {
-        aml_append(rbuf,
-                   aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
-                                    AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
-                                    cfg->mmio32.base,
-                                    cfg->mmio32.base + cfg->mmio32.size - 1,
-                                    0x0000,
-                                    cfg->mmio32.size));
-    }
-    if (cfg->pio.size) {
-        aml_append(rbuf,
-                   aml_dword_io(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
-                                AML_ENTIRE_RANGE, 0x0000, 0x0000,
-                                cfg->pio.size - 1,
-                                cfg->pio.base,
-                                cfg->pio.size));
-    }
-    if (cfg->mmio64.size) {
-        aml_append(rbuf,
-                   aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
-                                    AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
-                                    cfg->mmio64.base,
-                                    cfg->mmio64.base + cfg->mmio64.size - 1,
-                                    0x0000,
-                                    cfg->mmio64.size));
-    }
-    aml_append(dev, aml_name_decl("_CRS", rbuf));
+static void acpi_dsdt_add_pci_osc(Aml *dev)
+{
+    Aml *method, *UUID, *ifctx, *ifctx1, *elsectx, *buf;
 
     /* Declare an _OSC (OS Control Handoff) method */
     aml_append(dev, aml_name_decl("SUPP", aml_int(0)));
@@ -160,6 +122,112 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
     buf = aml_buffer(1, byte_list);
     aml_append(method, aml_return(buf));
     aml_append(dev, method);
+}
+
+void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
+{
+    int nr_pcie_buses = cfg->ecam.size / PCIE_MMCFG_SIZE_MIN;
+    Aml *method, *crs, *dev, *rbuf;
+    PCIBus *bus = cfg->bus;
+    CrsRangeSet crs_range_set;
+
+    /* start to construct the tables for pxb */
+    crs_range_set_init(&crs_range_set);
+    if (bus) {
+        QLIST_FOREACH(bus, &bus->child, sibling) {
+            uint8_t bus_num = pci_bus_num(bus);
+            uint8_t numa_node = pci_bus_numa_node(bus);
+
+            if (!pci_bus_is_root(bus)) {
+                continue;
+            }
+
+            /*
+             * 0 - (nr_pcie_buses - 1) is the bus range for the main
+             * host-bridge and it equals the MIN of the
+             * busNr defined for pxb-pcie.
+             */
+            if (bus_num < nr_pcie_buses) {
+                nr_pcie_buses = bus_num;
+            }
+
+            dev = aml_device("PC%.02X", bus_num);
+            aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A08")));
+            aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
+            aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
+            aml_append(dev, aml_name_decl("_UID", aml_int(bus_num)));
+            aml_append(dev, aml_name_decl("_STR", aml_unicode("pxb Device")));
+            if (numa_node != NUMA_NODE_UNASSIGNED) {
+                aml_append(dev, aml_name_decl("_PXM", aml_int(numa_node)));
+            }
+
+            acpi_dsdt_add_pci_route_table(dev, cfg->irq);
+
+            /*
+             * Resources defined for PXBs are composed by the folling parts:
+             * 1. The resources the pci-brige/pcie-root-port need.
+             * 2. The resources the devices behind pxb need.
+             */
+            crs = build_crs(PCI_HOST_BRIDGE(BUS(bus)->parent), &crs_range_set);
+            aml_append(dev, aml_name_decl("_CRS", crs));
+
+            acpi_dsdt_add_pci_osc(dev);
+
+            aml_append(scope, dev);
+        }
+    }
+    crs_range_set_free(&crs_range_set);
+
+    /* tables for the main */
+    dev = aml_device("%s", "PCI0");
+    aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A08")));
+    aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
+    aml_append(dev, aml_name_decl("_SEG", aml_int(0)));
+    aml_append(dev, aml_name_decl("_BBN", aml_int(0)));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+    aml_append(dev, aml_name_decl("_STR", aml_unicode("PCIe 0 Device")));
+    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
+
+    acpi_dsdt_add_pci_route_table(dev, cfg->irq);
+
+    method = aml_method("_CBA", 0, AML_NOTSERIALIZED);
+    aml_append(method, aml_return(aml_int(cfg->ecam.base)));
+    aml_append(dev, method);
+
+    rbuf = aml_resource_template();
+    aml_append(rbuf,
+        aml_word_bus_number(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
+                            0x0000, 0x0000, nr_pcie_buses - 1, 0x0000,
+                            nr_pcie_buses));
+    if (cfg->mmio32.size) {
+        aml_append(rbuf,
+                   aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
+                                    AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
+                                    cfg->mmio32.base,
+                                    cfg->mmio32.base + cfg->mmio32.size - 1,
+                                    0x0000,
+                                    cfg->mmio32.size));
+    }
+    if (cfg->pio.size) {
+        aml_append(rbuf,
+                   aml_dword_io(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
+                                AML_ENTIRE_RANGE, 0x0000, 0x0000,
+                                cfg->pio.size - 1,
+                                cfg->pio.base,
+                                cfg->pio.size));
+    }
+    if (cfg->mmio64.size) {
+        aml_append(rbuf,
+                   aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
+                                    AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
+                                    cfg->mmio64.base,
+                                    cfg->mmio64.base + cfg->mmio64.size - 1,
+                                    0x0000,
+                                    cfg->mmio64.size));
+    }
+    aml_append(dev, aml_name_decl("_CRS", rbuf));
+
+    acpi_dsdt_add_pci_osc(dev);
 
     Aml *dev_res0 = aml_device("%s", "RES0");
     aml_append(dev_res0, aml_name_decl("_HID", aml_string("PNP0C02")));
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 12a012d..c060702 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4510,14 +4510,25 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
     type_init(spapr_machine_register_##suffix)
 
 /*
+ * pseries-6.0
+ */
+static void spapr_machine_6_0_class_options(MachineClass *mc)
+{
+    /* Defaults for the latest behaviour inherited from the base class */
+}
+
+DEFINE_SPAPR_MACHINE(6_0, "6.0", true);
+
+/*
  * pseries-5.2
  */
 static void spapr_machine_5_2_class_options(MachineClass *mc)
 {
-    /* Defaults for the latest behaviour inherited from the base class */
+    spapr_machine_6_0_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_5_2, hw_compat_5_2_len);
 }
 
-DEFINE_SPAPR_MACHINE(5_2, "5.2", true);
+DEFINE_SPAPR_MACHINE(5_2, "5.2", false);
 
 /*
  * pseries-5.1
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index 0790239..30352df 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -445,7 +445,7 @@ static void spapr_tce_reset(DeviceState *dev)
 static target_ulong put_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
                                 target_ulong tce)
 {
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
     hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
     unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift;
 
@@ -457,12 +457,13 @@ static target_ulong put_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
 
     tcet->table[index] = tce;
 
-    entry.target_as = &address_space_memory,
-    entry.iova = (ioba - tcet->bus_offset) & page_mask;
-    entry.translated_addr = tce & page_mask;
-    entry.addr_mask = ~page_mask;
-    entry.perm = spapr_tce_iommu_access_flags(tce);
-    memory_region_notify_iommu(&tcet->iommu, 0, entry);
+    event.entry.target_as = &address_space_memory,
+    event.entry.iova = (ioba - tcet->bus_offset) & page_mask;
+    event.entry.translated_addr = tce & page_mask;
+    event.entry.addr_mask = ~page_mask;
+    event.entry.perm = spapr_tce_iommu_access_flags(tce);
+    event.type = event.entry.perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP;
+    memory_region_notify_iommu(&tcet->iommu, 0, event);
 
     return H_SUCCESS;
 }
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 70bfd91..d9e1e29 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -602,15 +602,18 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
                                       S390IOTLBEntry *entry)
 {
     S390IOTLBEntry *cache = g_hash_table_lookup(iommu->iotlb, &entry->iova);
-    IOMMUTLBEntry notify = {
-        .target_as = &address_space_memory,
-        .iova = entry->iova,
-        .translated_addr = entry->translated_addr,
-        .perm = entry->perm,
-        .addr_mask = ~PAGE_MASK,
+    IOMMUTLBEvent event = {
+        .type = entry->perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP,
+        .entry = {
+            .target_as = &address_space_memory,
+            .iova = entry->iova,
+            .translated_addr = entry->translated_addr,
+            .perm = entry->perm,
+            .addr_mask = ~PAGE_MASK,
+        },
     };
 
-    if (entry->perm == IOMMU_NONE) {
+    if (event.type == IOMMU_NOTIFIER_UNMAP) {
         if (!cache) {
             goto out;
         }
@@ -623,9 +626,11 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
                 goto out;
             }
 
-            notify.perm = IOMMU_NONE;
-            memory_region_notify_iommu(&iommu->iommu_mr, 0, notify);
-            notify.perm = entry->perm;
+            event.type = IOMMU_NOTIFIER_UNMAP;
+            event.entry.perm = IOMMU_NONE;
+            memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
+            event.type = IOMMU_NOTIFIER_MAP;
+            event.entry.perm = entry->perm;
         }
 
         cache = g_new(S390IOTLBEntry, 1);
@@ -637,7 +642,7 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
         dec_dma_avail(iommu);
     }
 
-    memory_region_notify_iommu(&iommu->iommu_mr, 0, notify);
+    memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
 
 out:
     return iommu->dma_limit ? iommu->dma_limit->avail : 1;
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 4e140bb..f0ee8da 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -789,14 +789,26 @@ bool css_migration_enabled(void)
     }                                                                         \
     type_init(ccw_machine_register_##suffix)
 
+static void ccw_machine_6_0_instance_options(MachineState *machine)
+{
+}
+
+static void ccw_machine_6_0_class_options(MachineClass *mc)
+{
+}
+DEFINE_CCW_MACHINE(6_0, "6.0", true);
+
 static void ccw_machine_5_2_instance_options(MachineState *machine)
 {
+    ccw_machine_6_0_instance_options(machine);
 }
 
 static void ccw_machine_5_2_class_options(MachineClass *mc)
 {
+    ccw_machine_6_0_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_5_2, hw_compat_5_2_len);
 }
-DEFINE_CCW_MACHINE(5_2, "5.2", true);
+DEFINE_CCW_MACHINE(5_2, "5.2", false);
 
 static void ccw_machine_5_1_instance_options(MachineState *machine)
 {
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 614ccc2..28c7d78 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -718,7 +718,7 @@ static void vhost_iommu_region_add(MemoryListener *listener,
     iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr,
                                                    MEMTXATTRS_UNSPECIFIED);
     iommu_notifier_init(&iommu->n, vhost_iommu_unmap_notify,
-                        IOMMU_NOTIFIER_UNMAP,
+                        IOMMU_NOTIFIER_DEVIOTLB_UNMAP,
                         section->offset_within_region,
                         int128_get64(end),
                         iommu_idx);
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index fc5c75d..cea8811 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -129,7 +129,7 @@ static void virtio_iommu_notify_map(IOMMUMemoryRegion *mr, hwaddr virt_start,
                                     hwaddr virt_end, hwaddr paddr,
                                     uint32_t flags)
 {
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
     IOMMUAccessFlags perm = IOMMU_ACCESS_FLAG(flags & VIRTIO_IOMMU_MAP_F_READ,
                                               flags & VIRTIO_IOMMU_MAP_F_WRITE);
 
@@ -141,19 +141,20 @@ static void virtio_iommu_notify_map(IOMMUMemoryRegion *mr, hwaddr virt_start,
     trace_virtio_iommu_notify_map(mr->parent_obj.name, virt_start, virt_end,
                                   paddr, perm);
 
-    entry.target_as = &address_space_memory;
-    entry.addr_mask = virt_end - virt_start;
-    entry.iova = virt_start;
-    entry.perm = perm;
-    entry.translated_addr = paddr;
+    event.type = IOMMU_NOTIFIER_MAP;
+    event.entry.target_as = &address_space_memory;
+    event.entry.addr_mask = virt_end - virt_start;
+    event.entry.iova = virt_start;
+    event.entry.perm = perm;
+    event.entry.translated_addr = paddr;
 
-    memory_region_notify_iommu(mr, 0, entry);
+    memory_region_notify_iommu(mr, 0, event);
 }
 
 static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr virt_start,
                                       hwaddr virt_end)
 {
-    IOMMUTLBEntry entry;
+    IOMMUTLBEvent event;
 
     if (!(mr->iommu_notify_flags & IOMMU_NOTIFIER_UNMAP)) {
         return;
@@ -161,13 +162,14 @@ static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr virt_start,
 
     trace_virtio_iommu_notify_unmap(mr->parent_obj.name, virt_start, virt_end);
 
-    entry.target_as = &address_space_memory;
-    entry.addr_mask = virt_end - virt_start;
-    entry.iova = virt_start;
-    entry.perm = IOMMU_NONE;
-    entry.translated_addr = 0;
+    event.type = IOMMU_NOTIFIER_UNMAP;
+    event.entry.target_as = &address_space_memory;
+    event.entry.addr_mask = virt_end - virt_start;
+    event.entry.iova = virt_start;
+    event.entry.perm = IOMMU_NONE;
+    event.entry.translated_addr = 0;
 
-    memory_region_notify_iommu(mr, 0, entry);
+    memory_region_notify_iommu(mr, 0, event);
 }
 
 static gboolean virtio_iommu_notify_unmap_cb(gpointer key, gpointer value,
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 36524a5..f863f69 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1798,6 +1798,7 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
 
     if (pcie_port && pci_is_express(pci_dev)) {
         int pos;
+        uint16_t last_pcie_cap_offset = PCI_CONFIG_SPACE_SIZE;
 
         pos = pcie_endpoint_cap_init(pci_dev, 0);
         assert(pos > 0);
@@ -1816,6 +1817,12 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
          */
         pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
 
+        if (proxy->flags & VIRTIO_PCI_FLAG_AER) {
+            pcie_aer_init(pci_dev, PCI_ERR_VER, last_pcie_cap_offset,
+                          PCI_ERR_SIZEOF, NULL);
+            last_pcie_cap_offset += PCI_ERR_SIZEOF;
+        }
+
         if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
             /* Init error enabling flags */
             pcie_cap_deverr_init(pci_dev);
@@ -1833,7 +1840,8 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
         }
 
         if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
-            pcie_ats_init(pci_dev, 256);
+            pcie_ats_init(pci_dev, last_pcie_cap_offset);
+            last_pcie_cap_offset += PCI_EXT_CAP_ATS_SIZEOF;
         }
 
         if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) {
@@ -1856,7 +1864,15 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
 
 static void virtio_pci_exit(PCIDevice *pci_dev)
 {
+    VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
+    bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
+                     !pci_bus_is_root(pci_get_bus(pci_dev));
+
     msix_uninit_exclusive_bar(pci_dev);
+    if (proxy->flags & VIRTIO_PCI_FLAG_AER && pcie_port &&
+        pci_is_express(pci_dev)) {
+        pcie_aer_exit(pci_dev);
+    }
 }
 
 static void virtio_pci_reset(DeviceState *qdev)
@@ -1909,6 +1925,8 @@ static Property virtio_pci_properties[] = {
                     VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
     DEFINE_PROP_BIT("x-pcie-flr-init", VirtIOPCIProxy, flags,
                     VIRTIO_PCI_FLAG_INIT_FLR_BIT, true),
+    DEFINE_PROP_BIT("aer", VirtIOPCIProxy, flags,
+                    VIRTIO_PCI_FLAG_AER_BIT, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index 06e2af1..d7d5d40 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -41,6 +41,7 @@ enum {
     VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT,
     VIRTIO_PCI_FLAG_INIT_PM_BIT,
     VIRTIO_PCI_FLAG_INIT_FLR_BIT,
+    VIRTIO_PCI_FLAG_AER_BIT,
 };
 
 /* Need to activate work-arounds for buggy guests at vmstate load. */
@@ -80,6 +81,9 @@ enum {
 /* Init Function Level Reset capability */
 #define VIRTIO_PCI_FLAG_INIT_FLR (1 << VIRTIO_PCI_FLAG_INIT_FLR_BIT)
 
+/* Advanced Error Reporting capability */
+#define VIRTIO_PCI_FLAG_AER (1 << VIRTIO_PCI_FLAG_AER_BIT)
+
 typedef struct {
     MSIMessage msg;
     int virq;
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index ceb58fd..eff35fa 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3161,12 +3161,15 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
             nheads = vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_avail_idx;
             /* Check it isn't doing strange things with descriptor numbers. */
             if (nheads > vdev->vq[i].vring.num) {
-                qemu_log_mask(LOG_GUEST_ERROR,
-                              "VQ %d size 0x%x Guest index 0x%x "
-                              "inconsistent with Host index 0x%x: delta 0x%x",
-                              i, vdev->vq[i].vring.num,
-                              vring_avail_idx(&vdev->vq[i]),
-                              vdev->vq[i].last_avail_idx, nheads);
+                virtio_error(vdev, "VQ %d size 0x%x Guest index 0x%x "
+                             "inconsistent with Host index 0x%x: delta 0x%x",
+                             i, vdev->vq[i].vring.num,
+                             vring_avail_idx(&vdev->vq[i]),
+                             vdev->vq[i].last_avail_idx, nheads);
+                vdev->vq[i].used_idx = 0;
+                vdev->vq[i].shadow_avail_idx = 0;
+                vdev->vq[i].inuse = 0;
+                continue;
             }
             vdev->vq[i].used_idx = vring_used_idx(&vdev->vq[i]);
             vdev->vq[i].shadow_avail_idx = vring_avail_idx(&vdev->vq[i]);
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 0f3e6bc..521d990 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -97,9 +97,14 @@ typedef enum {
     IOMMU_NOTIFIER_UNMAP = 0x1,
     /* Notify entry changes (newly created entries) */
     IOMMU_NOTIFIER_MAP = 0x2,
+    /* Notify changes on device IOTLB entries */
+    IOMMU_NOTIFIER_DEVIOTLB_UNMAP = 0x04,
 } IOMMUNotifierFlag;
 
-#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP)
+#define IOMMU_NOTIFIER_IOTLB_EVENTS (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP)
+#define IOMMU_NOTIFIER_DEVIOTLB_EVENTS IOMMU_NOTIFIER_DEVIOTLB_UNMAP
+#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_IOTLB_EVENTS | \
+                            IOMMU_NOTIFIER_DEVIOTLB_EVENTS)
 
 struct IOMMUNotifier;
 typedef void (*IOMMUNotify)(struct IOMMUNotifier *notifier,
@@ -116,6 +121,11 @@ struct IOMMUNotifier {
 };
 typedef struct IOMMUNotifier IOMMUNotifier;
 
+typedef struct IOMMUTLBEvent {
+    IOMMUNotifierFlag type;
+    IOMMUTLBEntry entry;
+} IOMMUTLBEvent;
+
 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
 #define RAM_PREALLOC   (1 << 0)
 
@@ -236,7 +246,7 @@ enum IOMMUMemoryRegionAttr {
  * The IOMMU implementation must use the IOMMU notifier infrastructure
  * to report whenever mappings are changed, by calling
  * memory_region_notify_iommu() (or, if necessary, by calling
- * memory_region_notify_one() for each registered notifier).
+ * memory_region_notify_iommu_one() for each registered notifier).
  *
  * Conceptually an IOMMU provides a mapping from input address
  * to an output TLB entry. If the IOMMU is aware of memory transaction
@@ -1326,39 +1336,33 @@ uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr);
 /**
  * memory_region_notify_iommu: notify a change in an IOMMU translation entry.
  *
- * The notification type will be decided by entry.perm bits:
- *
- * - For UNMAP (cache invalidation) notifies: set entry.perm to IOMMU_NONE.
- * - For MAP (newly added entry) notifies: set entry.perm to the
- *   permission of the page (which is definitely !IOMMU_NONE).
- *
  * Note: for any IOMMU implementation, an in-place mapping change
  * should be notified with an UNMAP followed by a MAP.
  *
  * @iommu_mr: the memory region that was changed
  * @iommu_idx: the IOMMU index for the translation table which has changed
- * @entry: the new entry in the IOMMU translation table.  The entry
- *         replaces all old entries for the same virtual I/O address range.
- *         Deleted entries have .@perm == 0.
+ * @event: TLB event with the new entry in the IOMMU translation table.
+ *         The entry replaces all old entries for the same virtual I/O address
+ *         range.
  */
 void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
                                 int iommu_idx,
-                                IOMMUTLBEntry entry);
+                                IOMMUTLBEvent event);
 
 /**
- * memory_region_notify_one: notify a change in an IOMMU translation
+ * memory_region_notify_iommu_one: notify a change in an IOMMU translation
  *                           entry to a single notifier
  *
  * This works just like memory_region_notify_iommu(), but it only
  * notifies a specific notifier, not all of them.
  *
  * @notifier: the notifier to be notified
- * @entry: the new entry in the IOMMU translation table.  The entry
- *         replaces all old entries for the same virtual I/O address range.
- *         Deleted entries have .@perm == 0.
+ * @event: TLB event with the new entry in the IOMMU translation table.
+ *         The entry replaces all old entries for the same virtual I/O address
+ *         range.
  */
-void memory_region_notify_one(IOMMUNotifier *notifier,
-                              IOMMUTLBEntry *entry);
+void memory_region_notify_iommu_one(IOMMUNotifier *notifier,
+                                    IOMMUTLBEvent *event);
 
 /**
  * memory_region_register_iommu_notifier: register a notifier for changes to
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index fe0055f..e727bea 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -224,6 +224,20 @@ struct AcpiBuildTables {
     BIOSLinker *linker;
 } AcpiBuildTables;
 
+typedef
+struct CrsRangeEntry {
+    uint64_t base;
+    uint64_t limit;
+} CrsRangeEntry;
+
+typedef
+struct CrsRangeSet {
+    GPtrArray *io_ranges;
+    GPtrArray *mem_ranges;
+    GPtrArray *mem_64bit_ranges;
+} CrsRangeSet;
+
+
 /*
  * ACPI 5.0: 6.4.3.8.2 Serial Bus Connection Descriptors
  * Serial Bus Type
@@ -432,6 +446,14 @@ build_append_gas_from_struct(GArray *table, const struct AcpiGenericAddress *s)
                      s->access_width, s->address);
 }
 
+void crs_range_insert(GPtrArray *ranges, uint64_t base, uint64_t limit);
+void crs_replace_with_free_ranges(GPtrArray *ranges,
+                                         uint64_t start, uint64_t end);
+void crs_range_set_init(CrsRangeSet *range_set);
+void crs_range_set_free(CrsRangeSet *range_set);
+
+Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set);
+
 void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
                        uint64_t len, int node, MemoryAffinityFlags flags);
 
diff --git a/include/hw/acpi/cpu.h b/include/hw/acpi/cpu.h
index 0eeedaa..999caaf 100644
--- a/include/hw/acpi/cpu.h
+++ b/include/hw/acpi/cpu.h
@@ -22,6 +22,7 @@ typedef struct AcpiCpuStatus {
     uint64_t arch_id;
     bool is_inserting;
     bool is_removing;
+    bool fw_remove;
     uint32_t ost_event;
     uint32_t ost_status;
 } AcpiCpuStatus;
@@ -50,6 +51,7 @@ void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
 typedef struct CPUHotplugFeatures {
     bool acpi_1_compatible;
     bool has_legacy_cphp;
+    bool fw_unplugs_cpu;
     const char *smi_path;
 } CPUHotplugFeatures;
 
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index aad6d69..abf54fa 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -163,6 +163,7 @@ struct VirtMachineState {
     DeviceState *gic;
     DeviceState *acpi_dev;
     Notifier powerdown_notifier;
+    PCIBus *bus;
 };
 
 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM)
diff --git a/include/hw/boards.h b/include/hw/boards.h
index a49e3a6..f94f4ad 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -310,6 +310,9 @@ struct MachineState {
     } \
     type_init(machine_initfn##_register_types)
 
+extern GlobalProperty hw_compat_5_2[];
+extern const size_t hw_compat_5_2_len;
+
 extern GlobalProperty hw_compat_5_1[];
 extern const size_t hw_compat_5_1_len;
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 911e460..2aa8797 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -44,6 +44,7 @@ typedef struct PCMachineState {
     bool sata_enabled;
     bool pit_enabled;
     bool hpet_enabled;
+    uint64_t max_fw_size;
 
     /* NUMA information: */
     uint64_t numa_nodes;
@@ -60,6 +61,7 @@ typedef struct PCMachineState {
 #define PC_MACHINE_SMBUS            "smbus"
 #define PC_MACHINE_SATA             "sata"
 #define PC_MACHINE_PIT              "pit"
+#define PC_MACHINE_MAX_FW_SIZE      "max-fw-size"
 
 /**
  * PCMachineClass:
@@ -191,6 +193,9 @@ void pc_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory);
 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
                        const CPUArchIdList *apic_ids, GArray *entry);
 
+extern GlobalProperty pc_compat_5_2[];
+extern const size_t pc_compat_5_2_len;
+
 extern GlobalProperty pc_compat_5_1[];
 extern const size_t pc_compat_5_1_len;
 
diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h
index 8a9f573..0e7a8bc 100644
--- a/include/hw/nvram/fw_cfg.h
+++ b/include/hw/nvram/fw_cfg.h
@@ -308,6 +308,15 @@ void *fw_cfg_modify_file(FWCfgState *s, const char *filename, void *data,
 bool fw_cfg_add_from_generator(FWCfgState *s, const char *filename,
                                const char *gen_id, Error **errp);
 
+/**
+ * fw_cfg_add_extra_pci_roots:
+ * @bus: main pci root bus to be scanned from
+ * @s: fw_cfg device being modified
+ *
+ * Add a new fw_cfg item...
+ */
+void fw_cfg_add_extra_pci_roots(PCIBus *bus, FWCfgState *s);
+
 FWCfgState *fw_cfg_init_io_dma(uint32_t iobase, uint32_t dma_iobase,
                                 AddressSpace *dma_as);
 FWCfgState *fw_cfg_init_io(uint32_t iobase);
diff --git a/include/hw/pci-host/gpex.h b/include/hw/pci-host/gpex.h
index d52ea80..d48a020 100644
--- a/include/hw/pci-host/gpex.h
+++ b/include/hw/pci-host/gpex.h
@@ -59,6 +59,7 @@ struct GPEXConfig {
     MemMapEntry mmio64;
     MemMapEntry pio;
     int         irq;
+    PCIBus      *bus;
 };
 
 int gpex_set_irq_num(GPEXHost *s, int index, int gsi);
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 5e73719..6ac86db 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -81,16 +81,17 @@ typedef void (*BusUnrealize)(BusState *bus);
  * </note>
  *
  * # Hiding a device #
- * To hide a device, a DeviceListener function should_be_hidden() needs to
+ * To hide a device, a DeviceListener function hide_device() needs to
  * be registered.
- * It can be used to defer adding a device and therefore hide it from the
- * guest. The handler registering to this DeviceListener can save the QOpts
- * passed to it for re-using it later and must return that it wants the device
- * to be/remain hidden or not. When the handler function decides the device
- * shall not be hidden it will be added in qdev_device_add() and
- * realized as any other device. Otherwise qdev_device_add() will return early
- * without adding the device. The guest will not see a "hidden" device
- * until it was marked don't hide and qdev_device_add called again.
+ * It can be used to defer adding a device and therefore hide it from
+ * the guest. The handler registering to this DeviceListener can save
+ * the QOpts passed to it for re-using it later. It must return if it
+ * wants the device to be hidden or visible. When the handler function
+ * decides the device shall be visible it will be added with
+ * qdev_device_add() and realized as any other device. Otherwise
+ * qdev_device_add() will return early without adding the device. The
+ * guest will not see a "hidden" device until it was marked visible
+ * and qdev_device_add called again.
  *
  */
 struct DeviceClass {
@@ -196,11 +197,12 @@ struct DeviceListener {
     void (*realize)(DeviceListener *listener, DeviceState *dev);
     void (*unrealize)(DeviceListener *listener, DeviceState *dev);
     /*
-     * This callback is called upon init of the DeviceState and allows to
-     * inform qdev that a device should be hidden, depending on the device
-     * opts, for example, to hide a standby device.
+     * This callback is called upon init of the DeviceState and
+     * informs qdev if a device should be visible or hidden.  We can
+     * hide a failover device depending for example on the device
+     * opts.
      */
-    int (*should_be_hidden)(DeviceListener *listener, QemuOpts *device_opts);
+    bool (*hide_device)(DeviceListener *listener, QemuOpts *device_opts);
     QTAILQ_ENTRY(DeviceListener) link;
 };
 
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index f4852ac..7e96d19 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -202,13 +202,8 @@ struct VirtIONet {
     AnnounceTimer announce_timer;
     bool needs_vnet_hdr_swap;
     bool mtu_bypass_backend;
-    QemuOpts *primary_device_opts;
-    QDict *primary_device_dict;
-    DeviceState *primary_dev;
-    BusState *primary_bus;
-    char *primary_device_id;
-    char *standby_id;
-    bool primary_should_be_hidden;
+    /* primary failover device is hidden*/
+    bool failover_primary_hidden;
     bool failover;
     DeviceListener primary_listener;
     Notifier migration_state;
diff --git a/include/qemu/vhost-user-server.h b/include/qemu/vhost-user-server.h
index 0da4c2c..121ea1d 100644
--- a/include/qemu/vhost-user-server.h
+++ b/include/qemu/vhost-user-server.h
@@ -11,7 +11,7 @@
 #ifndef VHOST_USER_SERVER_H
 #define VHOST_USER_SERVER_H
 
-#include "contrib/libvhost-user/libvhost-user.h"
+#include "subprojects/libvhost-user/libvhost-user.h" /* only for the type definitions */
 #include "io/channel-socket.h"
 #include "io/channel-file.h"
 #include "io/net-listener.h"
diff --git a/meson.build b/meson.build
index e338619..732b29a 100644
--- a/meson.build
+++ b/meson.build
@@ -1475,7 +1475,12 @@ trace_events_subdirs += [
   'util',
 ]
 
-subdir('contrib/libvhost-user')
+vhost_user = not_found
+if 'CONFIG_VHOST_USER' in config_host
+  libvhost_user = subproject('libvhost-user')
+  vhost_user = libvhost_user.get_variable('vhost_user_dep')
+endif
+
 subdir('qapi')
 subdir('qobject')
 subdir('stubs')
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 11ca94d..22bacbb 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -1942,11 +1942,16 @@ void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
     memory_region_update_iommu_notify_flags(iommu_mr, NULL);
 }
 
-void memory_region_notify_one(IOMMUNotifier *notifier,
-                              IOMMUTLBEntry *entry)
+void memory_region_notify_iommu_one(IOMMUNotifier *notifier,
+                                    IOMMUTLBEvent *event)
 {
-    IOMMUNotifierFlag request_flags;
+    IOMMUTLBEntry *entry = &event->entry;
     hwaddr entry_end = entry->iova + entry->addr_mask;
+    IOMMUTLBEntry tmp = *entry;
+
+    if (event->type == IOMMU_NOTIFIER_UNMAP) {
+        assert(entry->perm == IOMMU_NONE);
+    }
 
     /*
      * Skip the notification if the notification does not overlap
@@ -1956,22 +1961,22 @@ void memory_region_notify_one(IOMMUNotifier *notifier,
         return;
     }
 
-    assert(entry->iova >= notifier->start && entry_end <= notifier->end);
-
-    if (entry->perm & IOMMU_RW) {
-        request_flags = IOMMU_NOTIFIER_MAP;
+    if (notifier->notifier_flags & IOMMU_NOTIFIER_DEVIOTLB_UNMAP) {
+        /* Crop (iova, addr_mask) to range */
+        tmp.iova = MAX(tmp.iova, notifier->start);
+        tmp.addr_mask = MIN(entry_end, notifier->end) - tmp.iova;
     } else {
-        request_flags = IOMMU_NOTIFIER_UNMAP;
+        assert(entry->iova >= notifier->start && entry_end <= notifier->end);
     }
 
-    if (notifier->notifier_flags & request_flags) {
-        notifier->notify(notifier, entry);
+    if (event->type & notifier->notifier_flags) {
+        notifier->notify(notifier, &tmp);
     }
 }
 
 void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
                                 int iommu_idx,
-                                IOMMUTLBEntry entry)
+                                IOMMUTLBEvent event)
 {
     IOMMUNotifier *iommu_notifier;
 
@@ -1979,7 +1984,7 @@ void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
 
     IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
         if (iommu_notifier->iommu_idx == iommu_idx) {
-            memory_region_notify_one(iommu_notifier, &entry);
+            memory_region_notify_iommu_one(iommu_notifier, &event);
         }
     }
 }
diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c
index bf79d0b..301089e 100644
--- a/softmmu/qdev-monitor.c
+++ b/softmmu/qdev-monitor.c
@@ -572,35 +572,12 @@ void qdev_set_id(DeviceState *dev, const char *id)
     }
 }
 
-static int is_failover_device(void *opaque, const char *name, const char *value,
-                        Error **errp)
-{
-    if (strcmp(name, "failover_pair_id") == 0) {
-        QemuOpts *opts = (QemuOpts *)opaque;
-
-        if (qdev_should_hide_device(opts)) {
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
-static bool should_hide_device(QemuOpts *opts)
-{
-    if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
-        return false;
-    }
-    return true;
-}
-
 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 {
     DeviceClass *dc;
     const char *driver, *path;
     DeviceState *dev = NULL;
     BusState *bus = NULL;
-    bool hide;
 
     driver = qemu_opt_get(opts, "driver");
     if (!driver) {
@@ -634,14 +611,22 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
             return NULL;
         }
     }
-    hide = should_hide_device(opts);
 
-    if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
-        error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
-        return NULL;
+    if (qemu_opt_get(opts, "failover_pair_id")) {
+        if (!opts->id) {
+            error_setg(errp, "Device with failover_pair_id don't have id");
+            return NULL;
+        }
+        if (qdev_should_hide_device(opts)) {
+            if (bus && !qbus_is_hotpluggable(bus)) {
+                error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
+            }
+            return NULL;
+        }
     }
 
-    if (hide) {
+    if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
+        error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
         return NULL;
     }
 
diff --git a/contrib/libvhost-user/libvhost-user-glib.c b/subprojects/libvhost-user/libvhost-user-glib.c
index 0df2ec9..efc9d81 100644
--- a/contrib/libvhost-user/libvhost-user-glib.c
+++ b/subprojects/libvhost-user/libvhost-user-glib.c
@@ -12,10 +12,16 @@
  * later.  See the COPYING file in the top-level directory.
  */
 
-#include "qemu/osdep.h"
-
 #include "libvhost-user-glib.h"
 
+#ifndef container_of
+#define container_of(ptr, type, member)              \
+    __extension__({                                  \
+        void *__mptr = (void *)(ptr);                \
+        ((type *)(__mptr - offsetof(type, member))); \
+    })
+#endif
+
 /* glib event loop integration for libvhost-user and misc callbacks */
 
 G_STATIC_ASSERT((int)G_IO_IN == (int)VU_WATCH_IN);
diff --git a/contrib/libvhost-user/libvhost-user-glib.h b/subprojects/libvhost-user/libvhost-user-glib.h
index 1a79a49..1a79a49 100644
--- a/contrib/libvhost-user/libvhost-user-glib.h
+++ b/subprojects/libvhost-user/libvhost-user-glib.h
diff --git a/contrib/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
index 5c73ffd..fab7ca1 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -26,7 +26,7 @@
 #include <sys/socket.h>
 #include <sys/eventfd.h>
 #include <sys/mman.h>
-#include "qemu/compiler.h"
+#include <endian.h>
 
 #if defined(__linux__)
 #include <sys/syscall.h>
@@ -41,9 +41,6 @@
 #endif
 
 #include "qemu/atomic.h"
-#include "qemu/osdep.h"
-#include "qemu/bswap.h"
-#include "qemu/memfd.h"
 
 #include "libvhost-user.h"
 
@@ -62,6 +59,10 @@
 /* Round number up to multiple */
 #define ALIGN_UP(n, m) ALIGN_DOWN((n) + (m) - 1, (m))
 
+#ifndef unlikely
+#define unlikely(x)   __builtin_expect(!!(x), 0)
+#endif
+
 /* Align each region to cache line size in inflight buffer */
 #define INFLIGHT_ALIGNMENT 64
 
@@ -1081,7 +1082,7 @@ vu_set_vring_addr_exec(VuDev *dev, VhostUserMsg *vmsg)
         return false;
     }
 
-    vq->used_idx = lduw_le_p(&vq->vring.used->idx);
+    vq->used_idx = le16toh(vq->vring.used->idx);
 
     if (vq->last_avail_idx != vq->used_idx) {
         bool resume = dev->iface->queue_is_processed_in_order &&
@@ -1198,7 +1199,7 @@ vu_check_queue_inflights(VuDev *dev, VuVirtq *vq)
         return 0;
     }
 
-    vq->used_idx = lduw_le_p(&vq->vring.used->idx);
+    vq->used_idx = le16toh(vq->vring.used->idx);
     vq->resubmit_num = 0;
     vq->resubmit_list = NULL;
     vq->counter = 0;
@@ -1615,11 +1616,45 @@ vu_inflight_queue_size(uint16_t queue_size)
            sizeof(uint16_t), INFLIGHT_ALIGNMENT);
 }
 
+#ifdef MFD_ALLOW_SEALING
+static void *
+memfd_alloc(const char *name, size_t size, unsigned int flags, int *fd)
+{
+    void *ptr;
+    int ret;
+
+    *fd = memfd_create(name, MFD_ALLOW_SEALING);
+    if (*fd < 0) {
+        return NULL;
+    }
+
+    ret = ftruncate(*fd, size);
+    if (ret < 0) {
+        close(*fd);
+        return NULL;
+    }
+
+    ret = fcntl(*fd, F_ADD_SEALS, flags);
+    if (ret < 0) {
+        close(*fd);
+        return NULL;
+    }
+
+    ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
+    if (ptr == MAP_FAILED) {
+        close(*fd);
+        return NULL;
+    }
+
+    return ptr;
+}
+#endif
+
 static bool
 vu_get_inflight_fd(VuDev *dev, VhostUserMsg *vmsg)
 {
-    int fd;
-    void *addr;
+    int fd = -1;
+    void *addr = NULL;
     uint64_t mmap_size;
     uint16_t num_queues, queue_size;
 
@@ -1637,9 +1672,13 @@ vu_get_inflight_fd(VuDev *dev, VhostUserMsg *vmsg)
 
     mmap_size = vu_inflight_queue_size(queue_size) * num_queues;
 
-    addr = qemu_memfd_alloc("vhost-inflight", mmap_size,
-                            F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL,
-                            &fd, NULL);
+#ifdef MFD_ALLOW_SEALING
+    addr = memfd_alloc("vhost-inflight", mmap_size,
+                       F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL,
+                       &fd);
+#else
+    vu_panic(dev, "Not implemented: memfd support is missing");
+#endif
 
     if (!addr) {
         vu_panic(dev, "Failed to alloc vhost inflight area");
@@ -2031,13 +2070,13 @@ vu_queue_started(const VuDev *dev, const VuVirtq *vq)
 static inline uint16_t
 vring_avail_flags(VuVirtq *vq)
 {
-    return lduw_le_p(&vq->vring.avail->flags);
+    return le16toh(vq->vring.avail->flags);
 }
 
 static inline uint16_t
 vring_avail_idx(VuVirtq *vq)
 {
-    vq->shadow_avail_idx = lduw_le_p(&vq->vring.avail->idx);
+    vq->shadow_avail_idx = le16toh(vq->vring.avail->idx);
 
     return vq->shadow_avail_idx;
 }
@@ -2045,7 +2084,7 @@ vring_avail_idx(VuVirtq *vq)
 static inline uint16_t
 vring_avail_ring(VuVirtq *vq, int i)
 {
-    return lduw_le_p(&vq->vring.avail->ring[i]);
+    return le16toh(vq->vring.avail->ring[i]);
 }
 
 static inline uint16_t
@@ -2133,12 +2172,12 @@ virtqueue_read_next_desc(VuDev *dev, struct vring_desc *desc,
                          int i, unsigned int max, unsigned int *next)
 {
     /* If this descriptor says it doesn't chain, we're done. */
-    if (!(lduw_le_p(&desc[i].flags) & VRING_DESC_F_NEXT)) {
+    if (!(le16toh(desc[i].flags) & VRING_DESC_F_NEXT)) {
         return VIRTQUEUE_READ_DESC_DONE;
     }
 
     /* Check they're not leading us off end of descriptors. */
-    *next = lduw_le_p(&desc[i].next);
+    *next = le16toh(desc[i].next);
     /* Make sure compiler knows to grab that: we don't want it changing! */
     smp_wmb();
 
@@ -2181,8 +2220,8 @@ vu_queue_get_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int *in_bytes,
         }
         desc = vq->vring.desc;
 
-        if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_INDIRECT) {
-            if (ldl_le_p(&desc[i].len) % sizeof(struct vring_desc)) {
+        if (le16toh(desc[i].flags) & VRING_DESC_F_INDIRECT) {
+            if (le32toh(desc[i].len) % sizeof(struct vring_desc)) {
                 vu_panic(dev, "Invalid size for indirect buffer table");
                 goto err;
             }
@@ -2195,8 +2234,8 @@ vu_queue_get_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int *in_bytes,
 
             /* loop over the indirect descriptor table */
             indirect = 1;
-            desc_addr = ldq_le_p(&desc[i].addr);
-            desc_len = ldl_le_p(&desc[i].len);
+            desc_addr = le64toh(desc[i].addr);
+            desc_len = le32toh(desc[i].len);
             max = desc_len / sizeof(struct vring_desc);
             read_len = desc_len;
             desc = vu_gpa_to_va(dev, &read_len, desc_addr);
@@ -2223,10 +2262,10 @@ vu_queue_get_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int *in_bytes,
                 goto err;
             }
 
-            if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_WRITE) {
-                in_total += ldl_le_p(&desc[i].len);
+            if (le16toh(desc[i].flags) & VRING_DESC_F_WRITE) {
+                in_total += le32toh(desc[i].len);
             } else {
-                out_total += ldl_le_p(&desc[i].len);
+                out_total += le32toh(desc[i].len);
             }
             if (in_total >= max_in_bytes && out_total >= max_out_bytes) {
                 goto done;
@@ -2377,7 +2416,7 @@ vring_used_flags_set_bit(VuVirtq *vq, int mask)
 
     flags = (uint16_t *)((char*)vq->vring.used +
                          offsetof(struct vring_used, flags));
-    stw_le_p(flags, lduw_le_p(flags) | mask);
+    *flags = htole16(le16toh(*flags) | mask);
 }
 
 static inline void
@@ -2387,17 +2426,20 @@ vring_used_flags_unset_bit(VuVirtq *vq, int mask)
 
     flags = (uint16_t *)((char*)vq->vring.used +
                          offsetof(struct vring_used, flags));
-    stw_le_p(flags, lduw_le_p(flags) & ~mask);
+    *flags = htole16(le16toh(*flags) & ~mask);
 }
 
 static inline void
 vring_set_avail_event(VuVirtq *vq, uint16_t val)
 {
+    uint16_t *avail;
+
     if (!vq->notification) {
         return;
     }
 
-    stw_le_p(&vq->vring.used->ring[vq->vring.num], val);
+    avail = (uint16_t *)&vq->vring.used->ring[vq->vring.num];
+    *avail = htole16(val);
 }
 
 void
@@ -2487,15 +2529,15 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz)
     struct vring_desc desc_buf[VIRTQUEUE_MAX_SIZE];
     int rc;
 
-    if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_INDIRECT) {
-        if (ldl_le_p(&desc[i].len) % sizeof(struct vring_desc)) {
+    if (le16toh(desc[i].flags) & VRING_DESC_F_INDIRECT) {
+        if (le32toh(desc[i].len) % sizeof(struct vring_desc)) {
             vu_panic(dev, "Invalid size for indirect buffer table");
             return NULL;
         }
 
         /* loop over the indirect descriptor table */
-        desc_addr = ldq_le_p(&desc[i].addr);
-        desc_len = ldl_le_p(&desc[i].len);
+        desc_addr = le64toh(desc[i].addr);
+        desc_len = le32toh(desc[i].len);
         max = desc_len / sizeof(struct vring_desc);
         read_len = desc_len;
         desc = vu_gpa_to_va(dev, &read_len, desc_addr);
@@ -2517,11 +2559,11 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz)
 
     /* Collect all the descriptors */
     do {
-        if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_WRITE) {
+        if (le16toh(desc[i].flags) & VRING_DESC_F_WRITE) {
             if (!virtqueue_map_desc(dev, &in_num, iov + out_num,
                                VIRTQUEUE_MAX_SIZE - out_num, true,
-                               ldq_le_p(&desc[i].addr),
-                               ldl_le_p(&desc[i].len))) {
+                               le64toh(desc[i].addr),
+                               le32toh(desc[i].len))) {
                 return NULL;
             }
         } else {
@@ -2531,8 +2573,8 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz)
             }
             if (!virtqueue_map_desc(dev, &out_num, iov,
                                VIRTQUEUE_MAX_SIZE, false,
-                               ldq_le_p(&desc[i].addr),
-                               ldl_le_p(&desc[i].len))) {
+                               le64toh(desc[i].addr),
+                               le32toh(desc[i].len))) {
                 return NULL;
             }
         }
@@ -2731,15 +2773,15 @@ vu_log_queue_fill(VuDev *dev, VuVirtq *vq,
     max = vq->vring.num;
     i = elem->index;
 
-    if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_INDIRECT) {
-        if (ldl_le_p(&desc[i].len) % sizeof(struct vring_desc)) {
+    if (le16toh(desc[i].flags) & VRING_DESC_F_INDIRECT) {
+        if (le32toh(desc[i].len) % sizeof(struct vring_desc)) {
             vu_panic(dev, "Invalid size for indirect buffer table");
             return;
         }
 
         /* loop over the indirect descriptor table */
-        desc_addr = ldq_le_p(&desc[i].addr);
-        desc_len = ldl_le_p(&desc[i].len);
+        desc_addr = le64toh(desc[i].addr);
+        desc_len = le32toh(desc[i].len);
         max = desc_len / sizeof(struct vring_desc);
         read_len = desc_len;
         desc = vu_gpa_to_va(dev, &read_len, desc_addr);
@@ -2765,9 +2807,9 @@ vu_log_queue_fill(VuDev *dev, VuVirtq *vq,
             return;
         }
 
-        if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_WRITE) {
-            min = MIN(ldl_le_p(&desc[i].len), len);
-            vu_log_write(dev, ldq_le_p(&desc[i].addr), min);
+        if (le16toh(desc[i].flags) & VRING_DESC_F_WRITE) {
+            min = MIN(le32toh(desc[i].len), len);
+            vu_log_write(dev, le64toh(desc[i].addr), min);
             len -= min;
         }
 
@@ -2792,15 +2834,15 @@ vu_queue_fill(VuDev *dev, VuVirtq *vq,
 
     idx = (idx + vq->used_idx) % vq->vring.num;
 
-    stl_le_p(&uelem.id, elem->index);
-    stl_le_p(&uelem.len, len);
+    uelem.id = htole32(elem->index);
+    uelem.len = htole32(len);
     vring_used_write(dev, vq, &uelem, idx);
 }
 
 static inline
 void vring_used_idx_set(VuDev *dev, VuVirtq *vq, uint16_t val)
 {
-    stw_le_p(&vq->vring.used->idx, val);
+    vq->vring.used->idx = htole16(val);
     vu_log_write(dev,
                  vq->vring.log_guest_addr + offsetof(struct vring_used, idx),
                  sizeof(vq->vring.used->idx));
diff --git a/contrib/libvhost-user/libvhost-user.h b/subprojects/libvhost-user/libvhost-user.h
index 7d47f13..7d47f13 100644
--- a/contrib/libvhost-user/libvhost-user.h
+++ b/subprojects/libvhost-user/libvhost-user.h
diff --git a/subprojects/libvhost-user/link-test.c b/subprojects/libvhost-user/link-test.c
new file mode 100644
index 0000000..e01d6eb
--- /dev/null
+++ b/subprojects/libvhost-user/link-test.c
@@ -0,0 +1,45 @@
+/*
+ * A trivial unit test to check linking without glib. A real test suite should
+ * probably based off libvhost-user-glib instead.
+ */
+#include <assert.h>
+#include <stdlib.h>
+#include "libvhost-user.h"
+
+static void
+panic(VuDev *dev, const char *err)
+{
+    abort();
+}
+
+static void
+set_watch(VuDev *dev, int fd, int condition,
+          vu_watch_cb cb, void *data)
+{
+    abort();
+}
+
+static void
+remove_watch(VuDev *dev, int fd)
+{
+    abort();
+}
+
+static const VuDevIface iface = {
+    0,
+};
+
+int
+main(int argc, const char *argv[])
+{
+    bool rc;
+    uint16_t max_queues = 2;
+    int socket = 0;
+    VuDev dev = { 0, };
+
+    rc = vu_init(&dev, max_queues, socket, panic, NULL, set_watch, remove_watch, &iface);
+    assert(rc == true);
+    vu_deinit(&dev);
+
+    return 0;
+}
diff --git a/subprojects/libvhost-user/meson.build b/subprojects/libvhost-user/meson.build
new file mode 100644
index 0000000..c5d85c1
--- /dev/null
+++ b/subprojects/libvhost-user/meson.build
@@ -0,0 +1,24 @@
+project('libvhost-user', 'c',
+        license: 'GPL-2.0-or-later',
+        default_options: ['c_std=gnu99'])
+
+glib = dependency('glib-2.0')
+inc = include_directories('../../include', '../../linux-headers')
+
+vhost_user = static_library('vhost-user',
+                            files('libvhost-user.c'),
+                            include_directories: inc,
+                            c_args: '-D_GNU_SOURCE')
+
+executable('link-test', files('link-test.c'),
+           link_whole: vhost_user,
+           include_directories: inc)
+
+vhost_user_glib = static_library('vhost-user-glib',
+                                 files('libvhost-user-glib.c'),
+                                 include_directories: inc,
+                                 link_with: vhost_user,
+                                 dependencies: glib)
+
+vhost_user_dep = declare_dependency(link_with: vhost_user_glib,
+                                    include_directories: include_directories('.'))
diff --git a/tests/data/acpi/pc/DSDT b/tests/data/acpi/pc/DSDT
index 4ca46e5..f6173df 100644
--- a/tests/data/acpi/pc/DSDT
+++ b/tests/data/acpi/pc/DSDT
diff --git a/tests/data/acpi/pc/DSDT.acpihmat b/tests/data/acpi/pc/DSDT.acpihmat
index 35a74bc..67f3f72 100644
--- a/tests/data/acpi/pc/DSDT.acpihmat
+++ b/tests/data/acpi/pc/DSDT.acpihmat
diff --git a/tests/data/acpi/pc/DSDT.bridge b/tests/data/acpi/pc/DSDT.bridge
index 803d7a8..643390f 100644
--- a/tests/data/acpi/pc/DSDT.bridge
+++ b/tests/data/acpi/pc/DSDT.bridge
diff --git a/tests/data/acpi/pc/DSDT.cphp b/tests/data/acpi/pc/DSDT.cphp
index 8bab2f5..1ddcf7d 100644
--- a/tests/data/acpi/pc/DSDT.cphp
+++ b/tests/data/acpi/pc/DSDT.cphp
diff --git a/tests/data/acpi/pc/DSDT.dimmpxm b/tests/data/acpi/pc/DSDT.dimmpxm
index e015b45..c44385c 100644
--- a/tests/data/acpi/pc/DSDT.dimmpxm
+++ b/tests/data/acpi/pc/DSDT.dimmpxm
diff --git a/tests/data/acpi/pc/DSDT.hpbridge b/tests/data/acpi/pc/DSDT.hpbridge
index 56032bc..4ecf1eb 100644
--- a/tests/data/acpi/pc/DSDT.hpbridge
+++ b/tests/data/acpi/pc/DSDT.hpbridge
diff --git a/tests/data/acpi/pc/DSDT.hpbrroot b/tests/data/acpi/pc/DSDT.hpbrroot
index 36b0a8f..a304622 100644
--- a/tests/data/acpi/pc/DSDT.hpbrroot
+++ b/tests/data/acpi/pc/DSDT.hpbrroot
diff --git a/tests/data/acpi/pc/DSDT.ipmikcs b/tests/data/acpi/pc/DSDT.ipmikcs
index ca6630e..f1638c5 100644
--- a/tests/data/acpi/pc/DSDT.ipmikcs
+++ b/tests/data/acpi/pc/DSDT.ipmikcs
diff --git a/tests/data/acpi/pc/DSDT.memhp b/tests/data/acpi/pc/DSDT.memhp
index 43f4e11..4c19e45 100644
--- a/tests/data/acpi/pc/DSDT.memhp
+++ b/tests/data/acpi/pc/DSDT.memhp
diff --git a/tests/data/acpi/pc/DSDT.numamem b/tests/data/acpi/pc/DSDT.numamem
index ba8f7e6..40cfd93 100644
--- a/tests/data/acpi/pc/DSDT.numamem
+++ b/tests/data/acpi/pc/DSDT.numamem
diff --git a/tests/data/acpi/pc/DSDT.roothp b/tests/data/acpi/pc/DSDT.roothp
index 18caa07..078fc80 100644
--- a/tests/data/acpi/pc/DSDT.roothp
+++ b/tests/data/acpi/pc/DSDT.roothp
diff --git a/tests/data/acpi/q35/DSDT b/tests/data/acpi/q35/DSDT
index e7414e7..d25cd70 100644
--- a/tests/data/acpi/q35/DSDT
+++ b/tests/data/acpi/q35/DSDT
diff --git a/tests/data/acpi/q35/DSDT.acpihmat b/tests/data/acpi/q35/DSDT.acpihmat
index 88434da..722e06a 100644
--- a/tests/data/acpi/q35/DSDT.acpihmat
+++ b/tests/data/acpi/q35/DSDT.acpihmat
diff --git a/tests/data/acpi/q35/DSDT.bridge b/tests/data/acpi/q35/DSDT.bridge
index 118476f..06bac13 100644
--- a/tests/data/acpi/q35/DSDT.bridge
+++ b/tests/data/acpi/q35/DSDT.bridge
diff --git a/tests/data/acpi/q35/DSDT.cphp b/tests/data/acpi/q35/DSDT.cphp
index 69c5edf..2b933ac 100644
--- a/tests/data/acpi/q35/DSDT.cphp
+++ b/tests/data/acpi/q35/DSDT.cphp
diff --git a/tests/data/acpi/q35/DSDT.dimmpxm b/tests/data/acpi/q35/DSDT.dimmpxm
index af41acb..bd8f830 100644
--- a/tests/data/acpi/q35/DSDT.dimmpxm
+++ b/tests/data/acpi/q35/DSDT.dimmpxm
diff --git a/tests/data/acpi/q35/DSDT.ipmibt b/tests/data/acpi/q35/DSDT.ipmibt
index a650c30..a8f868e 100644
--- a/tests/data/acpi/q35/DSDT.ipmibt
+++ b/tests/data/acpi/q35/DSDT.ipmibt
diff --git a/tests/data/acpi/q35/DSDT.memhp b/tests/data/acpi/q35/DSDT.memhp
index 85598ca..9a802e4 100644
--- a/tests/data/acpi/q35/DSDT.memhp
+++ b/tests/data/acpi/q35/DSDT.memhp
diff --git a/tests/data/acpi/q35/DSDT.mmio64 b/tests/data/acpi/q35/DSDT.mmio64
index 092fdc3..948c2dc 100644
--- a/tests/data/acpi/q35/DSDT.mmio64
+++ b/tests/data/acpi/q35/DSDT.mmio64
diff --git a/tests/data/acpi/q35/DSDT.numamem b/tests/data/acpi/q35/DSDT.numamem
index 8999462..44ec1b0 100644
--- a/tests/data/acpi/q35/DSDT.numamem
+++ b/tests/data/acpi/q35/DSDT.numamem
diff --git a/tests/data/acpi/q35/DSDT.tis b/tests/data/acpi/q35/DSDT.tis
index 08802fb..30da3ec 100644
--- a/tests/data/acpi/q35/DSDT.tis
+++ b/tests/data/acpi/q35/DSDT.tis
diff --git a/tests/data/acpi/virt/DSDT.pxb b/tests/data/acpi/virt/DSDT.pxb
new file mode 100644
index 0000000..d5f0533
--- /dev/null
+++ b/tests/data/acpi/virt/DSDT.pxb
diff --git a/tests/meson.build b/tests/meson.build
index afeb6be..1fa068f 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -264,8 +264,7 @@ endforeach
 if have_tools and 'CONFIG_VHOST_USER' in config_host and 'CONFIG_LINUX' in config_host
   executable('vhost-user-bridge',
              sources: files('vhost-user-bridge.c'),
-             link_with: [libvhost_user],
-             dependencies: [qemuutil])
+             dependencies: [qemuutil, vhost_user])
 endif
 
 if have_system and 'CONFIG_POSIX' in config_host
diff --git a/tests/qtest/bios-tables-test.c b/tests/qtest/bios-tables-test.c
index f23a533..64a9a77 100644
--- a/tests/qtest/bios-tables-test.c
+++ b/tests/qtest/bios-tables-test.c
@@ -671,12 +671,21 @@ static void test_acpi_one(const char *params, test_data *data)
          * TODO: convert '-drive if=pflash' to new syntax (see e33763be7cd3)
          * when arm/virt boad starts to support it.
          */
-        args = g_strdup_printf("-machine %s %s -accel tcg -nodefaults -nographic "
-            "-drive if=pflash,format=raw,file=%s,readonly "
-            "-drive if=pflash,format=raw,file=%s,snapshot=on -cdrom %s %s",
-            data->machine, data->tcg_only ? "" : "-accel kvm",
-            data->uefi_fl1, data->uefi_fl2, data->cd, params ? params : "");
-
+        if (data->cd) {
+            args = g_strdup_printf("-machine %s %s -accel tcg "
+                "-nodefaults -nographic "
+                "-drive if=pflash,format=raw,file=%s,readonly "
+                "-drive if=pflash,format=raw,file=%s,snapshot=on -cdrom %s %s",
+                data->machine, data->tcg_only ? "" : "-accel kvm",
+                data->uefi_fl1, data->uefi_fl2, data->cd, params ? params : "");
+        } else {
+            args = g_strdup_printf("-machine %s %s -accel tcg "
+                "-nodefaults -nographic "
+                "-drive if=pflash,format=raw,file=%s,readonly "
+                "-drive if=pflash,format=raw,file=%s,snapshot=on %s",
+                data->machine, data->tcg_only ? "" : "-accel kvm",
+                data->uefi_fl1, data->uefi_fl2, params ? params : "");
+        }
     } else {
         args = g_strdup_printf("-machine %s %s -accel tcg "
             "-net none -display none %s "
@@ -1176,6 +1185,40 @@ static void test_acpi_virt_tcg_numamem(void)
 
 }
 
+#ifdef CONFIG_PXB
+static void test_acpi_virt_tcg_pxb(void)
+{
+    test_data data = {
+        .machine = "virt",
+        .tcg_only = true,
+        .uefi_fl1 = "pc-bios/edk2-aarch64-code.fd",
+        .uefi_fl2 = "pc-bios/edk2-arm-vars.fd",
+        .ram_start = 0x40000000ULL,
+        .scan_len = 128ULL * 1024 * 1024,
+    };
+    /*
+     * While using -cdrom, the cdrom would auto plugged into pxb-pcie,
+     * the reason is the bus of pxb-pcie is also root bus, it would lead
+     * to the error only PCI/PCIE bridge could plug onto pxb.
+     * Therefore,thr cdrom is defined and plugged onto the scsi controller
+     * to solve the conflicts.
+     */
+    data.variant = ".pxb";
+    test_acpi_one(" -device pcie-root-port,chassis=1,id=pci.1"
+                  " -device virtio-scsi-pci,id=scsi0,bus=pci.1"
+                  " -drive file="
+                  "tests/data/uefi-boot-images/bios-tables-test.aarch64.iso.qcow2,"
+                  "if=none,media=cdrom,id=drive-scsi0-0-0-1,readonly=on"
+                  " -device scsi-cd,bus=scsi0.0,scsi-id=0,"
+                  "drive=drive-scsi0-0-0-1,id=scsi0-0-0-1,bootindex=1"
+                  " -cpu cortex-a57"
+                  " -device pxb-pcie,bus_nr=128",
+                  &data);
+
+    free_test_data(&data);
+}
+#endif
+
 static void test_acpi_tcg_acpi_hmat(const char *machine)
 {
     test_data data;
@@ -1287,6 +1330,9 @@ int main(int argc, char *argv[])
         qtest_add_func("acpi/virt", test_acpi_virt_tcg);
         qtest_add_func("acpi/virt/numamem", test_acpi_virt_tcg_numamem);
         qtest_add_func("acpi/virt/memhp", test_acpi_virt_tcg_memhp);
+#ifdef CONFIG_PXB
+        qtest_add_func("acpi/virt/pxb", test_acpi_virt_tcg_pxb);
+#endif
     }
     ret = g_test_run();
     boot_sector_cleanup(disk);
diff --git a/tests/vhost-user-bridge.c b/tests/vhost-user-bridge.c
index bd43607..2481592 100644
--- a/tests/vhost-user-bridge.c
+++ b/tests/vhost-user-bridge.c
@@ -34,7 +34,7 @@
 #include "qemu/ctype.h"
 #include "qemu/iov.h"
 #include "standard-headers/linux/virtio_net.h"
-#include "contrib/libvhost-user/libvhost-user.h"
+#include "libvhost-user.h"
 
 #define VHOST_USER_BRIDGE_DEBUG 1
 
diff --git a/tools/virtiofsd/fuse_virtio.c b/tools/virtiofsd/fuse_virtio.c
index 83ba07c..623812c 100644
--- a/tools/virtiofsd/fuse_virtio.c
+++ b/tools/virtiofsd/fuse_virtio.c
@@ -35,7 +35,7 @@
 #include <grp.h>
 #include <unistd.h>
 
-#include "contrib/libvhost-user/libvhost-user.h"
+#include "libvhost-user.h"
 
 struct fv_VuDev;
 struct fv_QueueInfo {
diff --git a/tools/virtiofsd/meson.build b/tools/virtiofsd/meson.build
index 17edecf..c134ba6 100644
--- a/tools/virtiofsd/meson.build
+++ b/tools/virtiofsd/meson.build
@@ -8,8 +8,7 @@ executable('virtiofsd', files(
   'helper.c',
   'passthrough_ll.c',
   'passthrough_seccomp.c'),
-  link_with: libvhost_user,
-  dependencies: [seccomp, qemuutil, libcap_ng],
+  dependencies: [seccomp, qemuutil, libcap_ng, vhost_user],
   install: true,
   install_dir: get_option('libexecdir'))