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

pc,pci,virtio: bugfixes, improvements

Fixes all over the place. Faster boot for virtio. ioeventfd support for
mmio.

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

# gpg: Signature made Fri 14 May 2021 15:27:13 BST
# 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:
  Fix build with 64 bits time_t
  vhost-vdpa: Make vhost_vdpa_get_device_id() static
  hw/virtio: enable ioeventfd configuring for mmio
  hw/smbios: support for type 41 (onboard devices extended information)
  checkpatch: Fix use of uninitialized value
  virtio-scsi: Configure all host notifiers in a single MR transaction
  virtio-scsi: Set host notifiers and callbacks separately
  virtio-blk: Configure all host notifiers in a single MR transaction
  virtio-blk: Fix rollback path in virtio_blk_data_plane_start()
  pc-dimm: remove unnecessary get_vmstate_memory_region() method
  amd_iommu: fix wrong MMIO operations
  virtio-net: Constify VirtIOFeature feature_sizes[]
  virtio-blk: Constify VirtIOFeature feature_sizes[]
  hw/virtio: Pass virtio_feature_get_config_size() a const argument
  x86: acpi: use offset instead of pointer when using build_header()
  amd_iommu: Fix pte_override_page_mask()

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

# Conflicts:
#	hw/arm/virt.c

15 files changed, 256 insertions, 63 deletions

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index d33ce89..f0035d2 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -1830,6 +1830,7 @@ build_rsdt(GArray *table_data, BIOSLinker *linker, GArray *table_offsets,
     int i;
     unsigned rsdt_entries_offset;
     AcpiRsdtDescriptorRev1 *rsdt;
+    int rsdt_start = table_data->len;
     const unsigned table_data_len = (sizeof(uint32_t) * table_offsets->len);
     const unsigned rsdt_entry_size = sizeof(rsdt->table_offset_entry[0]);
     const size_t rsdt_len = sizeof(*rsdt) + table_data_len;
@@ -1846,7 +1847,8 @@ build_rsdt(GArray *table_data, BIOSLinker *linker, GArray *table_offsets,
             ACPI_BUILD_TABLE_FILE, ref_tbl_offset);
     }
     build_header(linker, table_data,
-                 (void *)rsdt, "RSDT", rsdt_len, 1, oem_id, oem_table_id);
+                 (void *)(table_data->data + rsdt_start),
+                 "RSDT", rsdt_len, 1, oem_id, oem_table_id);
 }
 
 /* Build xsdt table */
@@ -1857,6 +1859,7 @@ build_xsdt(GArray *table_data, BIOSLinker *linker, GArray *table_offsets,
     int i;
     unsigned xsdt_entries_offset;
     AcpiXsdtDescriptorRev2 *xsdt;
+    int xsdt_start = table_data->len;
     const unsigned table_data_len = (sizeof(uint64_t) * table_offsets->len);
     const unsigned xsdt_entry_size = sizeof(xsdt->table_offset_entry[0]);
     const size_t xsdt_len = sizeof(*xsdt) + table_data_len;
@@ -1873,7 +1876,8 @@ build_xsdt(GArray *table_data, BIOSLinker *linker, GArray *table_offsets,
             ACPI_BUILD_TABLE_FILE, ref_tbl_offset);
     }
     build_header(linker, table_data,
-                 (void *)xsdt, "XSDT", xsdt_len, 1, oem_id, oem_table_id);
+                 (void *)(table_data->data + xsdt_start),
+                 "XSDT", xsdt_len, 1, oem_id, oem_table_id);
 }
 
 void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
@@ -2053,10 +2057,9 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
     uint64_t control_area_start_address;
     TPMIf *tpmif = tpm_find();
     uint32_t start_method;
-    void *tpm2_ptr;
 
     tpm2_start = table_data->len;
-    tpm2_ptr = acpi_data_push(table_data, sizeof(AcpiTableHeader));
+    acpi_data_push(table_data, sizeof(AcpiTableHeader));
 
     /* Platform Class */
     build_append_int_noprefix(table_data, TPM2_ACPI_CLASS_CLIENT, 2);
@@ -2095,8 +2098,8 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
                                    log_addr_offset, 8,
                                    ACPI_BUILD_TPMLOG_FILE, 0);
     build_header(linker, table_data,
-                 tpm2_ptr, "TPM2", table_data->len - tpm2_start, 4, oem_id,
-                 oem_table_id);
+                 (void *)(table_data->data + tpm2_start),
+                 "TPM2", table_data->len - tpm2_start, 4, oem_id, oem_table_id);
 }
 
 Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set, uint32_t io_offset,
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 0a78532..8407586 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -50,6 +50,7 @@
 #include "sysemu/tpm.h"
 #include "sysemu/kvm.h"
 #include "hw/loader.h"
+#include "qapi/error.h"
 #include "qemu/bitops.h"
 #include "qemu/error-report.h"
 #include "qemu/module.h"
@@ -1521,8 +1522,10 @@ static void virt_build_smbios(VirtMachineState *vms)
                         vmc->smbios_old_sys_ver ? "1.0" : mc->name, false,
                         true, SMBIOS_ENTRY_POINT_30);
 
-    smbios_get_tables(MACHINE(vms), NULL, 0, &smbios_tables, &smbios_tables_len,
-                      &smbios_anchor, &smbios_anchor_len);
+    smbios_get_tables(MACHINE(vms), NULL, 0,
+                      &smbios_tables, &smbios_tables_len,
+                      &smbios_anchor, &smbios_anchor_len,
+                      &error_fatal);
 
     if (smbios_anchor) {
         fw_cfg_add_file(vms->fw_cfg, "etc/smbios/smbios-tables",
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index e9050c8..cd81893 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -198,19 +198,30 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
         goto fail_guest_notifiers;
     }
 
+    memory_region_transaction_begin();
+
     /* Set up virtqueue notify */
     for (i = 0; i < nvqs; i++) {
         r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, true);
         if (r != 0) {
+            int j = i;
+
             fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r);
             while (i--) {
                 virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
+            }
+
+            memory_region_transaction_commit();
+
+            while (j--) {
                 virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
             }
-            goto fail_guest_notifiers;
+            goto fail_host_notifiers;
         }
     }
 
+    memory_region_transaction_commit();
+
     s->starting = false;
     vblk->dataplane_started = true;
     trace_virtio_blk_data_plane_start(s);
@@ -221,7 +232,7 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
     aio_context_release(old_context);
     if (r < 0) {
         error_report_err(local_err);
-        goto fail_guest_notifiers;
+        goto fail_aio_context;
     }
 
     /* Process queued requests before the ones in vring */
@@ -245,6 +256,20 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
     aio_context_release(s->ctx);
     return 0;
 
+  fail_aio_context:
+    memory_region_transaction_begin();
+
+    for (i = 0; i < nvqs; i++) {
+        virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
+    }
+
+    memory_region_transaction_commit();
+
+    for (i = 0; i < nvqs; i++) {
+        virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
+    }
+  fail_host_notifiers:
+    k->set_guest_notifiers(qbus->parent, nvqs, false);
   fail_guest_notifiers:
     /*
      * If we failed to set up the guest notifiers queued requests will be
@@ -305,8 +330,15 @@ void virtio_blk_data_plane_stop(VirtIODevice *vdev)
 
     aio_context_release(s->ctx);
 
+    memory_region_transaction_begin();
+
     for (i = 0; i < nvqs; i++) {
         virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
+    }
+
+    memory_region_transaction_commit();
+
+    for (i = 0; i < nvqs; i++) {
         virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
     }
 
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index d28979e..f139cd7 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -40,7 +40,7 @@
  * Starting from the discard feature, we can use this array to properly
  * set the config size depending on the features enabled.
  */
-static VirtIOFeature feature_sizes[] = {
+static const VirtIOFeature feature_sizes[] = {
     {.flags = 1ULL << VIRTIO_BLK_F_DISCARD,
      .end = endof(struct virtio_blk_config, discard_sector_alignment)},
     {.flags = 1ULL << VIRTIO_BLK_F_WRITE_ZEROES,
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index bfecb00..80bee00 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1815,6 +1815,7 @@ build_hpet(GArray *table_data, BIOSLinker *linker, const char *oem_id,
            const char *oem_table_id)
 {
     Acpi20Hpet *hpet;
+    int hpet_start = table_data->len;
 
     hpet = acpi_data_push(table_data, sizeof(*hpet));
     /* Note timer_block_id value must be kept in sync with value advertised by
@@ -1823,13 +1824,15 @@ build_hpet(GArray *table_data, BIOSLinker *linker, const char *oem_id,
     hpet->timer_block_id = cpu_to_le32(0x8086a201);
     hpet->addr.address = cpu_to_le64(HPET_BASE);
     build_header(linker, table_data,
-                 (void *)hpet, "HPET", sizeof(*hpet), 1, oem_id, oem_table_id);
+                 (void *)(table_data->data + hpet_start),
+                 "HPET", sizeof(*hpet), 1, oem_id, oem_table_id);
 }
 
 static void
 build_tpm_tcpa(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
                const char *oem_id, const char *oem_table_id)
 {
+    int tcpa_start = table_data->len;
     Acpi20Tcpa *tcpa = acpi_data_push(table_data, sizeof *tcpa);
     unsigned log_addr_size = sizeof(tcpa->log_area_start_address);
     unsigned log_addr_offset =
@@ -1848,7 +1851,8 @@ build_tpm_tcpa(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
         ACPI_BUILD_TPMLOG_FILE, 0);
 
     build_header(linker, table_data,
-                 (void *)tcpa, "TCPA", sizeof(*tcpa), 2, oem_id, oem_table_id);
+                 (void *)(table_data->data + tcpa_start),
+                 "TCPA", sizeof(*tcpa), 2, oem_id, oem_table_id);
 }
 
 #define HOLE_640K_START  (640 * KiB)
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 74a93a5..2801dff 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -99,7 +99,7 @@ static uint64_t amdvi_readq(AMDVIState *s, hwaddr addr)
 }
 
 /* internal write */
-static void amdvi_writeq_raw(AMDVIState *s, uint64_t val, hwaddr addr)
+static void amdvi_writeq_raw(AMDVIState *s, hwaddr addr, uint64_t val)
 {
     stq_le_p(&s->mmior[addr], val);
 }
@@ -382,7 +382,7 @@ static void amdvi_completion_wait(AMDVIState *s, uint64_t *cmd)
     }
     /* set completion interrupt */
     if (extract64(cmd[0], 1, 1)) {
-        amdvi_test_mask(s, AMDVI_MMIO_STATUS, AMDVI_MMIO_STATUS_COMP_INT);
+        amdvi_assign_orq(s, AMDVI_MMIO_STATUS, AMDVI_MMIO_STATUS_COMP_INT);
         /* generate interrupt */
         amdvi_generate_msi_interrupt(s);
     }
@@ -553,7 +553,7 @@ static void amdvi_cmdbuf_run(AMDVIState *s)
         trace_amdvi_command_exec(s->cmdbuf_head, s->cmdbuf_tail, s->cmdbuf);
         amdvi_cmdbuf_exec(s);
         s->cmdbuf_head += AMDVI_COMMAND_SIZE;
-        amdvi_writeq_raw(s, s->cmdbuf_head, AMDVI_MMIO_COMMAND_HEAD);
+        amdvi_writeq_raw(s, AMDVI_MMIO_COMMAND_HEAD, s->cmdbuf_head);
 
         /* wrap head pointer */
         if (s->cmdbuf_head >= s->cmdbuf_len * AMDVI_COMMAND_SIZE) {
@@ -860,8 +860,8 @@ static inline uint8_t get_pte_translation_mode(uint64_t pte)
 
 static inline uint64_t pte_override_page_mask(uint64_t pte)
 {
-    uint8_t page_mask = 12;
-    uint64_t addr = (pte & AMDVI_DEV_PT_ROOT_MASK) ^ AMDVI_DEV_PT_ROOT_MASK;
+    uint8_t page_mask = 13;
+    uint64_t addr = (pte & AMDVI_DEV_PT_ROOT_MASK) >> 12;
     /* find the first zero bit */
     while (addr & 1) {
         page_mask++;
diff --git a/hw/i386/fw_cfg.c b/hw/i386/fw_cfg.c
index e48a54f..4e68d5d 100644
--- a/hw/i386/fw_cfg.c
+++ b/hw/i386/fw_cfg.c
@@ -22,6 +22,7 @@
 #include "hw/nvram/fw_cfg.h"
 #include "e820_memory_layout.h"
 #include "kvm/kvm_i386.h"
+#include "qapi/error.h"
 #include CONFIG_DEVICES
 
 struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
@@ -78,7 +79,8 @@ void fw_cfg_build_smbios(MachineState *ms, FWCfgState *fw_cfg)
     }
     smbios_get_tables(ms, mem_array, array_count,
                       &smbios_tables, &smbios_tables_len,
-                      &smbios_anchor, &smbios_anchor_len);
+                      &smbios_anchor, &smbios_anchor_len,
+                      &error_fatal);
     g_free(mem_array);
 
     if (smbios_anchor) {
diff --git a/hw/input/virtio-input-host.c b/hw/input/virtio-input-host.c
index 85daf73..137efba 100644
--- a/hw/input/virtio-input-host.c
+++ b/hw/input/virtio-input-host.c
@@ -193,13 +193,16 @@ static void virtio_input_host_handle_status(VirtIOInput *vinput,
 {
     VirtIOInputHost *vih = VIRTIO_INPUT_HOST(vinput);
     struct input_event evdev;
+    struct timeval tval;
     int rc;
 
-    if (gettimeofday(&evdev.time, NULL)) {
+    if (gettimeofday(&tval, NULL)) {
         perror("virtio_input_host_handle_status: gettimeofday");
         return;
     }
 
+    evdev.input_event_sec = tval.tv_sec;
+    evdev.input_event_usec = tval.tv_usec;
     evdev.type = le16_to_cpu(event->type);
     evdev.code = le16_to_cpu(event->code);
     evdev.value = le32_to_cpu(event->value);
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 12b655e..a3a2560 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -34,6 +34,16 @@
 
 static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
 
+static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp)
+{
+    if (!dimm->hostmem) {
+        error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
+        return NULL;
+    }
+
+    return host_memory_backend_get_memory(dimm->hostmem);
+}
+
 void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine,
                       const uint64_t *legacy_align, Error **errp)
 {
@@ -66,9 +76,8 @@ void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine,
 
 void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine)
 {
-    PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
-    MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
-                                                              &error_abort);
+    MemoryRegion *vmstate_mr = pc_dimm_get_memory_region(dimm,
+                                                         &error_abort);
 
     memory_device_plug(MEMORY_DEVICE(dimm), machine);
     vmstate_register_ram(vmstate_mr, DEVICE(dimm));
@@ -76,9 +85,8 @@ void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine)
 
 void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine)
 {
-    PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
-    MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
-                                                              &error_abort);
+    MemoryRegion *vmstate_mr = pc_dimm_get_memory_region(dimm,
+                                                         &error_abort);
 
     memory_device_unplug(MEMORY_DEVICE(dimm), machine);
     vmstate_unregister_ram(vmstate_mr, DEVICE(dimm));
@@ -205,16 +213,6 @@ static void pc_dimm_unrealize(DeviceState *dev)
     host_memory_backend_set_mapped(dimm->hostmem, false);
 }
 
-static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp)
-{
-    if (!dimm->hostmem) {
-        error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
-        return NULL;
-    }
-
-    return host_memory_backend_get_memory(dimm->hostmem);
-}
-
 static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
 {
     return object_property_get_uint(OBJECT(md), PC_DIMM_ADDR_PROP,
@@ -266,7 +264,6 @@ static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md,
 static void pc_dimm_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
-    PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
     MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
 
     dc->realize = pc_dimm_realize;
@@ -274,8 +271,6 @@ static void pc_dimm_class_init(ObjectClass *oc, void *data)
     device_class_set_props(dc, pc_dimm_properties);
     dc->desc = "DIMM memory module";
 
-    ddc->get_vmstate_memory_region = pc_dimm_get_memory_region;
-
     mdc->get_addr = pc_dimm_md_get_addr;
     mdc->set_addr = pc_dimm_md_set_addr;
     /* for a dimm plugged_size == region_size */
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 66b9ff4..6b7e8dd 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -89,7 +89,7 @@
                                          VIRTIO_NET_RSS_HASH_TYPE_TCP_EX | \
                                          VIRTIO_NET_RSS_HASH_TYPE_UDP_EX)
 
-static VirtIOFeature feature_sizes[] = {
+static const VirtIOFeature feature_sizes[] = {
     {.flags = 1ULL << VIRTIO_NET_F_MAC,
      .end = endof(struct virtio_net_config, mac)},
     {.flags = 1ULL << VIRTIO_NET_F_STATUS,
diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c
index 4ad8793..28e0032 100644
--- a/hw/scsi/virtio-scsi-dataplane.c
+++ b/hw/scsi/virtio-scsi-dataplane.c
@@ -94,8 +94,7 @@ static bool virtio_scsi_data_plane_handle_event(VirtIODevice *vdev,
     return progress;
 }
 
-static int virtio_scsi_vring_init(VirtIOSCSI *s, VirtQueue *vq, int n,
-                                  VirtIOHandleAIOOutput fn)
+static int virtio_scsi_set_host_notifier(VirtIOSCSI *s, VirtQueue *vq, int n)
 {
     BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s)));
     int rc;
@@ -109,7 +108,6 @@ static int virtio_scsi_vring_init(VirtIOSCSI *s, VirtQueue *vq, int n,
         return rc;
     }
 
-    virtio_queue_aio_set_host_notifier_handler(vq, s->ctx, fn);
     return 0;
 }
 
@@ -154,40 +152,55 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
         goto fail_guest_notifiers;
     }
 
-    aio_context_acquire(s->ctx);
-    rc = virtio_scsi_vring_init(s, vs->ctrl_vq, 0,
-                                virtio_scsi_data_plane_handle_ctrl);
-    if (rc) {
-        goto fail_vrings;
+    memory_region_transaction_begin();
+
+    rc = virtio_scsi_set_host_notifier(s, vs->ctrl_vq, 0);
+    if (rc != 0) {
+        goto fail_host_notifiers;
     }
 
     vq_init_count++;
-    rc = virtio_scsi_vring_init(s, vs->event_vq, 1,
-                                virtio_scsi_data_plane_handle_event);
-    if (rc) {
-        goto fail_vrings;
+    rc = virtio_scsi_set_host_notifier(s, vs->event_vq, 1);
+    if (rc != 0) {
+        goto fail_host_notifiers;
     }
 
     vq_init_count++;
+
     for (i = 0; i < vs->conf.num_queues; i++) {
-        rc = virtio_scsi_vring_init(s, vs->cmd_vqs[i], i + 2,
-                                    virtio_scsi_data_plane_handle_cmd);
+        rc = virtio_scsi_set_host_notifier(s, vs->cmd_vqs[i], i + 2);
         if (rc) {
-            goto fail_vrings;
+            goto fail_host_notifiers;
         }
         vq_init_count++;
     }
 
+    memory_region_transaction_commit();
+
+    aio_context_acquire(s->ctx);
+    virtio_queue_aio_set_host_notifier_handler(vs->ctrl_vq, s->ctx,
+                                            virtio_scsi_data_plane_handle_ctrl);
+    virtio_queue_aio_set_host_notifier_handler(vs->event_vq, s->ctx,
+                                           virtio_scsi_data_plane_handle_event);
+
+    for (i = 0; i < vs->conf.num_queues; i++) {
+        virtio_queue_aio_set_host_notifier_handler(vs->cmd_vqs[i], s->ctx,
+                                             virtio_scsi_data_plane_handle_cmd);
+    }
+
     s->dataplane_starting = false;
     s->dataplane_started = true;
     aio_context_release(s->ctx);
     return 0;
 
-fail_vrings:
-    aio_wait_bh_oneshot(s->ctx, virtio_scsi_dataplane_stop_bh, s);
-    aio_context_release(s->ctx);
+fail_host_notifiers:
     for (i = 0; i < vq_init_count; i++) {
         virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
+    }
+
+    memory_region_transaction_commit();
+
+    for (i = 0; i < vq_init_count; i++) {
         virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
     }
     k->set_guest_notifiers(qbus->parent, vs->conf.num_queues + 2, false);
@@ -225,8 +238,15 @@ void virtio_scsi_dataplane_stop(VirtIODevice *vdev)
 
     blk_drain_all(); /* ensure there are no in-flight requests */
 
+    memory_region_transaction_begin();
+
     for (i = 0; i < vs->conf.num_queues + 2; i++) {
         virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
+    }
+
+    memory_region_transaction_commit();
+
+    for (i = 0; i < vs->conf.num_queues + 2; i++) {
         virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
     }
 
diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c
index f22c4f5..7397e56 100644
--- a/hw/smbios/smbios.c
+++ b/hw/smbios/smbios.c
@@ -27,6 +27,7 @@
 #include "hw/firmware/smbios.h"
 #include "hw/loader.h"
 #include "hw/boards.h"
+#include "hw/pci/pci_bus.h"
 #include "smbios_build.h"
 
 /* legacy structures and constants for <= 2.0 machines */
@@ -118,6 +119,28 @@ static struct {
     uint16_t speed;
 } type17;
 
+static QEnumLookup type41_kind_lookup = {
+    .array = (const char *const[]) {
+        "other",
+        "unknown",
+        "video",
+        "scsi",
+        "ethernet",
+        "tokenring",
+        "sound",
+        "pata",
+        "sata",
+        "sas",
+    },
+    .size = 10
+};
+struct type41_instance {
+    const char *designation, *pcidev;
+    uint8_t instance, kind;
+    QTAILQ_ENTRY(type41_instance) next;
+};
+static QTAILQ_HEAD(, type41_instance) type41 = QTAILQ_HEAD_INITIALIZER(type41);
+
 static QemuOptsList qemu_smbios_opts = {
     .name = "smbios",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_smbios_opts.head),
@@ -358,6 +381,32 @@ static const QemuOptDesc qemu_smbios_type17_opts[] = {
     { /* end of list */ }
 };
 
+static const QemuOptDesc qemu_smbios_type41_opts[] = {
+    {
+        .name = "type",
+        .type = QEMU_OPT_NUMBER,
+        .help = "SMBIOS element type",
+    },{
+        .name = "designation",
+        .type = QEMU_OPT_STRING,
+        .help = "reference designation string",
+    },{
+        .name = "kind",
+        .type = QEMU_OPT_STRING,
+        .help = "device type",
+        .def_value_str = "other",
+    },{
+        .name = "instance",
+        .type = QEMU_OPT_NUMBER,
+        .help = "device type instance",
+    },{
+        .name = "pcidev",
+        .type = QEMU_OPT_STRING,
+        .help = "PCI device",
+    },
+    { /* end of list */ }
+};
+
 static void smbios_register_config(void)
 {
     qemu_add_opts(&qemu_smbios_opts);
@@ -773,6 +822,53 @@ static void smbios_build_type_32_table(void)
     SMBIOS_BUILD_TABLE_POST;
 }
 
+static void smbios_build_type_41_table(Error **errp)
+{
+    unsigned instance = 0;
+    struct type41_instance *t41;
+
+    QTAILQ_FOREACH(t41, &type41, next) {
+        SMBIOS_BUILD_TABLE_PRE(41, 0x2900 + instance, true);
+
+        SMBIOS_TABLE_SET_STR(41, reference_designation_str, t41->designation);
+        t->device_type = t41->kind;
+        t->device_type_instance = t41->instance;
+        t->segment_group_number = cpu_to_le16(0);
+        t->bus_number = 0;
+        t->device_number = 0;
+
+        if (t41->pcidev) {
+            PCIDevice *pdev = NULL;
+            int rc = pci_qdev_find_device(t41->pcidev, &pdev);
+            if (rc != 0) {
+                error_setg(errp,
+                           "No PCI device %s for SMBIOS type 41 entry %s",
+                           t41->pcidev, t41->designation);
+                return;
+            }
+            /*
+             * We only handle the case were the device is attached to
+             * the PCI root bus. The general case is more complex as
+             * bridges are enumerated later and the table would need
+             * to be updated at this moment.
+             */
+            if (!pci_bus_is_root(pci_get_bus(pdev))) {
+                error_setg(errp,
+                           "Cannot create type 41 entry for PCI device %s: "
+                           "not attached to the root bus",
+                           t41->pcidev);
+                return;
+            }
+            t->segment_group_number = cpu_to_le16(0);
+            t->bus_number = pci_dev_bus_num(pdev);
+            t->device_number = pdev->devfn;
+        }
+
+        SMBIOS_BUILD_TABLE_POST;
+        instance++;
+    }
+}
+
 static void smbios_build_type_127_table(void)
 {
     SMBIOS_BUILD_TABLE_PRE(127, 0x7F00, true); /* required */
@@ -883,7 +979,8 @@ void smbios_get_tables(MachineState *ms,
                        const struct smbios_phys_mem_area *mem_array,
                        const unsigned int mem_array_size,
                        uint8_t **tables, size_t *tables_len,
-                       uint8_t **anchor, size_t *anchor_len)
+                       uint8_t **anchor, size_t *anchor_len,
+                       Error **errp)
 {
     unsigned i, dimm_cnt;
 
@@ -928,6 +1025,7 @@ void smbios_get_tables(MachineState *ms,
 
         smbios_build_type_32_table();
         smbios_build_type_38_table();
+        smbios_build_type_41_table(errp);
         smbios_build_type_127_table();
 
         smbios_validate_table(ms);
@@ -1224,6 +1322,30 @@ void smbios_entry_add(QemuOpts *opts, Error **errp)
             save_opt(&type17.part, opts, "part");
             type17.speed = qemu_opt_get_number(opts, "speed", 0);
             return;
+        case 41: {
+            struct type41_instance *t;
+            Error *local_err = NULL;
+
+            if (!qemu_opts_validate(opts, qemu_smbios_type41_opts, errp)) {
+                return;
+            }
+            t = g_new0(struct type41_instance, 1);
+            save_opt(&t->designation, opts, "designation");
+            t->kind = qapi_enum_parse(&type41_kind_lookup,
+                                      qemu_opt_get(opts, "kind"),
+                                      0, &local_err) + 1;
+            t->kind |= 0x80;     /* enabled */
+            if (local_err != NULL) {
+                error_propagate(errp, local_err);
+                g_free(t);
+                return;
+            }
+            t->instance = qemu_opt_get_number(opts, "instance", 1);
+            save_opt(&t->pcidev, opts, "pcidev");
+
+            QTAILQ_INSERT_TAIL(&type41, t, next);
+            return;
+        }
         default:
             error_setg(errp,
                        "Don't know how to build fields for SMBIOS type %ld",
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 01d2101..8f2fb9f 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -371,8 +371,8 @@ static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev)
     return 0;
 }
 
-int vhost_vdpa_get_device_id(struct vhost_dev *dev,
-                                   uint32_t *device_id)
+static int vhost_vdpa_get_device_id(struct vhost_dev *dev,
+                                    uint32_t *device_id)
 {
     int ret;
     ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_DEVICE_ID, device_id);
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 342c918..5952471 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -36,7 +36,9 @@
 
 static bool virtio_mmio_ioeventfd_enabled(DeviceState *d)
 {
-    return kvm_eventfds_enabled();
+    VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
+
+    return (proxy->flags & VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD) != 0;
 }
 
 static int virtio_mmio_ioeventfd_assign(DeviceState *d,
@@ -720,6 +722,8 @@ static Property virtio_mmio_properties[] = {
     DEFINE_PROP_BOOL("format_transport_address", VirtIOMMIOProxy,
                      format_transport_address, true),
     DEFINE_PROP_BOOL("force-legacy", VirtIOMMIOProxy, legacy, true),
+    DEFINE_PROP_BIT("ioeventfd", VirtIOMMIOProxy, flags,
+                    VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD_BIT, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -731,6 +735,11 @@ static void virtio_mmio_realizefn(DeviceState *d, Error **errp)
     qbus_create_inplace(&proxy->bus, sizeof(proxy->bus), TYPE_VIRTIO_MMIO_BUS,
                         d, NULL);
     sysbus_init_irq(sbd, &proxy->irq);
+
+    if (!kvm_eventfds_enabled()) {
+        proxy->flags &= ~VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD;
+    }
+
     if (proxy->legacy) {
         memory_region_init_io(&proxy->iomem, OBJECT(d),
                               &virtio_legacy_mem_ops, proxy,
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 9e13cb9..e02544b 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2981,7 +2981,7 @@ int virtio_set_features(VirtIODevice *vdev, uint64_t val)
     return ret;
 }
 
-size_t virtio_feature_get_config_size(VirtIOFeature *feature_sizes,
+size_t virtio_feature_get_config_size(const VirtIOFeature *feature_sizes,
                                       uint64_t host_features)
 {
     size_t config_size = 0;