Merge tag 'pull-request-2024-01-19' of https://gitlab.com/thuth/qemu into staging

- Fix s390x ISM reset
- Remove deprecated CLI options -no-hpet, -no-acpi, -async-teardown,
  -chroot and -singlestep
- Fix installation of the netbsd VM

# -----BEGIN PGP SIGNATURE-----
#
# iQJFBAABCAAvFiEEJ7iIR+7gJQEY8+q5LtnXdP5wLbUFAmWqk40RHHRodXRoQHJl
# ZGhhdC5jb20ACgkQLtnXdP5wLbVb+w//XuWdXzDDof0CsOMhMzBaKLznJ+Qbo4Wr
# S5vNJsiJe3KfI3DJa/ZSO2+lwyFpMPjp3aRSm9rAaw2ErejtfGZMSHj5/BGYuHVM
# x0VlHWnTEe/7NpG2mRwlxntPyYOtFCQ+xCo4YS9fpLLYSQFNhGMyOyfCobVZc1/A
# TDFrS5v1Su1HgYNL6GuyXK8k56ytidBxhuYtfLkR01liUDU1rmTWFcLxrXUwI7Hr
# nfamp/W6G9OJ3co0ysYChM8SvXQzCGPBxzGQjrcHpaL7otTW5yliJcNPwyzGdyLU
# G+5AcdJ8wT+ONonf3KkUTbxS2J2OHzIGCZpqVWGU0h5Yv43zMpNATUmbUPM0H0l4
# mqtUf4bSyhNwClKdkEWJyvEwNRTIHxWerMgaNp9ntEM3Ac0/3HiOXV/DZOKL04Im
# hRHRySSMlyo6Pnnn2fHj3naalKHNVikbvPVR3i8wdYuQ423D35cU8M+yJpJ3Bllt
# 5YgScDkVjifan5SmWVdtQ9bgyrdeQHFa9V1iUjxQx5JfAv8w4RBmats8UYrYm/mF
# Zrx/zdpL5wneslWwPqLp/gOb5lt8tF4vt0sLgpNa6SxI9Pgz/GhPvuhmfheML17l
# znbGEx5q3vqivszZkm8penydut4rbpp6GcoftbI9sIgqfNuuY1d/FZRlb32RTdxH
# 1TUiQfGQqbA=
# =ytHA
# -----END PGP SIGNATURE-----
# gpg: Signature made Fri 19 Jan 2024 15:21:49 GMT
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* tag 'pull-request-2024-01-19' of https://gitlab.com/thuth/qemu:
  tests/vm/netbsd: Remove missing py311-expat package
  cli: Remove deprecated '-singlestep' command line option
  hmp: Remove deprecated 'singlestep' command
  qapi: Remove deprecated 'singlestep' member of StatusInfo
  qemu-options: Remove the deprecated -chroot option
  qemu-options: Remove the deprecated -async-teardown option
  qemu-options: Remove the deprecated -no-acpi option
  qemu-options: Remove the deprecated -no-hpet option
  s390x/pci: drive ISM reset from subsystem reset
  s390x/pci: refresh fh before disabling aif
  s390x/pci: avoid double enable/disable of aif

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

4 files changed, 59 insertions, 13 deletions

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 496498d..803244e 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1348,7 +1348,7 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
     Error *local_err = NULL;
 
     /*
-     * When -no-acpi is used with Q35 machine type, no ACPI is built,
+     * When "acpi=off" is used with the Q35 machine type, no ACPI is built,
      * but pcms->acpi_dev is still created. Check !acpi_enabled in
      * addition to cover this case.
      */
@@ -1396,7 +1396,7 @@ static void pc_memory_unplug_request(HotplugHandler *hotplug_dev,
     X86MachineState *x86ms = X86_MACHINE(hotplug_dev);
 
     /*
-     * When -no-acpi is used with Q35 machine type, no ACPI is built,
+     * When "acpi=off" is used with the Q35 machine type, no ACPI is built,
      * but pcms->acpi_dev is still created. Check !acpi_enabled in
      * addition to cover this case.
      */
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 347580e..3e57d5f 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -151,20 +151,12 @@ static void s390_pci_shutdown_notifier(Notifier *n, void *opaque)
     pci_device_reset(pbdev->pdev);
 }
 
-static void s390_pci_reset_cb(void *opaque)
-{
-    S390PCIBusDevice *pbdev = opaque;
-
-    pci_device_reset(pbdev->pdev);
-}
-
 static void s390_pci_perform_unplug(S390PCIBusDevice *pbdev)
 {
     HotplugHandler *hotplug_ctrl;
 
     if (pbdev->pft == ZPCI_PFT_ISM) {
         notifier_remove(&pbdev->shutdown_notifier);
-        qemu_unregister_reset(s390_pci_reset_cb, pbdev);
     }
 
     /* Unplug the PCI device */
@@ -1132,7 +1124,6 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
             if (pbdev->pft == ZPCI_PFT_ISM) {
                 pbdev->shutdown_notifier.notify = s390_pci_shutdown_notifier;
                 qemu_register_shutdown_notifier(&pbdev->shutdown_notifier);
-                qemu_register_reset(s390_pci_reset_cb, pbdev);
             }
         } else {
             pbdev->fh |= FH_SHM_EMUL;
@@ -1279,6 +1270,23 @@ static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev,
     pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1);
 }
 
+void s390_pci_ism_reset(void)
+{
+    S390pciState *s = s390_get_phb();
+
+    S390PCIBusDevice *pbdev, *next;
+
+    /* Trigger reset event for each passthrough ISM device currently in-use */
+    QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) {
+        if (pbdev->interp && pbdev->pft == ZPCI_PFT_ISM &&
+            pbdev->fh & FH_MASK_ENABLE) {
+            s390_pci_kvm_aif_disable(pbdev);
+
+            pci_device_reset(pbdev->pdev);
+        }
+    }
+}
+
 static void s390_pcihost_reset(DeviceState *dev)
 {
     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
diff --git a/hw/s390x/s390-pci-kvm.c b/hw/s390x/s390-pci-kvm.c
index ff41e41..9eef4fc 100644
--- a/hw/s390x/s390-pci-kvm.c
+++ b/hw/s390x/s390-pci-kvm.c
@@ -18,6 +18,7 @@
 #include "hw/s390x/s390-pci-bus.h"
 #include "hw/s390x/s390-pci-kvm.h"
 #include "hw/s390x/s390-pci-inst.h"
+#include "hw/s390x/s390-pci-vfio.h"
 #include "cpu_models.h"
 
 bool s390_pci_kvm_interp_allowed(void)
@@ -27,6 +28,7 @@ bool s390_pci_kvm_interp_allowed(void)
 
 int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)
 {
+    int rc;
     struct kvm_s390_zpci_op args = {
         .fh = pbdev->fh,
         .op = KVM_S390_ZPCIOP_REG_AEN,
@@ -38,15 +40,43 @@ int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)
         .u.reg_aen.flags = (assist) ? 0 : KVM_S390_ZPCIOP_REGAEN_HOST
     };
 
-    return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+    if (pbdev->aif) {
+        return -EINVAL;
+    }
+
+    rc = kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+    if (rc == 0) {
+        pbdev->aif = true;
+    }
+
+    return rc;
 }
 
 int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
 {
+    int rc;
+
     struct kvm_s390_zpci_op args = {
         .fh = pbdev->fh,
         .op = KVM_S390_ZPCIOP_DEREG_AEN
     };
 
-    return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+    if (!pbdev->aif) {
+        return -EINVAL;
+    }
+
+    /*
+     * The device may have already been reset but we still want to relinquish
+     * the guest ISC, so always be sure to use an up-to-date host fh.
+     */
+    if (!s390_pci_get_host_fh(pbdev, &args.fh)) {
+        return -EPERM;
+    }
+
+    rc = kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+    if (rc == 0) {
+        pbdev->aif = false;
+    }
+
+    return rc;
 }
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index eaf61d3..c99682b 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -118,6 +118,14 @@ static void subsystem_reset(void)
     DeviceState *dev;
     int i;
 
+    /*
+     * ISM firmware is sensitive to unexpected changes to the IOMMU, which can
+     * occur during reset of the vfio-pci device (unmap of entire aperture).
+     * Ensure any passthrough ISM devices are reset now, while CPUs are paused
+     * but before vfio-pci cleanup occurs.
+     */
+    s390_pci_ism_reset();
+
     for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
         dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
         if (dev) {