diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/i386/pc.c | 4 | ||||
| -rw-r--r-- | hw/s390x/s390-pci-bus.c | 26 | ||||
| -rw-r--r-- | hw/s390x/s390-pci-kvm.c | 34 | ||||
| -rw-r--r-- | hw/s390x/s390-virtio-ccw.c | 8 |
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) { |