This option turns on extended interrupt mode, which allows more than 255 vCPUs. https://bugzilla.redhat.com/show_bug.cgi?id=1451282 --- src/qemu/qemu_capabilities.c | 2 ++ src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_command.c | 11 +++++++++++ src/qemu/qemu_domain.c | 20 ++++++++++++++++++++ tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml | 1 + tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml | 1 + .../qemuxml2argv-intel-iommu-eim.args | 19 +++++++++++++++++++ tests/qemuxml2argvtest.c | 7 +++++++ 8 files changed, 62 insertions(+) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-eim.args diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 546dfd7..7ea8505 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -371,6 +371,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "kernel-irqchip.split", "intel-iommu.intremap", "intel-iommu.caching-mode", + "intel-iommu.eim", ); @@ -1728,6 +1729,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsUSBNECXHCI[] = { static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsIntelIOMMU[] = { { "intremap", QEMU_CAPS_INTEL_IOMMU_INTREMAP }, { "caching-mode", QEMU_CAPS_INTEL_IOMMU_CACHING_MODE }, + { "eim", QEMU_CAPS_INTEL_IOMMU_EIM }, }; /* see documentation for virQEMUCapsQMPSchemaGetByPath for the query format */ diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index aa99fda..eba9814 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -409,6 +409,7 @@ typedef enum { QEMU_CAPS_MACHINE_KERNEL_IRQCHIP_SPLIT, /* -machine kernel_irqchip=split */ QEMU_CAPS_INTEL_IOMMU_INTREMAP, /* intel-iommu.intremap */ QEMU_CAPS_INTEL_IOMMU_CACHING_MODE, /* intel-iommu.caching-mode */ + QEMU_CAPS_INTEL_IOMMU_EIM, /* intel-iommu.eim */ QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 4c1a266..f190d51 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6701,6 +6701,13 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd, "with this QEMU binary")); return -1; } + if (iommu->eim != VIR_TRISTATE_SWITCH_ABSENT && + !virQEMUCapsGet(qemuCaps, QEMU_CAPS_INTEL_IOMMU_EIM)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("iommu: eim is not supported " + "with this QEMU binary")); + return -1; + } break; case VIR_DOMAIN_IOMMU_MODEL_LAST: break; @@ -6734,6 +6741,10 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd, virBufferAsprintf(&opts, ",caching-mode=%s", virTristateSwitchTypeToString(iommu->caching_mode)); } + if (iommu->eim != VIR_TRISTATE_SWITCH_ABSENT) { + virBufferAsprintf(&opts, ",eim=%s", + virTristateSwitchTypeToString(iommu->eim)); + } case VIR_DOMAIN_IOMMU_MODEL_LAST: break; } diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 7c54f69..cd1825e 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -2663,6 +2663,9 @@ qemuDomainRecheckInternalPaths(virDomainDefPtr def, } +#define QEMU_MAX_VCPUS_WITHOUT_EIM 255 + + static int qemuDomainDefVcpusPostParse(virDomainDefPtr def) { @@ -3071,6 +3074,23 @@ qemuDomainDefValidate(const virDomainDef *def, } } + if (ARCH_IS_X86(def->os.arch) && + virDomainDefGetVcpusMax(def) > QEMU_MAX_VCPUS_WITHOUT_EIM) { + if (!qemuDomainIsQ35(def)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("more than %d vCPUs are only supported on " + "q35-based machine types"), + QEMU_MAX_VCPUS_WITHOUT_EIM); + goto cleanup; + } + if (!def->iommu || def->iommu->eim != VIR_TRISTATE_SWITCH_ON) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("more than %d vCPUs require extended interrupt " + "mode enabled on the iommu device"), + QEMU_MAX_VCPUS_WITHOUT_EIM); + } + } + if (qemuDomainDefValidateVideo(def) < 0) goto cleanup; diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml index e515678..01edbc8 100644 --- a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml @@ -206,6 +206,7 @@ <flag name='kernel-irqchip'/> <flag name='kernel-irqchip.split'/> <flag name='intel-iommu.intremap'/> + <flag name='intel-iommu.eim'/> <version>2008000</version> <kvmVersion>0</kvmVersion> <package> (v2.8.0)</package> diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml index 19fe4b7..95b04dd 100644 --- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml @@ -214,6 +214,7 @@ <flag name='kernel-irqchip.split'/> <flag name='intel-iommu.intremap'/> <flag name='intel-iommu.caching-mode'/> + <flag name='intel-iommu.eim'/> <version>2009000</version> <kvmVersion>0</kvmVersion> <package> (v2.9.0)</package> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-eim.args b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-eim.args new file mode 100644 index 0000000..ebf7c49 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-eim.args @@ -0,0 +1,19 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/home/test \ +USER=test \ +LOGNAME=test \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-x86_64 \ +-name QEMUGuest1 \ +-S \ +-machine q35,accel=kvm,kernel_irqchip=split \ +-m 214 \ +-smp 288,sockets=288,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-nographic \ +-nodefaults \ +-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \ +-no-acpi \ +-boot c \ +-device intel-iommu,intremap=on,eim=on diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 4269598..b360185 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -2529,6 +2529,13 @@ mymain(void) QEMU_CAPS_DEVICE_INTEL_IOMMU, QEMU_CAPS_INTEL_IOMMU_INTREMAP, QEMU_CAPS_INTEL_IOMMU_CACHING_MODE); + DO_TEST("intel-iommu-eim", + QEMU_CAPS_MACHINE_OPT, + QEMU_CAPS_MACHINE_KERNEL_IRQCHIP, + QEMU_CAPS_MACHINE_KERNEL_IRQCHIP_SPLIT, + QEMU_CAPS_INTEL_IOMMU_INTREMAP, + QEMU_CAPS_INTEL_IOMMU_EIM, + QEMU_CAPS_DEVICE_INTEL_IOMMU); DO_TEST("cpu-hotplug-startup", QEMU_CAPS_QUERY_HOTPLUGGABLE_CPUS); -- 2.10.2 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
