Re: [libvirt] [PATCHv2 6/6] qemu: format caching-mode on iommu command line

Format the caching-mode option for the intel-iommu device, based on its <driver caching> attribute value. https://bugzilla.redhat.com/show_bug.cgi?id=1427005 --- src/qemu/qemu_capabilities.c | 2 ++ src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_command.c | 11 +++++++++++ tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml | 1 + .../qemuxml2argv-intel-iommu-caching.args | 19 +++++++++++++++++++ tests/qemuxml2argvtest.c | 5 +++++ 6 files changed, 39 insertions(+) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.args diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 0c7d7b1..88ea306 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -366,6 +366,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "query-named-block-nodes", "kernel-irqchip", "intel-iommu-intremap",

+ "intel-iommu-caching", ); @@ -1718,6 +1719,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsUSBNECXHCI[] = { static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsIntelIOMMU[] = { { "intremap", QEMU_CAPS_INTEL_IOMMU_INTREMAP }, + { "caching-mode", QEMU_CAPS_INTEL_IOMMU_CACHING }, }; /* see documentation for virQEMUCapsQMPSchemaGetByPath for the query format */ diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 4d19691..2409377 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -403,6 +403,7 @@ typedef enum { QEMU_CAPS_QUERY_NAMED_BLOCK_NODES, /* qmp query-named-block-nodes */ QEMU_CAPS_MACHINE_KERNEL_IRQCHIP, /* -machine kernel_irqchip */ QEMU_CAPS_INTEL_IOMMU_INTREMAP, /* intel-iommu.intremap */

+ QEMU_CAPS_INTEL_IOMMU_CACHING, /* intel-iommu.caching-mode */ 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 1f97bd0..55800c7 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6690,6 +6690,13 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd, "with this QEMU binary")); return -1; } + if (iommu->caching != VIR_TRISTATE_SWITCH_ABSENT && + !virQEMUCapsGet(qemuCaps, QEMU_CAPS_INTEL_IOMMU_CACHING)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("iommu: caching mode is not supported " + "with this QEMU binary")); + return -1; + } break; case VIR_DOMAIN_IOMMU_MODEL_LAST: break; @@ -6719,6 +6726,10 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd, virBufferAsprintf(&opts, ",intremap=%s", virTristateSwitchTypeToString(iommu->intremap)); } + if (iommu->caching != VIR_TRISTATE_SWITCH_ABSENT) { + virBufferAsprintf(&opts, ",caching-mode=%s", + virTristateSwitchTypeToString(iommu->caching)); + } case VIR_DOMAIN_IOMMU_MODEL_LAST: break; } diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml index 799c52a..0193492 100644 --- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml @@ -209,6 +209,7 @@ <flag name='query-named-block-nodes'/> <flag name='kernel-irqchip'/> <flag name='intel-iommu-intremap'/> + <flag name='intel-iommu-caching'/> <version>2008090</version> <kvmVersion>0</kvmVersion> <package> (v2.9.0-rc0-142-g940a8ce)</package> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.args b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.args new file mode 100644 index 0000000..dee63f4 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.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=tcg \ +-m 214 \ +-smp 1,sockets=1,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,caching-mode=on

diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 29cd8b5..9950f7f 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -2497,6 +2497,11 @@ mymain(void) QEMU_CAPS_MACHINE_KERNEL_IRQCHIP, QEMU_CAPS_INTEL_IOMMU_INTREMAP, QEMU_CAPS_DEVICE_INTEL_IOMMU); + DO_TEST("intel-iommu-caching", + QEMU_CAPS_MACHINE_OPT, + QEMU_CAPS_DEVICE_INTEL_IOMMU, + QEMU_CAPS_INTEL_IOMMU_INTREMAP, + QEMU_CAPS_INTEL_IOMMU_CACHING); DO_TEST("cpu-hotplug-startup", QEMU_CAPS_QUERY_HOTPLUGGABLE_CPUS);