Re: [libvirt][PATCH RESEND v10 1/5] qemu: provide support to query the SGX capability

QEMU version >= 6.2.0 provides support for creating enclave on SGX x86 platform using Software Guard Extensions (SGX) feature. This patch adds support to query the SGX capability from the qemu. Signed-off-by: Haibin Huang <haibin.huang(a)intel.com&gt; --- src/conf/domain_capabilities.c | 10 ++ src/conf/domain_capabilities.h | 13 ++ src/libvirt_private.syms | 1 + src/qemu/qemu_capabilities.c | 113 ++++++++++++++++++ src/qemu/qemu_capabilities.h | 4 + src/qemu/qemu_capspriv.h | 4 + src/qemu/qemu_monitor.c | 10 ++ src/qemu/qemu_monitor.h | 3 + src/qemu/qemu_monitor_json.c | 72 +++++++++++ src/qemu/qemu_monitor_json.h | 9 ++ .../caps_6.2.0.x86_64.replies | 22 +++- .../caps_6.2.0.x86_64.xml | 5 + .../caps_7.0.0.x86_64.replies | 22 +++- .../caps_7.0.0.x86_64.xml | 5 + 14 files changed, 285 insertions(+), 8 deletions(-) diff --git a/src/conf/domain_capabilities.c b/src/conf/domain_capabilities.c index c394a7a390..1170fd26df 100644 --- a/src/conf/domain_capabilities.c +++ b/src/conf/domain_capabilities.c @@ -78,6 +78,16 @@ virSEVCapabilitiesFree(virSEVCapability *cap) } +void +virSGXCapabilitiesFree(virSGXCapability *cap) +{ + if (!cap) + return; + + VIR_FREE(cap); +} + + static void virDomainCapsDispose(void *obj) { diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h index 1d2f4ac7a5..973d543ce8 100644 --- a/src/conf/domain_capabilities.h +++ b/src/conf/domain_capabilities.h @@ -191,6 +191,13 @@ struct _virSEVCapability { unsigned int max_es_guests; }; +typedef struct _virSGXCapability virSGXCapability; +typedef virSGXCapability *virSGXCapabilityPtr; +struct _virSGXCapability { + bool flc; + unsigned int epc_size; +}; + typedef enum { VIR_DOMAIN_CAPS_FEATURE_IOTHREADS = 0, VIR_DOMAIN_CAPS_FEATURE_VMCOREINFO, @@ -227,6 +234,7 @@ struct _virDomainCaps { virDomainCapsFeatureGIC gic; virSEVCapability *sev; + virSGXCapability *sgx; /* add new domain features here */ virTristateBool features[VIR_DOMAIN_CAPS_FEATURE_LAST]; @@ -275,3 +283,8 @@ void virSEVCapabilitiesFree(virSEVCapability *capabilities); G_DEFINE_AUTOPTR_CLEANUP_FUNC(virSEVCapability, virSEVCapabilitiesFree); + +void +virSGXCapabilitiesFree(virSGXCapability *capabilities); + +G_DEFINE_AUTOPTR_CLEANUP_FUNC(virSGXCapability, virSGXCapabilitiesFree); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index ba3462d849..0e74e4f20e 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -219,6 +219,7 @@ virDomainCapsEnumSet; virDomainCapsFormat; virDomainCapsNew; virSEVCapabilitiesFree; +virSGXCapabilitiesFree; # conf/domain_conf.h diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 1b28c3f161..0e43dd2466 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -663,6 +663,7 @@ VIR_ENUM_IMPL(virQEMUCaps, "device.json+hotplug", /* QEMU_CAPS_DEVICE_JSON */ "hvf", /* QEMU_CAPS_HVF */ "virtio-mem-pci.prealloc", /* QEMU_CAPS_DEVICE_VIRTIO_MEM_PCI_PREALLOC */ + "sgx-epc", /* QEMU_CAPS_SGX_EPC */ ); @@ -744,6 +745,8 @@ struct _virQEMUCaps { virSEVCapability *sevCapabilities; + virSGXCapability *sgxCapabilities; + /* Capabilities which may differ depending on the accelerator. */ virQEMUCapsAccel kvm; virQEMUCapsAccel hvf; @@ -1398,6 +1401,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = { { "virtio-vga-gl", QEMU_CAPS_VIRTIO_VGA_GL }, { "s390-pv-guest", QEMU_CAPS_S390_PV_GUEST }, { "virtio-mem-pci", QEMU_CAPS_DEVICE_VIRTIO_MEM_PCI }, + { "sgx-epc", QEMU_CAPS_SGX_EPC }, }; @@ -1962,6 +1966,22 @@ virQEMUCapsSEVInfoCopy(virSEVCapability **dst, } +static int +virQEMUCapsSGXInfoCopy(virSGXCapabilityPtr *dst, + virSGXCapabilityPtr src) +{ + g_autoptr(virSGXCapability) tmp = NULL; + + tmp = g_new0(virSGXCapability, 1); + + tmp->flc = src->flc; + tmp->epc_size = src->epc_size; + + *dst = g_steal_pointer(&tmp); + return 0; +} + + static void virQEMUCapsAccelCopyMachineTypes(virQEMUCapsAccel *dst, virQEMUCapsAccel *src) @@ -2043,6 +2063,12 @@ virQEMUCaps *virQEMUCapsNewCopy(virQEMUCaps *qemuCaps) qemuCaps->sevCapabilities) < 0) return NULL; + + if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_SGX_EPC) && + virQEMUCapsSGXInfoCopy(&ret->sgxCapabilities, + qemuCaps->sgxCapabilities) < 0) + return NULL; + return g_steal_pointer(&ret); } @@ -2606,6 +2632,13 @@ virQEMUCapsGetSEVCapabilities(virQEMUCaps *qemuCaps) } +virSGXCapabilityPtr +virQEMUCapsGetSGXCapabilities(virQEMUCaps *qemuCaps) +{ + return qemuCaps->sgxCapabilities; +} + + static int virQEMUCapsProbeQMPCommands(virQEMUCaps *qemuCaps, qemuMonitor *mon) @@ -3441,6 +3474,31 @@ virQEMUCapsProbeQMPSEVCapabilities(virQEMUCaps *qemuCaps, } +static int +virQEMUCapsProbeQMPSGXCapabilities(virQEMUCaps *qemuCaps, + qemuMonitor *mon) +{ + int rc = -1; + virSGXCapability *caps = NULL; + + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_SGX_EPC)) + return 0; + + if ((rc = qemuMonitorGetSGXCapabilities(mon, &caps)) < 0) + return -1; + + /* SGX isn't actually supported */ + if (rc == 0) { + virQEMUCapsClear(qemuCaps, QEMU_CAPS_SGX_EPC); + return 0; + } + + virSGXCapabilitiesFree(qemuCaps->sgxCapabilities); + qemuCaps->sgxCapabilities = caps; + return 0; +} + + /* * Filter for features which should never be passed to QEMU. Either because * QEMU never supported them or they were dropped as they never did anything @@ -4219,6 +4277,39 @@ virQEMUCapsParseSEVInfo(virQEMUCaps *qemuCaps, xmlXPathContextPtr ctxt) } +static int +virQEMUCapsParseSGXInfo(virQEMUCaps *qemuCaps, xmlXPathContextPtr ctxt)

+{ + g_autoptr(virSGXCapability) sgx = NULL; + + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_SGX_EPC)) + return 0; + + if (virXPathBoolean("boolean(./sgx)", ctxt) == 0) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("missing SGX platform data in QEMU capabilities cache")); + return -1; + } + + sgx = g_new0(virSGXCapability, 1); + + if (virXPathBoolean("boolean(./sgx/flc)", ctxt) == 0) {

+ virReportError(VIR_ERR_XML_ERROR, "%s", + _("missing SGX platform flc in QEMU capabilities cache")); + return -1; + } + + if (virXPathUInt("string(./sgx/epc_size)", ctxt, &sgx->epc_size) < 0) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("missing or malformed SGX platform epc_size in QEMU capabilities cache")); + return -1; + } + + qemuCaps->sgxCapabilities = g_steal_pointer(&sgx); + return 0; +} + + static int virQEMUCapsParseFlags(virQEMUCaps *qemuCaps, xmlXPathContextPtr ctxt) { @@ -4521,6 +4612,9 @@ virQEMUCapsLoadCache(virArch hostArch, if (virQEMUCapsParseSEVInfo(qemuCaps, ctxt) < 0) return -1; + if (virQEMUCapsParseSGXInfo(qemuCaps, ctxt) < 0) + return -1; + if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM)) virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_KVM); if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_HVF)) @@ -4701,6 +4795,20 @@ virQEMUCapsFormatSEVInfo(virQEMUCaps *qemuCaps, virBuffer *buf) } +static void +virQEMUCapsFormatSGXInfo(virQEMUCaps *qemuCaps, virBuffer *buf) +{ + virSGXCapabilityPtr sgx = virQEMUCapsGetSGXCapabilities(qemuCaps); + + virBufferAddLit(buf, "<sgx>\n"); + virBufferAdjustIndent(buf, 2); + virBufferAsprintf(buf, "<flc>%s</flc>\n", sgx->flc ? "yes" : "no");

+ virBufferAsprintf(buf, "<epc_size>%u</epc_size>\n", sgx->epc_size); + virBufferAdjustIndent(buf, -2); + virBufferAddLit(buf, "</sgx>\n"); +} + + char * virQEMUCapsFormatCache(virQEMUCaps *qemuCaps) { @@ -4782,6 +4890,9 @@ virQEMUCapsFormatCache(virQEMUCaps *qemuCaps) if (qemuCaps->sevCapabilities) virQEMUCapsFormatSEVInfo(qemuCaps, &buf); + if (qemuCaps->sgxCapabilities) + virQEMUCapsFormatSGXInfo(qemuCaps, &buf); + if (qemuCaps->kvmSupportsNesting) virBufferAddLit(&buf, "<kvmSupportsNesting/>\n"); @@ -5466,6 +5577,8 @@ virQEMUCapsInitQMPMonitor(virQEMUCaps *qemuCaps, return -1; if (virQEMUCapsProbeQMPSEVCapabilities(qemuCaps, mon) < 0) return -1; + if (virQEMUCapsProbeQMPSGXCapabilities(qemuCaps, mon) < 0) + return -1; virQEMUCapsInitProcessCaps(qemuCaps); diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 6ff0b7a78b..a630676d6c 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -638,6 +638,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */ QEMU_CAPS_DEVICE_JSON, /* -device accepts JSON (and works with hot-unplug) */ QEMU_CAPS_HVF, /* Whether Hypervisor.framework is available */ QEMU_CAPS_DEVICE_VIRTIO_MEM_PCI_PREALLOC, /* -device virtio-mem-pci.prealloc= */ + QEMU_CAPS_SGX_EPC, /* -object sgx-epc,... */ QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; @@ -831,6 +832,9 @@ virQEMUCapsCPUFeatureFromQEMU(virQEMUCaps *qemuCaps, virSEVCapability * virQEMUCapsGetSEVCapabilities(virQEMUCaps *qemuCaps); +virSGXCapabilityPtr +virQEMUCapsGetSGXCapabilities(virQEMUCaps *qemuCaps); + bool virQEMUCapsGetKVMSupportsSecureGuest(virQEMUCaps *qemuCaps) G_GNUC_NO_INLINE; diff --git a/src/qemu/qemu_capspriv.h b/src/qemu/qemu_capspriv.h index f4f4a99d32..c632647a74 100644 --- a/src/qemu/qemu_capspriv.h +++ b/src/qemu/qemu_capspriv.h @@ -101,6 +101,10 @@ void virQEMUCapsSetSEVCapabilities(virQEMUCaps *qemuCaps, virSEVCapability *capabilities); +void +virQEMUCapsSetSGXCapabilities(virQEMUCaps *qemuCaps, + virSGXCapability *capabilities); + int virQEMUCapsProbeCPUDefinitionsTest(virQEMUCaps *qemuCaps, qemuMonitor *mon); diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index babf9e62fb..c54cca2406 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -3719,6 +3719,16 @@ qemuMonitorGetSEVCapabilities(qemuMonitor *mon, } +int +qemuMonitorGetSGXCapabilities(qemuMonitor *mon, + virSGXCapability **capabilities) +{ + QEMU_CHECK_MONITOR(mon); + + return qemuMonitorJSONGetSGXCapabilities(mon, capabilities); +} + + int qemuMonitorNBDServerStart(qemuMonitor *mon, const virStorageNetHostDef *server, diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index 9b2e4e1421..4e85dcb548 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -920,6 +920,9 @@ int qemuMonitorGetGICCapabilities(qemuMonitor *mon, int qemuMonitorGetSEVCapabilities(qemuMonitor *mon, virSEVCapability **capabilities); +int qemuMonitorGetSGXCapabilities(qemuMonitor *mon, + virSGXCapability **capabilities); + typedef enum { QEMU_MONITOR_MIGRATE_BACKGROUND = 1 << 0, QEMU_MONITOR_MIGRATE_NON_SHARED_DISK = 1 << 1, /* migration with non-shared storage with full disk copy */ diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index b0b513683b..811db233c4 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -6493,6 +6493,78 @@ qemuMonitorJSONGetSEVCapabilities(qemuMonitor *mon, return 1; } +/** + * qemuMonitorJSONGetSGXCapabilities: + * @mon: qemu monitor object + * @capabilities: pointer to pointer to a SGX capability structure to be filled + * + * This function queries and fills in INTEL's SGX platform-specific data. + * Note that from QEMU's POV both -object sgx-epc and query-sgx-capabilities + * can be present even if SGX is not available, which basically leaves us with + * checking for JSON "GenericError" in order to differentiate between compiled-in + * support and actual SGX support on the platform. + * + * Returns -1 on error, 0 if SGX is not supported, and 1 if SGX is supported on + * the platform. + */ +int +qemuMonitorJSONGetSGXCapabilities(qemuMonitor *mon, + virSGXCapability **capabilities) +{ + int ret = -1;

+ g_autoptr(virJSONValue) cmd = NULL; + g_autoptr(virJSONValue) reply = NULL; + virJSONValue *caps; + bool flc = false; + unsigned int section_size = 0; + g_autoptr(virSGXCapability) capability = NULL; + + *capabilities = NULL; + + if (!(cmd = qemuMonitorJSONMakeCommand("query-sgx-capabilities", NULL))) + return -1; + + if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0) + goto cleanup; + + /* QEMU has only compiled-in support of SGX */ + if (qemuMonitorJSONHasError(reply, "GenericError")) { + ret = 0; + goto cleanup; + } + + if (qemuMonitorJSONCheckError(cmd, reply) < 0) + goto cleanup; + + caps = virJSONValueObjectGetObject(reply, "return"); + + if (virJSONValueObjectGetBoolean(caps, "flc", &flc) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("query-sgx-capabilities reply was missing" + " 'flc' field")); + goto cleanup; + } + + if (virJSONValueObjectGetNumberUint(caps, "section-size", &section_size) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("query-sgx-capabilities reply was missing" + " 'section-size' field")); + goto cleanup; + } + + capability = g_new0(virSGXCapability, 1); + + capability->flc = flc; + + capability->epc_size = section_size/1024; + *capabilities = g_steal_pointer(&capability); + ret = 1; + + cleanup: + + return ret;

+} +