QEMU version >= 2.12 provides support for launching an encrypted VMs on
AMD x86 platform using Secure Encrypted Virtualization (SEV) feature.
This patch adds support to query the SEV capability from the qemu.
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
---
src/conf/domain_capabilities.c | 12 ++++
src/conf/domain_capabilities.h | 16 +++++
src/libvirt_private.syms | 2 +-
src/qemu/qemu_capabilities.c | 35 ++++++++++
src/qemu/qemu_capabilities.h | 2 +-
src/qemu/qemu_capspriv.h | 4 ++
src/qemu/qemu_monitor.c | 10 +++
src/qemu/qemu_monitor.h | 3 +
src/qemu/qemu_monitor_json.c | 79 ++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 3 +
.../caps_2.12.0.x86_64.replies | 10 +++
tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml | 3 +-
12 files changed, 176 insertions(+), 3 deletions(-)
diff --git a/src/conf/domain_capabilities.c b/src/conf/domain_capabilities.c
index c20358e..3589777 100644
--- a/src/conf/domain_capabilities.c
+++ b/src/conf/domain_capabilities.c
@@ -67,6 +67,18 @@ virDomainCapsStringValuesFree(virDomainCapsStringValuesPtr values)
}
+void
+virSEVCapabilitiesFree(virSEVCapability *cap)
+{
+ if (!cap)
+ return;
+
+ VIR_FREE(cap->pdh);
+ VIR_FREE(cap->cert_chain);
+ VIR_FREE(cap);
+}
+
+
static void
virDomainCapsDispose(void *obj)
{
diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h
index b0eb4aa..30b3272 100644
--- a/src/conf/domain_capabilities.h
+++ b/src/conf/domain_capabilities.h
@@ -137,6 +137,22 @@ struct _virDomainCapsCPU {
virDomainCapsCPUModelsPtr custom;
};
+/*
+ * SEV capabilities
+ */
+typedef struct _virSEVCapability virSEVCapability;
+typedef virSEVCapability *virSEVCapabilityPtr;
+struct _virSEVCapability {
+ char *pdh;
+ char *cert_chain;
+ unsigned int cbitpos;
+ unsigned int reduced_phys_bits;
+};
+
+void
+virSEVCapabilitiesFree(virSEVCapability *capabilities);
+
+
struct _virDomainCaps {
virObjectLockable parent;
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 5540391..59a2efd 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -185,7 +185,7 @@ virDomainCapsEnumClear;
virDomainCapsEnumSet;
virDomainCapsFormat;
virDomainCapsNew;
-
+virSEVCapabilitiesFree;
# conf/domain_conf.h
virBlkioDeviceArrayClear;
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index b20149b..70cf1e5 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -494,6 +494,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
/* 305 */
"vhost-vsock",
"chardev-fd-pass",
+ "sev-guest",
);
@@ -560,6 +561,8 @@ struct _virQEMUCaps {
size_t ngicCapabilities;
virGICCapability *gicCapabilities;
+ virSEVCapability *sevCapabilities;
+
virQEMUCapsHostCPUData kvmCPU;
virQEMUCapsHostCPUData tcgCPU;
};
@@ -1131,6 +1134,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
{ "hda-output", QEMU_CAPS_HDA_OUTPUT },
{ "vmgenid", QEMU_CAPS_DEVICE_VMGENID },
{ "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
+ { "sev-guest", QEMU_CAPS_SEV_GUEST },
};
static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
@@ -2067,6 +2071,16 @@ virQEMUCapsSetGICCapabilities(virQEMUCapsPtr qemuCaps,
}
+void
+virQEMUCapsSetSEVCapabilities(virQEMUCapsPtr qemuCaps,
+ virSEVCapability *capabilities)
+{
+ virSEVCapabilitiesFree(qemuCaps->sevCapabilities);
+
+ qemuCaps->sevCapabilities = capabilities;
+}
+
+
static int
virQEMUCapsProbeQMPCommands(virQEMUCapsPtr qemuCaps,
qemuMonitorPtr mon)
@@ -2650,6 +2664,21 @@ virQEMUCapsProbeQMPGICCapabilities(virQEMUCapsPtr qemuCaps,
}
+static int
+virQEMUCapsProbeQMPSEVCapabilities(virQEMUCapsPtr qemuCaps,
+ qemuMonitorPtr mon)
+{
+ virSEVCapability *caps = NULL;
+
+ if (qemuMonitorGetSEVCapabilities(mon, &caps) < 0)
+ return -1;
+
+ virQEMUCapsSetSEVCapabilities(qemuCaps, caps);
+
+ return 0;
+}
+
+
bool
virQEMUCapsCPUFilterFeatures(const char *name,
void *opaque)
@@ -4049,6 +4078,12 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_VFIO_CCW);
}
+ /* Probe for SEV capabilities */
+ if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_SEV_GUEST)) {
+ if (virQEMUCapsProbeQMPSEVCapabilities(qemuCaps, mon) < 0)
+ virQEMUCapsClear(qemuCaps, QEMU_CAPS_SEV_GUEST);
+ }
+
ret = 0;
cleanup:
return ret;
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index f60dfb1..7390271 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -478,6 +478,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
/* 305 */
QEMU_CAPS_DEVICE_VHOST_VSOCK, /* -device vhost-vsock-* */
QEMU_CAPS_CHARDEV_FD_PASS, /* Passing pre-opened FDs for chardevs */
+ QEMU_CAPS_SEV_GUEST, /* -object sev-guest,... */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
@@ -615,5 +616,4 @@ bool virQEMUCapsGuestIsNative(virArch host,
bool virQEMUCapsCPUFilterFeatures(const char *name,
void *opaque);
-
#endif /* __QEMU_CAPABILITIES_H__*/
diff --git a/src/qemu/qemu_capspriv.h b/src/qemu/qemu_capspriv.h
index 989d183..29d7639 100644
--- a/src/qemu/qemu_capspriv.h
+++ b/src/qemu/qemu_capspriv.h
@@ -90,6 +90,10 @@ virQEMUCapsSetGICCapabilities(virQEMUCapsPtr qemuCaps,
virGICCapability *capabilities,
size_t ncapabilities);
+void
+virQEMUCapsSetSEVCapabilities(virQEMUCapsPtr qemuCaps,
+ virSEVCapability *capabilities);
+
int
virQEMUCapsProbeQMPCPUDefinitions(virQEMUCapsPtr qemuCaps,
qemuMonitorPtr mon,
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 215135a..fd6bce9 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3850,6 +3850,16 @@ qemuMonitorGetGICCapabilities(qemuMonitorPtr mon,
int
+qemuMonitorGetSEVCapabilities(qemuMonitorPtr mon,
+ virSEVCapability **capabilities)
+{
+ QEMU_CHECK_MONITOR(mon);
+
+ return qemuMonitorJSONGetSEVCapabilities(mon, capabilities);
+}
+
+
+int
qemuMonitorNBDServerStart(qemuMonitorPtr mon,
const char *host,
unsigned int port,
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 4384372..75d5d98 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -711,6 +711,9 @@ int qemuMonitorSetMigrationCapabilities(qemuMonitorPtr mon,
int qemuMonitorGetGICCapabilities(qemuMonitorPtr mon,
virGICCapability **capabilities);
+int qemuMonitorGetSEVCapabilities(qemuMonitorPtr mon,
+ virSEVCapability **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 e8a46d2..ba0da9a 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -6401,6 +6401,85 @@ qemuMonitorJSONGetGICCapabilities(qemuMonitorPtr mon,
return ret;
}
+
+int
+qemuMonitorJSONGetSEVCapabilities(qemuMonitorPtr mon,
+ virSEVCapability **capabilities)
+{
+ int ret = -1;
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ virJSONValuePtr caps;
+ virSEVCapability *capability = NULL;
+ const char *pdh = NULL, *cert_chain = NULL;
+ unsigned int cbitpos, reduced_phys_bits;
+
+ *capabilities = NULL;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("query-sev-capabilities",
+ NULL)))
+ return -1;
+
+ if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+ goto cleanup;
+
+
+ if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+ goto cleanup;
+
+ caps = virJSONValueObjectGetObject(reply, "return");
+
+ if (virJSONValueObjectGetNumberUint(caps, "cbitpos", &cbitpos) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-sev-capabilities reply was missing"
+ " 'cbitpos' field"));
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUint(caps, "reduced-phys-bits",
+ &reduced_phys_bits) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-sev-capabilities reply was missing"
+ " 'reduced-phys-bits' field"));
+ goto cleanup;
+ }
+
+ if (!(pdh = virJSONValueObjectGetString(caps, "pdh"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-sev-capabilities reply was missing"
+ " 'pdh' field"));
+ goto cleanup;
+ }
+
+ if (!(cert_chain = virJSONValueObjectGetString(caps, "cert-chain"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-sev-capabilities reply was missing"
+ " 'cert-chain' field"));
+ goto cleanup;
+ }
+
+ if (VIR_ALLOC(capability) < 0)
+ goto cleanup;
+
+ if (VIR_STRDUP(capability->pdh, pdh) < 0)
+ goto cleanup;
+
+ if (VIR_STRDUP(capability->cert_chain, cert_chain) < 0)
+ goto cleanup;
+
+ capability->cbitpos = cbitpos;
+ capability->reduced_phys_bits = reduced_phys_bits;
+ VIR_STEAL_PTR(*capabilities, capability);
+ ret = 0;
+
+ cleanup:
+ virSEVCapabilitiesFree(capability);
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+
+ return ret;
+}
+
static virJSONValuePtr
qemuMonitorJSONBuildInetSocketAddress(const char *host,
const char *port)
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 2ae0faa..4c10574 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -152,6 +152,9 @@ int qemuMonitorJSONSetMigrationCapabilities(qemuMonitorPtr mon,
int qemuMonitorJSONGetGICCapabilities(qemuMonitorPtr mon,
virGICCapability **capabilities);
+int qemuMonitorJSONGetSEVCapabilities(qemuMonitorPtr mon,
+ virSEVCapability **capabilities);
+
int qemuMonitorJSONMigrate(qemuMonitorPtr mon,
unsigned int flags,
const char *uri);
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
index c40046b..ace3537 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
@@ -18996,6 +18996,16 @@
}
{
+ "return" : {
+ "reduced-phys-bits": 1,
+ "cbitpos": 47,
+ "cert-chain": "AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA",
+ "pdh": "AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA"
+ },
+ "id": "libvirt-52"
+}
+
+{
"return": {
},
"id": "libvirt-1"
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index 038c92c..eb757cc 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -207,9 +207,10 @@
<flag name='vmgenid'/>
<flag name='vhost-vsock'/>
<flag name='chardev-fd-pass'/>
+ <flag name='sev-guest'/>
<version>2011090</version>
<kvmVersion>0</kvmVersion>
- <microcodeVersion>390813</microcodeVersion>
+ <microcodeVersion>391059</microcodeVersion>
<package>v2.12.0-rc0</package>
<arch>x86_64</arch>
<hostCPU type='kvm' model='base' migratability='yes'>
--
2.7.4
--
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