9:18 a.m.
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.
Reviewed-by: "Daniel P. Berrangé" <berrange(a)redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh(a)amd.com>
---
src/conf/domain_capabilities.h | 13 ++++
src/qemu/qemu_capabilities.c | 38 +++++++++++
src/qemu/qemu_capabilities.h | 1 +
src/qemu/qemu_capspriv.h | 4 ++
src/qemu/qemu_monitor.c | 9 +++
src/qemu/qemu_monitor.h | 3 +
src/qemu/qemu_monitor_json.c | 73 ++++++++++++++++++++++
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 +-
10 files changed, 156 insertions(+), 1 deletion(-)
diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h
index fa4c1e4..72e9daf 100644
--- a/src/conf/domain_capabilities.h
+++ b/src/conf/domain_capabilities.h
@@ -137,6 +137,19 @@ 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;
+};
+
+
struct _virDomainCaps {
virObjectLockable parent;
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index e54dde6..0f6e6fb 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -466,6 +466,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
/* 285 */
"virtio-mouse-ccw",
"virtio-tablet-ccw",
+ "sev-guest",
);
@@ -532,6 +533,8 @@ struct _virQEMUCaps {
size_t ngicCapabilities;
virGICCapability *gicCapabilities;
+ virSEVCapability *sevCapabilities;
+
virQEMUCapsHostCPUData kvmCPU;
virQEMUCapsHostCPUData tcgCPU;
};
@@ -1705,6 +1708,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
{ "virtio-keyboard-ccw", QEMU_CAPS_DEVICE_VIRTIO_KEYBOARD_CCW },
{ "virtio-mouse-ccw", QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW },
{ "virtio-tablet-ccw", QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW },
+ { "sev-guest", QEMU_CAPS_SEV_GUEST },
};
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBalloon[] = {
@@ -2784,6 +2788,21 @@ virQEMUCapsSetGICCapabilities(virQEMUCapsPtr qemuCaps,
qemuCaps->ngicCapabilities = ncapabilities;
}
+void
+virQEMUCapsSetSEVCapabilities(virQEMUCapsPtr qemuCaps,
+ virSEVCapability *capabilities)
+{
+ virSEVCapability *cap = qemuCaps->sevCapabilities;
+
+ if (cap) {
+ VIR_FREE(cap->pdh);
+ VIR_FREE(cap->cert_chain);
+ }
+
+ VIR_FREE(qemuCaps->sevCapabilities);
+
+ qemuCaps->sevCapabilities = capabilities;
+}
static int
virQEMUCapsProbeQMPCommands(virQEMUCapsPtr qemuCaps,
@@ -3287,6 +3306,19 @@ virQEMUCapsProbeQMPGICCapabilities(virQEMUCapsPtr qemuCaps,
return 0;
}
+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,
@@ -4768,6 +4800,12 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_CACHE);
+ /* 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 3f3c29f..9b51cc2 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -450,6 +450,7 @@ typedef enum {
/* 285 */
QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW, /* -device virtio-mouse-ccw */
QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW, /* -device virtio-tablet-ccw */
+ QEMU_CAPS_SEV_GUEST, /* -object sev-guest,... */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
diff --git a/src/qemu/qemu_capspriv.h b/src/qemu/qemu_capspriv.h
index 222f336..1fa85cc 100644
--- a/src/qemu/qemu_capspriv.h
+++ b/src/qemu/qemu_capspriv.h
@@ -86,6 +86,10 @@ virQEMUCapsSetGICCapabilities(virQEMUCapsPtr qemuCaps,
virGICCapability *capabilities,
size_t ncapabilities);
+void
+virQEMUCapsSetSEVCapabilities(virQEMUCapsPtr qemuCaps,
+ virSEVCapability *capabilities);
+
int
virQEMUCapsParseHelpStr(const char *qemu,
const char *str,
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index e169553..44c2dff 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4007,6 +4007,15 @@ qemuMonitorGetGICCapabilities(qemuMonitorPtr mon,
return qemuMonitorJSONGetGICCapabilities(mon, capabilities);
}
+int
+qemuMonitorGetSEVCapabilities(qemuMonitorPtr mon,
+ virSEVCapability **capabilities)
+{
+ QEMU_CHECK_MONITOR_JSON(mon);
+
+ return qemuMonitorJSONGetSEVCapabilities(mon, capabilities);
+}
+
int
qemuMonitorNBDServerStart(qemuMonitorPtr mon,
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 7a22323..efd3427 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -767,6 +767,9 @@ int qemuMonitorSetMigrationCapability(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 d80c4f1..e67f7b7 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -6398,6 +6398,79 @@ 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;
+ 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 (virJSONValueObjectGetNumberInt(caps, "cbitpos", &cbitpos) < 0)
{
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("'cbitpos' field is missing"));
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberInt(caps, "reduced-phys-bits",
+ &reduced_phys_bits) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("'reduced-phys-bits' field is missing"));
+ goto cleanup;
+ }
+
+ if (!(pdh = virJSONValueObjectGetString(caps, "pdh"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("'pdh' field is missing"));
+ goto cleanup;
+ }
+
+ if (!(cert_chain = virJSONValueObjectGetString(caps, "cert-chain"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("'cert-chain' field is missing"));
+ 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;
+ *capabilities = capability;
+ ret = 0;
+
+ cleanup:
+ 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 846d366..f30ff1f 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -152,6 +152,9 @@ int qemuMonitorJSONSetMigrationCapability(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 c086e04..8287bb7 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
@@ -18942,6 +18942,16 @@
}
{
+ "return" : {
+ "reduced-phys-bits": 1,
+ "cbitpos": 47,
+ "cert-chain":
"AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA",
+ "pdh":
"AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA"
+ },
+ "id": "libvirt-51"
+}
+
+{
"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 334296e..43eeef5 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -225,9 +225,10 @@
<flag name='iscsi.password-secret'/>
<flag name='isa-serial'/>
<flag name='dump-completed'/>
+ <flag name='sev-guest'/>
<version>2011090</version>
<kvmVersion>0</kvmVersion>
- <microcodeVersion>390060</microcodeVersion>
+ <microcodeVersion>390306</microcodeVersion>
<package>v2.12.0-rc0</package>
<arch>x86_64</arch>
<hostCPU type='kvm' model='base' migratability='yes'>
--
2.7.4