[libvirt] [PATCH v6 1/9] qemu: provide support to query the SEV capability
Brijesh Singh
brijesh.singh at amd.com
Wed May 23 21:18:26 UTC 2018
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 at amd.com>
---
src/conf/domain_capabilities.h | 13 ++++
src/qemu/qemu_capabilities.c | 47 ++++++++++++++
src/qemu/qemu_capabilities.h | 4 ++
src/qemu/qemu_capspriv.h | 4 ++
src/qemu/qemu_monitor.c | 9 +++
src/qemu/qemu_monitor.h | 3 +
src/qemu/qemu_monitor_json.c | 74 ++++++++++++++++++++++
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, 169 insertions(+), 1 deletion(-)
diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h
index 9b852e8649bf..c1093234ceb8 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 8a63db5f4f33..49b74f7e12c1 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -489,6 +489,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
"screendump_device",
"hda-output",
"blockdev-del",
+ "sev-guest",
);
@@ -555,6 +556,8 @@ struct _virQEMUCaps {
size_t ngicCapabilities;
virGICCapability *gicCapabilities;
+ virSEVCapability *sevCapabilities;
+
virQEMUCapsHostCPUData kvmCPU;
virQEMUCapsHostCPUData tcgCPU;
};
@@ -1121,6 +1124,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
{ "virtual-css-bridge", QEMU_CAPS_CCW },
{ "vfio-ccw", QEMU_CAPS_DEVICE_VFIO_CCW },
{ "hda-output", QEMU_CAPS_HDA_OUTPUT },
+ { "sev-guest", QEMU_CAPS_SEV_GUEST },
};
static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
@@ -2050,6 +2054,28 @@ virQEMUCapsSetGICCapabilities(virQEMUCapsPtr qemuCaps,
}
+void
+virQEMUSevCapabilitiesFree(virSEVCapability *cap)
+{
+ if (!cap)
+ return;
+
+ VIR_FREE(cap->pdh);
+ VIR_FREE(cap->cert_chain);
+ VIR_FREE(cap);
+}
+
+
+void
+virQEMUCapsSetSEVCapabilities(virQEMUCapsPtr qemuCaps,
+ virSEVCapability *capabilities)
+{
+ virQEMUSevCapabilitiesFree(qemuCaps->sevCapabilities);
+
+ qemuCaps->sevCapabilities = capabilities;
+}
+
+
static int
virQEMUCapsProbeQMPCommands(virQEMUCapsPtr qemuCaps,
qemuMonitorPtr mon)
@@ -2580,6 +2606,21 @@ 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)
@@ -3965,6 +4006,12 @@ 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 3e120e64c0b4..8b7eef4359b7 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -473,6 +473,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
QEMU_CAPS_SCREENDUMP_DEVICE, /* screendump command accepts device & head */
QEMU_CAPS_HDA_OUTPUT, /* -device hda-output */
QEMU_CAPS_BLOCKDEV_DEL, /* blockdev-del is supported */
+ QEMU_CAPS_SEV_GUEST, /* -object sev-guest,... */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
@@ -599,4 +600,7 @@ bool virQEMUCapsGuestIsNative(virArch host,
bool virQEMUCapsCPUFilterFeatures(const char *name,
void *opaque);
+void
+virQEMUSevCapabilitiesFree(virSEVCapability *capabilities);
+
#endif /* __QEMU_CAPABILITIES_H__*/
diff --git a/src/qemu/qemu_capspriv.h b/src/qemu/qemu_capspriv.h
index 0199501c931b..20b03876d470 100644
--- a/src/qemu/qemu_capspriv.h
+++ b/src/qemu/qemu_capspriv.h
@@ -85,6 +85,10 @@ 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 43f1d2f81671..3b034930408c 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3778,6 +3778,15 @@ qemuMonitorGetGICCapabilities(qemuMonitorPtr mon,
return qemuMonitorJSONGetGICCapabilities(mon, capabilities);
}
+int
+qemuMonitorGetSEVCapabilities(qemuMonitorPtr mon,
+ virSEVCapability **capabilities)
+{
+ QEMU_CHECK_MONITOR(mon);
+
+ return qemuMonitorJSONGetSEVCapabilities(mon, capabilities);
+}
+
int
qemuMonitorNBDServerStart(qemuMonitorPtr mon,
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index c28db1a52b8b..b1b7ef09c929 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -710,6 +710,9 @@ 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 9f5c35879587..24d3a2ff412f 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -6436,6 +6436,80 @@ 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;
+ VIR_STEAL_PTR(*capabilities, capability);
+ ret = 0;
+
+ cleanup:
+ virQEMUSevCapabilitiesFree(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 f4ac8319ac8a..129aab22bf98 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 c40046beef6b..ace35374ef96 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.replies
@@ -18995,6 +18995,16 @@
"id": "libvirt-51"
}
+{
+ "return" : {
+ "reduced-phys-bits": 1,
+ "cbitpos": 47,
+ "cert-chain": "AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA",
+ "pdh": "AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA"
+ },
+ "id": "libvirt-52"
+}
+
{
"return": {
},
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index 3c7dadffcd8a..58a1bf835a73 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -204,9 +204,10 @@
<flag name='screendump_device'/>
<flag name='hda-output'/>
<flag name='blockdev-del'/>
+ <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'>
--
2.14.3
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