1:50 a.m.
This patch implements the internal driver API for launch event into
qemu driver. When SEV is enabled, execute 'query-sev-launch-measurement'
to get the measurement of memory encrypted through launch sequence.
Signed-off-by: Brijesh Singh <brijesh.singh(a)amd.com>
---
src/qemu/qemu_driver.c | 69 ++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor.c | 8 +++++
src/qemu/qemu_monitor.h | 3 ++
src/qemu/qemu_monitor_json.c | 42 +++++++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 2 ++
5 files changed, 124 insertions(+)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index c289b21..c0785c9 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -21527,6 +21527,74 @@ qemuNodeGetSEVInfo(virConnectPtr conn,
}
+static int
+qemuDomainGetSEVMeasurement(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ virTypedParameterPtr *params,
+ int *nparams,
+ unsigned int flags)
+{
+ int ret = -1;
+ char *tmp;
+ int maxpar = 0;
+
+ virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
+
+ if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
+ return -1;
+
+ if (qemuDomainObjEnterMonitorAsync(driver, vm, QEMU_ASYNC_JOB_NONE) < 0)
+ goto endjob;
+
+ tmp = qemuMonitorGetSEVMeasurement(QEMU_DOMAIN_PRIVATE(vm)->mon);
+ if (tmp == NULL)
+ goto endjob;
+
+ if (qemuDomainObjExitMonitor(driver, vm) < 0)
+ goto endjob;
+
+ if (virTypedParamsAddString(params, nparams, &maxpar,
+ VIR_DOMAIN_LAUNCH_SECURITY_SEV_MEASUREMENT,
+ tmp) < 0)
+ goto endjob;
+
+ VIR_FREE(tmp);
+ ret = 0;
+
+ endjob:
+ qemuDomainObjEndJob(driver, vm);
+ return ret;
+}
+
+
+static int
+qemuDomainGetLaunchSecurityInfo(virDomainPtr domain,
+ virTypedParameterPtr *params,
+ int *nparams,
+ unsigned int flags)
+{
+ virQEMUDriverPtr driver = domain->conn->privateData;
+ virDomainObjPtr vm;
+ int ret = -1;
+
+ if (!(vm = qemuDomObjFromDomain(domain)))
+ goto cleanup;
+
+ if (virDomainGetLaunchSecurityInfoEnsureACL(domain->conn, vm->def) < 0)
+ goto cleanup;
+
+ if (vm->def->sev) {
+ if (qemuDomainGetSEVMeasurement(driver, vm, params, nparams, flags) < 0)
+ goto cleanup;
+ }
+
+ ret = 0;
+
+ cleanup:
+ virDomainObjEndAPI(&vm);
+ return ret;
+}
+
static virHypervisorDriver qemuHypervisorDriver = {
.name = QEMU_DRIVER_NAME,
.connectURIProbe = qemuConnectURIProbe,
@@ -21751,6 +21819,7 @@ static virHypervisorDriver qemuHypervisorDriver = {
.connectCompareHypervisorCPU = qemuConnectCompareHypervisorCPU, /* 4.4.0 */
.connectBaselineHypervisorCPU = qemuConnectBaselineHypervisorCPU, /* 4.4.0 */
.nodeGetSEVInfo = qemuNodeGetSEVInfo, /* 4.5.0 */
+ .domainGetLaunchSecurityInfo = qemuDomainGetLaunchSecurityInfo, /* 4.5.0 */
};
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index fd6bce9..6e0cdca 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4297,3 +4297,11 @@ qemuMonitorBlockdevDel(qemuMonitorPtr mon,
return qemuMonitorJSONBlockdevDel(mon, nodename);
}
+
+char *
+qemuMonitorGetSEVMeasurement(qemuMonitorPtr mon)
+{
+ QEMU_CHECK_MONITOR_NULL(mon);
+
+ return qemuMonitorJSONGetSEVMeasurement(mon);
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 75d5d98..7432997 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1142,4 +1142,7 @@ int qemuMonitorBlockdevAdd(qemuMonitorPtr mon,
int qemuMonitorBlockdevDel(qemuMonitorPtr mon,
const char *nodename);
+char *
+qemuMonitorGetSEVMeasurement(qemuMonitorPtr mon);
+
#endif /* QEMU_MONITOR_H */
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index ba0da9a..c5480a2 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -7994,3 +7994,45 @@ qemuMonitorJSONBlockdevDel(qemuMonitorPtr mon,
virJSONValueFree(reply);
return ret;
}
+
+/**
+ * The function is used to retrieve the measurement of a SEV guest.
+ * The measurement is signature of the memory contents that was encrypted
+ * through the SEV launch flow.
+ *
+ * A example JSON output:
+ *
+ * { "execute" : "query-sev-launch-measure" }
+ * { "return" : { "data" : "4l8LXeNlSPUDlXPJG5966/8%YZ" }
}
+ */
+char *
+qemuMonitorJSONGetSEVMeasurement(qemuMonitorPtr mon)
+{
+ const char *tmp;
+ char *measurement = NULL;
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ virJSONValuePtr data;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("query-sev-launch-measure", NULL)))
+ return NULL;
+
+ if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+ goto cleanup;
+
+ if (qemuMonitorJSONCheckReply(cmd, reply, VIR_JSON_TYPE_OBJECT) < 0)
+ goto cleanup;
+
+ data = virJSONValueObjectGetObject(reply, "return");
+
+ if (!(tmp = virJSONValueObjectGetString(data, "data")))
+ goto cleanup;
+
+ if (VIR_STRDUP(measurement, tmp) < 0)
+ goto cleanup;
+
+ cleanup:
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+ return measurement;
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 4c10574..6bc0dd3 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -343,6 +343,8 @@ int qemuMonitorJSONGetBlockIoThrottle(qemuMonitorPtr mon,
int qemuMonitorJSONSystemWakeup(qemuMonitorPtr mon);
+char *qemuMonitorJSONGetSEVMeasurement(qemuMonitorPtr mon);
+
int qemuMonitorJSONGetVersion(qemuMonitorPtr mon,
int *major,
int *minor,
--
2.7.4