[libvirt] [PATCH v3 7/9] qemu_driver: add support to launch security info

[Brijesh Singh]

This patch implement 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 at amd.com>
---
 src/qemu/qemu_driver.c       | 66 ++++++++++++++++++++++++++++++++++++++++++++
 src/qemu/qemu_monitor.c      |  8 ++++++
 src/qemu/qemu_monitor.h      |  3 ++
 src/qemu/qemu_monitor_json.c | 32 +++++++++++++++++++++
 src/qemu/qemu_monitor_json.h |  2 ++
 5 files changed, 111 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 8c872c1f08d3..2f38f0366dde 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -21254,6 +21254,71 @@ qemuDomainSetLifecycleAction(virDomainPtr dom,
     return ret;
 }
 
+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;
+
+    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,
@@ -21474,6 +21539,7 @@ static virHypervisorDriver qemuHypervisorDriver = {
     .domainSetVcpu = qemuDomainSetVcpu, /* 3.1.0 */
     .domainSetBlockThreshold = qemuDomainSetBlockThreshold, /* 3.2.0 */
     .domainSetLifecycleAction = qemuDomainSetLifecycleAction, /* 3.9.0 */
+    .domainGetLaunchSecurityInfo = qemuDomainGetLaunchSecurityInfo, /* 4.2.0 */
 };
 
 
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 2820714b5c55..b0a4e0ea75ad 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4417,3 +4417,11 @@ qemuMonitorSetWatchdogAction(qemuMonitorPtr mon,
 
     return qemuMonitorJSONSetWatchdogAction(mon, action);
 }
+
+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 aaa14f66fdfb..6a4f28796767 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1188,4 +1188,7 @@ virJSONValuePtr qemuMonitorQueryNamedBlockNodes(qemuMonitorPtr mon);
 
 int qemuMonitorSetWatchdogAction(qemuMonitorPtr mon,
                                  const char *action);
+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 c51b98d2bda7..805c2f3b81e3 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -7991,3 +7991,35 @@ qemuMonitorJSONSetWatchdogAction(qemuMonitorPtr mon,
     virJSONValueFree(reply);
     return ret;
 }
+
+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 (qemuMonitorJSONCheckError(cmd, reply) < 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 305f789902e9..b83160a20e00 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -342,6 +342,8 @@ int qemuMonitorJSONGetBlockIoThrottle(qemuMonitorPtr mon,
 
 int qemuMonitorJSONSystemWakeup(qemuMonitorPtr mon);
 
+char *qemuMonitorJSONGetSevMeasurement(qemuMonitorPtr mon);
+
 int qemuMonitorJSONGetVersion(qemuMonitorPtr mon,
                               int *major,
                               int *minor,
-- 
2.14.3