[libvirt] [PATCH V2 3/4] qemu: Add domain support for VCPU halted state
Adding a field to the domain's private vcpu object to hold the halted
state information.
Adding two functions in support of the halted state:
- qemuDomainGetVcpuHalted: retrieve the halted state from a
private vcpu object
- qemuDomainRefreshVcpuHalted: obtain the per-vcpu halted states
via qemu monitor and store the results in the private vcpu objects
Signed-off-by: Viktor Mihajlovski <mihajlov(a)linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk(a)linux.vnet.ibm.com>
Reviewed-by: Hao QingFeng <haoqf(a)linux.vnet.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy(a)linux.vnet.ibm.com>
---
src/qemu/qemu_domain.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_domain.h | 5 ++++
2 files changed, 74 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 3f16dbe..3fb9b4f 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -5956,6 +5956,75 @@ qemuDomainRefreshVcpuInfo(virQEMUDriverPtr driver,
return ret;
}
+/**
+ * qemuDomainGetVcpuHalted:
+ * @vm: domain object
+ * @vcpu: cpu id
+ *
+ * Returns the vCPU halted state.
+ */
+bool
+qemuDomainGetVcpuHalted(virDomainObjPtr vm,
+ unsigned int vcpuid)
+{
+ virDomainVcpuDefPtr vcpu = virDomainDefGetVcpu(vm->def, vcpuid);
+ return QEMU_DOMAIN_VCPU_PRIVATE(vcpu)->halted;
+}
+
+/**
+ * qemuDomainRefreshVcpuHalted:
+ * @driver: qemu driver data
+ * @vm: domain object
+ * @asyncJob: current asynchronous job type
+ *
+ * Updates vCPU halted state in the private data of @vm.
+ *
+ * Returns number of detected vCPUs on success, -1 on error and reports
+ * an appropriate error, -2 if the domain doesn't exist any more.
+ */
+int
+qemuDomainRefreshVcpuHalted(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ int asyncJob)
+{
+ virDomainVcpuDefPtr vcpu;
+ qemuMonitorCPUInfoPtr info = NULL;
+ size_t maxvcpus = virDomainDefGetVcpusMax(vm->def);
+ size_t i;
+ bool hotplug;
+ int rc;
+ int ret = -1;
+
+ /* Not supported currently for TCG, see qemuDomainRefreshVcpuInfo */
+ if (vm->def->virtType == VIR_DOMAIN_VIRT_QEMU)
+ return 0;
+
+ hotplug = qemuDomainSupportsNewVcpuHotplug(vm);
+
+ if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
+ return -1;
+
+ rc = qemuMonitorGetCPUInfo(qemuDomainGetMonitor(vm), &info, maxvcpus, hotplug);
+
+ if (qemuDomainObjExitMonitor(driver, vm) < 0) {
+ ret = -2;
+ goto cleanup;
+ }
+
+ if (rc < 0)
+ goto cleanup;
+
+ for (i = 0; i < maxvcpus; i++) {
+ vcpu = virDomainDefGetVcpu(vm->def, i);
+ QEMU_DOMAIN_VCPU_PRIVATE(vcpu)->halted = info[i].halted;
+ }
+
+ ret = 0;
+
+ cleanup:
+ qemuMonitorCPUInfoFree(info, maxvcpus);
+ return ret;
+}
bool
qemuDomainSupportsNicdev(virDomainDefPtr def,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index a1404d0..03e58c5 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -317,6 +317,7 @@ struct _qemuDomainVcpuPrivate {
pid_t tid; /* vcpu thread id */
int enable_id; /* order in which the vcpus were enabled in qemu */
char *alias;
+ bool halted; /* vcpu halted state */
/* information for hotpluggable cpus */
char *type;
@@ -662,6 +663,10 @@ int qemuDomainRefreshVcpuInfo(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int asyncJob,
bool state);
+bool qemuDomainGetVcpuHalted(virDomainObjPtr vm, unsigned int vcpu);
+int qemuDomainRefreshVcpuHalted(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ int asyncJob);
bool qemuDomainSupportsNicdev(virDomainDefPtr def,
virDomainNetDefPtr net);
--
1.9.1