[PATCH v2 3/3] qemu: Introduce qemuDomainGetStatsCpuHaltPollTime

[Yang Fei <yangfei85@xxxxxxxxxx>]

This function is used to obtain the halt polling time. The kernel
provides statistics about haltpollsuccess.time and
haltpollfail.time. We add it in domstats, so that we can use
command 'virsh domstats VM' to get it if system support.

Signed-off-by: Yang Fei <yangfei85@xxxxxxxxxx>
---
 src/qemu/qemu_driver.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 235f575901..6163037ec3 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17839,6 +17839,31 @@ qemuDomainGetStatsCpuCgroup(virDomainObj *dom,
     return 0;
 }
 
+#ifdef __linux__
+static int
+qemuDomainGetStatsCpuHaltPollTime(virDomainObj *dom,
+                                 virTypedParamList *params)
+{
+    unsigned long long haltPollSuccess = 0;
+    unsigned long long haltPollFail = 0;
+    pid_t pid = dom->pid;
+    int err = 0;
+
+    err = virGetCpuHaltPollTime(pid, &haltPollSuccess, &haltPollFail);
+    if (!err && virTypedParamListAddULLong(params, haltPollSuccess, "haltpollsuccess.time") < 0)
+        return -1;
+    if (!err && virTypedParamListAddULLong(params, haltPollFail, "haltpollfail.time") < 0)
+        return -1;
+    return 0;
+}
+#else
+static int
+qemuDomainGetStatsCpuHaltPollTime(virDomainObj *dom,
+                                 virTypedParamList *params)
+{
+    return 0;
+}
+#endif
 
 static int
 qemuDomainGetStatsCpu(virQEMUDriver *driver,
@@ -17852,6 +17877,9 @@ qemuDomainGetStatsCpu(virQEMUDriver *driver,
     if (qemuDomainGetStatsCpuCache(driver, dom, params) < 0)
         return -1;
 
+    if (qemuDomainGetStatsCpuHaltPollTime(dom, params) < 0)
+        return -1;
+
     return 0;
 }
 
-- 
2.23.0