[libvirt] [RFC PATCH 14/17] qemu: start/stop the vhost-user-gpu external device

[marcandre.lureau at redhat.com]

From: Marc-André Lureau <marcandre.lureau at redhat.com>

Each vhost-user-gpu needs its own helper gpu process.
Start/stop them, and apply the emulator cgroup controller.

Signed-off-by: Marc-André Lureau <marcandre.lureau at redhat.com>
---
 src/qemu/qemu_extdevice.c | 47 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 42 insertions(+), 5 deletions(-)

diff --git a/src/qemu/qemu_extdevice.c b/src/qemu/qemu_extdevice.c
index d982922470..8ec703a9b0 100644
--- a/src/qemu/qemu_extdevice.c
+++ b/src/qemu/qemu_extdevice.c
@@ -25,6 +25,7 @@
 #include "qemu_extdevice.h"
 #include "qemu_domain.h"
 #include "qemu_tpm.h"
+#include "qemu_vhost_user_gpu.h"
 
 #include "viralloc.h"
 #include "virlog.h"
@@ -132,11 +133,21 @@ qemuExtDevicesStart(virQEMUDriverPtr driver,
                     virDomainDefPtr def,
                     qemuDomainLogContextPtr logCtxt)
 {
-    int ret = 0;
+    int i, ret = 0;
 
     if (qemuExtDevicesInitPaths(driver, def) < 0)
         return -1;
 
+    for (i = 0; i < def->nvideos; i++) {
+        virDomainVideoDefPtr video = def->videos[i];
+
+        if (video->type == VIR_DOMAIN_VIDEO_TYPE_VHOST_USER) {
+            ret = qemuExtVhostUserGPUStart(driver, def, video, logCtxt);
+            if (ret < 0)
+                return ret;
+        }
+    }
+
     if (def->tpm)
         ret = qemuExtTPMStart(driver, def, logCtxt);
 
@@ -148,9 +159,19 @@ void
 qemuExtDevicesStop(virQEMUDriverPtr driver,
                    virDomainDefPtr def)
 {
+    int i;
+
     if (qemuExtDevicesInitPaths(driver, def) < 0)
         return;
 
+    for (i = 0; i < def->nvideos; i++) {
+        virDomainVideoDefPtr video = def->videos[i];
+
+        if (video->type == VIR_DOMAIN_VIDEO_TYPE_VHOST_USER) {
+            qemuExtVhostUserGPUStop(driver, def, video);
+        }
+    }
+
     if (def->tpm)
         qemuExtTPMStop(driver, def);
 }
@@ -159,6 +180,13 @@ qemuExtDevicesStop(virQEMUDriverPtr driver,
 bool
 qemuExtDevicesHasDevice(virDomainDefPtr def)
 {
+    int i;
+
+    for (i = 0; i < def->nvideos; i++) {
+        if (def->videos[i]->type == VIR_DOMAIN_VIDEO_TYPE_VHOST_USER)
+            return true;
+    }
+
     if (def->tpm && def->tpm->type == VIR_DOMAIN_TPM_TYPE_EMULATOR)
         return true;
 
@@ -171,10 +199,19 @@ qemuExtDevicesSetupCgroup(virQEMUDriverPtr driver,
                           virDomainDefPtr def,
                           virCgroupPtr cgroup)
 {
-    int ret = 0;
+    int i;
 
-    if (def->tpm)
-        ret = qemuExtTPMSetupCgroup(driver, def, cgroup);
+    for (i = 0; i < def->nvideos; i++) {
+        virDomainVideoDefPtr video = def->videos[i];
 
-    return ret;
+        if (video->type == VIR_DOMAIN_VIDEO_TYPE_VHOST_USER &&
+            qemuExtVhostUserGPUSetupCgroup(driver, def, video, cgroup) < 0)
+            return -1;
+    }
+
+    if (def->tpm &&
+        qemuExtTPMSetupCgroup(driver, def, cgroup) < 0)
+        return -1;
+
+    return 0;
 }
-- 
2.18.0.129.ge3331758f1