7:50 a.m.
From: Marc-André Lureau <marcandre.lureau(a)redhat.com>
For each vhost-user GPUs,
- build a socket chardev, and pass the vhost-user socket to it
- build a vhost-user video device and associate it with the chardev
Signed-off-by: Marc-André Lureau <marcandre.lureau(a)redhat.com>
---
src/qemu/qemu_command.c | 56 +++++++++++++++++++---
tests/qemuxml2argvdata/virtio-options.args | 4 +-
2 files changed, 52 insertions(+), 8 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 0a9110f3fa..3b87952bfb 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -4526,16 +4526,23 @@ qemuBuildDeviceVideoStr(const virDomainDef *def,
virQEMUCapsPtr qemuCaps)
{
VIR_AUTOCLEAN(virBuffer) buf = VIR_BUFFER_INITIALIZER;
- const char *model;
+ const char *model = NULL;
/* We try to chose the best model for primary video device by preferring
* model with VGA compatibility mode. For some video devices on some
* architectures there might not be such model so fallback to one
* without VGA compatibility mode. */
- if (video->primary && qemuDomainSupportsVideoVga(video, qemuCaps))
- model = qemuDeviceVideoTypeToString(video->type);
- else
- model = qemuDeviceVideoSecondaryTypeToString(video->type);
+ if (video->backend == VIR_DOMAIN_VIDEO_BACKEND_TYPE_VHOSTUSER) {
+ if (video->primary && qemuDomainSupportsVideoVga(video, qemuCaps))
+ model = "vhost-user-vga";
+ else
+ model = "vhost-user-gpu";
+ } else {
+ if (video->primary && qemuDomainSupportsVideoVga(video, qemuCaps))
+ model = qemuDeviceVideoTypeToString(video->type);
+ else
+ model = qemuDeviceVideoSecondaryTypeToString(video->type);
+ }
if (!model || STREQ(model, "")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -4544,8 +4551,8 @@ qemuBuildDeviceVideoStr(const virDomainDef *def,
return NULL;
}
- if (STREQ(model, "virtio-gpu")) {
- if (qemuBuildVirtioDevStr(&buf, "virtio-gpu", qemuCaps,
+ if (STREQ(model, "virtio-gpu") || STREQ(model, "vhost-user-gpu"))
{
+ if (qemuBuildVirtioDevStr(&buf, model, qemuCaps,
VIR_DOMAIN_DEVICE_VIDEO, video) < 0) {
return NULL;
}
@@ -4588,6 +4595,10 @@ qemuBuildDeviceVideoStr(const virDomainDef *def,
if (video->heads)
virBufferAsprintf(&buf, ",max_outputs=%u",
video->heads);
}
+ } else if (video->backend == VIR_DOMAIN_VIDEO_BACKEND_TYPE_VHOSTUSER) {
+ if (video->heads)
+ virBufferAsprintf(&buf, ",max_outputs=%u", video->heads);
+ virBufferAsprintf(&buf, ",chardev=chr-vu-%s",
video->info.alias);
} else if (video->type == VIR_DOMAIN_VIDEO_TYPE_VIRTIO) {
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_GPU_MAX_OUTPUTS)) {
if (video->heads)
@@ -4699,6 +4710,23 @@ qemuBuildVgaVideoCommand(virCommandPtr cmd,
}
+static char *
+qemuBuildVhostUserChardevStr(const char *alias,
+ int *fd,
+ virCommandPtr cmd)
+{
+ char *chardev = NULL;
+
+ if (virAsprintf(&chardev, "socket,id=chr-vu-%s,fd=%d", alias, *fd) <
0)
+ return NULL;
+
+ virCommandPassFD(cmd, *fd, VIR_COMMAND_PASS_FD_CLOSE_PARENT);
+ *fd = -1;
+
+ return chardev;
+}
+
+
static int
qemuBuildVideoCommandLine(virCommandPtr cmd,
const virDomainDef *def,
@@ -4706,6 +4734,20 @@ qemuBuildVideoCommandLine(virCommandPtr cmd,
{
size_t i;
+ for (i = 0; i < def->nvideos; i++) {
+ VIR_AUTOFREE(char *) chardev = NULL;
+ virDomainVideoDefPtr video = def->videos[i];
+
+ if (video->backend == VIR_DOMAIN_VIDEO_BACKEND_TYPE_VHOSTUSER) {
+ if (!(chardev = qemuBuildVhostUserChardevStr(video->info.alias,
+ &QEMU_DOMAIN_VIDEO_PRIVATE(video)->vhost_user_fd,
+ cmd)))
+ return -1;
+
+ virCommandAddArgList(cmd, "-chardev", chardev, NULL);
+ }
+ }
+
for (i = 0; i < def->nvideos; i++) {
VIR_AUTOFREE(char *) str = NULL;
virDomainVideoDefPtr video = def->videos[i];
diff --git a/tests/qemuxml2argvdata/virtio-options.args
b/tests/qemuxml2argvdata/virtio-options.args
index 92bce8283c..79216a5503 100644
--- a/tests/qemuxml2argvdata/virtio-options.args
+++ b/tests/qemuxml2argvdata/virtio-options.args
@@ -49,7 +49,9 @@ ats=on \
ats=on \
-device virtio-input-host-pci,id=input3,evdev=/dev/input/event1234,bus=pci.0,\
addr=0x12,iommu_platform=on,ats=on \
--device virtio-gpu-pci,id=video0,bus=pci.0,addr=0x2,iommu_platform=on,ats=on \
+-chardev socket,id=chr-vu-video0,fd=0 \
+-device vhost-user-gpu-pci,id=video0,max_outputs=1,chardev=chr-vu-video0,\
+bus=pci.0,addr=0x2,iommu_platform=on,ats=on \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0xc,iommu_platform=on,\
ats=on \
-object rng-random,id=objrng0,filename=/dev/random \
--
2.23.0