From: Alex Bennée <[email protected]>
While ioeventfds are needed for good performance with KVM guests it
should not be a gating requirement. We can run vhost-user backends using
simulated ioeventfds or inband signalling.
With this change I can run:
$QEMU $OPTS \
-display gtk,gl=on \
-device vhost-user-gpu-pci,chardev=vhgpu \
-chardev socket,id=vhgpu,path=vhgpu.sock
with:
./contrib/vhost-user-gpu/vhost-user-gpu \
-s vhgpu.sock \
-v
and at least see things start-up - although the display gets rotated by
180 degrees. Once lightdm takes over we never make it to the login
prompt and just get a blank screen.
Signed-off-by: Alex Bennée <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Message-Id: <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Stefan Hajnoczi <[email protected]>
Reviewed-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
---
backends/vhost-user.c | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/backends/vhost-user.c b/backends/vhost-user.c
index 0596223ac4..94c6a82d52 100644
--- a/backends/vhost-user.c
+++ b/backends/vhost-user.c
@@ -20,12 +20,6 @@
#include "io/channel-command.h"
#include "hw/virtio/virtio-bus.h"
-static bool
-ioeventfd_enabled(void)
-{
- return kvm_enabled() && kvm_eventfds_enabled();
-}
-
int
vhost_user_backend_dev_init(VhostUserBackend *b, VirtIODevice *vdev,
unsigned nvqs, Error **errp)
@@ -34,11 +28,6 @@ vhost_user_backend_dev_init(VhostUserBackend *b,
VirtIODevice *vdev,
assert(!b->vdev && vdev);
- if (!ioeventfd_enabled()) {
- error_setg(errp, "vhost initialization failed: requires kvm");
- return -1;
- }
-
if (!vhost_user_init(&b->vhost_user, &b->chr, errp)) {
return -1;
}
--
MST
