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linux.rs: create a socket between gpu device and host

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The GPU process needs to access KVM from host coherent
memory.

BUG=chromium:924405
TEST=compile

Change-Id: I3db9dce044e2a5cc816f48f28d943024dad7e7eb
Reviewed-on: https://chromium-review.googlesource.com/1626792
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This commit is contained in:
Gurchetan Singh 2019-05-15 09:46:52 -07:00 committed by chrome-bot
parent 53edb817da
commit 96beafc1c1
1 changed files with 10 additions and 0 deletions
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10
src/linux.rs
View file

@ -535,6 +535,7 @@ fn create_net_device(
fn create_gpu_device(
cfg: &Config,
exit_evt: &EventFd,
_gpu_device_socket: VmMemoryControlRequestSocket,
gpu_socket: virtio::resource_bridge::ResourceResponseSocket,
wayland_socket_path: &Path,
) -> DeviceResult {
@ -693,6 +694,7 @@ fn create_virtio_devices(
mem: &GuestMemory,
_exit_evt: &EventFd,
wayland_device_socket: VmMemoryControlRequestSocket,
gpu_device_socket: VmMemoryControlRequestSocket,
balloon_device_socket: BalloonControlResponseSocket,
disk_device_sockets: &mut Vec<DiskControlResponseSocket>,
) -> DeviceResult<Vec<VirtioDeviceStub>> {
@ -759,6 +761,7 @@ fn create_virtio_devices(
devs.push(create_gpu_device(
cfg,
_exit_evt,
gpu_device_socket,
gpu_socket,
wayland_socket_path,
)?);
@ -793,6 +796,7 @@ fn create_devices(
mem: &GuestMemory,
exit_evt: &EventFd,
wayland_device_socket: VmMemoryControlRequestSocket,
gpu_device_socket: VmMemoryControlRequestSocket,
balloon_device_socket: BalloonControlResponseSocket,
disk_device_sockets: &mut Vec<DiskControlResponseSocket>,
usb_provider: HostBackendDeviceProvider,
@ -802,6 +806,7 @@ fn create_devices(
mem,
exit_evt,
wayland_device_socket,
gpu_device_socket,
balloon_device_socket,
disk_device_sockets,
)?;
@ -1179,6 +1184,10 @@ pub fn run_config(cfg: Config) -> Result<()> {
disk_device_sockets.push(disk_device_socket);
}
let (gpu_host_socket, gpu_device_socket) =
msg_socket::pair::<VmMemoryResponse, VmMemoryRequest>().map_err(Error::CreateSocket)?;
control_sockets.push(TaggedControlSocket::VmMemory(gpu_host_socket));
let sandbox = cfg.sandbox;
let linux = Arch::build_vm(
components,
@ -1190,6 +1199,7 @@ pub fn run_config(cfg: Config) -> Result<()> {
m,
e,
wayland_device_socket,
gpu_device_socket,
balloon_device_socket,
&mut disk_device_sockets,
usb_provider,