Ryan Neph e246fff20c rutabaga_gfx: support fence handling via async callback ... Adds another method for fencing where a rutabaga component may provide an asynchronous callback for fence completion. When this method is enabled, fences no longer need to be polled on the main thread. When async_fence_cb is enabled, optional polling still occurs for Rutabaga Components that still rely on it for other purposes (e.g. virglrenderer for GL query checking). Both the old and new methods of fence handling are supported with this CL; e.g. timer-based polling and async callback, but timer-based polling is the only one active. Follow-up CL(s) will switch to using the async callback for each RutabagaComponent. Support for the old timer-based polling will be removed after the async callback method stabilizes in production. Also, use a BTreeMap rather a HashMap since we only expect a dozen or so entries at most. In such cases, a BTreeMap is faster. * v1 (lfrb@collabora.com): remove all polling + add async_cb * v2 (ryanneph@google.com): re-introduce optional polling to fix virglrenderer that relies on it for GL query checking. * v3 (ryanneph@google.com): replace timer-based polling with eventfd-based poll() signaling for components that want to use it. * v4 (ryanneph@google.com): add async fence handling beside timer-based polling to support both for a short time. This is a pseudo-reland of commit a999284da2, but modifications have been made to support both fencing methods simultaneously. BUG=b:175527587 TEST=cargo build --features=virgl_renderer,virgl_renderer_next,gfxstream TEST=Run glxgears and vkcube in a crosvm guest VM with virglrenderer Change-Id: I28f754aeef01972a01dab7990267415814a36c77 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3628299 Tested-by: kokoro <noreply+kokoro@google.com> Commit-Queue: Ryan Neph <ryanneph@google.com> Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>		2022-05-11 19:44:13 +00:00
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src	rutabaga_gfx: support fence handling via async callback	2022-05-11 19:44:13 +00:00
Cargo.toml	devices: Upstream Windows vhost-user net device.	2022-04-07 01:19:21 +00:00