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devices: gpu: fallback to 2D backend on failed virgl backend init

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If virglrenderer as the default GPU backend failed initialization, fall
back to 2D mode to prevent crashing the VM. This configuration is still
able to support software-rendered workflows with ChromeOS' usual
virtio-wl supported windowing.

BUG=b:329522487
TEST=Crostini software rendered glxgears still works with failing
virglrenderer init.

Change-Id: I931b0a8c5662ce9726a85aaaa05565b901b727cf
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/5468982
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Commit-Queue: Ryan Neph <ryanneph@google.com>
This commit is contained in:
Ryan Neph 2024-04-19 11:59:33 -07:00 committed by crosvm LUCI
parent 02c05d6c84
commit fbe3f46963
2 changed files with 38 additions and 17 deletions
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25
devices/src/virtio/gpu/virtio_gpu.rs
View file

@ -859,12 +859,25 @@ impl VirtioGpu {
/// Gets rutabaga's capset information associated with `index`.
pub fn get_capset_info(&self, index: u32) -> VirtioGpuResult {
let (capset_id, version, size) = self.rutabaga.get_capset_info(index)?;
Ok(OkCapsetInfo {
capset_id,
version,
size,
})
if let Ok((capset_id, version, size)) = self.rutabaga.get_capset_info(index) {
Ok(OkCapsetInfo {
capset_id,
version,
size,
})
} else {
// Any capset_id > 63 is invalid according to the virtio-gpu spec, so we can
// intentionally poison the capset without stalling the guest kernel driver.
base::warn!(
"virtio-gpu get_capset_info(index={}) failed. intentionally poisoning response",
index
);
Ok(OkCapsetInfo {
capset_id: u32::max_value(),
version: 0,
size: 0,
})
}
}
/// Gets a capset from rutabaga.

30
rutabaga_gfx/src/rutabaga_core.rs
View file

@ -1177,23 +1177,26 @@ impl RutabagaBuilder {
));
}
if self.default_component == RutabagaComponentType::Rutabaga2D {
let rutabaga_2d = Rutabaga2D::init(fence_handler.clone())?;
rutabaga_components.insert(RutabagaComponentType::Rutabaga2D, rutabaga_2d);
} else {
#[allow(unused_mut)]
let mut fallback_2d = false;
if self.default_component != RutabagaComponentType::Rutabaga2D {
#[cfg(feature = "virgl_renderer")]
if self.default_component == RutabagaComponentType::VirglRenderer {
let virgl = VirglRenderer::init(
if let Ok(virgl) = VirglRenderer::init(
self.virglrenderer_flags,
fence_handler.clone(),
rutabaga_server_descriptor,
)?;
rutabaga_components.insert(RutabagaComponentType::VirglRenderer, virgl);
) {
rutabaga_components.insert(RutabagaComponentType::VirglRenderer, virgl);
push_capset(RUTABAGA_CAPSET_VIRGL);
push_capset(RUTABAGA_CAPSET_VIRGL2);
push_capset(RUTABAGA_CAPSET_VENUS);
push_capset(RUTABAGA_CAPSET_DRM);
push_capset(RUTABAGA_CAPSET_VIRGL);
push_capset(RUTABAGA_CAPSET_VIRGL2);
push_capset(RUTABAGA_CAPSET_VENUS);
push_capset(RUTABAGA_CAPSET_DRM);
} else {
log::warn!("error initializing gpu backend=virglrenderer, falling back to 2d.");
fallback_2d = true;
};
}
#[cfg(feature = "gfxstream")]
@ -1220,6 +1223,11 @@ impl RutabagaBuilder {
push_capset(RUTABAGA_CAPSET_CROSS_DOMAIN);
}
if self.default_component == RutabagaComponentType::Rutabaga2D || fallback_2d {
let rutabaga_2d = Rutabaga2D::init(fence_handler.clone())?;
rutabaga_components.insert(RutabagaComponentType::Rutabaga2D, rutabaga_2d);
}
Ok(Rutabaga {
resources: Default::default(),
contexts: Default::default(),