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| author | Dave Airlie <airlied@redhat.com> | 2023-09-08 10:35:17 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2023-09-08 10:35:57 +1000 |
| commit | 51eed9d4ce21f969894b2bc89eb5444b76615f54 (patch) | |
| tree | 03f25335f84201e124ab0ae1af297a0e1fbc12a8 | |
| parent | d9809d242ff501734e716634e0b3f3e0dce823ec (diff) | |
| parent | 5eefc5307c983b59344a4cb89009819f580c84fa (diff) | |
| download | linux-51eed9d4ce21f969894b2bc89eb5444b76615f54.tar.gz | |
Merge tag 'drm-intel-next-fixes-2023-08-31' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
- Mark requests for GuC virtual engines to avoid use-after-free (Andrzej).
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZPEGEeP2EwCtx9hM@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_types.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 7 |
3 files changed, 6 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h index e99a6fa03d4539..a7e6775980043c 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h @@ -58,6 +58,7 @@ struct i915_perf_group; typedef u32 intel_engine_mask_t; #define ALL_ENGINES ((intel_engine_mask_t)~0ul) +#define VIRTUAL_ENGINES BIT(BITS_PER_TYPE(intel_engine_mask_t) - 1) struct intel_hw_status_page { struct list_head timelines; diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index a0e3ef1c65d246..b5b7f2fe8c78e4 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -5470,6 +5470,9 @@ guc_create_virtual(struct intel_engine_cs **siblings, unsigned int count, ve->base.flags = I915_ENGINE_IS_VIRTUAL; + BUILD_BUG_ON(ilog2(VIRTUAL_ENGINES) < I915_NUM_ENGINES); + ve->base.mask = VIRTUAL_ENGINES; + intel_context_init(&ve->context, &ve->base); for (n = 0; n < count; n++) { diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index 7c7da284990df7..f59081066a197a 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -134,9 +134,7 @@ static void i915_fence_release(struct dma_fence *fence) i915_sw_fence_fini(&rq->semaphore); /* - * Keep one request on each engine for reserved use under mempressure - * do not use with virtual engines as this really is only needed for - * kernel contexts. + * Keep one request on each engine for reserved use under mempressure. * * We do not hold a reference to the engine here and so have to be * very careful in what rq->engine we poke. The virtual engine is @@ -166,8 +164,7 @@ static void i915_fence_release(struct dma_fence *fence) * know that if the rq->execution_mask is a single bit, rq->engine * can be a physical engine with the exact corresponding mask. */ - if (!intel_engine_is_virtual(rq->engine) && - is_power_of_2(rq->execution_mask) && + if (is_power_of_2(rq->execution_mask) && !cmpxchg(&rq->engine->request_pool, NULL, rq)) return; |