From: Oak Zeng oak.zeng@intel.com
[ Upstream commit 0af944f0e3082ff517958b1cea76fb9b8cb379dd ]
This is a follow up fix for https://patchwork.freedesktop.org/patch/msgid/20241203021929.1919730-1-oak.z... The overall goal is to fail vm_bind when there is memory pressure. See more details in the commit message of above patch. Abbove patch fixes the issue when user pass in a vm_id parameter during gem_create. If user doesn't pass in a vm_id during gem_create, above patch doesn't help.
This patch further reject BO eviction (which could be triggered by bo validation) if BO is bound to the current VM. vm_bind could fail due to the eviction failure. The BO to VM reverse mapping structure is used to determine whether BO is bound to VM.
v2: Move vm_bo definition from function scope to if(evict) clause (Thomas) Further constraint the condition by adding ctx->resv (Thomas) Add a short comment describe the change.
Suggested-by: Thomas Hellström thomas.hellstrom@linux.intel.com Signed-off-by: Oak Zeng oak.zeng@intel.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com Signed-off-by: Thomas Hellström thomas.hellstrom@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20250110210137.3181576-1-oak.z... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/xe/xe_bo.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c index d1eb87cb178bd..2070aa12059ce 100644 --- a/drivers/gpu/drm/xe/xe_bo.c +++ b/drivers/gpu/drm/xe/xe_bo.c @@ -713,6 +713,21 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict, goto out; }
+ /* Reject BO eviction if BO is bound to current VM. */ + if (evict && ctx->resv) { + struct drm_gpuvm_bo *vm_bo; + + drm_gem_for_each_gpuvm_bo(vm_bo, &bo->ttm.base) { + struct xe_vm *vm = gpuvm_to_vm(vm_bo->vm); + + if (xe_vm_resv(vm) == ctx->resv && + xe_vm_in_preempt_fence_mode(vm)) { + ret = -EBUSY; + goto out; + } + } + } + /* * Failed multi-hop where the old_mem is still marked as * TTM_PL_FLAG_TEMPORARY, should just be a dummy move.