[PATCH] drm/amdkfd: Don't over commit vram while xnack is off

[Emily Deng <Emily.Deng@xxxxxxx>]

For xnack is off, the application should ensure the vram not overcommit.

Signed-off-by: Emily Deng <Emily.Deng@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c
index 1ef758ac5076..1aad27994452 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c
@@ -171,11 +171,17 @@ static void amdkfd_fence_release(struct dma_fence *f)
 bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm)
 {
 	struct amdgpu_amdkfd_fence *fence = to_amdgpu_amdkfd_fence(f);
+	struct kfd_process *p;
 
 	if (!fence)
 		return false;
 	else if (fence->mm == mm  && !fence->svm_bo)
 		return true;
+	else if (fence->svm_bo) {
+		p = kfd_lookup_process_by_mm(mm);
+		if (p && !p->xnack_enabled)
+			return true;
+	}
 
 	return false;
 }
-- 
2.36.1