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

[Emily Deng]

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

Signed-off-by: Emily Deng <emily.d...@amd.com>
---
 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