Re: [PATCH] drm/amdkfd: Insert missing TLB flush on GFX10 and later

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On 2023-09-11 15:00, Harish Kasiviswanathan wrote:
Heavy-weight TLB flush is required after unmap on all GPUs for
correctness and security.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@xxxxxxx>

Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>


---
  drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 3 +--
  1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index b315311dfe2a..b9950074aee0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -1466,8 +1466,7 @@ void kfd_flush_tlb(struct kfd_process_device *pdd, enum TLB_FLUSH_TYPE type);
static inline bool kfd_flush_tlb_after_unmap(struct kfd_dev *dev)
  {
-	return KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 3) ||
-	       KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 2) ||
+	return KFD_GC_VERSION(dev) > IP_VERSION(9, 4, 2) ||
  	       (KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 1) && dev->sdma_fw_version >= 18) ||
  	       KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 0);
  }



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