[PATCH 5/6] drm/amdgpu: fix sdma ring test fail when resume from hibernation

[Christian König]

Am 14.04.25 um 12:46 schrieb Samuel Zhang:
> gart tlb may be staled when switch to a new gpu index. this cause gpu
> fetchs wrong data from gtt memory. Flush gart tlb at the end of gmc
> resume to fix it.

Well that's complete nonsense. When the TLB contains entries after a resume than that is a major bug in the hypervisor.

Christian.

>
> Signed-off-by: Samuel Zhang <guoqing.zhang at amd.com>
> Change-Id: If2a3780319f5ecf3dcb0f1c07f85151ed65f522d
> ---
>  drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> index 73ac05b9a1bf..0e7957b4389a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> @@ -2543,7 +2543,7 @@ static int gmc_v9_0_resume(struct amdgpu_ip_block *ip_block)
>  		return r;
>  
>  	amdgpu_vmid_reset_all(ip_block->adev);
> -
> +	amdgpu_gart_invalidate_tlb(adev);
>  	return 0;
>  }
>