[PATCH] drm/amdgpu/virt: skip VM fault handler for VF (v2)

[Zhang, Jerry]

If that info is enough for vf.
Reviewed-by: Junwei Zhang <Jerry.Zhang at amd.com>

Regards,
Jerry (Junwei Zhang)

Linux Base Graphics
SRDC Software Development
_____________________________________


> -----Original Message-----
> From: Pixel Ding [mailto:Pixel.Ding at amd.com]
> Sent: Tuesday, February 07, 2017 14:07
> To: Zhou, David(ChunMing); Koenig, Christian; Zhang, Jerry
> Cc: amd-gfx at lists.freedesktop.org; Ding, Pixel
> Subject: [PATCH] drm/amdgpu/virt: skip VM fault handler for VF (v2)
> 
> VF uses KIQ to access registers. When VM fault occurs, the driver can't get back
> the fence of KIQ submission and runs into CPU soft lockup.
> 
> v2: print IV entry info
> 
> Signed-off-by: Pixel Ding <Pixel.Ding at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> index 7669b32..6502508 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> @@ -1237,6 +1237,13 @@ static int gmc_v8_0_process_interrupt(struct
> amdgpu_device *adev,  {
>  	u32 addr, status, mc_client;
> 
> +	if (amdgpu_sriov_vf(adev)) {
> +		dev_err(adev->dev, "GPU fault detected: %d 0x%08x\n",
> +			entry->src_id, entry->src_data);
> +		dev_err(adev->dev, " Can't decode VM fault info here on SRIOV
> VF\n");
> +		return 0;
> +	}
> +
>  	addr = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_ADDR);
>  	status = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_STATUS);
>  	mc_client =
> RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_MCCLIENT);
> --
> 2.7.4