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Commit edcafc02 authored by Pixel Ding's avatar Pixel Ding Committed by Alex Deucher
Browse files

drm/amdgpu/virt: skip VM fault handler for VF 



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.

Signed-off-by: default avatarPixel Ding <Pixel.Ding@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarJunwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 4726214c

drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c

+7 −0
Original line number Diff line number Diff line
@@ -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);