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

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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: Pixel Ding <Pixel.Ding@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Pixel Ding
2017-02-06 17:32:22 +08:00
committed by Alex Deucher
parent 4726214c54
commit edcafc0294
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
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@@ -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);