drm/amdgpu:fix gmc_v9 vm fault process for SRIOV

for SRIOV we cannot use access register when in IRQ routine
with regular KIQ method
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -137,6 +137,7 @@ static int gmc_v9_0_process_interrupt(struct amdgpu_device *adev,
 	addr = (u64)entry->src_data[0] << 12;
 	addr |= ((u64)entry->src_data[1] & 0xf) << 44;
 
+	if (!amdgpu_sriov_vf(adev)) {
 		if (entry->vm_id_src) {
 			status = RREG32(mmhub->vm_l2_pro_fault_status);
 			WREG32_P(mmhub->vm_l2_pro_fault_cntl, 1, ~1);
@@ -151,6 +152,13 @@ static int gmc_v9_0_process_interrupt(struct amdgpu_device *adev,
 		  entry->vm_id_src ? "mmhub" : "gfxhub",
 		  entry->src_id, entry->ring_id, entry->vm_id, entry->pas_id,
 		  addr, entry->client_id, status);
+	} else {
+		DRM_ERROR("[%s]VMC page fault (src_id:%u ring:%u vm_id:%u pas_id:%u) "
+		  "at page 0x%016llx from %d\n",
+		  entry->vm_id_src ? "mmhub" : "gfxhub",
+		  entry->src_id, entry->ring_id, entry->vm_id, entry->pas_id,
+		  addr, entry->client_id);
+	}
 
 	return 0;
 }