[PATCH v2] drm/amdgpu: set vm_update_mode=0 as default for Sienna Cichlid in SRIOV case

[Danijel Slivka]

CPU pagetable updates have issues with HDP flush as VF MMIO access
protection is not allowing write during sriov runtime to
mmBIF_BX_DEV0_EPF0_VF0_HDP_MEM_COHERENCY_FLUSH_CNTL

Signed-off-by: Danijel Slivka <danijel.slivka at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 83b0c5d86e48..32088ac0666c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2338,7 +2338,9 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev)
 	 */
 #ifdef CONFIG_X86_64
 	if (amdgpu_vm_update_mode == -1) {
-		if (amdgpu_gmc_vram_full_visible(&adev->gmc))
+		if (amdgpu_gmc_vram_full_visible(&adev->gmc) &&
+		    !(adev->asic_type == CHIP_SIENNA_CICHLID &&
+		    amdgpu_sriov_vf(adev)))
 			adev->vm_manager.vm_update_mode =
 				AMDGPU_VM_USE_CPU_FOR_COMPUTE;
 		else
-- 
2.25.1