[PATCH] drm/amdgpu: Do not program VF copy regs in mmhub v1.8 under SRIOV

[Victor Lu]

MC_VM_AGP_* registers should not be programmed by guest driver.

Signed-off-by: Victor Lu <victorchengchi.lu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
index ea142611be1c..125917c3cba1 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
@@ -132,6 +132,9 @@ static void mmhub_v1_8_init_system_aperture_regs(struct amdgpu_device *adev)
 
 	inst_mask = adev->aid_mask;
 	for_each_inst(i, inst_mask) {
+		if (amdgpu_sriov_vf(adev))
+			return;
+
 		/* Program the AGP BAR */
 		WREG32_SOC15(MMHUB, i, regMC_VM_AGP_BASE, 0);
 		WREG32_SOC15(MMHUB, i, regMC_VM_AGP_BOT,
@@ -139,9 +142,6 @@ static void mmhub_v1_8_init_system_aperture_regs(struct amdgpu_device *adev)
 		WREG32_SOC15(MMHUB, i, regMC_VM_AGP_TOP,
 			     adev->gmc.agp_end >> 24);
 
-		if (amdgpu_sriov_vf(adev))
-			return;
-
 		/* Program the system aperture low logical page number. */
 		WREG32_SOC15(MMHUB, i, regMC_VM_SYSTEM_APERTURE_LOW_ADDR,
 			min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18);
-- 
2.34.1