From: Gavin Wan Date: Mon, 3 Apr 2023 21:49:41 +0000 (-0400) Subject: drm/amdgpu: Skip using MC FB Offset when APU flag is set for SRIOV. X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b0a3bbf947f6ed690336cec1f6cde2a30d082dbb;p=linux.git drm/amdgpu: Skip using MC FB Offset when APU flag is set for SRIOV. The MC_VM_FB_OFFSET is PF only register. It cannot be read on VF. So, the driver should not use MC_VM_FB_OFFSET address to set the address of dev->gmc.aper_base. Signed-off-by: Gavin Wan Reviewed-by: Zhigang Luo Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index 1653d77df3ba3..58bcd1e1f1b6e 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -1644,7 +1644,8 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev) */ /* check whether both host-gpu and gpu-gpu xgmi links exist */ - if (((adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev)) || + if ((!amdgpu_sriov_vf(adev) && + (adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev)) || (adev->gmc.xgmi.supported && adev->gmc.xgmi.connected_to_cpu)) { adev->gmc.aper_base =