This is a note to let you know that I've just added the patch titled drm/amdgpu: Skip the program of MMMC_VM_AGP_* in SRIOV on MMHUB v3_0_0 to the 6.0-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amdgpu-skip-the-program-of-mmmc_vm_agp_-in-sriov.patch and it can be found in the queue-6.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 1c40ad5e1a5ab2fd8002f7b2cb55551caa8a0795 Author: Yifan Zha <Yifan.Zha@xxxxxxx> Date: Wed Jul 27 13:43:50 2022 +0800 drm/amdgpu: Skip the program of MMMC_VM_AGP_* in SRIOV on MMHUB v3_0_0 [ Upstream commit c1026c6f319724dc88fc08d9d9d35bcbdf492b42 ] [Why] VF should not program these registers, the value were defined in the host. [How] Skip writing them in SRIOV environment and program them on host side. Acked-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Yifan Zha <Yifan.Zha@xxxxxxx> Signed-off-by: Horace Chen <horace.chen@xxxxxxx> Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c index bc11b2de37ae..a1d26c4d80b8 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c @@ -169,17 +169,17 @@ static void mmhub_v3_0_init_system_aperture_regs(struct amdgpu_device *adev) uint64_t value; uint32_t tmp; - /* Disable AGP. */ - WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BASE, 0); - WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, 0); - WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, 0x00FFFFFF); - if (!amdgpu_sriov_vf(adev)) { /* * the new L1 policy will block SRIOV guest from writing * these regs, and they will be programed at host. * so skip programing these regs. */ + /* Disable AGP. */ + WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BASE, 0); + WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, 0); + WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, 0x00FFFFFF); + /* Program the system aperture low logical page number. */ WREG32_SOC15(MMHUB, 0, regMMMC_VM_SYSTEM_APERTURE_LOW_ADDR, adev->gmc.vram_start >> 18);