diff options
| author | Oak Zeng <[email protected]> | 2021-01-23 17:34:45 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2021-03-24 02:58:27 +0000 |
| commit | 1f928f51593ca07e2b125ca862fcff687e9e498b (patch) | |
| tree | bff7e672ae0dabcbada22c9861bd69565fa4ae57 /drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c | |
| parent | drm/amdgpu: Don't reserve vram as WC for A+A (diff) | |
| download | kernel-1f928f51593ca07e2b125ca862fcff687e9e498b.tar.gz kernel-1f928f51593ca07e2b125ca862fcff687e9e498b.zip | |
drm/amdgpu: Use physical translation mode to access page table
On A+A platform, CPU write page directory and page table in cached
mode. So it is necessary for page table walker to snoop CPU cache.
This setting is necessary for page walker to snoop page directory
and page table data out of CPU cache.
Signed-off-by: Oak Zeng <[email protected]>
Acked-by: Christian Konig <[email protected]>
Reviewed-by: Felix Kuehling <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c index 6ddd53ba8b77..c6687c6cf03d 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c @@ -173,8 +173,13 @@ static void gfxhub_v1_0_init_cache_regs(struct amdgpu_device *adev) WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL3, tmp); tmp = mmVM_L2_CNTL4_DEFAULT; - tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0); - tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0); + if (adev->gmc.xgmi.connected_to_cpu) { + tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 1); + tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 1); + } else { + tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0); + tmp = REG_SET_FIELD(tmp, VM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0); + } WREG32_SOC15_RLC(GC, 0, mmVM_L2_CNTL4, tmp); } |