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| author | Philip Yang <Philip.Yang@amd.com> | 2022-04-01 15:30:12 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-04-05 10:29:47 -0400 |
| commit | 0f12a22f375400a3fc42b86a0f8c23da530fb0fc (patch) | |
| tree | 0877788955c2d8801fa3bcf6fdf1157793785a5a /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | |
| parent | 34452ac3038a7dea7e5407c0f06f762412e679f3 (diff) | |
| download | lwn-0f12a22f375400a3fc42b86a0f8c23da530fb0fc.tar.gz lwn-0f12a22f375400a3fc42b86a0f8c23da530fb0fc.zip | |
drm/amdgpu: Flush TLB after mapping for VG20+XGMI
For VG20 + XGMI bridge, all mappings PTEs cache in TC, this may have
stall invalid PTEs in TC because one cache line has 8 pages. Need always
flush_tlb after updating mapping.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index f0aec04111a3..383242952a20 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -837,6 +837,12 @@ int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm, goto error_unlock; } + /* Vega20+XGMI where PTEs get inadvertently cached in L2 texture cache, + * heavy-weight flush TLB unconditionally. + */ + flush_tlb |= adev->gmc.xgmi.num_physical_nodes && + adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 0); + memset(¶ms, 0, sizeof(params)); params.adev = adev; params.vm = vm; |