drm/amdgpu: Remove writing GRBM_GFX_CNTL in RLCG interface under SRIOV

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[Why]
Accessing GRBM_GFX_CNTL in full access time has risk when VF is doing MMIO attacking.
Therefore, VF writing GRBM_GFX_CNTL are blocked by L1 Policy.
For RLCG interface, RLCG use SCRATCH_REG2 which is copied from GRBM_GFX_CNTL.

[How]
Remove writing GRBM_GFX_CNTL in amdgpu_virt_rlcg_reg_rw.

v2:
Remove directly writing GRBM_GFX_INDEX in amdgpu_virt_rlcg_reg_rw
as RLCG interface no need to use it.

Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Yifan Zha 2023-01-31 15:31:27 +08:00 • committed by Alex Deucher

parent 11cc4652e9

commit 72fef4980d

1 changed files with 0 additions and 2 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c

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