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drm/amdgpu: Move read of snoop register from guest to host

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Guest is reading/writing to snoop register which is a security violation
We moved the code to the host driver
And also added a validation on the guest side to check if it's guest

Signed-off-by: Masha Grinman <Masha.Grinman@amd.com>
Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Masha Grinman 2025-04-03 14:08:17 -05:00 committed by Alex Deucher
parent 2aabd44aa8
commit 8ef4e99674
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
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@ -239,6 +239,9 @@ static void mmhub_v1_8_init_snoop_override_regs(struct amdgpu_device *adev)
uint32_t distance = regDAGB1_WRCLI_GPU_SNOOP_OVERRIDE -
regDAGB0_WRCLI_GPU_SNOOP_OVERRIDE;
if (amdgpu_sriov_vf(adev))
return;
inst_mask = adev->aid_mask;
for_each_inst(i, inst_mask) {
for (j = 0; j < 5; j++) { /* DAGB instances */