From 8ef4e996745b56ad6018e4120acf9ab530b72c2f Mon Sep 17 00:00:00 2001 From: Masha Grinman Date: Thu, 3 Apr 2025 14:08:17 -0500 Subject: [PATCH 3171/5403] drm/amdgpu: Move read of snoop register from guest to host 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 Reviewed-by: Harish Kasiviswanathan Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c index 4a43c9ab95a2..76167fadb292 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c @@ -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 */ -- 2.54.0