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| author | Jacob He <jacob.he@amd.com> | 2020-02-27 21:17:40 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-02-28 16:59:21 -0500 |
| commit | 460c484f2411b1f3d291a3237d1bab7327448f01 (patch) | |
| tree | 82348223160cababc8594779a50d9a1fbd1534dd /drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | |
| parent | 89510a2737ae6515dcc5e6cbd3cf588753d4fa17 (diff) | |
| download | linux-460c484f2411b1f3d291a3237d1bab7327448f01.tar.gz linux-460c484f2411b1f3d291a3237d1bab7327448f01.tar.bz2 linux-460c484f2411b1f3d291a3237d1bab7327448f01.zip | |
drm/amdgpu: Initialize SPM_VMID with 0xf (v2)
SPM_VMID is a global resource, SPM access the video memory according to
SPM_VMID. The initial valude of SPM_VMID is 0 which is used by kernel.
That means UMD can overwrite the memory of VMID0 by enabling SPM, that
is really dangerous.
Initialize SPM_VMID with 0xf, it messes up other user mode process at
most.
v2: squash in indentation fix
Signed-off-by: Jacob He <jacob.he@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/gfx_v8_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index e63f98b2d389..393a1324daa9 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -1318,6 +1318,10 @@ static int gfx_v8_0_rlc_init(struct amdgpu_device *adev) return r; } + /* init spm vmid with 0xf */ + if (adev->gfx.rlc.funcs->update_spm_vmid) + adev->gfx.rlc.funcs->update_spm_vmid(adev, 0xf); + return 0; } @@ -5594,6 +5598,18 @@ static void gfx_v8_0_unset_safe_mode(struct amdgpu_device *adev) } } +static void gfx_v8_0_update_spm_vmid(struct amdgpu_device *adev, unsigned vmid) +{ + u32 data; + + data = RREG32(mmRLC_SPM_VMID); + + data &= ~RLC_SPM_VMID__RLC_SPM_VMID_MASK; + data |= (vmid & RLC_SPM_VMID__RLC_SPM_VMID_MASK) << RLC_SPM_VMID__RLC_SPM_VMID__SHIFT; + + WREG32(mmRLC_SPM_VMID, data); +} + static const struct amdgpu_rlc_funcs iceland_rlc_funcs = { .is_rlc_enabled = gfx_v8_0_is_rlc_enabled, .set_safe_mode = gfx_v8_0_set_safe_mode, @@ -5605,7 +5621,8 @@ static const struct amdgpu_rlc_funcs iceland_rlc_funcs = { .resume = gfx_v8_0_rlc_resume, .stop = gfx_v8_0_rlc_stop, .reset = gfx_v8_0_rlc_reset, - .start = gfx_v8_0_rlc_start + .start = gfx_v8_0_rlc_start, + .update_spm_vmid = gfx_v8_0_update_spm_vmid }; static void gfx_v8_0_update_medium_grain_clock_gating(struct amdgpu_device *adev, |