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| author | Yintian Tao <yttao@amd.com> | 2020-04-07 13:08:39 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-04-13 19:01:04 +0300 |
| commit | 95a2f917387a23c8b09f4ab95e1560a69db5b1f1 (patch) | |
| tree | 5d624151bd3b42bea2996505804d25fe6123ff1b /drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | |
| parent | 9a785c7ad1d775f41c61bc380a98e710bc71347e (diff) | |
| download | linux-95a2f917387a23c8b09f4ab95e1560a69db5b1f1.tar.xz | |
drm/amdgpu: restrict debugfs register access under SR-IOV
Under bare metal, there is no more else to take
care of the GPU register access through MMIO.
Under Virtualization, to access GPU register is
implemented through KIQ during run-time due to
world-switch.
Therefore, under SR-IOV user can only access
debugfs to r/w GPU registers when meets all
three conditions below.
- amdgpu_gpu_recovery=0
- TDR happened
- in_gpu_reset=0
v2: merge amdgpu_virt_can_access_debugfs() into
amdgpu_virt_enable_access_debugfs()
v3: drop ret variable in amdgpu_virt_enable_access_debugfs()
and directly return result
Signed-off-by: Yintian Tao <yttao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h index f6ae3c656304..8f20e6dbd7a9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h @@ -265,6 +265,7 @@ struct amdgpu_virt { uint32_t gim_feature; uint32_t reg_access_mode; int req_init_data_ver; + bool tdr_debug; }; #define amdgpu_sriov_enabled(adev) \ @@ -296,6 +297,8 @@ static inline bool is_virtual_machine(void) #define amdgpu_sriov_is_pp_one_vf(adev) \ ((adev)->virt.gim_feature & AMDGIM_FEATURE_PP_ONE_VF) +#define amdgpu_sriov_is_debug(adev) \ + ((!adev->in_gpu_reset) && adev->virt.tdr_debug) bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev); void amdgpu_virt_init_setting(struct amdgpu_device *adev); @@ -314,4 +317,8 @@ int amdgpu_virt_fw_reserve_get_checksum(void *obj, unsigned long obj_size, unsigned int chksum); void amdgpu_virt_init_data_exchange(struct amdgpu_device *adev); void amdgpu_detect_virtualization(struct amdgpu_device *adev); + +bool amdgpu_virt_can_access_debugfs(struct amdgpu_device *adev); +int amdgpu_virt_enable_access_debugfs(struct amdgpu_device *adev); +void amdgpu_virt_disable_access_debugfs(struct amdgpu_device *adev); #endif |