6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yunxiang Li <Yunxiang.Li@xxxxxxx>
[ Upstream commit b3948ad1ac582f560e1f3aeaecf384619921c48d ]
Accessing registers via host is missing the check for skip_hw_access and
the lockdep check that comes with it.
Signed-off-by: Yunxiang Li <Yunxiang.Li@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 7768c756fe88..d9dc675b46ae 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -998,6 +998,9 @@ static u32 amdgpu_virt_rlcg_reg_rw(struct amdgpu_device *adev, u32 offset, u32 v
return 0;
}
+ if (amdgpu_device_skip_hw_access(adev))
+ return 0;
+
reg_access_ctrl = &adev->gfx.rlc.reg_access_ctrl[xcc_id];
scratch_reg0 = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->scratch_reg0;
scratch_reg1 = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->scratch_reg1;
@@ -1073,6 +1076,9 @@ void amdgpu_sriov_wreg(struct amdgpu_device *adev,
{
u32 rlcg_flag;
+ if (amdgpu_device_skip_hw_access(adev))
+ return;
+
if (!amdgpu_sriov_runtime(adev) &&
amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, true, &rlcg_flag)) {
amdgpu_virt_rlcg_reg_rw(adev, offset, value, rlcg_flag, xcc_id);
@@ -1090,6 +1096,9 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
{
u32 rlcg_flag;
+ if (amdgpu_device_skip_hw_access(adev))
+ return 0;
+
if (!amdgpu_sriov_runtime(adev) &&
amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, false, &rlcg_flag))
return amdgpu_virt_rlcg_reg_rw(adev, offset, 0, rlcg_flag, xcc_id);
--
2.43.0
