Am 28.05.24 um 19:23 schrieb Yunxiang Li:
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>
---
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 3d5f58e76f2d..3cf8416f8cb0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -977,6 +977,9 @@ u32 amdgpu_virt_rlcg_reg_rw(struct amdgpu_device *adev, u32 offset, u32 v, u32 f
return 0;
}
+ if (amdgpu_device_skip_hw_access(adev))
+ return 0;
+
The only other caller of this function is amdgpu_device_xcc_rreg() and
that one has the amdgpu_device_skip_hw_access() call already. So it
could be that this one is duplicated.
On the other hand an extra check doesn't really hurt us.
So either way the patch is Reviewed-by: Christian König
<christian.koenig@xxxxxxx>
Regards,
Christian.
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;
@@ -1047,6 +1050,9 @@ 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);
@@ -1064,6 +1070,9 @@ 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);
