diff options
| author | Samuel Zhang <[email protected]> | 2025-05-08 06:36:35 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2025-06-18 16:19:15 +0000 |
| commit | 4108c2be12ebe78accb40d43f4713a7cc481b18a (patch) | |
| tree | c3c8e9f0679ee0968f0262d9cb43418b7aa2413e /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | |
| parent | drm/amdgpu: enable pdb0 for hibernation on SRIOV (diff) | |
| download | kernel-4108c2be12ebe78accb40d43f4713a7cc481b18a.tar.gz kernel-4108c2be12ebe78accb40d43f4713a7cc481b18a.zip | |
drm/amdgpu: fix fence fallback timer expired error
IH is not working after switching a new gpu index for the first time.
During VM resume, QEMU programming of VF MSIX table (register GFXMSIX_VECT0_ADDR_LO)
may not work.The access could be blocked by nBIF protection as VF isn't in
exclusive access mode. Exclusive access is enabled now, disable/enable MSIX
so that QEMU reprograms MSIX table.
call amdgpu_restore_msix on resume to restore msix table.
Signed-off-by: Samuel Zhang <[email protected]>
Acked-by: Lijo Lazar <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 13708dc7706a..b16f7c4beb22 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -5109,6 +5109,13 @@ static inline int amdgpu_virt_resume(struct amdgpu_device *adev) int r; unsigned int prev_physical_node_id = adev->gmc.xgmi.physical_node_id; + /* During VM resume, QEMU programming of VF MSIX table (register GFXMSIX_VECT0_ADDR_LO) + * may not work. The access could be blocked by nBIF protection as VF isn't in + * exclusive access mode. Exclusive access is enabled now, disable/enable MSIX + * so that QEMU reprograms MSIX table. + */ + amdgpu_restore_msix(adev); + r = adev->gfxhub.funcs->get_xgmi_info(adev); if (r) return r; |