Am 14.09.22 um 00:16 schrieb Mukul Joshi:
This patch updates the PTE flags when translate further (TF) is
enabled:
- With translate_further enabled, invalid PTEs can be 0. Reading
consecutive invalid PTEs as 0 is considered a fault. To prevent
this, ensure invalid PTEs have at least 1 bit set.
- The current invalid PTE flags settings to translate a retry fault
into a no-retry fault, doesn't work with TF enabled. As a result,
update invalid PTE flags settings which works for both TF enabled
and disabled case.
Fixes: 2abf2573b1c69 ("drm/amdgpu: Enable translate_further to extend UTCL2 reach")
Signed-off-by: Mukul Joshi <mukul.joshi@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 +--
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 7 +++++--
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 59cac347baa3..690fd4f639f1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2484,8 +2484,7 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
/* Intentionally setting invalid PTE flag
* combination to force a no-retry-fault
*/
- flags = AMDGPU_PTE_EXECUTABLE | AMDGPU_PDE_PTE |
- AMDGPU_PTE_TF;
+ flags = AMDGPU_PTE_SNOOPED | AMDGPU_PTE_PRT;
value = 0;
} else if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_NEVER) {
/* Redirect the access to the dummy page */
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 4603653916f5..67ca16a8027c 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1103,10 +1103,13 @@ static void gmc_v9_0_get_vm_pde(struct amdgpu_device *adev, int level,
*flags |= AMDGPU_PDE_BFS(0x9);
} else if (level == AMDGPU_VM_PDB0) {
- if (*flags & AMDGPU_PDE_PTE)
+ if (*flags & AMDGPU_PDE_PTE) {
*flags &= ~AMDGPU_PDE_PTE;
- else
+ if (!(*flags & AMDGPU_PTE_VALID))
+ *addr |= 1 << PAGE_SHIFT;
+ } else {
*flags |= AMDGPU_PTE_TF;
+ }
}
}
