[PATCH 2/2] drm/amdgpu: set the executable flag on unused Vega10 PTEs

[Deucher, Alexander]

Series is:

Acked-by: Alex Deucher <alexander.deucher at amd.com>

________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Christian König <ckoenig.leichtzumerken at gmail.com>
Sent: Wednesday, January 2, 2019 8:35:06 AM
To: amd-gfx at lists.freedesktop.org
Subject: [PATCH 2/2] drm/amdgpu: set the executable flag on unused Vega10 PTEs

Otherwise we run into a non-retry fault on access.

It seems to be a hardware bug that the executable bit has
higher priority than the valid bit.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index e73d152659a2..01a68f4e17d4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -799,9 +799,15 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
                 addr += ats_entries * 8;
         }

-       if (entries)
+       if (entries) {
+               uint64_t value = 0;
+
+               if (level == AMDGPU_VM_PTB && adev->asic_type >= CHIP_VEGA10)
+                       value = AMDGPU_PTE_EXECUTABLE;
+
                 amdgpu_vm_set_pte_pde(adev, &job->ibs[0], addr, 0,
-                                     entries, 0, 0);
+                                     entries, 0, value);
+       }

         amdgpu_ring_pad_ib(ring, &job->ibs[0]);

--
2.17.1

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