drm/amdgpu/ttm: Make buffer copy source readonly

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When amdgpu is moving a BO from a location in VRAM to another
location in VRAM, we map both BOs in the GART and perform the
copy operation using the GART addresses.

We are not writing into the first GART window, so let's set
the PTE flags to make it readonly. This doesn't fix any known
issues but let's do it just to be safe.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Timur Kristóf 2026-07-11 13:49:59 +02:00 • committed by Alex Deucher

parent f65ae77aac

commit 48c4aaeef6

1 changed files with 7 additions and 4 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

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