[PATCH 09/11] drm/amdgpu/vce2: Fix VCE 2 firmware size and offsets

Timur Kristóf
2026-04-23T01:16:31Z

The VCPU BO contains the actual FW at an offset, but
it was not calculated into the VCPU BO size.
Subtract this from the FW size to make sure there is
no out of bounds access.

This may fix VM faults when using VCE 2.

Cc: John Olender <john.olender@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/4802
Fixes: e98226221467 ("drm/amdgpu: recalculate VCE firmware BO size")
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
drivers/gpu/drm/amd/amdgpu/vce_v2_0.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v2_0.c b/drivers/gpu/drm/amd/amdgpu/vce_v2_0.c
index 00b4037d4bc89..3b493a2e94dd0 100644
--- a/drivers/gpu/drm/amd/amdgpu/vce_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v2_0.c
@@ -183,7 +183,7 @@ static void vce_v2_0_mc_resume(struct amdgpu_device *adev)
WREG32(mmVCE_LMI_VCPU_CACHE_40BIT_BAR, (adev->vce.gpu_addr >> 8));

offset = AMDGPU_VCE_FIRMWARE_OFFSET;
- size = VCE_V2_0_FW_SIZE;
+ size = VCE_V2_0_FW_SIZE - AMDGPU_VCE_FIRMWARE_OFFSET;
WREG32(mmVCE_VCPU_CACHE_OFFSET0, offset & 0x7fffffff);
WREG32(mmVCE_VCPU_CACHE_SIZE0, size);

--
2.53.0