linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c, branch v7.2-rc2

drm/amdgpu/gfx: fix cleaner shader IB buffer overflow

2026-06-17T22:13:35+00:00

The cleaner shader sysfs path allocates a 16-dword (64 byte) IB but
incorrectly fills (align_mask + 1) dwords. On GFX rings align_mask is
0xff, so the loop wrote 256 dwords into a 64-byte buffer, causing a
kernel page fault.

The IB only needs to be a minimal NOP shell to schedule the job; the
cleaner shader itself is emitted on the ring via emit_cleaner_shader().
Fill 16 dwords to match the allocation.

v2: Use ib_size_dw variable (Lijo)

Fixes: d361ad5d2fc0 ("drm/amdgpu: Add sysfs interface for running cleaner shader")
Suggested-by: Lijo Lazar 
Signed-off-by: Asad Kamal 
Reviewed-by: Lijo Lazar 
Signed-off-by: Alex Deucher 
(cherry picked from commit bf21af331ebf72d0935fd70c73192414a422c03a)
CC: stable@vger.kernel.org

drm/amdgpu/ras: add ras_suspend callback and use it for cp_ecc_error_irq

2026-06-03T17:59:29+00:00

cp_ecc_error_irq is acquired in amdgpu_gfx_ras_late_init() but
released in gfx_v9_0_hw_fini(), so the put site has to query
amdgpu_irq_enabled() because the get is skipped on SR-IOV VF.

ras_late_init / ras_fini have no suspend counterpart, so move the
put to amdgpu_gfx_ras_suspend() / amdgpu_gfx_ras_fini() and add a
matching ras_suspend callback that is invoked from
amdgpu_ras_suspend() before disable_all_features().  The get and
put now sit in the same place and check the same condition (not
VF, funcs registered), no refcount querying needed.

An active flag gates ras_fini so the
suspend-then-unload-without-resume path falls into
amdgpu_ras_block_late_fini_default() instead of double-releasing
what ras_suspend already cleaned up.

Drop the cp_ecc_error_irq put from gfx_v9_0_hw_fini().  gfx_v8_0
manages cp_ecc_error_irq locally and is unaffected; no other GFX
generation has this IRQ.

Signed-off-by: Yunxiang Li 
Acked-by: Alex Deucher 
Signed-off-by: Alex Deucher

drm/amdgpu: deduplicate ring preempt ib function

2026-05-05T13:56:29+00:00

The ring preemption function is identical for both gfx_v11_0 and
gfx_v12_0. This patch refactors the code by moving the core logic
into a generic function inside amdgpu_gfx.c to reduce code
duplication and simplify future maintenance.

Reviewed-by: Christian König 
Signed-off-by: Leonardo Cesar 
Signed-off-by: Alex Deucher

drm/amdgpu: Remove sys file compute_partition_mem_alloc_mode at module unload

2026-04-17T18:45:26+00:00

Module reload would fail when create sys file that was not removed during
module unload.

Fixes: e0e9792ea2d4 ("drm/amdgpu: add an option to allow gpu partition allocate all available memory")
Signed-off-by: Xiaogang Chen 
Reviewed-by: Philip Yang 
Signed-off-by: Alex Deucher

drm/amdgpu: add an option to allow gpu partition allocate all available memory

2026-04-03T17:50:29+00:00

Current driver reports and limits memory allocation for each partition equally
among partitions using same memory partition. Application may not be able to
use all available memory when run on a partitioned gpu though system still has
enough free memory.

Add an option that app can use to have gpu partition allocate all available
memory.

Signed-off-by: Xiaogang Chen 
Reviewed-by: Philip Yang 
Signed-off-by: Alex Deucher

drm/amdgpu: Add CU mask support for MQD properties

2026-02-23T19:16:30+00:00

Add new fields to the amdgpu_mqd_prop structure to track CU (Compute Unit)
mask information, including the mask itself, count, flags, and a flag to
indicate if user-specified CU masking is active.

v2: Create a generic function amdgpu_gfx_mqd_symmetrically_map_cu_mask()

Suggested-by: Alex Deucher 
Signed-off-by: Jesse Zhang 
Reviewed-by: Alex Deucher 
Signed-off-by: Alex Deucher

drm/amdgpu: Use AMDGPU_MQD_SIZE_ALIGN in KGD

2026-01-29T17:26:55+00:00

Use AMDGPU_MQD_SIZE_ALIGN for both kernel and user queue.

Signed-off-by: Lang Yu 
Reviewed-by: David Belanger 
Reviewed-by: Hawking Zhang 
Reviewed-by: Mukul Joshi 
Signed-off-by: Alex Deucher

drm/amdgpu: Avoid excessive dmesg log

2026-01-21T19:25:31+00:00

KIQ access is not guaranteed to work reliably under all reset
situations. Avoid flooding dmesg with HDP flush failure messages.

Signed-off-by: Lijo Lazar 
Acked-by: Alex Deucher 
Signed-off-by: Alex Deucher

drm/amd: Convert DRM_() to drm_()

2026-01-05T21:59:55+00:00

The drm_*() macros include the device which is helpful for debugging
issues in multi-GPU systems.

Signed-off-by: Mario Limonciello (AMD) 
Reviewed-by: Aurabindo Pillai 
Signed-off-by: Alex Deucher

drm/amd: Drop amdgpu prefix from message prints