kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c, branch v6.19.11

drm/amdgpu: Skip loading SDMA_RS64 in VF

2026-03-04T12:19:59+00:00

[ Upstream commit 39c21b81112321cbe1267b02c77ecd2161ce19aa ] VFs use the PF SDMA ucode and are unable to load SDMA_RS64. Signed-off-by: YuBiao Wang Signed-off-by: Victor Skvortsov Reviewed-by: Gavin Wan Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amdgpu: Add lock to serialize sriov command execution

2025-11-14T16:28:07+00:00

Add lock to serialize sriov command execution. Signed-off-by: YiPeng Chai Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Fix pointer casts when reading dynamic region sizes

2025-10-28T13:55:16+00:00

The function amdgpu_virt_get_dynamic_data_info() writes a 64-bit size value. In two places (amdgpu_bios.c and amdgpu_discovery.c), the code passed the address of a smaller variable by casting it to u64 *, which is unsafe. This could make the function write more bytes than the smaller variable can hold, possibly overwriting nearby memory. Reported by static analysis tools. v2: Dynamic region size comes from the host (SR-IOV setup) and is always fixed to 5 MB. (Lijo/Ellen) 5 MB easily fits inside a 32-bit value, so using a 64-bit type is not needed. It also avoids extra type casts Fixes: b4a8fcc7826a ("drm/amdgpu: Add logic for VF ipd and VF bios to init from dynamic crit_region offsets") Reported by: Dan Carpenter Cc: Ellen Pan Cc: Christian König Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amdgpu: Make SR-IOV critical region checks overflow-safe

2025-10-28T13:52:44+00:00

The function amdgpu_virt_init_critical_region() contained an invalid check for a negative init_hdr_offset value: if (init_hdr_offset < 0) Since init_hdr_offset is an unsigned 32-bit integer, this condition can never be true and triggers a Smatch warning: warn: unsigned 'init_hdr_offset' is never less than zero In addition, the subsequent bounds check: if ((init_hdr_offset + init_hdr_size) > vram_size) was vulnerable to integer overflow when adding the two unsigned values. Thus, by promoting offset and size to 64-bit and using check_add_overflow() to safely validate the sum against VRAM size. Fixes: 07009df6494d ("drm/amdgpu: Introduce SRIOV critical regions v2 during VF init") Reported by: Dan Carpenter Cc: Ellen Pan Cc: Christian König Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Ellen Pan Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Add logic for VF data exchange region to init from dynamic crit_region offsets

2025-10-20T22:28:14+00:00

1. Added VF logic to init data exchange region using the offsets from dynamic(v2) critical regions; Signed-off-by: Ellen Pan Acked-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Add logic for VF ipd and VF bios to init from dynamic crit_region offsets

2025-10-20T22:28:11+00:00

1. Added VF logic in amdgpu_virt to init IP discovery using the offsets from dynamic(v2) critical regions; 2. Added VF logic in amdgpu_virt to init bios image using the offsets from dynamic(v2) critical regions; Signed-off-by: Ellen Pan Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amdgpu: Reuse fw_vram_usage_* for dynamic critical region in SRIOV

2025-10-20T22:28:08+00:00

- During guest driver init, asa VFs receive PF msg to init dynamic critical region(v2), VFs reuse fw_vram_usage_* from ttm to store critical region tables in a 5MB chunk. Signed-off-by: Ellen Pan Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Introduce SRIOV critical regions v2 during VF init

2025-10-20T22:28:05+00:00

1. Introduced amdgpu_virt_init_critical_region during VF init. - VFs use init_data_header_offset and init_data_header_size_kb transmitted via PF2VF mailbox to fetch the offset of critical regions' offsets/sizes in VRAM and save to adev->virt.crit_region_offsets and adev->virt.crit_region_sizes_kb. Signed-off-by: Ellen Pan Reviewed-by: Alex Deucher Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amdgpu: Add SRIOV crit_region_version support

2025-10-20T22:27:58+00:00

1. Added enum amd_sriov_crit_region_version to support multi versions 2. Added logic in SRIOV mailbox to regonize crit_region version during req_gpu_init_data Signed-off-by: Ellen Pan Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Updated naming of SRIOV critical region offsets/sizes with _V1 suffix

2025-10-20T22:27:52+00:00

- This change prepares the later patches to intro _v2 suffix to SRIOV critical regions Signed-off-by: Ellen Pan Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher