linux.git/drivers/accel/amdxdna/amdxdna_debugfs.c, branch master Linux kernel source tree accel/amdxdna: Add carveout memory support for non-IOMMU systems 2026-05-05T15:27:04+00:00 Max Zhen max.zhen@amd.com 2026-04-27T17:09:49+00:00 3cc5d7a595197e4438f8f5a4f8cc53497fb7aed6 Add support for allocating buffers from reserved carveout memory when IOMMU is not available. This is useful during debugging or bring-up. In this configuration, the device uses physical addresses and does not support scatter-gather lists, requiring physically contiguous buffers. Implement carveout-backed allocation and integrate it into buffer management to support operation in physical address mode. Signed-off-by: Max Zhen <max.zhen@amd.com> Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Link: https://patch.msgid.link/20260427170949.2666601-1-lizhi.hou@amd.com 
Add support for allocating buffers from reserved carveout memory when
IOMMU is not available. This is useful during debugging or bring-up.

In this configuration, the device uses physical addresses and does
not support scatter-gather lists, requiring physically contiguous
buffers.

Implement carveout-backed allocation and integrate it into buffer
management to support operation in physical address mode.

Signed-off-by: Max Zhen <max.zhen@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260427170949.2666601-1-lizhi.hou@amd.com