Messages in this thread Patch in this message |  | | Date | Tue, 5 May 2026 00:27:34 +0000 | | Subject | [RFC PATCH 1/4] dma: Add DMA allocation preservation KHO ABI | | From | Samiullah Khawaja <> |
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The DMA allocations can be backed by a variety of allocators. Add KHO ABI for the preservation of contiguous allocations that are done through dma-direct.
Signed-off-by: Samiullah Khawaja <skhawaja@google.com> --- include/linux/kho/abi/dma_alloc.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 include/linux/kho/abi/dma_alloc.h
diff --git a/include/linux/kho/abi/dma_alloc.h b/include/linux/kho/abi/dma_alloc.h new file mode 100644 index 000000000000..46e61db81abe --- /dev/null +++ b/include/linux/kho/abi/dma_alloc.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_KHO_ABI_DMA_ALLOC_H +#define _LINUX_KHO_ABI_DMA_ALLOC_H + +#include <linux/types.h> + +/** + * DOC: DMA Alloc ABI + * + * This header defines the structures used to serialize the state of DMA + * allocations, done by device driver, across a Live Update. + * + * Only DMA allocations done through dma-direct that are contiguous and + * allocated using alloc_page are supported. + */ + +/** + * struct dma_alloc_ser - Serialized state of a single DMA allocation + * @page_phys: Physical address of the preserved pages + * @size: Size of the DMA allocation + * @force_decrypted: Whether the memory is force decrypted in previous kernel + */ +struct dma_alloc_ser { + u64 page_phys; + u64 size; + u8 force_decrypted; + u8 padding[7]; +} __packed; + +#endif /* _LINUX_KHO_ABI_DMA_ALLOC_H */ -- 2.54.0.545.g6539524ca2-goog
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