Kirill A. Shutemov dfcf2e017f swiotlb: do not zero buffer in set_memory_decrypted() ...

For larger TDX VM, memset() after set_memory_decrypted() in
swiotlb_update_mem_attributes() takes substantial portion of boot time.

Zeroing doesn't serve any functional purpose. Malicious VMM can mess
with decrypted/shared buffer at any point.

Remove the memset().

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

2022-01-26 17:05:54 +01:00

..

coherent.c

dma-mapping: use 'bitmap_zalloc()' when applicable

2021-10-27 08:20:09 +02:00

contiguous.c

dma-contiguous: fix a typo error in a comment

2020-11-27 10:33:42 +01:00

debug.c

dma-debug: teach add_dma_entry() about DMA_ATTR_SKIP_CPU_SYNC

2021-10-18 12:46:45 +02:00

debug.h

dma-debug: teach add_dma_entry() about DMA_ATTR_SKIP_CPU_SYNC

2021-10-18 12:46:45 +02:00

direct.c

dma-direct: add a dma_direct_use_pool helper

2021-12-08 16:46:35 +01:00

direct.h

swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing

2021-07-13 20:04:43 -04:00

dummy.c

dma-mapping: return error code from dma_dummy_map_sg()

2021-08-09 17:13:06 +02:00

Kconfig

Merge branch 'stable/for-linus-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb

2021-09-03 10:34:44 -07:00

Makefile

Merge tag 'dma-mapping-5.11' of git://git.infradead.org/users/hch/dma-mapping

2020-12-22 13:19:43 -08:00

map_benchmark.c

dma-mapping: benchmark: Add support for multi-pages map/unmap

2021-04-02 16:41:08 +02:00

mapping.c

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2021-11-01 16:33:53 -07:00

ops_helpers.c

dma-mapping: handle vmalloc addresses in dma_common_{mmap,get_sgtable}

2021-07-16 11:30:26 +02:00

pool.c

dma/pool: create dma atomic pool only if dma zone has managed pages

2022-01-15 16:30:29 +02:00

remap.c

kernel/dma: remove unnecessary unmap_kernel_range

2021-04-30 11:20:40 -07:00

swiotlb.c

swiotlb: do not zero buffer in set_memory_decrypted()

2022-01-26 17:05:54 +01:00