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65033574ad
linux/arch/arm64/mm
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Catalin Marinas 65033574ad arm64: swiotlb: Reduce the default size if no ZONE_DMA bouncing needed 
With CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC enabled, the arm64 kernel still
allocates the default SWIOTLB buffer (64MB) even if ZONE_DMA is disabled
or all the RAM fits into this zone. However, this potentially wastes a
non-negligible amount of memory on platforms with little RAM.

Reduce the SWIOTLB size to 1MB per 1GB of RAM if only needed for
kmalloc() buffer bouncing.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Ross Burton <ross.burton@arm.com>
Cc: Ross Burton <ross.burton@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
2023-10-13 16:10:39 +01:00
..
cache.S efi: arm64: enter with MMU and caches enabled 2023-01-24 11:51:08 +00:00
context.c arm64/mm: remove now-superfluous ISBs from TTBR writes 2023-06-15 17:47:54 +01:00
copypage.c arm64: Also reset KASAN tag if page is not PG_mte_tagged 2023-05-16 14:58:54 +01:00
dma-mapping.c Revert "Revert "arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()"" 2023-03-30 16:23:03 +01:00
extable.c arm64: extable: cleanup redundant extable type EX_TYPE_FIXUP 2022-06-28 12:11:47 +01:00
fault.c mm: drop per-VMA lock when returning VM_FAULT_RETRY or VM_FAULT_COMPLETED 2023-08-24 16:20:17 -07:00
fixmap.c arm64: mm: always map fixmap at page granularity 2023-04-11 18:55:28 +01:00
flush.c arm64: implement the new page table range API 2023-08-24 16:20:20 -07:00
hugetlbpage.c arm64: mm: use ptep_clear() instead of pte_clear() in clear_flush() 2023-08-24 16:20:27 -07:00
init.c arm64: swiotlb: Reduce the default size if no ZONE_DMA bouncing needed 2023-10-13 16:10:39 +01:00
ioremap.c arm64 : mm: add wrapper function ioremap_prot() 2023-08-18 10:12:36 -07:00
kasan_init.c arm64: kasan: remove !KASAN_VMALLOC remnants 2023-06-06 17:39:05 +01:00
Makefile arm64: mm: move fixmap code to its own file 2023-04-11 18:55:28 +01:00
mmap.c arm64/mm: move protection_map[] inside the platform 2022-07-17 17:14:37 -07:00
mmu.c arm64: convert various functions to use ptdescs 2023-08-21 13:37:55 -07:00
mteswap.c mm/swap: stop using page->private on tail pages for THP_SWAP 2023-08-24 16:20:28 -07:00
pageattr.c mm,kfence: decouple kfence from page granularity mapping judgement 2023-03-27 16:15:20 +01:00
pgd.c
physaddr.c arm64: Do not pass tagged addresses to __is_lm_address() 2021-02-02 17:44:47 +00:00
proc.S arm64/mm: Replace an open coding with ID_AA64MMFR1_EL1_HAFDBS_MASK 2023-07-27 11:01:46 +01:00
ptdump_debugfs.c arm64: Add __init section marker to some functions 2021-04-08 17:45:10 +01:00
ptdump.c arm64: add FIXADDR_TOT_{START,SIZE} 2023-04-11 18:55:28 +01:00
trans_pgd-asm.S arm64: kexec: configure EL2 vectors for kexec 2021-10-01 13:31:00 +01:00
trans_pgd.c Add x86 shadow stack support 2023-08-31 12:20:12 -07:00