linux/arch/arm64/mm
Will Deacon 32d6397805 arm64: mm: ensure that the zero page is visible to the page table walker
In paging_init, we allocate the zero page, memset it to zero and then
point TTBR0 to it in order to avoid speculative fetches through the
identity mapping.

In order to guarantee that the freshly zeroed page is indeed visible to
the page table walker, we need to execute a dsb instruction prior to
writing the TTBR.

Cc: <stable@vger.kernel.org> # v3.14+, for older kernels need to drop the 'ishst'
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-12-11 17:33:22 +00:00
..
cache.S arm64: use ENDPIPROC() to annotate position independent assembler routines 2015-10-12 16:19:45 +01:00
context.c arm64: mm: keep reserved ASIDs in sync with mm after multiple rollovers 2015-11-26 15:27:10 +00:00
copypage.c arm64: export __cpu_{clear,copy}_user_page functions 2014-07-08 17:30:51 +01:00
dma-mapping.c arm64: add __init/__initdata section marker to some functions/variables 2015-12-02 12:17:11 +00:00
dump.c arm64: Make the kernel page dump utility aware of the CONT bit 2015-10-08 18:39:57 +01:00
extable.c arm64: MMU fault handling and page table management 2012-09-17 13:41:57 +01:00
fault.c arm64: mm: fix fault_info table xFSC decoding 2015-11-25 15:49:16 +00:00
flush.c arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
hugetlbpage.c arm64: hugetlb: remove paragraph about writing to FSF 2015-07-27 11:08:40 +01:00
init.c arm64: mm: fold alternatives into .init 2015-12-10 17:36:08 +00:00
ioremap.c arm64: add ioremap physical address information 2015-01-23 15:29:06 +00:00
kasan_init.c arm64: kasan: fix issues reported by sparse 2015-10-13 14:54:42 +01:00
Makefile arm64: add KASAN support 2015-10-12 17:46:36 +01:00
mm.h arm64: add better page protections to arm64 2015-01-22 14:54:29 +00:00
mmap.c mm: expose arch_mmap_rnd when available 2015-04-14 16:49:05 -07:00
mmu.c arm64: mm: ensure that the zero page is visible to the page table walker 2015-12-11 17:33:22 +00:00
pageattr.c arm64/mm: use PAGE_ALIGNED instead of IS_ALIGNED 2015-10-28 18:36:32 +00:00
pgd.c arm64: move PGD_SIZE definition to pgalloc.h 2015-10-12 17:46:30 +01:00
proc-macros.S arm64: mm: increase VA range of identity map 2015-03-23 11:35:29 +00:00
proc.S arm64: mm: place __cpu_setup in .text 2015-12-11 17:33:21 +00:00