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linux/arch/arm64/mm
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Will Deacon e17d8025f0 arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow 
The kasan shadow is currently mapped using vmemmap_populate() since that
provides a semi-convenient way to map pages into init_top_pgt.  However,
since that no longer zeroes the mapped pages, it is not suitable for
kasan, which requires zeroed shadow memory.

Add kasan_populate_shadow() interface and use it instead of
vmemmap_populate().  Besides, this allows us to take advantage of
gigantic pages and use them to populate the shadow, which should save us
some memory wasted on page tables and reduce TLB pressure.

Link: http://lkml.kernel.org/r/20171103185147.2688-3-pasha.tatashin@oracle.com
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Steven Sistare <steven.sistare@oracle.com>
Cc: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Bob Picco <bob.picco@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-15 18:21:05 -08:00
..
cache.S arm64: Implement pmem API support 2017-08-09 12:15:45 +01:00
context.c arm64: cache: Remove support for ASID-tagged VIVT I-caches 2017-03-20 16:16:57 +00:00
copypage.c arm64: Defer dcache flush in __cpu_copy_user_page 2015-12-17 11:07:13 +00:00
dma-mapping.c dma mapping : export caller to vmallocinfo 2017-10-04 13:43:00 +01:00
dump.c arm64: dump: Add checking for writable and exectuable pages 2016-11-07 18:15:04 +00:00
extable.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fault.c arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
flush.c arm64: fix pmem interface definition 2017-08-10 18:13:59 +01:00
hugetlbpage.c arm64: hugetlb: Cleanup setup_hugepagesz 2017-08-22 17:47:12 +01:00
init.c arm64: kdump: provide /proc/vmcore file 2017-04-05 18:31:38 +01:00
ioremap.c arm64: use is_vmalloc_addr 2017-02-09 13:47:56 +00:00
kasan_init.c arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow 2017-11-15 18:21:05 -08:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmap.c arm64/mmap: properly account for stack randomization in mmap_base 2017-07-12 16:26:03 -07:00
mmu.c arm64: mm: Remove arch_apei_flush_tlb_one() 2017-11-07 12:13:33 +01:00
numa.c arm64/numa: Drop duplicate message 2017-07-20 17:03:53 +01:00
pageattr.c arm64: use set_memory.h header 2017-05-08 17:15:13 -07:00
pgd.c arm64: mm: drop fixup_init() and mm.h 2016-09-06 19:09:38 +01:00
physaddr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
proc.S arm64: explicitly mask all exceptions 2017-11-02 15:55:40 +00:00
ptdump_debugfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00