Andrey Ryabinin d17a1d97dc x86/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/20171103185147.2688-2-pasha.tatashin@oracle.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.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>
Cc: Will Deacon <will.deacon@arm.com>
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

..

boot

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-11-13 16:58:05 -08:00

configs

x86/unwind: Rename unwinder config options to 'CONFIG_UNWINDER_*'

2017-10-14 10:12:12 +02:00

crypto

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2017-11-14 10:52:09 -08:00

entry

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-11-13 16:58:05 -08:00

events

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-11-13 16:58:05 -08:00

hyperv

x86/virt: Add enum for hypervisors to replace x86_hyper

2017-11-10 10:03:12 +01:00

ia32

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

include

kmemcheck: rip it out

2017-11-15 18:21:05 -08:00

kernel

kmemcheck: rip it out

2017-11-15 18:21:05 -08:00

kvm

Merge branch 'linus' into locking/core, to resolve conflicts

2017-11-07 10:32:44 +01:00

lib

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-11-13 14:13:48 -08:00

math-emu

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mm

x86/mm/kasan: don't use vmemmap_populate() to initialize shadow

2017-11-15 18:21:05 -08:00

net

bpf: fix bpf_tail_call() x64 JIT

2017-10-03 16:04:44 -07:00

oprofile

x86/oprofile/ppro: Do not use __this_cpu*() in preemptible context

2017-11-08 13:01:54 +01:00

pci

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

platform

kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK

2017-11-15 18:21:04 -08:00

power

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

purgatory

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ras

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

realmode

x86/realmode: Don't decrypt trampoline area under SEV

2017-11-07 15:35:55 +01:00

tools

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

um

Merge branch 'linus' into x86/asm, to pick up fixes and resolve conflicts

2017-11-07 10:53:06 +01:00

video

…

xen

Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-11-13 18:29:23 -08:00

.gitignore

…

Kbuild

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-09-07 09:25:15 -07:00

Kconfig

x86/mm/kasan: don't use vmemmap_populate() to initialize shadow

2017-11-15 18:21:05 -08:00

Kconfig.cpu

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig.debug

Merge branch 'linus' into x86/asm, to pick up fixes and resolve conflicts

2017-11-07 10:53:06 +01:00

Makefile

kmemcheck: remove annotations

2017-11-15 18:21:04 -08:00

Makefile_32.cpu

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Makefile.um

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00