FROMLIST: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros
authorCatalin Marinas <catalin.marinas@arm.com>
Fri, 1 Jul 2016 13:58:21 +0000 (14:58 +0100)
committerSami Tolvanen <samitolvanen@google.com>
Thu, 29 Sep 2016 17:52:56 +0000 (10:52 -0700)
commit23368b642deb01ac6ce668ec1dedfcc0cab25c71
treecfd149ddb906f10eaac9525473e97593a2e19343
parentd907eb252977469ed9bded38bd76c2212065c2cf
FROMLIST: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros

This patch moves the directly coded alternatives for turning PAN on/off
into separate uaccess_{enable,disable} macros or functions. The asm
macros take a few arguments which will be used in subsequent patches.

Note that any (unlikely) access that the compiler might generate between
uaccess_enable() and uaccess_disable(), other than those explicitly
specified by the user access code, will not be protected by PAN.

Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Change-Id: Ic3fddd706400c8798f57456c56361d84d234f6ef
(cherry picked from commit a4820644c627b82cbc865f2425bb788c94743b16)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
arch/arm64/include/asm/futex.h
arch/arm64/include/asm/uaccess.h
arch/arm64/kernel/armv8_deprecated.c
arch/arm64/lib/clear_user.S
arch/arm64/lib/copy_from_user.S
arch/arm64/lib/copy_in_user.S
arch/arm64/lib/copy_to_user.S