arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives
authorWill Deacon <will.deacon@arm.com>
Tue, 3 Apr 2018 11:09:23 +0000 (12:09 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 8 Apr 2018 10:12:56 +0000 (12:12 +0200)
commit574e44dc36676a13af084a9d5f42cc71a59b8066
tree44befdc9936e68b39de31d121b9d0c2e61a4daf2
parenta80d8e2979f32113df09b844d5e12e771162db40
arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives

commit 439e70e27a51 upstream.

The identity map is mapped as both writeable and executable by the
SWAPPER_MM_MMUFLAGS and this is relied upon by the kpti code to manage
a synchronisation flag. Update the .pushsection flags to reflect the
actual mapping attributes.

Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Alex Shi <alex.shi@linaro.org> [v4.9 backport]
Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport]
Tested-by: Will Deacon <will.deacon@arm.com>
Tested-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/arm64/kernel/cpu-reset.S
arch/arm64/kernel/head.S
arch/arm64/kernel/sleep.S
arch/arm64/mm/proc.S