Jungseung Lee 7276c3fbd3 ARM: 8494/1: mm: Enable PXN when running non-LPAE kernel on LPAE processor
[ Upstream commit ad84f56bf6d620fe6ed4d57ce6ec9945684d7f35 ]

The VMSA field of MMFR0 (bottom 4 bits) is incremented for each
added feature.  PXN is supported if the value is >= 4 and LPAE
is supported if it is >= 5.

In case a kernel with CONFIG_ARM_LPAE disabled is used on a
processor that supports LPAE, we can still use PXN in short
descriptors.  So check for >= 4 not == 4.

Signed-off-by: Jungseung Lee <js07.lee@samsung.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-04-03 06:23:20 +02:00
..
2019-02-20 10:13:22 +01:00
2016-09-24 10:07:43 +02:00
2019-03-23 08:44:36 +01:00