4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Will Deacon <will.dea...@arm.com>
Commit 376133b7edc2 upstream.
We're about to rework the way ASIDs are allocated, switch_mm is
implemented and low-level kernel entry/exit is handled, so keep the
ARM64_SW_TTBR0_PAN code out of the way whilst we do the heavy lifting.
It will be re-enabled in a subsequent patch.
Reviewed-by: Mark Rutland <mark.rutl...@arm.com>
Tested-by: Laura Abbott <labb...@redhat.com>
Tested-by: Shanker Donthineni <shank...@codeaurora.org>
Signed-off-by: Will Deacon <will.dea...@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -882,6 +882,7 @@ endif
config ARM64_SW_TTBR0_PAN
bool "Emulate Privileged Access Never using TTBR0_EL1 switching"
+ depends on BROKEN # Temporary while switch_mm is reworked
help
Enabling this option prevents the kernel from accessing
user-space memory directly by pointing TTBR0_EL1 to a reserved
