From dee3b246017c98b2ef932d2732fb0da03c4bd9d8 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Thu, 10 Aug 2017 13:04:48 +0100 Subject: [PATCH] UPSTREAM: arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN 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 Tested-by: Laura Abbott Tested-by: Shanker Donthineni Signed-off-by: Will Deacon (cherry picked from commit 376133b7edc20f237a42e4c72415cc9e8c0a9704) Signed-off-by: Todd Poynor Change-Id: Iac0d096cd8eda5bc2d3cd17d7d2492d1838ad8ed Signed-off-by: Greg Kroah-Hartman --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index fbf07a6bd8a4..55578aeccff7 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -802,6 +802,7 @@ 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