From: Will Deacon Date: Thu, 10 Aug 2017 12:04:48 +0000 (+0100) Subject: arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN X-Git-Tag: for-linus-20180210~68^2~70^2~18 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=376133b7edc20f237a42e4c72415cc9e8c0a9704;p=linux-block.git 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 --- diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a93339f5178f..7e7d7fd152c4 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -910,6 +910,7 @@ 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