Re: [PATCH v4 30/39] arm64: kasan: Enable TBI EL1
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2020-10-02 14:11:01
Also in:
linux-mm, lkml
On Fri, Oct 02, 2020 at 01:10:31AM +0200, Andrey Konovalov wrote:
quoted hunk ↗ jump to hunk
From: Vincenzo Frascino <vincenzo.frascino@arm.com> Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) that is built on top of the Top Byte Ignore (TBI) feature. Enable in-kernel TBI when CONFIG_KASAN_HW_TAGS is turned on by enabling the TCR_TBI1 bit in proc.S. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Co-developed-by: Andrey Konovalov <redacted> Signed-off-by: Andrey Konovalov <redacted> --- Change-Id: I91944903bc9c9c9044f0d50e74bcd6b9971d21ff --- arch/arm64/mm/proc.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 6c1a6621d769..7c3304fb15d9 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S@@ -46,7 +46,7 @@ #endif #ifdef CONFIG_KASAN_HW_TAGS -#define TCR_KASAN_HW_FLAGS SYS_TCR_EL1_TCMA1 +#define TCR_KASAN_HW_FLAGS SYS_TCR_EL1_TCMA1 | TCR_TBI1 #else #define TCR_KASAN_HW_FLAGS 0 #endif
Please merge this patch with the one one introducing TCR_KASAN_HW_FLAGS, no need to have both around. You can add my Reviewed-by on that one. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel