Re: [PATCH 26/35] kasan, arm64: Enable TBI EL1
From: Andrey Konovalov <hidden>
Date: 2020-09-08 16:40:34
Also in:
linux-mm, lkml
On Thu, Aug 27, 2020 at 12:40 PM Catalin Marinas [off-list ref] wrote:
On Fri, Aug 14, 2020 at 07:27:08PM +0200, Andrey Konovalov wrote:quoted
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 152d74f2cc9c..6880ddaa5144 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S@@ -38,7 +38,7 @@ /* PTWs cacheable, inner/outer WBWA */ #define TCR_CACHE_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA -#ifdef CONFIG_KASAN_SW_TAGS +#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) #define TCR_KASAN_FLAGS TCR_TBI1 #else #define TCR_KASAN_FLAGS 0I prefer to turn TBI1 on only if MTE is present. So on top of the v8 user series, just do this in __cpu_setup.
Started working on this, but realized that I don't understand what exactly is suggested here. TCR_KASAN_FLAGS are used in __cpu_setup(), so this already happens in __cpu_setup(). Do you mean that TBI1 should be enabled when CONFIG_ARM64_MTE is enabled, but CONFIG_KASAN_HW_TAGS is disabled? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel