Re: [PATCH v8 30/43] arm64: kasan: Allow enabling in-kernel MTE
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2020-11-05 17:25:59
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linux-mm, lkml
On Thu, Nov 05, 2020 at 12:18:45AM +0100, Andrey Konovalov wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 06ba6c923ab7..fcfbefcc3174 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c@@ -121,6 +121,13 @@ void *mte_set_mem_tag_range(void *addr, size_t size, u8 tag) return ptr; } +void __init mte_init_tags(u64 max_tag) +{ + /* Enable MTE Sync Mode for EL1. */ + sysreg_clear_set(sctlr_el1, SCTLR_ELx_TCF_MASK, SCTLR_ELx_TCF_SYNC); + isb(); +}
Is this going to be called on each CPU? I quickly went through the rest of the patches and couldn't see how. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel