From 8e63d38876691756f9bc6930850f1fb77809be1b Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 6 Oct 2015 18:46:23 +0100 Subject: arm64: flush: use local TLB and I-cache invalidation There are a number of places where a single CPU is running with a private page-table and we need to perform maintenance on the TLB and I-cache in order to ensure correctness, but do not require the operation to be broadcast to other CPUs. This patch adds local variants of tlb_flush_all and __flush_icache_all to support these use-cases and updates the callers respectively. __local_flush_icache_all also implies an isb, since it is intended to be used synchronously. Reviewed-by: Catalin Marinas Acked-by: David Daney Acked-by: Ard Biesheuvel Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas --- arch/arm64/include/asm/cacheflush.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/arm64/include/asm/cacheflush.h') diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index c75b8d027eb1..54efedaf331f 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -115,6 +115,13 @@ extern void copy_to_user_page(struct vm_area_struct *, struct page *, #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 extern void flush_dcache_page(struct page *); +static inline void __local_flush_icache_all(void) +{ + asm("ic iallu"); + dsb(nsh); + isb(); +} + static inline void __flush_icache_all(void) { asm("ic ialluis"); -- cgit v1.2.3