From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guo Ren Subject: [PATCH] riscv: Use flush_icache_mm for flush_icache_user_range Date: Sat, 25 Jan 2020 00:18:10 +0800 Message-ID: <20200124161810.24322-1-guoren@linux.alibaba.com> Return-path: Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]:60343 "EHLO out30-43.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387404AbgAXQSX (ORCPT ); Fri, 24 Jan 2020 11:18:23 -0500 Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-riscv@lists.infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, Guo Ren , Andrew Waterman , Palmer Dabbelt The only call path is: __access_remote_vm -> copy_to_user_page -> flush_icache_user_range Seems it's ok to use flush_icache_mm instead of flush_icache_all and it could reduce flush_icache_all called on other harts. I think the patch is the fixup for the commit 08f051eda33b. Signed-off-by: Guo Ren Cc: Andrew Waterman Cc: Palmer Dabbelt --- arch/riscv/include/asm/cacheflush.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h index b69aecbb36d3..26589623fd57 100644 --- a/arch/riscv/include/asm/cacheflush.h +++ b/arch/riscv/include/asm/cacheflush.h @@ -85,7 +85,7 @@ static inline void flush_dcache_page(struct page *page) * so instead we just flush the whole thing. */ #define flush_icache_range(start, end) flush_icache_all() -#define flush_icache_user_range(vma, pg, addr, len) flush_icache_all() +#define flush_icache_user_range(vma, pg, addr, len) flush_icache_mm(vma->vm_mm, 0) void dma_wbinv_range(unsigned long start, unsigned long end); void dma_wb_range(unsigned long start, unsigned long end); -- 2.17.0