From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4824AC3A5A2 for ; Tue, 3 Sep 2019 09:33:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 19BD122D6D for ; Tue, 3 Sep 2019 09:33:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="NENubW1I" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728667AbfICJdB (ORCPT ); Tue, 3 Sep 2019 05:33:01 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:56696 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728639AbfICJc7 (ORCPT ); Tue, 3 Sep 2019 05:32:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=aGZ6eex/vaDo70w5kZ45TaxrzZcYzCY8A7OTiCg28DE=; b=NENubW1Ioc/COXHzQNyWXTUqdG 73452rzNbGHa7VDsPV89qoHAkezQsz9tKERa5sWaGqQjmHdQCR9+LCRD7lkdOVPuKdrAhoIbaBGD4 rMlAc88Mhimn9snapkJUza42rdSqdg081e5Fq769wwsazeVu3QJxLIdnoavR+rARFIfJ6j8ff9w4g +chgCUukgF5YnTroUzpzJ5nr3g+DAvl+VH619i9jULHtcdgc8bQPeT/kkP7K25TLyQS4LyQFIZy4z RZRcpDm+gOhnVY8jz7/kRaowqkXft4TDhcM9gHzQ7D9/aE0+IFU53oKVwgk6y7yH3210SRToye62y HbH+D+Yg==; Received: from clnet-p19-102.ikbnet.co.at ([83.175.77.102] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1i55BJ-0004UW-Fe; Tue, 03 Sep 2019 09:32:58 +0000 From: Christoph Hellwig To: Palmer Dabbelt , Paul Walmsley Cc: Damien Le Moal , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Atish Patra Subject: [PATCH 07/20] riscv: move the TLB flush logic out of line Date: Tue, 3 Sep 2019 11:32:26 +0200 Message-Id: <20190903093239.21278-8-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190903093239.21278-1-hch@lst.de> References: <20190903093239.21278-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The TLB flush logic is going to become more complex. Start moving it out of line. Signed-off-by: Christoph Hellwig Reviewed-by: Atish Patra --- arch/riscv/include/asm/tlbflush.h | 37 ++++++------------------------- arch/riscv/mm/Makefile | 3 +++ arch/riscv/mm/tlbflush.c | 35 +++++++++++++++++++++++++++++ 3 files changed, 45 insertions(+), 30 deletions(-) create mode 100644 arch/riscv/mm/tlbflush.c diff --git a/arch/riscv/include/asm/tlbflush.h b/arch/riscv/include/asm/tlbflush.h index df31fe2ed09c..075a784c66c5 100644 --- a/arch/riscv/include/asm/tlbflush.h +++ b/arch/riscv/include/asm/tlbflush.h @@ -25,8 +25,13 @@ static inline void local_flush_tlb_page(unsigned long addr) __asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory"); } -#ifndef CONFIG_SMP - +#ifdef CONFIG_SMP +void flush_tlb_all(void); +void flush_tlb_mm(struct mm_struct *mm); +void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); +void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end); +#else /* CONFIG_SMP */ #define flush_tlb_all() local_flush_tlb_all() #define flush_tlb_page(vma, addr) local_flush_tlb_page(addr) @@ -37,34 +42,6 @@ static inline void flush_tlb_range(struct vm_area_struct *vma, } #define flush_tlb_mm(mm) flush_tlb_all() - -#else /* CONFIG_SMP */ - -#include - -static inline void remote_sfence_vma(struct cpumask *cmask, unsigned long start, - unsigned long size) -{ - struct cpumask hmask; - - riscv_cpuid_to_hartid_mask(cmask, &hmask); - sbi_remote_sfence_vma(hmask.bits, start, size); -} - -#define flush_tlb_all() sbi_remote_sfence_vma(NULL, 0, -1) - -#define flush_tlb_range(vma, start, end) \ - remote_sfence_vma(mm_cpumask((vma)->vm_mm), start, (end) - (start)) - -static inline void flush_tlb_page(struct vm_area_struct *vma, - unsigned long addr) -{ - flush_tlb_range(vma, addr, addr + PAGE_SIZE); -} - -#define flush_tlb_mm(mm) \ - remote_sfence_vma(mm_cpumask(mm), 0, -1) - #endif /* CONFIG_SMP */ /* Flush a range of kernel pages */ diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile index 74055e1d6f21..9d9a17335686 100644 --- a/arch/riscv/mm/Makefile +++ b/arch/riscv/mm/Makefile @@ -13,4 +13,7 @@ obj-y += cacheflush.o obj-y += context.o obj-y += sifive_l2_cache.o +ifeq ($(CONFIG_MMU),y) +obj-$(CONFIG_SMP) += tlbflush.o +endif obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c new file mode 100644 index 000000000000..df93b26f1b9d --- /dev/null +++ b/arch/riscv/mm/tlbflush.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include + +void flush_tlb_all(void) +{ + sbi_remote_sfence_vma(NULL, 0, -1); +} + +static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start, + unsigned long size) +{ + struct cpumask hmask; + + riscv_cpuid_to_hartid_mask(cmask, &hmask); + sbi_remote_sfence_vma(hmask.bits, start, size); +} + +void flush_tlb_mm(struct mm_struct *mm) +{ + __sbi_tlb_flush_range(mm_cpumask(mm), 0, -1); +} + +void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) +{ + __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), addr, PAGE_SIZE); +} + +void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), start, end - start); +} -- 2.20.1