From patchwork Wed May 27 02:25:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: bibo mao X-Patchwork-Id: 11571655 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5A24F166C for ; Wed, 27 May 2020 02:25:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3113E207CB for ; Wed, 27 May 2020 02:25:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3113E207CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3E7EA800B7; Tue, 26 May 2020 22:25:41 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 3713080010; Tue, 26 May 2020 22:25:41 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 26079800B6; Tue, 26 May 2020 22:25:41 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0214.hostedemail.com [216.40.44.214]) by kanga.kvack.org (Postfix) with ESMTP id 0C7BB80010 for ; Tue, 26 May 2020 22:25:41 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id BE4802C84 for ; Wed, 27 May 2020 02:25:40 +0000 (UTC) X-FDA: 76860908040.07.veil18_121822a26d4e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin07.hostedemail.com (Postfix) with ESMTP id 9CA221803FFD1 for ; Wed, 27 May 2020 02:25:40 +0000 (UTC) X-Spam-Summary: 2,0,0,8052be06cb751c7a,d41d8cd98f00b204,maobibo@loongson.cn,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1345:1359:1437:1534:1540:1711:1730:1747:1777:1792:2393:2559:2562:2897:3138:3139:3140:3141:3142:3352:3865:3867:3868:3871:3872:4250:5007:6119:6120:6261:7901:7903:10004:11026:11657:11658:11914:12043:12048:12160:12297:12438:12555:12895:13069:13311:13357:14096:14181:14384:14394:14721:14777:21080:21433:21451:21627:21990:30003:30054,0,RBL:114.242.206.163:@loongson.cn:.lbl8.mailshell.net-64.100.201.201 62.2.2.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: veil18_121822a26d4e X-Filterd-Recvd-Size: 3660 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by imf06.hostedemail.com (Postfix) with ESMTP for ; Wed, 27 May 2020 02:25:38 +0000 (UTC) Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxr2uQz81e3nc5AA--.351S3; Wed, 27 May 2020 10:25:20 +0800 (CST) From: Bibo Mao To: Thomas Bogendoerfer , Jiaxun Yang , Huacai Chen , Andrew Morton , Paul Burton , Dmitry Korotin , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Stafford Horne , Steven Price , Anshuman Khandual Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Rapoport , Sergei Shtylyov , "Maciej W. Rozycki" , linux-mm@kvack.org, David Hildenbrand Subject: [PATCH v7 1/4] MIPS: Do not flush tlb page when updating PTE entry Date: Wed, 27 May 2020 10:25:17 +0800 Message-Id: <1590546320-21814-2-git-send-email-maobibo@loongson.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1590546320-21814-1-git-send-email-maobibo@loongson.cn> References: <1590546320-21814-1-git-send-email-maobibo@loongson.cn> X-CM-TRANSID: AQAAf9Dxr2uQz81e3nc5AA--.351S3 X-Coremail-Antispam: 1UD129KBjvdXoWruw1xtr4DAFW5ZFykZr1rtFb_yoWfurc_C3 WxXa1kWryFqrsrury7Jws3JryY9a1kGa4vvrn7W390ya4Yyw4DGayvvFsrJr45uFWvyr4k CrZ5Cr1akFs2gjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbqAYjsxI4VWDJwAYFVCjjxCrM7AC8VAFwI0_Wr0E3s1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l82xGYIkIc2x26280x7 IE14v26r18M28IrcIa0xkI8VCY1x0267AKxVW8JVW5JwA2ocxC64kIII0Yj41l84x0c7CE w4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6x kF7I0E14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv 6xkF7I0E14v26r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4 CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvj eVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACI402YVCY1x02628vn2kIc2xKxw CY02Avz4vE-syl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAq x4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6r W5MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxV WUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxU xs2-UUUUU X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Rspamd-Queue-Id: 9CA221803FFD1 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: It is not necessary to flush tlb page on all CPUs if suitable PTE entry exists already during page fault handling, just updating TLB is fine. Here redefine flush_tlb_fix_spurious_fault as empty on MIPS system. Signed-off-by: Bibo Mao --- arch/mips/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index 9b01d2d..f8f48fc 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -478,6 +478,11 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot) return __pgprot(prot); } +static inline void flush_tlb_fix_spurious_fault(struct vm_area_struct *vma, + unsigned long address) +{ +} + /* * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to.