From patchwork Fri May 15 04:10:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: bibo mao X-Patchwork-Id: 11550391 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 2BB6F59D for ; Fri, 15 May 2020 04:10:30 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F2A2D206DA for ; Fri, 15 May 2020 04:10:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F2A2D206DA 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 68DCF8E0005; Fri, 15 May 2020 00:10:27 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 614E390000D; Fri, 15 May 2020 00:10:27 -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 5050B8E0008; Fri, 15 May 2020 00:10:27 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0072.hostedemail.com [216.40.44.72]) by kanga.kvack.org (Postfix) with ESMTP id 391158E0005 for ; Fri, 15 May 2020 00:10:27 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id EE6E7181AC9CB for ; Fri, 15 May 2020 04:10:26 +0000 (UTC) X-FDA: 76817626452.17.ghost65_7822a5b28a23a X-Spam-Summary: 2,0,0,ae9a78d0d0d7a874,d41d8cd98f00b204,maobibo@loongson.cn,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1345:1437:1534:1541:1711:1730:1747:1777:1792:2393:2559:2562:2895:2897:3138:3139:3140:3141:3142:3352:3865:3867:3868:3870:3871:3872:4250:4321:5007:6119:6120:6261:7875:7901:7903:10004:11026:11232:11657:11658:11914:12043:12048:12160:12297:12438:12555:12895:12986:13069:13311:13357:14096:14181:14384:14394:14721:14777:21080:21433:21451:21627:21990:30003:30054:30070,0,RBL:114.242.206.163:@loongson.cn:.lbl8.mailshell.net-64.201.201.201 62.14.2.100,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: ghost65_7822a5b28a23a X-Filterd-Recvd-Size: 3480 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by imf11.hostedemail.com (Postfix) with ESMTP for ; Fri, 15 May 2020 04:10:25 +0000 (UTC) Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9DxT98hFr5eHPU0AA--.1S2; Fri, 15 May 2020 12:10:09 +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 Subject: [PATCH 1/3] MIPS: Do not flush tlb page when updating PTE entry Date: Fri, 15 May 2020 12:10:07 +0800 Message-Id: <1589515809-32422-1-git-send-email-maobibo@loongson.cn> X-Mailer: git-send-email 1.8.3.1 X-CM-TRANSID: AQAAf9DxT98hFr5eHPU0AA--.1S2 X-Coremail-Antispam: 1UD129KBjvdXoWruw1xtr4DAFW5ZFykCFWxZwb_yoWDWrc_C3 WxZanYg3y0grsrCrW7Aws3GryY9a1kG34DXr1xW3s0ya45Ar4kGayvvFsrXr4Y9Fyvkrs5 CrZYkw1akFnFqjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbs8YjsxI4VWDJwAYFVCjjxCrM7AC8VAFwI0_Gr0_Xr1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM2 8CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0 cI8IcVCY1x0267AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I 8E87Iv6xkF7I0E14v26F4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC 0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr 1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4IIrI8v6xkF7I0E8cxan2IY 04v7MxkIecxEwVCm-wCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s 026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_ GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20x vEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280 aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43 ZEXa7IU8489tUUUUU== X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ 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. --- Change in v2: - split flush_tlb_fix_spurious_fault and tlb update into two patches - comments typo modification Signed-off-by: Bibo Mao --- arch/mips/include/asm/pgtable.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index aab0ec1..e215542 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -454,6 +454,8 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot) return __pgprot(prot); } +#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) + /* * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to.