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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DC21C4332F for ; Mon, 12 Dec 2022 15:31:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231766AbiLLPbE (ORCPT ); Mon, 12 Dec 2022 10:31:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231715AbiLLPbB (ORCPT ); Mon, 12 Dec 2022 10:31:01 -0500 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E5CBDF6D for ; Mon, 12 Dec 2022 07:31:00 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id fy4so173568pjb.0 for ; Mon, 12 Dec 2022 07:31:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=dswdc8a03OJ4PZCgPN86bzdDFhJyMWhC2nUfUROyko4=; b=kp+Ud8kOL2ExTdDIV+vpnRU2GZmmaCyk8O8bZFjjCdE7XizYCdqVUmGe7P9qUrnyDT LH86TfsdXK/rIPvw621tAv2HRyzc7TTIUGXG3lahls2Kj4nwh28KG0EOOIRLpad5+17/ 8e5KctNEjiB8yYWe70pjyZoaD7lBMGFPR5N7FPThkB/cKRc14SwySSE1Bb6ctTAqZn+h skOlKGWeqhkGOprcicltuqF5qCDip2NlK4ny64rwzY+75VIkSSY3kXEnc8f4Rqqr/A55 RJIPuk7whAVJ13JJCLuJJ1tPEi+K8Rb3Blq+TMo5IYoHW7gWJQKLcffcOlSFZWYr8JRm FCmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=dswdc8a03OJ4PZCgPN86bzdDFhJyMWhC2nUfUROyko4=; b=Ip0UFjM2HpyHX7yJIU8aBwFMUy5Mjf4tVLph0uKEY16SoDIXtmWzIB152hjOnT234N PdSn/BwO9fhns5RTc0bMbl0FOmWYjPXmvSTORONBdOhfCBOii773yqJ+KZv+HPaozA62 ep5fa5MRAI9pcFlRSUkIxcGmO2QGw7sH/9xLFXlAhbNiMOHQPYHniF7+WZscte9tNhOm bJDp7eRb9wYmogrTSYGFoVVzH881A5Y9w3usShVOOnx9xKdAfIXQDbIuTEGUofW3AANT 0fCzyJqD7kKuQIvgyuR6cHjDaqmp5SUkwZ98zlxwNId9VVhQoyGhSQTMERycOdlXpzAG zqNQ== X-Gm-Message-State: ANoB5pklr3PSCgaijGF4Xtr51Ue91wPAavJU82eCeajdpBnHkRp8UR5O lJ1QjvNmWOs8NNhmmFRP1Bi5V0ZKCKM= X-Google-Smtp-Source: AA0mqf4yNzNb+4DeaQhEYS2FVfrbpYQtwabRMD9CrjKWUvg5GkRjG5fC3vMaKLy+vnnFGLqqUb3RVA== X-Received: by 2002:a17:903:24b:b0:189:62fd:140e with SMTP id j11-20020a170903024b00b0018962fd140emr17961798plh.29.1670859059606; Mon, 12 Dec 2022 07:30:59 -0800 (PST) Received: from localhost ([47.88.5.130]) by smtp.gmail.com with ESMTPSA id p8-20020a1709027ec800b001893a002107sm6538031plb.0.2022.12.12.07.30.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Dec 2022 07:30:59 -0800 (PST) From: Lai Jiangshan To: linux-kernel@vger.kernel.org Cc: Paolo Bonzini , Sean Christopherson , Lai Jiangshan Subject: [PATCH 0/2] kvm: x86/mmu: Skip adding write-access for spte in FNAME(sync_page) and remove shadow_host_writable_mask Date: Mon, 12 Dec 2022 23:32:03 +0800 Message-Id: <20221212153205.3360-1-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lai Jiangshan shadow_host_writable_mask is used only in FNAME(sync_page) for adding write-access for spte which can be added in later page fault. Skip adding it and save a bit from spte. Lai Jiangshan (2): kvm: x86/mmu: Reduce the update to the spte in FNAME(sync_page) kvm: x86/mmu: Remove useless shadow_host_writable_mask arch/x86/kvm/mmu/paging_tmpl.h | 26 +++++++++++++++++++++-- arch/x86/kvm/mmu/spte.c | 8 +------ arch/x86/kvm/mmu/spte.h | 38 +++++++++++----------------------- 3 files changed, 37 insertions(+), 35 deletions(-) -- 2.19.1.6.gb485710b