From patchwork Sun Jun 18 00:08:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mingwei Zhang X-Patchwork-Id: 109561 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp2218974vqr; Sat, 17 Jun 2023 17:11:13 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ7NKWYrLFjOc4ChydYc2kyQV9XF2+U3mXgXcD/vavEq1QBuA3Ckhgb27+wJDYQhayKDqnBQ X-Received: by 2002:a05:6a00:1a56:b0:65b:38b2:8d4b with SMTP id h22-20020a056a001a5600b0065b38b28d4bmr8328127pfv.29.1687047073088; Sat, 17 Jun 2023 17:11:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1687047073; cv=none; d=google.com; s=arc-20160816; b=dmpPcsq8l4CLOWHW/QF2hlSc1ANqwu9LnaphbMtOwsnQfmpGRNT2jBSMC5xbSTBP/m YimnMF3WGlGMhAG7JpAyU3Piv3RBv1ezL6Z0RiQwWy+DIhjEiWNceyBPPw3Aj43HLE+2 neHVKbI9V5SIZCdMw8GJtQqbFrCY78NQtHAlgZ+ZPTN7RfUYL5FOLxnPAIzLQVgnX7Oj 3sO6UND4MiCLTNR4E0Qd4Sq5gMVGimDa8eIJS5wMQ3WOEilV+czyBd0sNXul1EDSjSMK F6Q3V+5twh4vauiBM2ihwGVouXVwCzcgKV4mfmvSbAGKQbPljOCNrkSqmbW/UBpTry3L bgtg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:reply-to:dkim-signature; bh=SWUWH2lvAYfFJm9Hx/6bdaK1OOQ3GRc/IjgAVTyvQ3A=; b=FovgdbcmPg0Nr9Mo93G8+ajEtp6+OwsyJq4DXpxj6rWN0u1ftkI3hIA5nWFFkI3fr6 CAx6IGaxVrKlkJIiBv9yexhknfNDdoXFWbVqcY0/zmM4m5uMkg/m1rRhZnRD1e+WR/5J 8lCm2TCNuPvC+VivDQgcqievgaUVyCiyBl8HnHbNQYv2u/fj9ihXXt7/xjJubBWRjwka AE5O8Y0VUGdj6J5UIx2pUCICrsDIbtxdMNePRZdBVAZgsR1mLnlXh6jkWZDKa+okO3aV QO4P3ZwrJ/G3lsnk9R52k/hsKOFPorCXXS6vsfqf3HYt/wJRDIO730iH8AMa/Abt/CBP 7vUQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20221208 header.b=30sbRvHS; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id c80-20020a621c53000000b00668718e54c6si733392pfc.202.2023.06.17.17.10.59; Sat, 17 Jun 2023 17:11:13 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20221208 header.b=30sbRvHS; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233473AbjFRAJX (ORCPT + 99 others); Sat, 17 Jun 2023 20:09:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38222 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232271AbjFRAJT (ORCPT ); Sat, 17 Jun 2023 20:09:19 -0400 Received: from mail-pf1-x44a.google.com (mail-pf1-x44a.google.com [IPv6:2607:f8b0:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0496170E for ; Sat, 17 Jun 2023 17:09:17 -0700 (PDT) Received: by mail-pf1-x44a.google.com with SMTP id d2e1a72fcca58-666ecb21fb8so1228893b3a.1 for ; Sat, 17 Jun 2023 17:09:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1687046957; x=1689638957; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=SWUWH2lvAYfFJm9Hx/6bdaK1OOQ3GRc/IjgAVTyvQ3A=; b=30sbRvHSEui1YuUerrYqr2XHk9jphndeiTUEpOhR4E/MjyMQ1vFoouVxAiTi+cWC2b z68RRVMYzKkyMcAJOFe9blpf8xgZ8aCKYV/bLeBkqCGnAYyF+I2DklMOG9N1+BvZnfdu wfyveTLvxnSK7i5/yPlXLgYGxmgdAxy6dmsWfAy3EwaEkNPHPb39w1nH1Vs6X+W0iXFC BQ7C5nEuqvgBVkKP7Sfb/2gv7rR5lbOsr+lTA9UnW0phq1AzQFgGDzruoKEnJsqowt8e v80Te8LKsZJf0Fvy4Y4zuIkUzFA+UHI/AsSBvfilqKtD4FLzAZAWaSxbeOOFjebG9hn/ PdVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687046957; x=1689638957; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=SWUWH2lvAYfFJm9Hx/6bdaK1OOQ3GRc/IjgAVTyvQ3A=; b=jhb8Uj1x9jNWRnVR1FYg6g3R0FD/vL4aQUX5K2bYD/FZUfK3HjaUzQ9e1J2FuciDSD 4XlYuyGZvLPydtnk4ta8rnZx/cCHY25GMlPKe3ZzdLFQ4twA/PptMxOWCl7o9bZBs1Yg CbLRGQsz0u5zN8WkYded6oYCTlixmrXL9nXUHcop6K/hX1PSMWhKdZ4c+xr3tSgLNCmC izl7d0nUb6HSSVJ2UDlIGcyp0FdZ+O4vsHWCNYN7oKI74dP1OSLDmFiulDNUUyuE7hJY eTM3ti88SldWFgE36yc7CwCXBijfCCM5/Jwgmi0aXn4rwHBwnVzgrPckjh7M7XVdgaBI HYKg== X-Gm-Message-State: AC+VfDwNb0wyU5dYZwSOkXdH8HvUGj98qjwyATnhqlnkkOzPsQ7J2oLM ggPnD8DuvI2gtuCtmJkrsu/lO+Gex74M X-Received: from mizhang-super.c.googlers.com ([34.105.13.176]) (user=mizhang job=sendgmr) by 2002:a05:6a00:1789:b0:643:a542:b311 with SMTP id s9-20020a056a00178900b00643a542b311mr1764182pfg.0.1687046957241; Sat, 17 Jun 2023 17:09:17 -0700 (PDT) Reply-To: Mingwei Zhang Date: Sun, 18 Jun 2023 00:08:53 +0000 In-Reply-To: <20230618000856.1714902-1-mizhang@google.com> Mime-Version: 1.0 References: <20230618000856.1714902-1-mizhang@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Message-ID: <20230618000856.1714902-4-mizhang@google.com> Subject: [PATCH 3/6] KVM: Documentation: Add the missing ptep in kvm_mmu_page From: Mingwei Zhang To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Mingwei Zhang , Jim Mattson , David Matlack , Ben Gardon X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1768997071819599048?= X-GMAIL-MSGID: =?utf-8?q?1768997071819599048?= Add the missing ptep in kvm_mmu_page description. ptep is used when TDP MMU is enabled and it shares the storage with parent_ptes. Update the doc to help readers to get up-to-date info. Signed-off-by: Mingwei Zhang --- Documentation/virt/kvm/x86/mmu.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/virt/kvm/x86/mmu.rst b/Documentation/virt/kvm/x86/mmu.rst index 149dd3cba48f..36bfe0fe02bb 100644 --- a/Documentation/virt/kvm/x86/mmu.rst +++ b/Documentation/virt/kvm/x86/mmu.rst @@ -236,6 +236,10 @@ Shadow pages contain the following information: parent_ptes points at this single spte, otherwise, there exists multiple sptes pointing at this page and (parent_ptes & ~0x1) points at a data structure with a list of parent sptes. + ptep: + Pointer to the parent spte when TDP MMU is enabled. In TDP MMU, each + shadow page will have at most one parent. Note that this field is a + union with parent_ptes. unsync: If true, then the translations in this page may not match the guest's translation. This is equivalent to the state of the tlb when a pte is