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[2620:137:e000::1:20]) by mx.google.com with ESMTP id c30-20020a056a00009e00b00646df7a783bsi4147671pfj.118.2023.06.17.17.13.08; Sat, 17 Jun 2023 17:13:23 -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="zAN4yl/y"; 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 S234580AbjFRAJa (ORCPT + 99 others); Sat, 17 Jun 2023 20:09:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229668AbjFRAJW (ORCPT ); Sat, 17 Jun 2023 20:09:22 -0400 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E1521715 for ; Sat, 17 Jun 2023 17:09:21 -0700 (PDT) Received: by mail-pj1-x1049.google.com with SMTP id 98e67ed59e1d1-25e89d51bf2so954846a91.0 for ; Sat, 17 Jun 2023 17:09:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1687046960; x=1689638960; 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=kxL2IQh8QsyzT6M8Esvdn0S5tsYGjEEcYbokMBIJOOA=; b=zAN4yl/yAf39StZnUGptrfSOQsv6LlI7o2HkFCAMqcoRQjjCgZ3r19ALi5wJn9JDPy u6bIXwRmOwOC838v8rtUVWtWyBTAhG48OwwangQhrI26phyUC36Mvw7FPmof3d4i8thI HskS9RE2wxly89AwCkzpOj3R7prtSydMxkqZ+ZJoQqCLhsVvoRJvCeU+kw56/h1Tq95V 7xTx0H2mqfVUQNCwvin9J+4qUr0oZUX9SHG46zY+WPcusQv2dEzJTLeI1M/Uezu0MucY L0UArTP0fH+mSE7lERHIcQo2OODhzgmX1Azw0C2c/LZKL+qteyd4lSCgMSMmgLFAuRQz TPMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687046960; x=1689638960; 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=kxL2IQh8QsyzT6M8Esvdn0S5tsYGjEEcYbokMBIJOOA=; b=e8V4GWiODzNCxvtIYfHozOaCNaSunfr9yFN6YT+EIOu59SkObewqDsR7vc81lzxdue 4hnTnUW86mbYRB0PFAJgRrKqTUVGtJ9Js/Tzy7R77jkCB5t/CdMyKMWvN9kkkdACuYkU Woil14VVURJ2yig/c7UTGO0BL30ztjdGYQPUpD+rlvBGqyzRcs1jgEie7iFz3ljungxv BgDJvojlzH2VDVcTsvwIoT2MayuXYXAkTUSIMBeGLuVktEpaHAlmzkic+OYQS9X50yl5 /XFbBCcNsOvrNzbd27cOKfykGwSJJNc43mn1JYITIoOj4UlK1iEm27xQDfP9w/SF9HKd lt2A== X-Gm-Message-State: AC+VfDwvTpihndxAD6OIIpZIOopQNPKsggGblthVZI+yMNMM7Dt97JO5 29cumViPryLj1sXFAjlrLcZWrPKR0Sgv X-Received: from mizhang-super.c.googlers.com ([35.247.89.60]) (user=mizhang job=sendgmr) by 2002:a05:6a00:1a15:b0:654:8eb9:4607 with SMTP id g21-20020a056a001a1500b006548eb94607mr1818385pfv.4.1687046960661; Sat, 17 Jun 2023 17:09:20 -0700 (PDT) Reply-To: Mingwei Zhang Date: Sun, 18 Jun 2023 00:08:55 +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: <20230618000856.1714902-6-mizhang@google.com> Subject: [PATCH 5/6] KVM: Documentation: Add the missing mmu_valid_gen into 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=ham 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?1768997207883005383?= X-GMAIL-MSGID: =?utf-8?q?1768997207883005383?= Add mmu_valid_gen into kvm_mmu_page description. mmu_valid_gen is used in shadow MMU for fast zapping. Update the doc to reflect that. Signed-off-by: Mingwei Zhang Reviewed-by: Kai Huang --- 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 3dce2426ad6d..0dbdb7fb8cc6 100644 --- a/Documentation/virt/kvm/x86/mmu.rst +++ b/Documentation/virt/kvm/x86/mmu.rst @@ -208,6 +208,10 @@ Shadow pages contain the following information: The page is not backed by a guest page table, but its first entry points to one. This is set if NPT uses 5-level page tables (host CR4.LA57=1) and is shadowing L1's 4-level NPT (L1 CR4.LA57=1). + mmu_valid_gen: + Used by comparing against kvm->arch.mmu_valid_gen to check whether the + shadow page is obsolete thus a convenient variable for fast zapping. + Note that TDP MMU does not use mmu_valid_gen. gfn: Either the guest page table containing the translations shadowed by this page, or the base page frame for linear translations. See role.direct.