Message ID | 20211223222318.1039223-6-seanjc@google.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <kvm-owner@kernel.org> 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 A265BC433EF for <kvm@archiver.kernel.org>; Thu, 23 Dec 2021 22:23:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350455AbhLWWX4 (ORCPT <rfc822;kvm@archiver.kernel.org>); Thu, 23 Dec 2021 17:23:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350421AbhLWWXx (ORCPT <rfc822;kvm@vger.kernel.org>); Thu, 23 Dec 2021 17:23:53 -0500 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 833A6C061763 for <kvm@vger.kernel.org>; Thu, 23 Dec 2021 14:23:50 -0800 (PST) Received: by mail-pg1-x549.google.com with SMTP id x15-20020a63b20f000000b0033ff865bb09so3888484pge.2 for <kvm@vger.kernel.org>; Thu, 23 Dec 2021 14:23:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=fpIDrpWZwmj6BNONuDX3BQPSQp/TrPoIB2oyQBfGSwo=; b=GRcaaHwNTlE7NbCGNV/wpojHO94gvVAt5hXaCqZRlKal8bVZDb3AR7GVeWbPVCBIp3 JylcRrzpPNy4j7rzIblndCS2J2VE68MPO0n1sfCMr0Snbg06HoeuO8+GnBfNtMljOxvQ rjLPLHtz/rbxAA/maMsbXxnkiXxNQ/1D2UPVOJowJrFNEVjrLljnelDNEvtmMqcKH9h/ iDERCmRJOGePmwwt6T+JwDLSqX8CFOqZ2n6mILxbTJ2mao/zYUoKYGTo/nZYbgQTbRgX 6w9HzzMk/m/xRaxtf+jplH3oB6AfmUi6TgqUVA9fcdhQHIsvOZIyUFBPw5j6mk4OppQV +baQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=fpIDrpWZwmj6BNONuDX3BQPSQp/TrPoIB2oyQBfGSwo=; b=EMqNoUQNmWxCztyyzXYx1qtDIR6fQHm/AAZv/IwUxCyj25fd/1ngSv+b9bjyESPIA/ /AwXbPk1vn2bKgR/CWQaXmcnBzpmKayjoDgYxSGaM00v2jDVJtmU2Z6ow/5s0cbCihr8 s1UzU2MePgAGTK9qK+19GRO2NcAmtt1ML/N2QbJxGg79k7naqsSG5JH0SPt4ctkeL6Jx RarESL0IJrmChgpgyn4u4oui9MFOXppS1f4cerSYXRgiVVNPO6yXRqgXz4RI2OLdDyWJ AB0rTH4OF7SXmdXwDQK5BOMSsA4KmZnK+6pP27rNY8JV22oY7DfzUWzLLlZZJMQwZnvF cBtA== X-Gm-Message-State: AOAM5321h4RPi2eTbFbAN17npSPuxg8NVuNxIUs1B/k4nz7dXeU+7Yrz IMuvyORhQbR22nsEC4tAEfSF87IJI30= X-Google-Smtp-Source: ABdhPJyclXLRTwW6GJeCEWsyo4Kj1bo3ZQ/06TQEYE++AKaw4dOta3j54//LgcIFPrdnUSZzHL2DS03/7L0= X-Received: from seanjc.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3e5]) (user=seanjc job=sendgmr) by 2002:a17:902:7797:b0:143:88c3:7ff1 with SMTP id o23-20020a170902779700b0014388c37ff1mr3972429pll.22.1640298230048; Thu, 23 Dec 2021 14:23:50 -0800 (PST) Reply-To: Sean Christopherson <seanjc@google.com> Date: Thu, 23 Dec 2021 22:22:53 +0000 In-Reply-To: <20211223222318.1039223-1-seanjc@google.com> Message-Id: <20211223222318.1039223-6-seanjc@google.com> Mime-Version: 1.0 References: <20211223222318.1039223-1-seanjc@google.com> X-Mailer: git-send-email 2.34.1.448.ga2b2bfdf31-goog Subject: [PATCH v2 05/30] KVM: x86/mmu: Check for present SPTE when clearing dirty bit in TDP MMU From: Sean Christopherson <seanjc@google.com> To: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Ben Gardon <bgardon@google.com>, David Matlack <dmatlack@google.com>, Mingwei Zhang <mizhang@google.com> Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: <kvm.vger.kernel.org> X-Mailing-List: kvm@vger.kernel.org |
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KVM: x86/mmu: Overhaul TDP MMU zapping and flushing
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diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 41e975841ea6..fcbae282af6f 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1239,6 +1239,9 @@ static bool clear_dirty_gfn_range(struct kvm *kvm, struct kvm_mmu_page *root, if (tdp_mmu_iter_cond_resched(kvm, &iter, false, true)) continue; + if (!is_shadow_present_pte(iter.old_spte)) + continue; + if (spte_ad_need_write_protect(iter.old_spte)) { if (is_writable_pte(iter.old_spte)) new_spte = iter.old_spte & ~PT_WRITABLE_MASK;