Message ID | 20211223222318.1039223-14-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 DF596C433EF for <kvm@archiver.kernel.org>; Thu, 23 Dec 2021 22:24:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350774AbhLWWYd (ORCPT <rfc822;kvm@archiver.kernel.org>); Thu, 23 Dec 2021 17:24:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350554AbhLWWYC (ORCPT <rfc822;kvm@vger.kernel.org>); Thu, 23 Dec 2021 17:24:02 -0500 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 64EDDC06175F for <kvm@vger.kernel.org>; Thu, 23 Dec 2021 14:24:02 -0800 (PST) Received: by mail-pj1-x1049.google.com with SMTP id y2-20020a17090a1f4200b001b103d6b6d0so6408082pjy.1 for <kvm@vger.kernel.org>; Thu, 23 Dec 2021 14:24:02 -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=BNCCSYnc3JAlm7sEigQj1irsmiDBhrB62HCDCGqzwM4=; b=hsx3AHY9e9KGs5P9Y/6uTZVutXLJXF3CgK88i4NdUo3gvWGHAaH/hzMV99ToAe8QNh yh8fX6SyxC12fB88YAwO7kI032Jxfa3v6wrr/20tiI0G5ZTkBxI5gW15jV1Zhe58uCKU 5RZ6gBAO1oksMgd5g0+eF/Eu3NQ5gNj/BE9/GGs9fAct3ToiAprcvH90xNW7o0nNzTuz vPi+xQVbNURRJL/SM40i++TwCmFGkFyUeEcHJngaIdf9XWBJWs3LlgKLmCZdcpRBLzuC VZyL1E1m/JZ3MTBSITppI5+IHIb/04xt62Xx3BwYUs/MLhjQ/ozRh8weHP29er8X78xs 7oWg== 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=BNCCSYnc3JAlm7sEigQj1irsmiDBhrB62HCDCGqzwM4=; b=PGG1EIrypSwROXqohOa5+ySmHrTUh3RsX3JFPolBOe+U7niKsZXeI7LQg6OG8hS2S0 gbIM2UKZLmP99ulPIIdrldhzSaLKK67iGVzz88HGfid/FdseWwOFVo0/IC1BOiSWyupF cWbBYHJ8v3GxVT/54NOvJN5F3jwJ2sUCdoHZMyFxS5UlasXGQYb0kfbJBU1x76cMmZ1S k4fOnhyczF7lkiVUWm/gjCfZVEOjHubcevPn9uK3ndGnaQry55a0KnNRIbTsmMMJNt6c M2t2kQ3Q56CmKeVHh3rcCB9qLjdWC3dub9L5QH3OVPNVXL3zYD2X9sp4uZWF6wqoo2v2 DDHg== X-Gm-Message-State: AOAM530OUcQU/w/uFtljt4Jj0Edz1tTxt1Iz2gT11KwFKa5bDOhTMa9l Wz9qSm+xYtnxHJNu92kUznGmSJsBNXc= X-Google-Smtp-Source: ABdhPJyrIjNroCeHcGoLme72TYYoLeEFX8HuM7VJuuvDeTFICp/qElBwDUte+nFyADv0mybL0LB72crz4rk= X-Received: from seanjc.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3e5]) (user=seanjc job=sendgmr) by 2002:a17:90b:e91:: with SMTP id fv17mr4976856pjb.217.1640298241971; Thu, 23 Dec 2021 14:24:01 -0800 (PST) Reply-To: Sean Christopherson <seanjc@google.com> Date: Thu, 23 Dec 2021 22:23:01 +0000 In-Reply-To: <20211223222318.1039223-1-seanjc@google.com> Message-Id: <20211223222318.1039223-14-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 13/30] KVM: x86/mmu: Drop RCU after processing each root in MMU notifier hooks 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 6c51548d89b1..47424e22a681 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1071,18 +1071,19 @@ static __always_inline bool kvm_tdp_mmu_handle_gfn(struct kvm *kvm, struct tdp_iter iter; bool ret = false; - rcu_read_lock(); - /* * Don't support rescheduling, none of the MMU notifiers that funnel * into this helper allow blocking; it'd be dead, wasteful code. */ for_each_tdp_mmu_root(kvm, root, range->slot->as_id) { + rcu_read_lock(); + tdp_root_for_each_leaf_pte(iter, root, range->start, range->end) ret |= handler(kvm, &iter, range); + + rcu_read_unlock(); } - rcu_read_unlock(); return ret; }