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 X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A35E4C48BD1 for ; Wed, 9 Jun 2021 23:43:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8ADDE613F0 for ; Wed, 9 Jun 2021 23:43:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230175AbhFIXpP (ORCPT ); Wed, 9 Jun 2021 19:45:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48456 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230059AbhFIXpG (ORCPT ); Wed, 9 Jun 2021 19:45:06 -0400 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B592C0613A2 for ; Wed, 9 Jun 2021 16:43:11 -0700 (PDT) Received: by mail-qt1-x849.google.com with SMTP id h20-20020ac87d540000b0290249d0777b80so2376834qtb.13 for ; Wed, 09 Jun 2021 16:43:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=ActxyiNIAcKHyidC7LFkIvgoRqVhbyRGA66pjNXcgQE=; b=m07n+P+gFAsAJyhYlFLQ9ZQrL75NF7caFSlvPHloWwX3zHtXO4cbiRRCpbNQ0CVclM Cx5o6D+MnSCtYDGyj8nYX4pcYiYc5I9DceQ2rAA4KmVGM5o02u+qlo9IuiS+LTQ5NQN9 J7/Sy+zysap40wxcRdjNFLQs40StLgmMm5U4OjYIGZF5rMyYp7UcvaQUeVK6ma1h3pk5 iE5z3JUX0ZWsaLac5W/G7x1ieWfyUeCY7ymkW4rtzvWmNBlYJ+aARI1a+ujs2PhEIvg/ JVkDI5PXrVqVJjwDq/ZVqMr7jglH3bUMKpTLUb+idz2IpfjW2fs0pmFhDFBqD2WPUUYU 5XkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=ActxyiNIAcKHyidC7LFkIvgoRqVhbyRGA66pjNXcgQE=; b=lzeCQ02J7O+Q6XAw14kQOX/ir/5HTeZFYam3BEAOyIdnAAkxaioRfyXI5TaMbniWbK kMjHa7O7NpUZYfKP3zfs+yrqE/lsRcI6TxGZ4r4rBBuPXdkN+7W2lmHqSoUuiTZYoxYu cspB7e/Xdy5RXIZAZk9BVuSHbhHVhyi237SYLxE9u7NYdnTak3yHeBUTHVxFtkpavOU1 /OzN8afJMAycGXrtCc/pw5oTXoHf88A8Ukly9GkdWD9W7/Uz3Yr4NT1myd+AaPHTUbxB nrnm5EcYFH0NmJWD+8HwVZVHJm3zAmxoJf3i8Uqdsrxqsa/oANHSxBgQMQXgsSH8S8VD Y/Og== X-Gm-Message-State: AOAM530JgWEdaR9+ymDTCvA+epnhhUWhypmsNJvx9ih/4b9KAqpqbGaQ 3o6AoNQ0oQpLXHqbyKIdrvZ896Ps4Bg= X-Google-Smtp-Source: ABdhPJzmrF3mElvNIB2Fkk21bCN8biEs9twT/HY2vEYwJLImwQzdCDYt5p3QSFOLneMFNnnfPZroTu4kslw= X-Received: from seanjc798194.pdx.corp.google.com ([2620:15c:f:10:8daf:e5e:ae50:4f28]) (user=seanjc job=sendgmr) by 2002:a0c:eda5:: with SMTP id h5mr2604134qvr.26.1623282190465; Wed, 09 Jun 2021 16:43:10 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 9 Jun 2021 16:42:32 -0700 In-Reply-To: <20210609234235.1244004-1-seanjc@google.com> Message-Id: <20210609234235.1244004-13-seanjc@google.com> Mime-Version: 1.0 References: <20210609234235.1244004-1-seanjc@google.com> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog Subject: [PATCH 12/15] KVM: x86: Defer MMU sync on PCID invalidation From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Junaid Shahid , Maxim Levitsky , Lai Jiangshan Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Defer the MMU sync on PCID invalidation so that multiple sync requests in a single VM-Exit are batched. This is a very minor optimization as checking for unsync'd children is quite cheap. Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 9620d8936dc4..d3a2a3375541 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1096,7 +1096,7 @@ static void kvm_invalidate_pcid(struct kvm_vcpu *vcpu, unsigned long pcid) * happen anyway before switching to any other CR3. */ if (kvm_get_active_pcid(vcpu) == pcid) { - kvm_mmu_sync_roots(vcpu); + kvm_make_request(KVM_REQ_MMU_SYNC, vcpu); kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu); } -- 2.32.0.rc1.229.g3e70b5a671-goog