From patchwork Sat Oct 13 14:53:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 10640179 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 85F9E933 for ; Sat, 13 Oct 2018 14:55:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7816E29D32 for ; Sat, 13 Oct 2018 14:55:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 69B372AD99; Sat, 13 Oct 2018 14:55:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1CCA929D32 for ; Sat, 13 Oct 2018 14:55:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727007AbeJMWcj (ORCPT ); Sat, 13 Oct 2018 18:32:39 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:44161 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726281AbeJMWci (ORCPT ); Sat, 13 Oct 2018 18:32:38 -0400 Received: by mail-pl1-f194.google.com with SMTP id p25-v6so7251112pli.11; Sat, 13 Oct 2018 07:55:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=7Q3nhAKtrRoanNPwr2twsR26XJWb59XJ8/rc2Pd+TSM=; b=juTHXYgXukWYR3Td4NTZZK6EJLKtcc6JdtqVHyNu+kVR7xNZRl7aB5E1F/+X0kGgap qxYqLJppNLOOpufkoOoq0YAr4eTDOyTlmY1XkFTntdxA1E9W+6nsoUFrymLOxvIkISDs VNWAIoDMPg1407iiY6co46rGu+zg0rOqZi2LzPtdoaKkNQayIsu1RK+wapeaI3hNJk4c i6c6RnmaJcYLt5AkoDGg9h+sCiOcxqWLiqodUdP5rqLHXEftTO2e7Yy58kFmcFgn4DN9 jheeK/0XgrxVB/SypoJqIXIctCGbK/JD3phe3myubOehZ0O7hKTwPm8lSthWuQLyY8vD WWtA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=7Q3nhAKtrRoanNPwr2twsR26XJWb59XJ8/rc2Pd+TSM=; b=C8ZpgukMOt7ORDWRvmBSKSh81vvmH3/W7HLbMSgWnZNeDE8D0KFriYL8fzsJmQRYVe n5CucQsXXylBbA9XjYr4Yc5+nImDhQP5oFbd1kf0Z+2fwjN4NO8C4fs97q3KwxEtuRDw FXF5C5Bec9/FvemABrmomlw8vEM0nPE1A+4ijsGxOIWcj5aL+PfS7i07Qqib5XfdqXO3 7xBvEigY2OPsOwDlNOaDn5A64WpVrJmaX1FulxweorMf69PZTECWXq1D9MdEa9onF70r 0iQTtqhrcbX9W3+RWOI/jSnwN5mLZJBdAtRpP1Hv0rXHfw4AwTF9U3Zf+DmsLRWg+TbH Vssw== X-Gm-Message-State: ABuFfohPp1NMvd6bIhfd+CAq5u3T9xAyz3tMl82aKcNtazMtJNIyU67u m/vMvX4BAHT+LW5YRJtgAzM= X-Google-Smtp-Source: ACcGV63b0c5lCTEQrOnu8mN9LxriClh6gIER0G18ZTTiuME/nyTJxVt+XPErq0I0h9n5EgJY8XNvgQ== X-Received: by 2002:a17:902:509:: with SMTP id 9-v6mr10216527plf.155.1539442512417; Sat, 13 Oct 2018 07:55:12 -0700 (PDT) Received: from localhost.corp.microsoft.com ([2404:f801:9000:18:d9bf:62c6:740b:9fc4]) by smtp.googlemail.com with ESMTPSA id v81-v6sm8688724pfj.25.2018.10.13.07.55.08 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 13 Oct 2018 07:55:11 -0700 (PDT) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com Cc: Lan Tianyu , kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com, devel@linuxdriverproject.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, michael.h.kelley@microsoft.com, vkuznets@redhat.com Subject: [PATCH V4 8/15] KVM/MMU: Flush tlb directly in kvm_mmu_zap_collapsible_spte() Date: Sat, 13 Oct 2018 22:53:59 +0800 Message-Id: <20181013145406.4911-9-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181013145406.4911-1-Tianyu.Lan@microsoft.com> References: <20181013145406.4911-1-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lan Tianyu kvm_mmu_zap_collapsible_spte() returns flush request to the slot_handle_leaf() and the latter does flush on demand. When range flush is available, make kvm_mmu_zap_collapsible_spte() to flush tlb with range directly to avoid returning range back to slot_handle_leaf(). Signed-off-by: Lan Tianyu --- arch/x86/kvm/mmu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index c4f7679f12c3..e984a0067a43 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -5743,7 +5743,13 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm, !kvm_is_reserved_pfn(pfn) && PageTransCompoundMap(pfn_to_page(pfn))) { drop_spte(kvm, sptep); - need_tlb_flush = 1; + + if (kvm_available_flush_tlb_with_range()) + kvm_flush_remote_tlbs_with_address(kvm, sp->gfn, + KVM_PAGES_PER_HPAGE(sp->role.level)); + else + need_tlb_flush = 1; + goto restart; } }