From patchwork Fri Jan 4 08:53:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 10748153 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 CD4CC13AD for ; Fri, 4 Jan 2019 08:55:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC7AD27F94 for ; Fri, 4 Jan 2019 08:55:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B006527FA5; Fri, 4 Jan 2019 08:55:04 +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 C93F727F94 for ; Fri, 4 Jan 2019 08:54:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727348AbfADIyw (ORCPT ); Fri, 4 Jan 2019 03:54:52 -0500 Received: from mail-pf1-f193.google.com ([209.85.210.193]:47003 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727291AbfADIyv (ORCPT ); Fri, 4 Jan 2019 03:54:51 -0500 Received: by mail-pf1-f193.google.com with SMTP id c73so17983620pfe.13; Fri, 04 Jan 2019 00:54:50 -0800 (PST) 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=DbPYODlBh2cswgOkm5n3Xtx1VG29YKWZuHO2kRQx3jE=; b=uIGZ66sWc3MSyPixVlFIwqq9X9Xawe/7lcCM/24F9OUU1MhgIXXEp+AbmzflEK13nM 2o+Z7uoAl1u/wmPUG3KdiBwSgFXXPl4EIy5LvDsMJPUd2xQxtWZR+TAhyRkwglbNz5am o/KasvYoE5o7W/xDHeUq9nW1U+hq6D2rEmY+fBsBoq/f34Ew+f9isuerC2+UXmqf/7xW VEHXij5Tmwcu8CH5Sve62zd3WlvJk2e1xqpMBDePH5ZEkitNlq/TWfWZEQBZXcHzrVop sJBt1UN3Ju9tBhxkEk4LYvpZdCJEK2L7xGpWi4h9Qu/xiaccyXt/cvhCySXdqM36T05O eX1g== 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=DbPYODlBh2cswgOkm5n3Xtx1VG29YKWZuHO2kRQx3jE=; b=l8s7Cj5BLYVnFE6FhK2apEawje3HBY9Vd8LC98DlyZndxVR8+3tPGbBgW8/0CRu6QC PK4rA+uj2qp9BISciFoQ+Far1e/GPgpDz7hZJDuI4to4vH5zPHkEJvIF2YQIKuuOwLUk el8wWhAFhLViNiwV4nXtQ/P9VofXNREN9sKQTRQ8kj6+6xkQZx7FOyxsYyJ9LcBOepAF sEBlzuqHbSRD6XarZQPE7Mb+DXUIhPuVC0+E9MAmaKWFQ13xt+xe3cnOqaBXQkoFKMxS ufDciJq5tzG1I7uXQacySLxEYJ92WczZG2Nyb5B3CmdK2hXktjdmS/5PduqS7dUCHBpF c0YA== X-Gm-Message-State: AA+aEWZPD7o3G44AzcB2cWnlHRV8ZWqraoCbnUi+lq/70phv1Wkkfc0D xMFLIa0KkninVv4KSCoUp4c= X-Google-Smtp-Source: ALg8bN4wIfpC3j2afh4wGFjYegQADeZ0K/ccHcj0qIsaA3H5W5N7IpT4CBOOzO8AUje2LUSMO2pDwg== X-Received: by 2002:a62:1992:: with SMTP id 140mr51523150pfz.33.1546592089991; Fri, 04 Jan 2019 00:54:49 -0800 (PST) Received: from localhost.corp.microsoft.com ([2404:f801:9000:1a:d9bd:62c6:740b:9fc4]) by smtp.googlemail.com with ESMTPSA id i21sm99772145pgm.17.2019.01.04.00.54.42 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 04 Jan 2019 00:54:49 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com Cc: Lan Tianyu , christoffer.dall@arm.com, marc.zyngier@arm.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, jhogan@kernel.org, ralf@linux-mips.org, paul.burton@mips.com, paulus@ozlabs.org, benh@kernel.crashing.org, mpe@ellerman.id.au, pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, michael.h.kelley@microsoft.com, kys@microsoft.com, vkuznets@redhat.com Subject: [PATCH 4/11] KVM/MMU: Introduce tlb flush with range list Date: Fri, 4 Jan 2019 16:53:58 +0800 Message-Id: <20190104085405.40356-5-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20190104085405.40356-1-Tianyu.Lan@microsoft.com> References: <20190104085405.40356-1-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 This patch is to introduce tlb flush with range list interface and use struct kvm_mmu_page as list entry. Use flush list function in the kvm_mmu_commit_zap_page(). Signed-off-by: Lan Tianyu --- arch/x86/include/asm/kvm_host.h | 7 +++++++ arch/x86/kvm/mmu.c | 24 +++++++++++++++++++++++- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 78d2a6714c3b..22dbaa8fba32 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -316,6 +316,12 @@ struct kvm_rmap_head { struct kvm_mmu_page { struct list_head link; + + /* + * Tlb flush with range list uses struct kvm_mmu_page as list entry + * and all list operations should be under protection of mmu_lock. + */ + struct list_head flush_link; struct hlist_node hash_link; bool unsync; @@ -443,6 +449,7 @@ struct kvm_mmu { struct kvm_tlb_range { u64 start_gfn; u64 pages; + struct list_head *flush_list; }; enum pmc_type { diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 068694fa2371..d3272c5066ea 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -289,6 +289,17 @@ static void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, range.start_gfn = start_gfn; range.pages = pages; + range.flush_list = NULL; + + kvm_flush_remote_tlbs_with_range(kvm, &range); +} + +static void kvm_flush_remote_tlbs_with_list(struct kvm *kvm, + struct list_head *flush_list) +{ + struct kvm_tlb_range range; + + range.flush_list = flush_list; kvm_flush_remote_tlbs_with_range(kvm, &range); } @@ -2708,6 +2719,7 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm, struct list_head *invalid_list) { struct kvm_mmu_page *sp, *nsp; + LIST_HEAD(flush_list); if (list_empty(invalid_list)) return; @@ -2721,7 +2733,17 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm, * In addition, kvm_flush_remote_tlbs waits for all vcpus to exit * guest mode and/or lockless shadow page table walks. */ - kvm_flush_remote_tlbs(kvm); + if (kvm_available_flush_tlb_with_range()) { + list_for_each_entry(sp, invalid_list, link) + if (sp->sptep && is_last_spte(*sp->sptep, + sp->role.level)) + list_add(&sp->flush_link, &flush_list); + + if (!list_empty(&flush_list)) + kvm_flush_remote_tlbs_with_list(kvm, &flush_list); + } else { + kvm_flush_remote_tlbs(kvm); + } list_for_each_entry_safe(sp, nsp, invalid_list, link) { WARN_ON(!sp->role.invalid || sp->root_count);