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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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 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 2F103C49EA5 for ; Thu, 24 Jun 2021 18:14:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1369A613B1 for ; Thu, 24 Jun 2021 18:14:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232630AbhFXSQ2 (ORCPT ); Thu, 24 Jun 2021 14:16:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:42508 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232602AbhFXSQ0 (ORCPT ); Thu, 24 Jun 2021 14:16:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624558446; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2ny4N/dv5g7DO3oaKKsT3k5Lo/RLroZYI+1qWA8iS2Y=; b=i4hQ4JNrDXb07Ey5sILHPCkpkCzZR3IFYcMcDJ/Fcfss7e3wcjhInZarDw4mfZuvbH5sc1 NF2SWijnKUlmjf9KqMOGye7cjwDNnseM+c7dJhmiMRCOgiwkECXwc0k8nDDlADntilZs8U Lh9mSHThnwztZwRdy6adu5ES0rke++A= Received: from mail-qk1-f197.google.com (mail-qk1-f197.google.com [209.85.222.197]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-165-IOOgXmztP4OrDJWaZNQB6A-1; Thu, 24 Jun 2021 14:14:05 -0400 X-MC-Unique: IOOgXmztP4OrDJWaZNQB6A-1 Received: by mail-qk1-f197.google.com with SMTP id y206-20020a3764d70000b02903b2ff4c81b1so6543402qkb.21 for ; Thu, 24 Jun 2021 11:14:05 -0700 (PDT) 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:mime-version:content-transfer-encoding; bh=2ny4N/dv5g7DO3oaKKsT3k5Lo/RLroZYI+1qWA8iS2Y=; b=i3ZudLv4I4pbWn4wj5AuIVm0Q4wiGXXxuRX8udwRkxRO71pYasQAYDxJieDHSNBdh9 WVVxdCqS1HwBdduc4vo/cOq+yQYk8pd1E93OfmgPnEKeSJRTfm4B/zrxRtMkl70t3kWk qF5xKCIl6/I9r0IzseoamYM40bMdDyaTb6SRljavXNpyNdfytihC2vMGZRIS0/7ffUzz PNAjDrKeDCFpHF1qcGk2ZFv5miRx6YBOAdV9mNjNOOBMBw9LL7uNKaummeGOZbJ/pJJl 7FJC9bcOaAUFSE1CfEkGcZm/WhBy1XfR1eEi6oOMcmC4ias8goIvR26fzwXBDpgZ5o6y L+Mg== X-Gm-Message-State: AOAM533nkfzHauu5U+JJDsJvtaBwcW1A2fGUaCTO8QILwuOCibAb93IA BQNA+ls3hKVn2agWhndDyrGv1ggtZdBmbGNj0xGMQH1mgpGq8RSBBRoHlfJmYphzx4FFthe7hv6 QjqhaQYZsGnXzmYeB/jzk50hOMtxWEvfdL/jfkj2u3xA507XVILRmzjwADn+gWg== X-Received: by 2002:a37:f510:: with SMTP id l16mr7017498qkk.205.1624558444897; Thu, 24 Jun 2021 11:14:04 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw5xeg8fkVzCvznQIXVQuhoVQJFpwIzM0cNNpma6+xzwHDzRQWv3casplWNqC4T8UNyOmhZfQ== X-Received: by 2002:a37:f510:: with SMTP id l16mr7017476qkk.205.1624558444679; Thu, 24 Jun 2021 11:14:04 -0700 (PDT) Received: from t490s.redhat.com (bras-base-toroon474qw-grc-65-184-144-111-238.dsl.bell.ca. [184.144.111.238]) by smtp.gmail.com with ESMTPSA id b7sm2529301qti.21.2021.06.24.11.14.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Jun 2021 11:14:04 -0700 (PDT) From: Peter Xu To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Paolo Bonzini , Vitaly Kuznetsov , Maxim Levitsky , peterx@redhat.com, Sean Christopherson Subject: [PATCH 4/9] KVM: X86: Introduce pte_list_count() helper Date: Thu, 24 Jun 2021 14:13:51 -0400 Message-Id: <20210624181356.10235-5-peterx@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210624181356.10235-1-peterx@redhat.com> References: <20210624181356.10235-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This helper is used to count the number of rmap entries in the rmap list pointed by the kvm_rmap_head. Signed-off-by: Peter Xu --- arch/x86/kvm/mmu/mmu.c | 21 +++++++++++++++++++++ arch/x86/kvm/mmu/mmu_internal.h | 1 + 2 files changed, 22 insertions(+) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 6dd338738118..80263ecb1de3 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -927,6 +927,27 @@ static void pte_list_remove(struct kvm_rmap_head *rmap_head, u64 *sptep) __pte_list_remove(sptep, rmap_head); } +unsigned int pte_list_count(struct kvm_rmap_head *rmap_head) +{ + struct pte_list_desc *desc; + unsigned int i, count = 0; + + if (!rmap_head->val) + return 0; + else if (!(rmap_head->val & 1)) + return 1; + + desc = (struct pte_list_desc *)(rmap_head->val & ~1ul); + + while (desc) { + for (i = 0; (i < PTE_LIST_EXT) && desc->sptes[i]; i++) + count++; + desc = desc->more; + } + + return count; +} + static struct kvm_rmap_head *__gfn_to_rmap(gfn_t gfn, int level, struct kvm_memory_slot *slot) { diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index d64ccb417c60..3cd1a878ffeb 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -126,6 +126,7 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, struct kvm_memory_slot *slot, u64 gfn); void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, u64 start_gfn, u64 pages); +unsigned int pte_list_count(struct kvm_rmap_head *rmap_head); /* * Return values of handle_mmio_page_fault, mmu.page_fault, and fast_page_fault(). -- 2.31.1