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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 1A2C5C35250 for ; Fri, 7 Feb 2020 18:18:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EC11E222D9 for ; Fri, 7 Feb 2020 18:18:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727788AbgBGSSs (ORCPT ); Fri, 7 Feb 2020 13:18:48 -0500 Received: from mx01.bbu.dsd.mx.bitdefender.com ([91.199.104.161]:40612 "EHLO mx01.bbu.dsd.mx.bitdefender.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726951AbgBGSQm (ORCPT ); Fri, 7 Feb 2020 13:16:42 -0500 Received: from smtp.bitdefender.com (smtp01.buh.bitdefender.com [10.17.80.75]) by mx01.bbu.dsd.mx.bitdefender.com (Postfix) with ESMTPS id BD006305D48D; Fri, 7 Feb 2020 20:16:38 +0200 (EET) Received: from host.bbu.bitdefender.biz (unknown [195.210.4.22]) by smtp.bitdefender.com (Postfix) with ESMTPSA id 81CBE3052068; Fri, 7 Feb 2020 20:16:38 +0200 (EET) From: =?UTF-8?q?Adalbert=20Laz=C4=83r?= To: kvm@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, Paolo Bonzini , Sean Christopherson , =?UTF-8?q?=C8=98tefan=20=C8=98icleru?= , =?UTF-8?q?Adalbert=20Laz=C4=83r?= Subject: [RFC PATCH v7 05/78] KVM: add kvm_get_max_gfn() Date: Fri, 7 Feb 2020 20:15:23 +0200 Message-Id: <20200207181636.1065-6-alazar@bitdefender.com> In-Reply-To: <20200207181636.1065-1-alazar@bitdefender.com> References: <20200207181636.1065-1-alazar@bitdefender.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Ștefan Șicleru This function is needed for the KVMI_VM_GET_MAX_GFN command. Signed-off-by: Ștefan Șicleru Signed-off-by: Adalbert Lazăr --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 2fb276655cc2..e826e874b998 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -769,6 +769,7 @@ struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); void mark_page_dirty(struct kvm *kvm, gfn_t gfn); +gfn_t kvm_get_max_gfn(struct kvm *kvm); struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu); struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index ab66d5a08581..20ffc86fd8d1 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1178,6 +1178,29 @@ static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, return kvm_set_memory_region(kvm, mem); } +gfn_t kvm_get_max_gfn(struct kvm *kvm) +{ + struct kvm_memory_slot *memslot; + struct kvm_memslots *slots; + gfn_t max_gfn = 0; + int i, idx; + + idx = srcu_read_lock(&kvm->srcu); + spin_lock(&kvm->mmu_lock); + + for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { + slots = __kvm_memslots(kvm, i); + kvm_for_each_memslot(memslot, slots) + max_gfn = max(max_gfn, memslot->base_gfn + + memslot->npages); + } + + spin_unlock(&kvm->mmu_lock); + srcu_read_unlock(&kvm->srcu, idx); + + return max_gfn; +} + int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log, int *is_dirty) {