From patchwork Sun Apr 15 21:53:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: KarimAllah Ahmed X-Patchwork-Id: 10341839 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6A1FF601D7 for ; Sun, 15 Apr 2018 21:58:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5031927C2D for ; Sun, 15 Apr 2018 21:58:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 44B8927D16; Sun, 15 Apr 2018 21:58:08 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable 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 E0DC727C2D for ; Sun, 15 Apr 2018 21:58:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753100AbeDOV6E (ORCPT ); Sun, 15 Apr 2018 17:58:04 -0400 Received: from smtp-fw-9101.amazon.com ([207.171.184.25]:21598 "EHLO smtp-fw-9101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752573AbeDOVy5 (ORCPT ); Sun, 15 Apr 2018 17:54:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1523829297; x=1555365297; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=VL93ceqB8XPV9HPcfLkWFLcM5/uR+lScdISj7eIbUDo=; b=bX0dzWrPF8i1fmZGrcQvQnROtlfKszTAE7U/mmBmECNErhx6gck4f/s/ UN1zgdZjddTEHGAekq6+bcXzWc9Bp+lRDi8ApsqC/MtRN2K/+9EAcoLEL 07VpAJdTbKicbYtM99uDT/WUWdTX8SuJts8Lzyfr/zxS5INF07jjMqla2 0=; X-IronPort-AV: E=Sophos;i="5.48,456,1517875200"; d="scan'208";a="735371358" Received: from sea3-co-svc-lb6-vlan3.sea.amazon.com (HELO email-inbound-relay-2b-4e24fd92.us-west-2.amazon.com) ([10.47.22.38]) by smtp-border-fw-out-9101.sea19.amazon.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 15 Apr 2018 21:54:56 +0000 Received: from u54e1ad5160425a4b64ea.ant.amazon.com (pdx2-ws-svc-lb17-vlan3.amazon.com [10.247.140.70]) by email-inbound-relay-2b-4e24fd92.us-west-2.amazon.com (8.14.7/8.14.7) with ESMTP id w3FLsqjK130574 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sun, 15 Apr 2018 21:54:53 GMT Received: from u54e1ad5160425a4b64ea.ant.amazon.com (localhost [127.0.0.1]) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Debian-3) with ESMTP id w3FLspSe013444; Sun, 15 Apr 2018 23:54:51 +0200 Received: (from karahmed@localhost) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Submit) id w3FLspkp013443; Sun, 15 Apr 2018 23:54:51 +0200 From: KarimAllah Ahmed To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com Cc: KarimAllah Ahmed Subject: [PATCH v2 07/12] KVM/nVMX: Use kvm_vcpu_map when mapping the virtual APIC page Date: Sun, 15 Apr 2018 23:53:13 +0200 Message-Id: <1523829198-13236-8-git-send-email-karahmed@amazon.de> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523829198-13236-1-git-send-email-karahmed@amazon.de> References: <1523829198-13236-1-git-send-email-karahmed@amazon.de> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Use kvm_vcpu_map when mapping the virtual APIC page since using kvm_vcpu_gpa_to_page() and kmap() will only work for guest memory that has a "struct page". One additional semantic change is that the virtual host mapping lifecycle has changed a bit. It now has the same lifetime of the pinning of the virtual APIC page on the host side. Signed-off-by: KarimAllah Ahmed --- v1 -> v2: - Do not change the lifecycle of the mapping (pbonzini) - Use pfn_to_hpa instead of gfn_to_gpa --- arch/x86/kvm/vmx.c | 34 +++++++++++----------------------- 1 file changed, 11 insertions(+), 23 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 6d335fc..b55053a 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -492,9 +492,8 @@ struct nested_vmx { * pointers, so we must keep them pinned while L2 runs. */ struct page *apic_access_page; - struct page *virtual_apic_page; + struct kvm_host_map virtual_apic_map; struct page *pi_desc_page; - struct kvm_host_map msr_bitmap_map; struct pi_desc *pi_desc; @@ -5572,11 +5571,12 @@ static void vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu) max_irr = find_last_bit((unsigned long *)vmx->nested.pi_desc->pir, 256); if (max_irr != 256) { - vapic_page = kmap(vmx->nested.virtual_apic_page); + vapic_page = vmx->nested.virtual_apic_map.hva; + if (!vapic_page) + return; + __kvm_apic_update_irr(vmx->nested.pi_desc->pir, vapic_page, &max_irr); - kunmap(vmx->nested.virtual_apic_page); - status = vmcs_read16(GUEST_INTR_STATUS); if ((u8)max_irr > ((u8)status & 0xff)) { status &= ~0xff; @@ -7806,10 +7806,7 @@ static void free_nested(struct vcpu_vmx *vmx) kvm_release_page_dirty(vmx->nested.apic_access_page); vmx->nested.apic_access_page = NULL; } - if (vmx->nested.virtual_apic_page) { - kvm_release_page_dirty(vmx->nested.virtual_apic_page); - vmx->nested.virtual_apic_page = NULL; - } + kvm_vcpu_unmap(&vmx->nested.virtual_apic_map); if (vmx->nested.pi_desc_page) { kunmap(vmx->nested.pi_desc_page); kvm_release_page_dirty(vmx->nested.pi_desc_page); @@ -10358,6 +10355,7 @@ static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu) { struct vmcs12 *vmcs12 = get_vmcs12(vcpu); struct vcpu_vmx *vmx = to_vmx(vcpu); + struct kvm_host_map *map; struct page *page; u64 hpa; @@ -10395,11 +10393,7 @@ static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu) } if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) { - if (vmx->nested.virtual_apic_page) { /* shouldn't happen */ - kvm_release_page_dirty(vmx->nested.virtual_apic_page); - vmx->nested.virtual_apic_page = NULL; - } - page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->virtual_apic_page_addr); + map = &vmx->nested.virtual_apic_map; /* * If translation failed, VM entry will fail because @@ -10414,11 +10408,8 @@ static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu) * control. But such a configuration is useless, so * let's keep the code simple. */ - if (!is_error_page(page)) { - vmx->nested.virtual_apic_page = page; - hpa = page_to_phys(vmx->nested.virtual_apic_page); - vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, hpa); - } + if (!kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->virtual_apic_page_addr), map)) + vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, pfn_to_hpa(map->pfn)); } if (nested_cpu_has_posted_intr(vmcs12)) { @@ -12076,10 +12067,7 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, kvm_release_page_dirty(vmx->nested.apic_access_page); vmx->nested.apic_access_page = NULL; } - if (vmx->nested.virtual_apic_page) { - kvm_release_page_dirty(vmx->nested.virtual_apic_page); - vmx->nested.virtual_apic_page = NULL; - } + kvm_vcpu_unmap(&vmx->nested.virtual_apic_map); if (vmx->nested.pi_desc_page) { kunmap(vmx->nested.pi_desc_page); kvm_release_page_dirty(vmx->nested.pi_desc_page);