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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 CF221ECDE3D for ; Sat, 20 Oct 2018 22:23:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 96A6B21712 for ; Sat, 20 Oct 2018 22:23:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.de header.i=@amazon.de header.b="vFq6KLXk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 96A6B21712 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727421AbeJUGe6 (ORCPT ); Sun, 21 Oct 2018 02:34:58 -0400 Received: from smtp-fw-6001.amazon.com ([52.95.48.154]:56397 "EHLO smtp-fw-6001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727173AbeJUGe5 (ORCPT ); Sun, 21 Oct 2018 02:34:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1540074179; x=1571610179; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=RJg3pN5dO/l5CvDyHcsvfScPyBcEk0q0fpKPOO0lu6I=; b=vFq6KLXkDWHnp0YjvQO0Np9s6K4Qsa9WUWGcQP7IxExWuexP3Q1KoFF0 kg5+KXpq6XzNCRXhz0uNNc5CFHwnY4M0yTD5o2MFH5C0SLg98708Ok4n8 //3IPNMB/hAn/XIP2Cfrox7n7VzCds/JHIjIME00LBUCPFq8faQpWeuRK E=; X-IronPort-AV: E=Sophos;i="5.54,405,1534809600"; d="scan'208";a="364167577" Received: from iad6-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-1e-97fdccfd.us-east-1.amazon.com) ([10.124.125.6]) by smtp-border-fw-out-6001.iad6.amazon.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 20 Oct 2018 22:22:58 +0000 Received: from u54e1ad5160425a4b64ea.ant.amazon.com (iad7-ws-svc-lb50-vlan3.amazon.com [10.0.93.214]) by email-inbound-relay-1e-97fdccfd.us-east-1.amazon.com (8.14.7/8.14.7) with ESMTP id w9KMMqa6114297 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 20 Oct 2018 22:22:54 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 w9KMMpHx031623; Sun, 21 Oct 2018 00:22:51 +0200 Received: (from karahmed@localhost) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Submit) id w9KMMpoS031622; Sun, 21 Oct 2018 00:22:51 +0200 From: KarimAllah Ahmed To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com Cc: KarimAllah Ahmed Subject: [PATCH v3 08/13] KVM/nVMX: Use kvm_vcpu_map when mapping the posted interrupt descriptor table Date: Sun, 21 Oct 2018 00:22:20 +0200 Message-Id: <1540074145-31285-9-git-send-email-karahmed@amazon.de> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1540074145-31285-1-git-send-email-karahmed@amazon.de> References: <1540074145-31285-1-git-send-email-karahmed@amazon.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use kvm_vcpu_map when mapping the posted interrupt descriptor table 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 interrupt descriptor table page on the host side. Signed-off-by: KarimAllah Ahmed --- v1 -> v2: - Do not change the lifecycle of the mapping (pbonzini) --- arch/x86/kvm/vmx.c | 45 +++++++++++++++------------------------------ 1 file changed, 15 insertions(+), 30 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 83a5e95..0ae25c3 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -846,7 +846,7 @@ struct nested_vmx { */ struct page *apic_access_page; struct kvm_host_map virtual_apic_map; - struct page *pi_desc_page; + struct kvm_host_map pi_desc_map; struct kvm_host_map msr_bitmap_map; struct pi_desc *pi_desc; @@ -8469,12 +8469,8 @@ static void free_nested(struct vcpu_vmx *vmx) vmx->nested.apic_access_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); - vmx->nested.pi_desc_page = NULL; - vmx->nested.pi_desc = NULL; - } + kvm_vcpu_unmap(&vmx->nested.pi_desc_map); + vmx->nested.pi_desc = NULL; free_loaded_vmcs(&vmx->nested.vmcs02); } @@ -11444,24 +11440,16 @@ static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu) } if (nested_cpu_has_posted_intr(vmcs12)) { - if (vmx->nested.pi_desc_page) { /* shouldn't happen */ - kunmap(vmx->nested.pi_desc_page); - kvm_release_page_dirty(vmx->nested.pi_desc_page); - vmx->nested.pi_desc_page = NULL; + map = &vmx->nested.pi_desc_map; + + if (!kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->posted_intr_desc_addr), map)) { + vmx->nested.pi_desc = + (struct pi_desc *)(((void *)map->hva) + + offset_in_page(vmcs12->posted_intr_desc_addr)); + vmcs_write64(POSTED_INTR_DESC_ADDR, pfn_to_hpa(map->pfn) + + offset_in_page(vmcs12->posted_intr_desc_addr)); } - page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->posted_intr_desc_addr); - if (is_error_page(page)) - return; - vmx->nested.pi_desc_page = page; - vmx->nested.pi_desc = kmap(vmx->nested.pi_desc_page); - vmx->nested.pi_desc = - (struct pi_desc *)((void *)vmx->nested.pi_desc + - (unsigned long)(vmcs12->posted_intr_desc_addr & - (PAGE_SIZE - 1))); - vmcs_write64(POSTED_INTR_DESC_ADDR, - page_to_phys(vmx->nested.pi_desc_page) + - (unsigned long)(vmcs12->posted_intr_desc_addr & - (PAGE_SIZE - 1))); + } if (nested_vmx_prepare_msr_bitmap(vcpu, vmcs12)) vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL, @@ -13344,13 +13332,10 @@ 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; } + 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); - vmx->nested.pi_desc_page = NULL; - vmx->nested.pi_desc = NULL; - } + kvm_vcpu_unmap(&vmx->nested.pi_desc_map); + vmx->nested.pi_desc = NULL; /* * We are now running in L2, mmu_notifier will force to reload the -- 2.7.4