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 7073CC169C4 for ; Thu, 31 Jan 2019 20:26:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FAC7218FE for ; Thu, 31 Jan 2019 20:26:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.de header.i=@amazon.de header.b="OOVnKzZx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727761AbfAaU04 (ORCPT ); Thu, 31 Jan 2019 15:26:56 -0500 Received: from smtp-fw-6002.amazon.com ([52.95.49.90]:49881 "EHLO smtp-fw-6002.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725802AbfAaU04 (ORCPT ); Thu, 31 Jan 2019 15:26:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1548966415; x=1580502415; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=6FryeP5zW/W8eKl4Lc0QwnIwqwlVY+oDxaL0wA5absw=; b=OOVnKzZxVOkruDarVz7QLxzT+dUSyagA+GUkMhMIMT8ZpBURvT1r3EW4 vYcjAG1GEYVhZXntI6K/xRXLoAL0bU9iacHDbpDuzBU59pQ7LhgNmMGyn yMxmVBxLwg2GQyWW1S+/K757X99FuwE8u1/ecnKBPiBgjAKjj8H5TwgWl c=; X-IronPort-AV: E=Sophos;i="5.56,545,1539648000"; d="scan'208";a="384482626" Received: from iad6-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-1d-f273de60.us-east-1.amazon.com) ([10.124.125.6]) by smtp-border-fw-out-6002.iad6.amazon.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 31 Jan 2019 20:26:54 +0000 Received: from u54e1ad5160425a4b64ea.ant.amazon.com (iad7-ws-svc-lb50-vlan2.amazon.com [10.0.93.210]) by email-inbound-relay-1d-f273de60.us-east-1.amazon.com (8.14.7/8.14.7) with ESMTP id x0VKQnw9084336 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 31 Jan 2019 20:26:51 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 x0VKQl3I028888; Thu, 31 Jan 2019 21:26:47 +0100 Received: (from karahmed@localhost) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Submit) id x0VKQkXx028887; Thu, 31 Jan 2019 21:26:46 +0100 From: KarimAllah Ahmed To: x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Paolo Bonzini Cc: KarimAllah Ahmed Subject: [PATCH v6 02/14] X86/nVMX: Update the PML table without mapping and unmapping the page Date: Thu, 31 Jan 2019 21:24:32 +0100 Message-Id: <1548966284-28642-3-git-send-email-karahmed@amazon.de> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548966284-28642-1-git-send-email-karahmed@amazon.de> References: <1548966284-28642-1-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 Update the PML table without mapping and unmapping the page. This also avoids using kvm_vcpu_gpa_to_page(..) which assumes that there is a "struct page" for guest memory. As a side-effect of using kvm_write_guest_page the page is also properly marked as dirty. Signed-off-by: KarimAllah Ahmed Reviewed-by: David Hildenbrand Reviewed-by: Konrad Rzeszutek Wilk --- v1 -> v2: - Use kvm_write_guest_page instead of kvm_write_guest (pbonzini) - Do not use pointer arithmetic for pml_address (pbonzini) --- arch/x86/kvm/vmx/vmx.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 4341175..a3da75a 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7206,9 +7206,7 @@ static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu) { struct vmcs12 *vmcs12; struct vcpu_vmx *vmx = to_vmx(vcpu); - gpa_t gpa; - struct page *page = NULL; - u64 *pml_address; + gpa_t gpa, dst; if (is_guest_mode(vcpu)) { WARN_ON_ONCE(vmx->nested.pml_full); @@ -7228,15 +7226,13 @@ static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu) } gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS) & ~0xFFFull; + dst = vmcs12->pml_address + sizeof(u64) * vmcs12->guest_pml_index; - page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->pml_address); - if (is_error_page(page)) + if (kvm_write_guest_page(vcpu->kvm, gpa_to_gfn(dst), &gpa, + offset_in_page(dst), sizeof(gpa))) return 0; - pml_address = kmap(page); - pml_address[vmcs12->guest_pml_index--] = gpa; - kunmap(page); - kvm_release_page_clean(page); + vmcs12->guest_pml_index--; } return 0; -- 2.7.4