From patchwork Wed Jan 13 02:46:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krish Sadhukhan X-Patchwork-Id: 12015645 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=-19.0 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, UNPARSEABLE_RELAY,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 F3029C433DB for ; Wed, 13 Jan 2021 02:47:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE54F207C8 for ; Wed, 13 Jan 2021 02:47:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728282AbhAMCr1 (ORCPT ); Tue, 12 Jan 2021 21:47:27 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:42942 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726724AbhAMCr1 (ORCPT ); Tue, 12 Jan 2021 21:47:27 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10D2isTC069864; Wed, 13 Jan 2021 02:46:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2020-01-29; bh=BvKQ+4rje6Vv4d5nG5NeVQcTFzmuWKNZ/3wRAXhWw2M=; b=EzH7esSvbtvT0+QGm+ga3TzUIFbxdcUfBxXfi69LFXBuCqviu756T6D+smFmaL1etCJn Aww+GB3qf2FzsZLRJxYxJqjbh0bqm68K720y7ZDk5xri/jq9Sy6Blf7jRkIRkmYs5mKu GzhvQ0JWii7bxAKCOI55uk2M4WPVRbPVZzS1zXP0PAVx9bvIBUEnhdaq7SsPoudsqc7/ 8l8Vo3AL56tgMtzq9CcRPhop02HGKTAxvrvux0fHYqeUkxRbmYdtAuugL82AXE8Eeib2 IlYZsGYHT7wRSTbtxF9tDX1qv/bKzJFfyKIHnPdJSix+acSt5UmZnOAk2Z+9qgAYLY7S uw== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2130.oracle.com with ESMTP id 360kg1sb89-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Jan 2021 02:46:43 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10D2kTdn051239; Wed, 13 Jan 2021 02:46:42 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 360kf6mnn1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Jan 2021 02:46:42 +0000 Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 10D2kfEN012996; Wed, 13 Jan 2021 02:46:41 GMT Received: from nsvm-sadhukhan.osdevelopmeniad.oraclevcn.com (/100.100.230.216) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 12 Jan 2021 18:46:41 -0800 From: Krish Sadhukhan To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, jmattson@google.com, seanjc@google.com Subject: [PATCH 1/3] KVM: nSVM: Check addresses of MSR and IO bitmap Date: Wed, 13 Jan 2021 02:46:31 +0000 Message-Id: <20210113024633.8488-2-krish.sadhukhan@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210113024633.8488-1-krish.sadhukhan@oracle.com> References: <20210113024633.8488-1-krish.sadhukhan@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 mlxlogscore=999 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101130014 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 clxscore=1015 impostorscore=0 spamscore=0 priorityscore=1501 mlxscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101130014 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org According to section "Canonicalization and Consistency Checks" in APM vol 2, the following guest state is illegal: "The MSR or IOIO intercept tables extend to a physical address that is greater than or equal to the maximum supported physical address." Also check that these addresses are aligned on page boundary. Signed-off-by: Krish Sadhukhan --- arch/x86/kvm/svm/nested.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index cb4c6ee10029..389a8108ddb5 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -211,8 +211,11 @@ static bool svm_get_nested_state_pages(struct kvm_vcpu *vcpu) return true; } -static bool nested_vmcb_check_controls(struct vmcb_control_area *control) +static bool nested_vmcb_check_controls(struct vcpu_svm *svm, + struct vmcb_control_area *control) { + int maxphyaddr; + if ((vmcb_is_intercept(control, INTERCEPT_VMRUN)) == 0) return false; @@ -223,6 +226,14 @@ static bool nested_vmcb_check_controls(struct vmcb_control_area *control) !npt_enabled) return false; + maxphyaddr = cpuid_maxphyaddr(&svm->vcpu); + if (!IS_ALIGNED(control->msrpm_base_pa, PAGE_SIZE) || + control->msrpm_base_pa >> maxphyaddr) + return false; + if (!IS_ALIGNED(control->iopm_base_pa, PAGE_SIZE) || + control->iopm_base_pa >> maxphyaddr) + return false; + return true; } @@ -258,7 +269,7 @@ static bool nested_vmcb_checks(struct vcpu_svm *svm, struct vmcb *vmcb12) if (!kvm_is_valid_cr4(&svm->vcpu, vmcb12->save.cr4)) return false; - return nested_vmcb_check_controls(&vmcb12->control); + return nested_vmcb_check_controls(svm, &vmcb12->control); } static void load_nested_vmcb_control(struct vcpu_svm *svm, @@ -1173,7 +1184,7 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu, goto out_free; ret = -EINVAL; - if (!nested_vmcb_check_controls(ctl)) + if (!nested_vmcb_check_controls(svm, ctl)) goto out_free; /* From patchwork Wed Jan 13 02:46:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krish Sadhukhan X-Patchwork-Id: 12015649 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=-19.0 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, UNPARSEABLE_RELAY,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 BD589C433E0 for ; Wed, 13 Jan 2021 02:49:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7E1CE2311F for ; Wed, 13 Jan 2021 02:49:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728602AbhAMCt2 (ORCPT ); Tue, 12 Jan 2021 21:49:28 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:44020 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725601AbhAMCt1 (ORCPT ); Tue, 12 Jan 2021 21:49:27 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10D2iQIe069762; Wed, 13 Jan 2021 02:48:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2020-01-29; bh=PsWu26ET1Aroe/GiEox5JHJTetUd/Z+jgu1B15egZvs=; b=r7ozzFYd8TAYnnaAzH8KgsgkgSS1V8kfeYlclk+19pd2OgkeDdnvcPZKXW3iua21vzV1 x197GhBF6ifkWXP1Y15drluUgkjZ9of0EYTX2K2QPuLhooQt4O2z17gOqvLq5UDQEk8r MBJiKN2Oq5P9JewGYeCbCmSYtyxF9rsPwUitfNsWh5XABnGibVACjoOFM6TkyKljgUSA 0UWxLMM9hh0TEIaiibQAtNUXmzo68ln+rd/rJShmqvwDu+HYbo9Mb3QHcgNXnxe0ti9/ 9Azexpn7UN/FgYwubgJj6doTwejP/4iqigj3jE72O55V6C3VMvo46yAGTic/BfUARW/k DA== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by aserp2130.oracle.com with ESMTP id 360kg1sbb1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Jan 2021 02:48:43 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10D2k4Rg147683; Wed, 13 Jan 2021 02:46:43 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserp3030.oracle.com with ESMTP id 360keytnm2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Jan 2021 02:46:42 +0000 Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 10D2kfFC006720; Wed, 13 Jan 2021 02:46:41 GMT Received: from nsvm-sadhukhan.osdevelopmeniad.oraclevcn.com (/100.100.230.216) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 12 Jan 2021 18:46:41 -0800 From: Krish Sadhukhan To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, jmattson@google.com, seanjc@google.com Subject: [PATCH 2/3] Test: nSVM: Test MSR and IO bitmap address Date: Wed, 13 Jan 2021 02:46:32 +0000 Message-Id: <20210113024633.8488-3-krish.sadhukhan@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210113024633.8488-1-krish.sadhukhan@oracle.com> References: <20210113024633.8488-1-krish.sadhukhan@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 malwarescore=0 suspectscore=0 adultscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101130014 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 clxscore=1015 impostorscore=0 spamscore=0 priorityscore=1501 mlxscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101130014 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org According to section "Canonicalization and Consistency Checks" in APM vol 2, the following guest state is illegal: "The MSR or IOIO intercept tables extend to a physical address that is greater than or equal to the maximum supported physical address." Also test that these addresses are aligned on page boundary. Signed-off-by: Krish Sadhukhan --- x86/svm_tests.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/x86/svm_tests.c b/x86/svm_tests.c index dc86efd..929a3e1 100644 --- a/x86/svm_tests.c +++ b/x86/svm_tests.c @@ -2304,6 +2304,43 @@ static void test_dr(void) vmcb->save.dr7 = dr_saved; } +extern u8 msr_bitmap_area[]; +extern u8 io_bitmap_area[]; + +#define TEST_BITMAP_ADDR(prot_type, bitmap_addr, msg) { \ + vmcb->control.intercept = 1ULL << prot_type; \ + addr_unalign = virt_to_phys(bitmap_addr); \ + if (prot_type == INTERCEPT_MSR_PROT) \ + vmcb->control.msrpm_base_pa = addr_unalign; \ + else \ + vmcb->control.iopm_base_pa = addr_unalign; \ + report(svm_vmrun() == SVM_EXIT_ERR, "Test %s address: %lx", msg,\ + addr_unalign); \ + vmcb->control.msrpm_base_pa = addr_spill_beyond_ram; \ + report(svm_vmrun() == SVM_EXIT_ERR, "Test %s address: %lx", msg,\ + addr_spill_beyond_ram); \ +} \ + +/* + * If the MSR or IOIO intercept table extends to a physical address that + * is greater than or equal to the maximum supported physical address, the + * guest state is illegal. + * + * [ APM vol 2] + */ +static void test_msrpm_iopm_bitmap_addrs(void) +{ + u64 addr_unalign; + u64 addr_spill_beyond_ram = + (u64)(((u64)1 << cpuid_maxphyaddr()) - 4096); + + /* MSR bitmap address */ + TEST_BITMAP_ADDR(INTERCEPT_MSR_PROT, msr_bitmap_area, "MSRPM"); + + /* MSR bitmap address */ + TEST_BITMAP_ADDR(INTERCEPT_IOIO_PROT, io_bitmap_area, "IOPM"); +} + static void svm_guest_state_test(void) { test_set_guest(basic_guest_main); @@ -2313,6 +2350,7 @@ static void svm_guest_state_test(void) test_cr3(); test_cr4(); test_dr(); + test_msrpm_iopm_bitmap_addrs(); } struct svm_test svm_tests[] = { From patchwork Wed Jan 13 02:46:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krish Sadhukhan X-Patchwork-Id: 12015647 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=-19.0 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, UNPARSEABLE_RELAY,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 076E3C43219 for ; Wed, 13 Jan 2021 02:49:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B465F2311F for ; Wed, 13 Jan 2021 02:49:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728690AbhAMCt2 (ORCPT ); Tue, 12 Jan 2021 21:49:28 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:44022 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728278AbhAMCt1 (ORCPT ); Tue, 12 Jan 2021 21:49:27 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10D2iAc4069459; Wed, 13 Jan 2021 02:48:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2020-01-29; bh=FCHR/kvHlyKbKvUjMwXY42SxTz0rqXup5nfnNHN3YTM=; b=BgyQW4gc3dRBXE1sMOpBSs/S/XpFketyh2JP1jqhxsDlxRNgvRrb75vG6qxtfdyuzoka dPFeM3rlmI6T6h6yvqR9wdZ/xZt2q+Z73vwiugl/yWFI9dajdPu0S9XsOsC5roBqE2yX F6fmDye31R++kQuYGGKBe65ga8tzVIFAIGQtoEZKI2gajmhXGWW54FM4oB5jHHwUtNtO jOysS+bWVgiGMCCl7Gpl3WlH25eulXlXd4QIYtTPucsagg7QfM7jhv2KHANDRHfe/X3/ iC7GwZhLlHUOzjTe05K2zGu4+VYZHcU+VzzM1+VXnqoxDC3Ez9JxMFURUQneasAvdIQb AA== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2130.oracle.com with ESMTP id 360kg1sbb2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Jan 2021 02:48:43 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10D2jom7171977; Wed, 13 Jan 2021 02:46:43 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserp3020.oracle.com with ESMTP id 360ke7jh0f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Jan 2021 02:46:43 +0000 Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 10D2kgkd006723; Wed, 13 Jan 2021 02:46:42 GMT Received: from nsvm-sadhukhan.osdevelopmeniad.oraclevcn.com (/100.100.230.216) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 12 Jan 2021 18:46:41 -0800 From: Krish Sadhukhan To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, jmattson@google.com, seanjc@google.com Subject: [PATCH 3/3] Test: SVM: Use ALIGN macro when aligning 'io_bitmap_area' Date: Wed, 13 Jan 2021 02:46:33 +0000 Message-Id: <20210113024633.8488-4-krish.sadhukhan@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210113024633.8488-1-krish.sadhukhan@oracle.com> References: <20210113024633.8488-1-krish.sadhukhan@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101130014 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 clxscore=1015 impostorscore=0 spamscore=0 priorityscore=1501 mlxscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101130014 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Since the macro is available and we already use it for MSR bitmap table, use it for aligning IO bitmap table also. Signed-off-by: Krish Sadhukhan --- x86/svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/x86/svm.c b/x86/svm.c index a1808c7..846cf2a 100644 --- a/x86/svm.c +++ b/x86/svm.c @@ -298,7 +298,7 @@ static void setup_svm(void) wrmsr(MSR_EFER, rdmsr(MSR_EFER) | EFER_SVME); wrmsr(MSR_EFER, rdmsr(MSR_EFER) | EFER_NX); - io_bitmap = (void *) (((ulong)io_bitmap_area + 4095) & ~4095); + io_bitmap = (void *) ALIGN((ulong)io_bitmap_area, PAGE_SIZE); msr_bitmap = (void *) ALIGN((ulong)msr_bitmap_area, PAGE_SIZE);