From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755384AbdKBIbu (ORCPT ); Thu, 2 Nov 2017 04:31:50 -0400 Received: from mail-pg0-f66.google.com ([74.125.83.66]:52538 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752547AbdKBIbq (ORCPT ); Thu, 2 Nov 2017 04:31:46 -0400 X-Google-Smtp-Source: ABhQp+T9ddep/uAQU9WMIEftQSgvtqqVczTK2KWIfE6y1S5Le393hIGbU5b/Ed8QlsX7e83SyEqt4w== From: Wanpeng Li X-Google-Original-From: Wanpeng Li To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Wanpeng Li , Jim Mattson Subject: [PATCH v3 2/3] KVM: nVMX: Validate the IA32_BNDCFGS on nested VM-entry Date: Thu, 2 Nov 2017 01:31:38 -0700 Message-Id: <1509611499-9401-2-git-send-email-wanpeng.li@hotmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1509611499-9401-1-git-send-email-wanpeng.li@hotmail.com> References: <1509611499-9401-1-git-send-email-wanpeng.li@hotmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wanpeng Li According to the SDM, if the "load IA32_BNDCFGS" VM-entry controls is 1, the following checks are performed on the field for the IA32_BNDCFGS MSR: - Bits reserved in the IA32_BNDCFGS MSR must be 0. - The linear address in bits 63:12 must be canonical. Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Jim Mattson Signed-off-by: Wanpeng Li --- arch/x86/kvm/vmx.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e6c8ffa..f29f57d 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10805,6 +10805,13 @@ static int check_vmentry_postreqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, return 1; } + if (kvm_mpx_supported() && + (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS)) { + if (is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) || + (vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)) + return 1; + } + return 0; } -- 2.7.4