From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755423Ab0KXSS7 (ORCPT ); Wed, 24 Nov 2010 13:18:59 -0500 Received: from db3ehsobe006.messaging.microsoft.com ([213.199.154.144]:2467 "EHLO DB3EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755194Ab0KXSS4 (ORCPT ); Wed, 24 Nov 2010 13:18:56 -0500 X-SpamScore: -2 X-BigFish: VPS-2(zzbb2cKzz1202hzz8275bhz32i691h668h67dh685h62h) X-Spam-TCS-SCL: 1:0 X-Forefront-Antispam-Report: KIP:(null);UIP:(null);IPVD:NLI;H:ausb3twp01.amd.com;RD:none;EFVD:NLI X-WSS-ID: 0LCEIUZ-01-380-02 X-M-MSG: From: Joerg Roedel To: Avi Kivity , Marcelo Tosatti CC: , , Joerg Roedel Subject: [PATCH 4/9] KVM: SVM: Add intercept checks for descriptor table accesses Date: Wed, 24 Nov 2010 19:18:30 +0100 Message-ID: <1290622715-8382-5-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1290622715-8382-1-git-send-email-joerg.roedel@amd.com> References: <1290622715-8382-1-git-send-email-joerg.roedel@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds checks for accesses to the descriptor table base registers to the intruction emulator path of KVM. Signed-off-by: Joerg Roedel --- arch/x86/kvm/svm.c | 28 ++++++++++++++++++++++++++++ 1 files changed, 28 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 16ff569..035c5b5 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3636,12 +3636,40 @@ static int svm_insn_intercepted(struct kvm_vcpu *vcpu, goto out; switch (c->b) { + case 0x00: + switch (c->modrm_reg) { + case 0x00: /* SLDT */ + vmcb->control.exit_code = SVM_EXIT_LDTR_READ; + break; + case 0x01: /* STR */ + vmcb->control.exit_code = SVM_EXIT_TR_READ; + break; + case 0x02: /* LLDT */ + vmcb->control.exit_code = SVM_EXIT_LDTR_WRITE; + break; + case 0x03: /* LTR */ + vmcb->control.exit_code = SVM_EXIT_TR_WRITE; + break; + } + break; case 0x01: /* 0x0f 0x01 and modrm_mod == 3 encodes special instructions */ if (c->modrm_mod == 3) break; switch (c->modrm_reg) { + case 0x00: /* SGDT */ + vmcb->control.exit_code = SVM_EXIT_GDTR_READ; + break; + case 0x01: /* SIDT */ + vmcb->control.exit_code = SVM_EXIT_IDTR_READ; + break; + case 0x02: /* LGDT */ + vmcb->control.exit_code = SVM_EXIT_GDTR_WRITE; + break; + case 0x03: /* LIDT */ + vmcb->control.exit_code = SVM_EXIT_IDTR_WRITE; + break; case 0x04: /* SMSW */ vmcb->control.exit_code = SVM_EXIT_READ_CR0; break; -- 1.7.1