From patchwork Fri Feb 21 17:57:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liu, Jinsong" X-Patchwork-Id: 322980 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id A23972C0331 for ; Sat, 22 Feb 2014 04:58:15 +1100 (EST) Received: from localhost ([::1]:46195 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGuMW-0000hj-G7 for incoming@patchwork.ozlabs.org; Fri, 21 Feb 2014 12:58:12 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55239) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGuMB-0000Pk-B0 for qemu-devel@nongnu.org; Fri, 21 Feb 2014 12:57:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WGuM6-0002rn-Ad for qemu-devel@nongnu.org; Fri, 21 Feb 2014 12:57:51 -0500 Received: from mga11.intel.com ([192.55.52.93]:45897) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGuM6-0002rj-3e for qemu-devel@nongnu.org; Fri, 21 Feb 2014 12:57:46 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP; 21 Feb 2014 09:57:24 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,520,1389772800"; d="scan'208,223";a="479267464" Received: from fmsmsx107.amr.corp.intel.com ([10.19.9.54]) by fmsmga001.fm.intel.com with ESMTP; 21 Feb 2014 09:57:23 -0800 Received: from shsmsx104.ccr.corp.intel.com (10.239.4.70) by FMSMSX107.amr.corp.intel.com (10.19.9.54) with Microsoft SMTP Server (TLS) id 14.3.123.3; Fri, 21 Feb 2014 09:57:23 -0800 Received: from shsmsx101.ccr.corp.intel.com ([169.254.1.26]) by SHSMSX104.ccr.corp.intel.com ([169.254.5.227]) with mapi id 14.03.0123.003; Sat, 22 Feb 2014 01:57:16 +0800 From: "Liu, Jinsong" To: Paolo Bonzini Thread-Topic: [PATCH v4 3/3] KVM: x86: Enable Intel MPX for guest Thread-Index: Ac8vLlqhffa0mA48RJ+9cL55JkIR2w== Date: Fri, 21 Feb 2014 17:57:15 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.93 Cc: "qemu-devel@nongnu.org" , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" , "gleb@redhat.com" , "hpa@zytor.com" Subject: [Qemu-devel] [PATCH v4 3/3] KVM: x86: Enable Intel MPX for guest X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From 8b3a3b1f08c166e0c2cdc6162e6fa95d9c7ad2ec Mon Sep 17 00:00:00 2001 From: Liu Jinsong Date: Sat, 22 Feb 2014 08:53:27 +0800 Subject: [PATCH v4 3/3] KVM: x86: Enable Intel MPX for guest This patch enable Intel MPX feature to guest. Signed-off-by: Xudong Hao Signed-off-by: Liu Jinsong --- arch/x86/kvm/cpuid.c | 2 +- arch/x86/kvm/x86.c | 6 ++++++ arch/x86/kvm/x86.h | 3 ++- 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index b241325..b377d83 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -303,7 +303,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, /* cpuid 7.0.ebx */ const u32 kvm_supported_word9_x86_features = F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) | - F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | F(RDSEED) | + F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | F(MPX) | F(RDSEED) | F(ADX); /* all calls to cpuid_count() should be made on the same cpu */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 89e4e27..3570e71 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -599,6 +599,9 @@ int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) u64 old_xcr0 = vcpu->arch.xcr0; u64 valid_bits; + if (!kvm_x86_ops->mpx_supported || !kvm_x86_ops->mpx_supported()) + xcr0 &= ~(XSTATE_BNDREGS | XSTATE_BNDCSR); + /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ if (index != XCR_XFEATURE_ENABLED_MASK) return 1; @@ -616,6 +619,9 @@ int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) if (xcr0 & ~valid_bits) return 1; + if ((!(xcr0 & XSTATE_BNDREGS)) != (!(xcr0 & XSTATE_BNDCSR))) + return 1; + kvm_put_guest_xcr0(vcpu); vcpu->arch.xcr0 = xcr0; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 8da5823..392ecbf 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -122,7 +122,8 @@ int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, gva_t addr, void *val, unsigned int bytes, struct x86_exception *exception); -#define KVM_SUPPORTED_XCR0 (XSTATE_FP | XSTATE_SSE | XSTATE_YMM) +#define KVM_SUPPORTED_XCR0 (XSTATE_FP | XSTATE_SSE | XSTATE_YMM \ + | XSTATE_BNDREGS | XSTATE_BNDCSR) extern u64 host_xcr0; extern unsigned int min_timer_period_us;