Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752719AbaAUTCF (ORCPT ); Tue, 21 Jan 2014 14:02:05 -0500 Received: from mga09.intel.com ([134.134.136.24]:14879 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752586AbaAUTCC convert rfc822-to-8bit (ORCPT ); Tue, 21 Jan 2014 14:02:02 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,696,1384329600"; d="scan'208,223";a="442418493" From: "Liu, Jinsong" To: Paolo Bonzini CC: "gleb@redhat.com" , "hpa@zytor.com" , "kvm@vger.kernel.org" , "qemu-devel@nongnu.org" , "linux-kernel@vger.kernel.org" , "Ren, Qiaowei" Subject: [PATCH v3 2/4] KVM/X86: Intel MPX vmx and msr handle Thread-Topic: [PATCH v3 2/4] KVM/X86: Intel MPX vmx and msr handle Thread-Index: Ac8W2zekrjmsgAfhTzqK95ktXW3CSg== Date: Tue, 21 Jan 2014 19:01:41 +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] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >From 31e68d752ac395dc6b65e6adf45be5324e92cdc8 Mon Sep 17 00:00:00 2001 From: Liu Jinsong Date: Fri, 13 Dec 2013 02:32:43 +0800 Subject: [PATCH v3 2/4] KVM/X86: Intel MPX vmx and msr handle This patch handle vmx and msr of Intel MPX feature. Signed-off-by: Xudong Hao Signed-off-by: Liu Jinsong --- arch/x86/include/asm/vmx.h | 2 ++ arch/x86/include/uapi/asm/msr-index.h | 1 + arch/x86/kvm/vmx.c | 12 ++++++++++-- 3 files changed, 13 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 966502d..1bf4681 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -85,6 +85,7 @@ #define VM_EXIT_SAVE_IA32_EFER 0x00100000 #define VM_EXIT_LOAD_IA32_EFER 0x00200000 #define VM_EXIT_SAVE_VMX_PREEMPTION_TIMER 0x00400000 +#define VM_EXIT_CLEAR_BNDCFGS 0x00800000 #define VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR 0x00036dff @@ -95,6 +96,7 @@ #define VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL 0x00002000 #define VM_ENTRY_LOAD_IA32_PAT 0x00004000 #define VM_ENTRY_LOAD_IA32_EFER 0x00008000 +#define VM_ENTRY_LOAD_BNDCFGS 0x00010000 #define VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR 0x000011ff diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h index 37813b5..2a418c4 100644 --- a/arch/x86/include/uapi/asm/msr-index.h +++ b/arch/x86/include/uapi/asm/msr-index.h @@ -294,6 +294,7 @@ #define MSR_SMI_COUNT 0x00000034 #define MSR_IA32_FEATURE_CONTROL 0x0000003a #define MSR_IA32_TSC_ADJUST 0x0000003b +#define MSR_IA32_BNDCFGS 0x00000d90 #define FEATURE_CONTROL_LOCKED (1<<0) #define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX (1<<1) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index b2fe1c2..6d7d9ad 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -439,6 +439,7 @@ struct vcpu_vmx { #endif int gs_ldt_reload_needed; int fs_reload_needed; + u64 msr_host_bndcfgs; } host_state; struct { int vm86_active; @@ -1647,6 +1648,8 @@ static void vmx_save_host_state(struct kvm_vcpu *vcpu) if (is_long_mode(&vmx->vcpu)) wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); #endif + if (boot_cpu_has(X86_FEATURE_MPX)) + rdmsrl(MSR_IA32_BNDCFGS, vmx->host_state.msr_host_bndcfgs); for (i = 0; i < vmx->save_nmsrs; ++i) kvm_set_shared_msr(vmx->guest_msrs[i].index, vmx->guest_msrs[i].data, @@ -1684,6 +1687,8 @@ static void __vmx_load_host_state(struct vcpu_vmx *vmx) #ifdef CONFIG_X86_64 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); #endif + if (vmx->host_state.msr_host_bndcfgs) + wrmsrl(MSR_IA32_BNDCFGS, vmx->host_state.msr_host_bndcfgs); /* * If the FPU is not active (through the host task or * the guest vcpu), then restore the cr0.TS bit. @@ -2800,7 +2805,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; #endif opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT | - VM_EXIT_ACK_INTR_ON_EXIT; + VM_EXIT_ACK_INTR_ON_EXIT | VM_EXIT_CLEAR_BNDCFGS; if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, &_vmexit_control) < 0) return -EIO; @@ -2817,7 +2822,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) _pin_based_exec_control &= ~PIN_BASED_POSTED_INTR; min = 0; - opt = VM_ENTRY_LOAD_IA32_PAT; + opt = VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_BNDCFGS; if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, &_vmentry_control) < 0) return -EIO; @@ -8636,6 +8641,9 @@ static int __init vmx_init(void) vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); + if (boot_cpu_has(X86_FEATURE_MPX)) + vmx_disable_intercept_for_msr(MSR_IA32_BNDCFGS, true); + memcpy(vmx_msr_bitmap_legacy_x2apic, vmx_msr_bitmap_legacy, PAGE_SIZE); memcpy(vmx_msr_bitmap_longmode_x2apic, -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/