From patchwork Sat Feb 1 18:51:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11361305 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7C854921 for ; Sat, 1 Feb 2020 18:55:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 64CDE20679 for ; Sat, 1 Feb 2020 18:55:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727644AbgBASzR (ORCPT ); Sat, 1 Feb 2020 13:55:17 -0500 Received: from mga02.intel.com ([134.134.136.20]:11279 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727191AbgBASwb (ORCPT ); Sat, 1 Feb 2020 13:52:31 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Feb 2020 10:52:27 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,390,1574150400"; d="scan'208";a="248075520" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.202]) by orsmga002.jf.intel.com with ESMTP; 01 Feb 2020 10:52:25 -0800 From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 30/61] KVM: x86: Handle MPX CPUID adjustment in VMX code Date: Sat, 1 Feb 2020 10:51:47 -0800 Message-Id: <20200201185218.24473-31-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200201185218.24473-1-sean.j.christopherson@intel.com> References: <20200201185218.24473-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Move the MPX CPUID adjustments into VMX to eliminate an instance of the undesirable "unsigned f_* = *_supported ? F(*) : 0" pattern in the common CPUID handling code. Note, VMX must manually check for kernel support via boot_cpu_has(X86_FEATURE_MPX). No functional change intended. Signed-off-by: Sean Christopherson Reviewed-by: Vitaly Kuznetsov --- arch/x86/kvm/cpuid.c | 3 +-- arch/x86/kvm/vmx/vmx.c | 14 ++++++++++++-- 2 files changed, 13 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index cb5870a323cc..09e24d1d731c 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -340,7 +340,6 @@ static int __do_cpuid_func_emulated(struct kvm_cpuid_array *array, u32 func) static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry) { unsigned f_invpcid = kvm_x86_ops->invpcid_supported() ? F(INVPCID) : 0; - unsigned f_mpx = kvm_mpx_supported() ? F(MPX) : 0; unsigned f_umip = kvm_x86_ops->umip_emulated() ? F(UMIP) : 0; unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0; unsigned f_la57; @@ -349,7 +348,7 @@ static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry) /* cpuid 7.0.ebx */ const u32 kvm_cpuid_7_0_ebx_x86_features = F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) | - F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | f_mpx | F(RDSEED) | + F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | 0 /*MPX*/ | F(RDSEED) | F(ADX) | F(SMAP) | F(AVX512IFMA) | F(AVX512F) | F(AVX512PF) | F(AVX512ER) | F(AVX512CD) | F(CLFLUSHOPT) | F(CLWB) | F(AVX512DQ) | F(SHA_NI) | F(AVX512BW) | F(AVX512VL) | f_intel_pt; diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 3ff830e2258e..143193fc178e 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7106,8 +7106,18 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) static void vmx_set_supported_cpuid(struct kvm_cpuid_entry2 *entry) { - if (entry->function == 1 && nested) - entry->ecx |= feature_bit(VMX); + switch (entry->function) { + case 0x1: + if (nested) + cpuid_entry_set(entry, X86_FEATURE_VMX); + break; + case 0x7: + if (boot_cpu_has(X86_FEATURE_MPX) && kvm_mpx_supported()) + cpuid_entry_set(entry, X86_FEATURE_MPX); + break; + default: + break; + } } static void vmx_request_immediate_exit(struct kvm_vcpu *vcpu)