From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0DFDC2D0DB for ; Wed, 29 Jan 2020 23:48:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8122E20716 for ; Wed, 29 Jan 2020 23:48:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727306AbgA2Xso (ORCPT ); Wed, 29 Jan 2020 18:48:44 -0500 Received: from mga06.intel.com ([134.134.136.31]:46690 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726996AbgA2Xqp (ORCPT ); Wed, 29 Jan 2020 18:46:45 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jan 2020 15:46:43 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,379,1574150400"; d="scan'208";a="309551698" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.202]) by orsmga001.jf.intel.com with ESMTP; 29 Jan 2020 15:46:43 -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 02/26] KVM: x86: Take an unsigned 32-bit int for has_emulated_msr()'s index Date: Wed, 29 Jan 2020 15:46:16 -0800 Message-Id: <20200129234640.8147-3-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200129234640.8147-1-sean.j.christopherson@intel.com> References: <20200129234640.8147-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Take a u32 for the index in has_emulated_msr() to match hardware, which treats MSR indices as unsigned 32-bit values. Functionally, taking a signed int doesn't cause problems with the current code base, but could theoretically cause problems with 32-bit KVM, e.g. if the index were checked via a less-than statement, which would evaluate incorrectly for MSR indices with bit 31 set. Signed-off-by: Sean Christopherson --- arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/svm.c | 2 +- arch/x86/kvm/vmx/vmx.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 77d206a93658..5c2ad3fa0980 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1050,7 +1050,7 @@ struct kvm_x86_ops { int (*hardware_setup)(void); /* __init */ void (*hardware_unsetup)(void); /* __exit */ bool (*cpu_has_accelerated_tpr)(void); - bool (*has_emulated_msr)(int index); + bool (*has_emulated_msr)(u32 index); void (*cpuid_update)(struct kvm_vcpu *vcpu); struct kvm *(*vm_alloc)(void); diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index bf0556588ad0..a7b944a3a0e2 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5985,7 +5985,7 @@ static bool svm_cpu_has_accelerated_tpr(void) return false; } -static bool svm_has_emulated_msr(int index) +static bool svm_has_emulated_msr(u32 index) { switch (index) { case MSR_IA32_MCG_EXT_CTL: diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 1419c53aed16..f5bb1ad2e9fa 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6274,7 +6274,7 @@ static void vmx_handle_exit_irqoff(struct kvm_vcpu *vcpu, *exit_fastpath = handle_fastpath_set_msr_irqoff(vcpu); } -static bool vmx_has_emulated_msr(int index) +static bool vmx_has_emulated_msr(u32 index) { switch (index) { case MSR_IA32_SMBASE: -- 2.24.1