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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 5FD8DC433E0 for ; Tue, 26 Jan 2021 18:58:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24DA022A84 for ; Tue, 26 Jan 2021 18:58:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389845AbhAZRH3 (ORCPT ); Tue, 26 Jan 2021 12:07:29 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:43804 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388426AbhAZJ1D (ORCPT ); Tue, 26 Jan 2021 04:27:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611653123; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=psqoQb8M1ZbviHk/oEAqOvlNRFhfySafJPPh42D8Lw4=; b=ay3NRozza3vwriETa+Q9bIiGvOmgLHqxpJGOjFSvtisUfQZ83C5omw+XiGbv0H66qY4XPW dkTSMAo4EjVRZhlXY+rNtWgV4SOefKoTjGWDk4wyseui65Hnay5rVRYBpsYns/MrEINtsM A/X+gg/Y9YpvgLVbjroPUU6BboRsnHE= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-403-mIcOVE8GP9eo2QUNwwWZ3A-1; Tue, 26 Jan 2021 04:25:22 -0500 X-MC-Unique: mIcOVE8GP9eo2QUNwwWZ3A-1 Received: by mail-ed1-f72.google.com with SMTP id u17so9125709edi.18 for ; Tue, 26 Jan 2021 01:25:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=psqoQb8M1ZbviHk/oEAqOvlNRFhfySafJPPh42D8Lw4=; b=oMrITW8fwJy3dOsKIEe2ddt4ycJJ8wM1yGOV5yUCldb3BUFRlCnHENxG3h9IDfQFIh 0X0m/pKNVY7OhJ5kE1sV0jt1e16YKH9rT5DqI/pbAkFNkjE0SuUMDwNGGfo34aIXkoN6 6efyKZWv8E+eByBIKkTBv1M3apTtm3krvdS434mUOlafxNHDMC5XruIzPfZoYN/cjDpA 9dszeWu23w4G0lGCDvmO1c6FlO0SzE7na+jzNBjPfwv6Hf6PZlGtvElCG0qeuy/cowba Nn0FpNArXOaOvT1u4CK9XpvZHTsSsnLRFSU3JdWlvD13Eg+gxaYEto/WFcF5G7jjRgcu nzxQ== X-Gm-Message-State: AOAM531bbL7nnKs3naGMCQfMpwJTNPIj0XfjjkGcBEmp31Vo7gLPLKr5 5I85AVE+RPkwzkESQKXDWfZN/8DsEjwbNpO4QzlbO2fKXAorqetIUMnk1wZ4eY9a6hSCuCGeITB Mb5isn3XJNUgW X-Received: by 2002:a05:6402:22db:: with SMTP id dm27mr3928101edb.379.1611653120905; Tue, 26 Jan 2021 01:25:20 -0800 (PST) X-Google-Smtp-Source: ABdhPJzu8Mz662tDQlLDu7zmLZYNOETmSPQR4ZpjatODnRxEFNL9lQpsbL3OLGnygCaYP90+CIh/Ew== X-Received: by 2002:a05:6402:22db:: with SMTP id dm27mr3928090edb.379.1611653120709; Tue, 26 Jan 2021 01:25:20 -0800 (PST) Received: from ?IPv6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id v25sm9550672ejw.21.2021.01.26.01.25.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 26 Jan 2021 01:25:19 -0800 (PST) Subject: Re: [RESEND v13 01/10] KVM: x86: Move common set/get handler of MSR_IA32_DEBUGCTLMSR to VMX To: Like Xu , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel Cc: Ingo Molnar , Thomas Gleixner , Borislav Petkov , "H . Peter Anvin" , ak@linux.intel.com, wei.w.wang@intel.com, kan.liang@intel.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210108013704.134985-1-like.xu@linux.intel.com> <20210108013704.134985-2-like.xu@linux.intel.com> From: Paolo Bonzini Message-ID: Date: Tue, 26 Jan 2021 10:25:18 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20210108013704.134985-2-like.xu@linux.intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 08/01/21 02:36, Like Xu wrote: > SVM already has specific handlers of MSR_IA32_DEBUGCTLMSR in the > svm_get/set_msr, so the x86 common part can be safely moved to VMX. > > Add vmx_supported_debugctl() to refactor the throwing logic of #GP. > > Signed-off-by: Like Xu > Reviewed-by: Andi Kleen > --- > arch/x86/kvm/vmx/capabilities.h | 5 +++++ > arch/x86/kvm/vmx/vmx.c | 19 ++++++++++++++++--- > arch/x86/kvm/x86.c | 13 ------------- > 3 files changed, 21 insertions(+), 16 deletions(-) > > diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h > index 3a1861403d73..a58cf3655351 100644 > --- a/arch/x86/kvm/vmx/capabilities.h > +++ b/arch/x86/kvm/vmx/capabilities.h > @@ -378,4 +378,9 @@ static inline u64 vmx_get_perf_capabilities(void) > return PMU_CAP_FW_WRITES; > } > > +static inline u64 vmx_supported_debugctl(void) > +{ > + return DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF; > +} > + > #endif /* __KVM_X86_VMX_CAPS_H */ > diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c > index 2af05d3b0590..23b46327527e 100644 > --- a/arch/x86/kvm/vmx/vmx.c > +++ b/arch/x86/kvm/vmx/vmx.c > @@ -1924,6 +1924,9 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) > !guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP)) > return 1; > goto find_uret_msr; > + case MSR_IA32_DEBUGCTLMSR: > + msr_info->data = 0; > + break; > default: > find_uret_msr: > msr = vmx_find_uret_msr(vmx, msr_info->index); > @@ -2002,9 +2005,19 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) > VM_EXIT_SAVE_DEBUG_CONTROLS) > get_vmcs12(vcpu)->guest_ia32_debugctl = data; > > - ret = kvm_set_msr_common(vcpu, msr_info); > - break; > - > + if (!data) { > + /* We support the non-activated case already */ > + return 0; > + } else if (data & ~vmx_supported_debugctl()) { > + /* > + * Values other than LBR and BTF are vendor-specific, > + * thus reserved and should throw a #GP. > + */ > + return 1; > + } > + vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", > + __func__, data); > + return 0; > case MSR_IA32_BNDCFGS: > if (!kvm_mpx_supported() || > (!msr_info->host_initiated && > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 0287840b93e0..c765fd72a66c 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -3063,18 +3063,6 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) > return 1; > } > break; > - case MSR_IA32_DEBUGCTLMSR: > - if (!data) { > - /* We support the non-activated case already */ > - break; > - } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { > - /* Values other than LBR and BTF are vendor-specific, > - thus reserved and should throw a #GP */ > - return 1; > - } else if (report_ignored_msrs) > - vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", > - __func__, data); > - break; > case 0x200 ... 0x2ff: > return kvm_mtrr_set_msr(vcpu, msr, data); > case MSR_IA32_APICBASE: > @@ -3347,7 +3335,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) > switch (msr_info->index) { > case MSR_IA32_PLATFORM_ID: > case MSR_IA32_EBL_CR_POWERON: > - case MSR_IA32_DEBUGCTLMSR: > case MSR_IA32_LASTBRANCHFROMIP: > case MSR_IA32_LASTBRANCHTOIP: > case MSR_IA32_LASTINTFROMIP: > Queued, thanks. Paolo