linux-kernel - [PATCH v2 0/3] MSR_IA32_ARCH

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Message-Id: <20230524061634.54141-1-chao.gao@intel.com>
Date:   Wed, 24 May 2023 14:16:30 +0800
From:   Chao Gao <chao.gao@...el.com>
To:     kvm@...r.kernel.org, x86@...nel.org
Cc:     xiaoyao.li@...el.com, Chao Gao <chao.gao@...el.com>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Juergen Gross <jgross@...e.com>,
        Kim Phillips <kim.phillips@....com>,
        linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Sean Christopherson <seanjc@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 0/3] MSR_IA32_ARCH_CAPABILITIES cleanups

Do some cleanups about MSR_IA32_ARCH_CAPABILITIES in KVM e.g, fix stale
comments, elimite open-coded MSR reads, track features that can be exposed to
guests to avoid computing them runtime. They are found when reading the code.

No functional change intented.

Changes from v1 -> v2:
1. toggle ARCH_CAP_SKIP_VMENTRY_L1DFLUSH bit when l1tf mitigation state is
   changed by module param. [Xiaoyao, Sean]
2. add more cleanups (patch 2/3)


Chao Gao (3):
  KVM: x86: Track supported ARCH_CAPABILITIES in kvm_caps
  KVM: x86: Correct the name for skipping VMENTER l1d flush
  x86/cpu, KVM: Use helper function to read MSR_IA32_ARCH_CAPABILITIES

 arch/x86/kernel/cpu/common.c |  1 +
 arch/x86/kvm/vmx/vmx.c       | 44 +++++++++++++++++++++++-------------
 arch/x86/kvm/x86.c           | 16 +++++--------
 arch/x86/kvm/x86.h           |  1 +
 4 files changed, 36 insertions(+), 26 deletions(-)


base-commit: b9846a698c9aff4eb2214a06ac83638ad098f33f
-- 
2.40.0