linux-kernel - Re: [PATCH v2 00/50] KVM: Rework kvm

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Date:   Fri, 2 Dec 2022 16:02:08 +0800
From:   Chao Gao <chao.gao@...el.com>
To:     Sean Christopherson <seanjc@...gle.com>
CC:     Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
        "Huacai Chen" <chenhuacai@...nel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        Anup Patel <anup@...infault.org>,
        "Paul Walmsley" <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        "Claudio Imbrenda" <imbrenda@...ux.ibm.com>,
        Matthew Rosato <mjrosato@...ux.ibm.com>,
        Eric Farman <farman@...ux.ibm.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Paul Durrant <paul@....org>,
        "James Morse" <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Atish Patra <atishp@...shpatra.org>,
        "David Hildenbrand" <david@...hat.com>, <kvm@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kvmarm@...ts.linux.dev>,
        <kvmarm@...ts.cs.columbia.edu>, <linux-mips@...r.kernel.org>,
        <linuxppc-dev@...ts.ozlabs.org>, <kvm-riscv@...ts.infradead.org>,
        <linux-riscv@...ts.infradead.org>, <linux-s390@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Yuan Yao <yuan.yao@...el.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Isaku Yamahata <isaku.yamahata@...el.com>,
        Philippe Mathieu-Daudé <philmd@...aro.org>,
        Fabiano Rosas <farosas@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Kai Huang <kai.huang@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v2 00/50] KVM: Rework kvm_init() and hardware enabling

On Wed, Nov 30, 2022 at 11:08:44PM +0000, Sean Christopherson wrote:
>The main theme of this series is to kill off kvm_arch_init(),
>kvm_arch_hardware_(un)setup(), and kvm_arch_check_processor_compat(), which
>all originated in x86 code from way back when, and needlessly complicate
>both common KVM code and architecture code.  E.g. many architectures don't
>mark functions/data as __init/__ro_after_init purely because kvm_init()
>isn't marked __init to support x86's separate vendor modules.

Applied this series and verified that an attempt to online incompatible
CPUs (no VMX support) when some VMs are running will fail.