linux-kernel - Re: [PATCH 25/44] KVM: s390: Do s390 specific init without bouncing through kvm

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Message-ID: <e2b21ebfec94bcc3d830a5c7f11837d6dedac652.camel@linux.ibm.com>
Date:   Mon, 07 Nov 2022 13:22:11 -0500
From:   Eric Farman <farman@...ux.ibm.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        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>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     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,
        Isaku Yamahata <isaku.yamahata@...el.com>,
        Fabiano Rosas <farosas@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Chao Gao <chao.gao@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Yuan Yao <yuan.yao@...el.com>
Subject: Re: [PATCH 25/44] KVM: s390: Do s390 specific init without bouncing
 through kvm_init()

On Wed, 2022-11-02 at 23:18 +0000, Sean Christopherson wrote:
> Move the guts of kvm_arch_init() into a new helper,
> __kvm_s390_init(),
> and invoke the new helper directly from kvm_s390_init() instead of
> bouncing through kvm_init().  Invoking kvm_arch_init() is the very
> first action performed by kvm_init(), i.e. this is a glorified nop.
> 
> Moving setup to __kvm_s390_init() will allow tagging more functions
> as
> __init, and emptying kvm_arch_init() will allow dropping the hook
> entirely once all architecture implementations are nops.
> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
>  arch/s390/kvm/kvm-s390.c | 29 +++++++++++++++++++++++++----
>  1 file changed, 25 insertions(+), 4 deletions(-)

Reviewed-by: Eric Farman <farman@...ux.ibm.com>