Subject: Re: [PATCH v2 35/45] KVM: s390: Manually invoke vcpu setup during kvm_arch_vcpu_create()

From: Cornelia Huck <[email-masked]>
Date: Fri, 20 Dec 2019 11:04:45 +0100

On Wed, 18 Dec 2019 13:55:20 -0800
Sean Christopherson <[email-masked]> wrote:

> Rename kvm_arch_vcpu_setup() to kvm_s390_vcpu_setup() and manually call
> the new function during kvm_arch_vcpu_create().  Define an empty
> kvm_arch_vcpu_setup() as it's still required for compilation.  This
> is effectively a nop as kvm_arch_vcpu_create() and kvm_arch_vcpu_setup()
> are called back-to-back by common KVM code.  Obsoleting
> kvm_arch_vcpu_setup() paves the way for its removal.
> 
> Note, gmap_remove() is now called if setup fails, as s390 was previously
> freeing it via kvm_arch_vcpu_destroy(), which is called by common KVM
> code if kvm_arch_vcpu_setup() fails.

Yes, this looks like the only thing that needs to be undone
(sca_add_vcpu() is done later in the process.)

Maybe mention that gmap_remove() is for ucontrol only? I was confused
for a moment :)

> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <[email-masked]>
> ---
>  arch/s390/kvm/kvm-s390.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)

Reviewed-by: Cornelia Huck <[email-masked]>

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