linux-kernel - Re: [PATCH] KVM: introduce kvm_arch_vcpu_async

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Message-Id: <b33966c9-d428-ba79-ecb1-1c873f39383e@de.ibm.com>
Date:   Tue, 12 Dec 2017 19:42:52 +0100
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     kvm-ppc@...r.kernel.org, cohuck@...hat.com,
        christoffer.dall@...aro.org, James Hogan <jhogan@...nel.org>,
        Paul Mackerras <paulus@...abs.org>
Subject: Re: [PATCH] KVM: introduce kvm_arch_vcpu_async_ioctl

On 12/12/2017 06:31 PM, Paolo Bonzini wrote:
> After the vcpu_load/vcpu_put pushdown, the handling of asynchronous VCPU
> ioctl is already much clearer in that it is obvious that they bypass
> vcpu_load and vcpu_put.
> 
> However, it is still not perfect in that the different state of the VCPU
> mutex is still hidden in the caller.  Separate those ioctls into a new
> function kvm_arch_vcpu_async_ioctl that returns -ENOIOCTLCMD for more
> "traditional" synchronous ioctls.
> 
> Cc: James Hogan <jhogan@...nel.org>
> Cc: Paul Mackerras <paulus@...abs.org>
> Cc: Christian Borntraeger <borntraeger@...ibm.com>

looks sane.

> Suggested-by: Cornelia Huck <cohuck@...hat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
>  arch/mips/kvm/mips.c       | 15 ++++++++++++---
>  arch/powerpc/kvm/powerpc.c | 14 +++++++++++---
>  arch/s390/kvm/kvm-s390.c   | 16 ++++++++++++----
>  include/linux/kvm_host.h   |  2 ++
>  virt/kvm/kvm_main.c        |  8 ++++----
>  5 files changed, 41 insertions(+), 14 deletions(-)
>