linux-kernel - Re: [PATCH v12 0/3] s390x: KVM: CPU Topology

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Message-ID: <2e9f3da3-301f-9f1e-c39c-bf59a515e446@linux.ibm.com>
Date:   Wed, 13 Jul 2022 11:02:11 +0200
From:   Janosch Frank <frankja@...ux.ibm.com>
To:     Pierre Morel <pmorel@...ux.ibm.com>, kvm@...r.kernel.org
Cc:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        borntraeger@...ibm.com, cohuck@...hat.com, david@...hat.com,
        thuth@...hat.com, imbrenda@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, wintera@...ux.ibm.com, seiden@...ux.ibm.com,
        nrb@...ux.ibm.com, scgl@...ux.ibm.com
Subject: Re: [PATCH v12 0/3] s390x: KVM: CPU Topology

On 7/11/22 10:41, Pierre Morel wrote:
> Hi all,
> 
> This new spin suppress the check for real cpu migration and
> modify the checking of valid function code inside the interception
> of the STSI instruction.
> 
> The series provides:
> 0- Modification of the ipte lock handling to use KVM instead of the
>     vcpu as an argument because ipte lock work on SCA which is uniq
>     per KVM structure and common to all vCPUs.
> 1- interception of the STSI instruction forwarding the CPU topology
> 2- interpretation of the PTF instruction
> 3- a KVM capability for the userland hypervisor to ask KVM to
>     setup PTF interpretation.
> 4- KVM ioctl to get and set the MTCR bit of the SCA in order to
>     migrate this bit during a migration.

Please rebase before sending the next version