linux-kernel - Re: [RFC] KVM: s390: pci: register pci hooks without interpretation

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Message-ID: <ba5b32c4-4ece-6193-0788-2ce0dc20b235@linux.ibm.com>
Date:   Tue, 20 Sep 2022 15:28:40 -0400
From:   Matthew Rosato <mjrosato@...ux.ibm.com>
To:     linux-s390@...r.kernel.org
Cc:     farman@...ux.ibm.com, schnelle@...ux.ibm.com, pmorel@...ux.ibm.com,
        borntraeger@...ux.ibm.com, frankja@...ux.ibm.com,
        imbrenda@...ux.ibm.com, david@...hat.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, agordeev@...ux.ibm.com, svens@...ux.ibm.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] KVM: s390: pci: register pci hooks without interpretation

On 9/20/22 3:27 PM, Matthew Rosato wrote:
> The kvm registration hooks must be registered even if the facilities
> necessary for zPCI interpretation are unavailable, as vfio-pci-zdev will
> expect to use the hooks regardless.
> This fixes an issue where vfio-pci-zdev will fail its open function
> because of a missing kvm_register when running on hardware that does not
> support zPCI interpretation.
> 
> Fixes: ca922fecda6c ("KVM: s390: pci: Hook to access KVM lowlevel from VFIO")
> Signed-off-by: Matthew Rosato <mjrosato@...ux.ibm.com>

Ignore this, meant to send as a PATCH not RFC.