linux-kernel - Re: [PATCH v2] KVM: s390: pci: Hook to access KVM lowlevel from VFIO

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Message-ID: <62420273c48f2edecf12ec8784ef03adadea2a4b.camel@linux.ibm.com>
Date:   Tue, 23 Aug 2022 13:54:21 +0200
From:   Niklas Schnelle <schnelle@...ux.ibm.com>
To:     Janosch Frank <frankja@...ux.ibm.com>,
        Pierre Morel <pmorel@...ux.ibm.com>, mjrosato@...ux.ibm.com
Cc:     rdunlap@...radead.org, linux-kernel@...r.kernel.org, lkp@...el.com,
        borntraeger@...ux.ibm.com, farman@...ux.ibm.com,
        linux-s390@...r.kernel.org, kvm@...r.kernel.org, gor@...ux.ibm.com,
        hca@...ux.ibm.com, alex.williamson@...hat.com, cohuck@...hat.com
Subject: Re: [PATCH v2] KVM: s390: pci: Hook to access KVM lowlevel from VFIO

On Tue, 2022-08-23 at 09:25 +0200, Janosch Frank wrote:
> On 8/19/22 14:29, Pierre Morel wrote:
> > We have a cross dependency between KVM and VFIO when using
> > s390 vfio_pci_zdev extensions for PCI passthrough
> > To be able to keep both subsystem modular we add a registering
> > hook inside the S390 core code.
> > 
> > This fixes a build problem when VFIO is built-in and KVM is built
> > as a module.
> > 
> > Reported-by: Randy Dunlap <rdunlap@...radead.org>
> > Reported-by: kernel test robot <lkp@...el.com>
> > Reviewed-by: Matthew Rosato <mjrosato@...ux.ibm.com>
> > Reviewed-by: Niklas Schnelle <schnelle@...ux.ibm.com>
> > Signed-off-by: Pierre Morel <pmorel@...ux.ibm.com>
> > Fixes: 09340b2fca007 ("KVM: s390: pci: add routines to start/stop interpretive execution")
> > Cc: <stable@...r.kernel.org>
> 
> Acked-by: Janosch Frank <frankja@...ux.ibm.com>
> 
> @Niklas @Matt: Since the patches that introduced the PCI interpretation 
> went via the KVM tree I'll also move this patch via the KVM tree.

Sounds good, thanks.