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Message-ID: <5c06e9dae0848e21168a70183f2cfa4e55793586.camel@linux.ibm.com>
Subject: Re: [PATCH] KVM: s390: pci: Hook to access KVM lowlevel from VFIO
From:   Niklas Schnelle <schnelle@linux.ibm.com>
To:     Pierre Morel <pmorel@linux.ibm.com>, mjrosato@linux.ibm.com
Cc:     rdunlap@infradead.org, linux-kernel@vger.kernel.org, lkp@intel.com,
        borntraeger@linux.ibm.com, farman@linux.ibm.com,
        linux-s390@vger.kernel.org, kvm@vger.kernel.org, gor@linux.ibm.com,
        hca@linux.ibm.com, frankja@linux.ibm.com
Date:   Fri, 19 Aug 2022 13:49:29 +0200
In-Reply-To: <b22977d5-6df7-13e0-802f-6201e6445d72@linux.ibm.com>
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         <2ae0bf9abffe2eb3eb2fb3f84873720d39f73d4d.camel@linux.ibm.com>
         <0d7d055d-f323-acba-cb79-f859b5e182b4@linux.ibm.com>
         <ae19135f580e1f510e99d1567514cc2dfe3571be.camel@linux.ibm.com>
         <b22977d5-6df7-13e0-802f-6201e6445d72@linux.ibm.com>
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---8<---
> > > > > diff --git a/arch/s390/pci/Makefile b/arch/s390/pci/Makefile
> > > > > index bf557a1b789c..c02dbfb415d9 100644
> > > > > --- a/arch/s390/pci/Makefile
> > > > > +++ b/arch/s390/pci/Makefile
> > > > > @@ -7,3 +7,5 @@ obj-$(CONFIG_PCI)	+= pci.o pci_irq.o pci_dma.o pci_clp.o pci_sysfs.o \
> > > > >    			   pci_event.o pci_debug.o pci_insn.o pci_mmio.o \
> > > > >    			   pci_bus.o
> > > > >    obj-$(CONFIG_PCI_IOV)	+= pci_iov.o
> > > > > +
> > > > > +obj-y += pci_kvm_hook.o
> > > > 
> > > > I thought we wanted to compile this only for CONFIG_PCI?
> > > 
> > > Ah sorry, that is indeed what I understood with Matt but then I
> > > misunderstood your own answer from yesterday.
> > > I change to
> > > obj-$(CONFIG_PCI) += pci_kvm_hook.o
> > > 
> > > > > diff --git a/arch/s390/pci/pci_kvm_hook.c b/arch/s390/pci/pci_kvm_hook.c
> > > > > new file mode 100644
> > > > > index 000000000000..ff34baf50a3e
> > > > ---8<---
> > > > 
> > 
> > Ok with the two things above plus the comment by Matt incorporated:
> > 
> > Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
> > 
> 
> Just a little correction, it changes nothing if the pci_kvm_hook.c goes 
> on same lines as other CONFIG_PCI depending files.
> So I put it on the same line.
> 
> Thanks
> 
> Pierre
> 

Of course yes. Thanks for fixing this and I'm assuming this would
either go through the KVM or vfio trees, correct?