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Date: Thu, 23 Sep 2021 13:10:50 +0200 From: Jan Beulich <jbeulich@...e.com> To: Oleksandr Andrushchenko <andr2000@...il.com> Cc: boris.ostrovsky@...cle.com, jgross@...e.com, julien@....org, sstabellini@...nel.org, Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>, xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 1/2] xen-pciback: prepare for the split for stub and PV On 23.09.2021 11:53, Oleksandr Andrushchenko wrote: > --- a/drivers/xen/Kconfig > +++ b/drivers/xen/Kconfig > @@ -180,10 +180,34 @@ config SWIOTLB_XEN > select DMA_OPS > select SWIOTLB > > +config XEN_PCI_STUB > + bool > + > +config XEN_PCIDEV_STUB > + tristate "Xen PCI-device stub driver" > + depends on PCI && !X86 && XEN > + depends on XEN_BACKEND > + select XEN_PCI_STUB > + default m > + help > + The PCI device stub driver provides limited version of the PCI > + device backend driver without para-virtualized support for guests. > + If you select this to be a module, you will need to make sure no > + other driver has bound to the device(s) you want to make visible to > + other guests. > + > + The "hide" parameter (only applicable if backend driver is compiled > + into the kernel) allows you to bind the PCI devices to this module > + from the default device drivers. The argument is the list of PCI BDFs: > + xen-pciback.hide=(03:00.0)(04:00.0) > + > + If in doubt, say m. > + > config XEN_PCIDEV_BACKEND > tristate "Xen PCI-device backend driver" > depends on PCI && X86 && XEN > depends on XEN_BACKEND > + select XEN_PCI_STUB Does kconfig not at least warn about this? The selected item has a "depends on !X88" conflicting with the "depends on X86" here. Jan
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