Re: [PATCH v4 5/7] PCI/IOV: Check that VF BAR fits within the reservation

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On Mon, Oct 28, 2024 at 11:56:04AM -0500, Bjorn Helgaas wrote:
> On Fri, Oct 25, 2024 at 11:50:36PM +0200, Michał Winiarski wrote:
> > VF MMIO resource reservation, either created by system firmware and
> > inherited by Linux PCI subsystem or created by the subsystem itself,
> > should contain enough space to fit the BAR of all SR-IOV Virtual
> > Functions that can potentially be created (total VFs supported by the
> > device).
> 
> I don't think "VF resource reservation ... should contain enough
> space" is really accurate or actionable.  It would be *nice* if the PF
> BAR is large enough to accommodate the largest supported VF BARs for
> all possible VFs, but if it doesn't, it's not really an error.  It's
> just a reflection of the fact that resource space is limited.


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