Zachary Amsden wrote:
> Probably a config file difference - GOBIOS vs GODIRECT.
>
> These patches look fine, although is there a more general solution?
> Like bypassing the whole PCI ROM probing entirely? We don't really
> want to use the PCI ROM here either, although we have a slightly worse
> problem - the pages are mapped and do have a PCI ROM. Perhaps
> paravirt-ops should be able to flip a global switch to disable this
> (perhaps already there?).
There's a pci_probe variable, which has a bitmask of which PCI access
methods to use; if you mask out PCI_PROBE_BIOS then it won't bother. I
considered doing this, but it wasn't clear to me where this actually get
set up (it's a bit diffuse), and whether to add a new pv_op hook
intercept this.
I also thought that we don't necessarily want to unconditionally disable
PCI access for paravirt guests since even an unprivileged guest may have
a raw device exported to it, and we don't want to add too many special
cases when dom0 is migrated to operate in the pv_op world. So it seemed
more correct to actually allow the probe but deal with unmapped pci ROM
space.
J
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