[SeaBIOS] [Qemu-devel] [PATCH RFC] seabios: add OSHP method stub

Paul Brook paul at codesourcery.com
Tue Feb 14 13:49:08 CET 2012

> > In a nutshell, I don't know what a SHPC is (nor OSHP), so I'm looking
> > for an additional Ack.
> No problem, I'll get an Ack :)
> Meanwhile - here's a summary, as far as I understand it.
> Originally PCI SIG only defined the electrical
> and mechanical requirements from hotplug, no standard
> software interface. So it needed ACPI to drive device-specific registers
> to actually do hotplug.
> At some point PCISIG defined standard interfaces
> for PCI hotplug. There are two of them: standard
> hot plug controller (SHPC) for PCI and PCIE hotplug
> for Express.
> Now an OS can have a standard driver and use it
> to activate hotplug functionality. This is OS hotplug (OSHP).

So presumably this will work on targets that don't have ACPI?
Assuming a competent guest OS of course.  Have you tested this?


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