Re: [PATCH][2/2] PPC64: RPA dynamic addition/removal of PCI Host Bridges

[Greg KH <greg@kroah.com>]

On Wed, Sep 29, 2004 at 03:18:37PM +1000, Paul Mackerras wrote:
> From: John Rose <johnrose@austin.ibm.com>
> 
> The following patch implements the ppc64-specific bits for dynamic (DLPAR)
> addition of PCI Host Bridges.  The entry point for this operation is
> init_phb_dynamic(), which will be called by the RPA DLPAR driver.  
> 
> Among the implementation details, the global number aka PCI domain for the
> newly added PHB is assigned using the same simple counter that assigns it at
> boot.  This has two consequences.  First, the PCI domain associated with a PHB
> will not persist across DLPAR remove and subsequent add.  Second, stress tests
> that repeatedly add/remove PHBs might generate some large values for PCI
> domain.  If we decide at a later point to hash an OF property to PCI domain
> value, this can be easily fixed up.
> 
> Also, the linux,pci-domain property is not generated for the newly added PHBs
> at the moment.  Because there doesn't seem to be an easy way to dynamically add
> single properties to the OFDT, and because the userspace dependency on this
> property is being questioned, I've ignored it for now.  If we decide on a
> solution for this at a later point, it can also be easily fixed up.

Applied, thanks.

greg k-h