Subject: Re: [PATCH v2 0/9] Fixes and Enablement of ibm,drc-info property

From: Bjorn Helgaas <[email-masked]>
Date: Mon, 11 Nov 2019 13:49:28 -0600

On Sun, Nov 10, 2019 at 11:21:27PM -0600, Tyrel Datwyler wrote:
> There was a previous effort to add support for the PAPR
> architected ibm,drc-info property. This property provides a more
> memory compact representation of a parition's Dynamic Reconfig
> Connectors (DRC). These can otherwise be thought of as currently
> partitioned, or available but yet to be partitioned system resources
> such as cpus, memory, and physical/logical IOA devices.
> 
> The initial implementation proved buggy and was fully turned off by
> disabling the bit in the appropriate CAS support vector. We now have
> PowerVM firmware in the field that supports this new property, and
> further to support partitions with 24TB+ of possible memory this
> property is required to perform platform migration.
> 
> This series fixs the short comings of the previous submission
> in the areas of general implementation, cpu hotplug, and IOA hotplug.
> 
> v2 changelog:
> 	Cover Letter: fixed up spelling errors (mpe, tfalcon)
> 	Patch 3: added comment regarding indexing of drc values (tfalcon)
> 		 split drc-index and drc-info logic into multiple
> 		 functions for collecting cpu drc's for dlpar (mpe)
> 	Patch 7: fix up a couple more sparse warnings (mpe)
> 
> Tyrel Datwyler (9):
>   powerpc/pseries: Fix bad drc_index_start value parsing of drc-info
>     entry
>   powerpc/pseries: Fix drc-info mappings of logical cpus to drc-index
>   powerpc/pseries: Add cpu DLPAR support for drc-info property
>   PCI: rpaphp: Fix up pointer to first drc-info entry
>   PCI: rpaphp: Don't rely on firmware feature to imply drc-info support
>   PCI: rpaphp: Add drc-info support for hotplug slot registration
>   PCI: rpaphp: Annotate and correctly byte swap DRC properties
>   PCI: rpaphp: Correctly match ibm,my-drc-index to drc-name when using
>     drc-info
>   powerpc/pseries: Enable support for ibm,drc-info property
> 
>  arch/powerpc/kernel/prom_init.c                 |   2 +-
>  arch/powerpc/platforms/pseries/hotplug-cpu.c    | 127 +++++++++++++++++++++---
>  arch/powerpc/platforms/pseries/of_helpers.c     |   8 +-
>  arch/powerpc/platforms/pseries/pseries_energy.c |  23 ++---
>  drivers/pci/hotplug/rpaphp_core.c               | 127 +++++++++++++++++-------

For the drivers/pci/* parts:

Acked-by: Bjorn Helgaas <[email-masked]>

I assume they will be merged along with the rest of the series via
powerpc.

>  5 files changed, 216 insertions(+), 71 deletions(-)
> 
> -- 
> 2.7.4
>