Re: [Qemu-devel] [RFC 0/3] Draft implementation of HPT resizing (qemu side)

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, Jan 18, 2016 at 04:44:38PM +1100, David Gibson wrote:
1;2802;0c> Here is a draft qemu implementation of my proposed PAPR extension for
> allowing runtime resizing of a KVM/ppc64 guest's hash page table.
> That in turn will allow for more flexible memory hotplug.
> 
> This should work with the guest kernel side patches I also posted
> recently [1].
> 
> Still required to make this into a full implementation:
>   * Guest needs to auto-resize HPT on memory hotplug events
> 
>   * qemu needs to allocate HPT size based on current rather than
>     maximum memory if the guest is HPT resize aware
> 
>   * KVM host side implementation
> 
>   * PAPR standardization
> 
> 
> [1] http://thread.gmane.org/gmane.linux.ports.ppc.embedded/90392

Sorry, forgot to mention that this series applies on top of my page
size handling cleanup series posted recently.

> 
> David Gibson (3):
>   pseries: Stub hypercalls for HPT resizing
>   pseries: Implement HPT resizing
>   pseries: Advertise HPT resize capability
> 
>  hw/ppc/spapr.c          |   5 +-
>  hw/ppc/spapr_hcall.c    | 331 ++++++++++++++++++++++++++++++++++++++++++++++++
>  include/hw/ppc/spapr.h  |   9 +-
>  target-ppc/mmu-hash64.h |   4 +
>  trace-events            |   2 +
>  5 files changed, 348 insertions(+), 3 deletions(-)
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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