Re: [Qemu-devel] [PATCH 0/5] ppc: Improve sPAPR CPU compatibility mode settings

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

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On Tue, Jun 07, 2016 at 05:39:35PM +0200, Thomas Huth wrote:
> If a guest currently only requests PowerISA 2.07 compatiblity mode with
> the "ibm,client-architecture-support" firmware call, but does not
> specify a matching real PVR for the host CPU on a POWER8 host,
> it ends up in POWER7 / PowerISA 2.06 compatibility mode since QEMU
> does not support 2.07 compatibility mode yet. This currently happens
> when running a Linux guest on a POWER8NVL host, since Linux guests
> do not use the PVR for these CPUs for the "ibm,client-architecture-
> support" call yet (but I submitted a patch for the kernel to fix this
> issue there last week, so the support should soon be there, too).
> 
> Anyway, QEMU should also support a proper 2.07 compatibility mode
> if the host CPU can do it. So this patch series introduces such a
> mode and does some clean-ups and other fixes along the way (e.g.
> it splits the ambiguous pcr_mask setting into two variables, one
> for defining the valid bits in the PCR register, and one for
> storing the valid ISA levels).
> 
> Thomas Huth (5):
>   ppc/spapr: Refactor h_client_architecture_support() CPU parsing code
>   ppc: Split pcr_mask settings into supported bits and the register mask
>   ppc: Provide function to get CPU class of the host CPU
>   ppc: Improve PCR bit selection in ppc_set_compat()
>   ppc: Add PowerISA 2.07 compatibility mode
> 
>  hw/ppc/spapr_hcall.c        | 63 +++++++++++++++++++++++++++------------------
>  target-ppc/cpu-qom.h        |  3 ++-
>  target-ppc/cpu.h            |  1 +
>  target-ppc/kvm.c            | 19 ++++++++++----
>  target-ppc/kvm_ppc.h        |  7 +++++
>  target-ppc/translate_init.c | 22 +++++++++++-----
>  6 files changed, 78 insertions(+), 37 deletions(-)

Applied to ppc-for-2.7, thanks.

-- 
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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