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Re: [PATCH 0/2] Fix for compat mode in P9 < 2.2
From: |
David Gibson |
Subject: |
Re: [PATCH 0/2] Fix for compat mode in P9 < 2.2 |
Date: |
Wed, 5 May 2021 13:29:37 +1000 |
On Tue, May 04, 2021 at 09:11:28PM -0300, Fabiano Rosas wrote:
> We dropped support in KVM for mixing MMU modes in machines that have
> old POWER9 processors which don't support mixing. As usual I forgot
> that compat mode exists:
>
> $ lscpu | grep pvr
> Model: 2.1 (pvr 004e 1201)
>
> $ ~/qemu-system-ppc64 -machine pseries,accel=kvm,max-cpu-compat=power8 ...
> error: kvm run failed Invalid argument
> NIP 0000000000000100 LR 0000000000000000 CTR 0000000000000000 XER
> 0000000000000000 CPU#0
> MSR 8000000000001000 HID0 0000000000000000 HF 8000000000000000 iidx 3 didx
> 3
> TB 00000000 00000000 DECR 0
> GPR00 0000000000000000 0000000000000000 0000000000000000 000000007ff00000
> GPR04 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR08 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR12 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR16 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR20 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR24 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR28 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> CR 00000000 [ - - - - - - - - ] RES ffffffffffffffff
> SRR0 0000000000000000 SRR1 0000000000000000 PVR 00000000004e1201
> VRSAVE 0000000000000000
> SPRG0 0000000000000000 SPRG1 0000000000000000 SPRG2 0000000000000000
> SPRG3 0000000000000000
> SPRG4 0000000000000000 SPRG5 0000000000000000 SPRG6 0000000000000000
> SPRG7 0000000000000000
> HSRR0 0000000000000000 HSRR1 0000000000000000
> CFAR 0000000000000000
> LPCR 000000000004f01f
> PTCR 0000000000000000 DAR 0000000000000000 DSISR 0000000000000000
>
> This series reuses some code we already have to abort and print a
> proper message if the chosen MMU mode is not supported by the host.
Applied to ppc-for-6.1, thanks.
>
> Fabiano Rosas (2):
> hw/ppc/spapr.c: Extract MMU mode error reporting into a function
> hw/ppc/spapr.c: Make sure the host supports the selected MMU mode
>
> hw/ppc/spapr.c | 17 +++++++++++++++++
> hw/ppc/spapr_hcall.c | 14 ++------------
> include/hw/ppc/spapr.h | 1 +
> 3 files changed, 20 insertions(+), 12 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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