Re: [PATCH v2 00/16] powernv: introduce pnv-phb base/proxy devices

[Frederic Barrat <fbarrat@linux.ibm.com>]

On 31/05/2022 23:49, Daniel Henrique Barboza wrote:
> Hi,
> 
> This v2 is considerable different from the first version due to the
> review provided by Mark Cave-Ayland.
> 
> We're now preserving all PnvPHB3/4/5 implementations already in place.
> The PnvPHB device now acts as a base/proxy of the existing PHBs, which
> are turned into backends of the base PnvPHB device.
> 
> QOM is being more used this time by passing through properties to the
> PHB backends from the base device, and by setting the phb->version
> via global machine properties in each machine.
> 
> The changes made impact both user creatable and default devices, meaning
> that now the powernv machines are using the PnvPHB base device in all
> circunstances.
> 
> The one thing that I didn't change from v1 is the root port revamp. I
> didn't find enough reason to do the same thing we did with the PnvPHBs,
> given that all that differs them is the reset() callback of
> phb4_root_port. This means that patches 14-17 from v1 are still mostly
> the same.
> 
> 
> Changes from v1:
> - lots of changes in patches 1-6 and 7 due to the change of direction
> - patch 10 from v1: removed
> - PnvPHB.version is now being removed in patch 16
> - several other minor changes due to changes in the initial patches
> - v1 link: https://lists.gnu.org/archive/html/qemu-devel/2022-05/msg01410.html


Hi Daniel,

I have a few mostly minor comments coming but that series looks pretty 
good already! And you did a pretty good job splitting it, making the 
review easier. Thanks!

   Fred



> Daniel Henrique Barboza (16):
>    ppc/pnv: add PHB3 bus init helper
>    ppc/pnv: add pnv_get_phb3_child()
>    ppc/pnv: add PnvPHB base/proxy device
>    ppc/pnv: change PnvPHB3 to be a PnvPHB backend
>    ppc/pnv: user created pnv-phb for powernv8
>    ppc/pnv: add PHB4 bus init helper
>    ppc/pnv: change PnvPHB4 to be a PnvPHB backend
>    ppc/pnv: user created pnv-phb for powernv9
>    ppc/pnv: change pnv_phb4_get_pec() to also retrieve chip10->pecs
>    ppc/pnv: user creatable pnv-phb for powernv10
>    ppc/pnv: add pnv-phb-root-port device
>    ppc/pnv: remove pnv-phb3-root-port
>    ppc/pnv: remove pnv-phb4-root-port
>    ppc/pnv: remove 'phb_rootport_typename' in pnv_phb_realize()
>    ppc/pnv: remove pecc->rp_model
>    ppc/pnv: remove PnvPHB4.version
> 
>   hw/pci-host/meson.build        |   3 +-
>   hw/pci-host/pnv_phb.c          | 219 ++++++++++++++++++++++++++++++++
>   hw/pci-host/pnv_phb.h          |  56 ++++++++
>   hw/pci-host/pnv_phb3.c         | 144 ++++++++-------------
>   hw/pci-host/pnv_phb4.c         | 226 ++++++++++++++-------------------
>   hw/pci-host/pnv_phb4_pec.c     |  14 +-
>   hw/ppc/pnv.c                   |  78 ++++++++++--
>   include/hw/pci-host/pnv_phb3.h |  12 +-
>   include/hw/pci-host/pnv_phb4.h |  18 +--
>   include/hw/ppc/pnv.h           |   4 +-
>   10 files changed, 512 insertions(+), 262 deletions(-)
>   create mode 100644 hw/pci-host/pnv_phb.c
>   create mode 100644 hw/pci-host/pnv_phb.h
>