Re: [Qemu-ppc] [Qemu-devel] [PATCH v1 0/3] add Homer/OCC common area emulation for PowerNV

[Cédric Le Goater]

On 10/09/2019 09:10, Balamuruhan S wrote:
> Hi All,
> 
> This is follow-up patch that implements HOMER and OCC SRAM device
> models to emulate homer memory and occ common area access for pstate
> table, occ sensors, runtime data and slw.
> 
> This version addresses review comments in previous patchset and
> breaks it to have separate patch series for Homer and OCC emulation,
> 
> https://lists.gnu.org/archive/html/qemu-devel/2019-08/msg00979.html
> 
> currently skiboot disables the homer/occ code path with `QUIRK_NO_PBA`,
> this quirk have to be removed in skiboot for it to use HOMER and OCC
> SRAM device models along with few bug fixes,
> 
> https://github.com/balamuruhans/skiboot/commit/a655514d2a730e0372a2faee277d1cf01f71a524
> https://github.com/balamuruhans/skiboot/commit/fd3d93d92ec66a7494346d6d24ced7b48264c9a0

Can't we generate the sensors in QEMU ? I am not sure what this
patch does. Is the Header Block invalid ? 

It would be good to generate properties to control their values 
on the monitor line, like Rashmica did for GPIO model in the 
Aspeed machine.

> https://github.com/balamuruhans/skiboot/commit/165b3829a93bc177c18133945a8cca3a2d701173

This one is weird .

C. 

> 
> changes from v1:
>     * reuse PnvOCC device model to implement SRAM device.
>     * implement PnvHomer as separate device model.
>     * have core max base address as part of PnvHOMERClass.
>     * reuse PNV_CHIP_INDEX() instead of introducing new `chip_num`.
>     * define all the memory ops access address as macros.
>     * few coding style warnings given by checkpatch.pl.
> 
> I request for review, comments and suggestions for the changes.
> 
> Balamuruhan S (3):
>   hw/ppc/pnv_xscom: retrieve homer/occ base address from PBA BARs
>   hw/ppc/pnv_occ: add sram device model for occ common area
>   hw/ppc/pnv_homer: add PowerNV homer device model
> 
>  hw/ppc/Makefile.objs       |   1 +
>  hw/ppc/pnv.c               |  87 ++++++++++++---
>  hw/ppc/pnv_homer.c         | 258 
> +++++++++++++++++++++++++++++++++++++++++++++
>  hw/ppc/pnv_occ.c           |  78 ++++++++++++++
>  hw/ppc/pnv_xscom.c         |  34 +++++-
>  include/hw/ppc/pnv.h       |  21 ++++
>  include/hw/ppc/pnv_homer.h |  52 +++++++++
>  include/hw/ppc/pnv_occ.h   |   3 +
>  8 files changed, 513 insertions(+), 21 deletions(-)
>  create mode 100644 hw/ppc/pnv_homer.c
>  create mode 100644 include/hw/ppc/pnv_homer.h
>