Re: [PATCH v3 0/3] Add (more) missing PolarFire SoC io regions

[Alistair Francis <alistair23@gmail.com>]

On Fri, Nov 18, 2022 at 8:57 AM Conor Dooley <conor@kernel.org> wrote:
>
> From: Conor Dooley <conor.dooley@microchip.com>
>
> Hey all,
> Apart from DDR (see [1]), these should be the last bits needed to get
> recent Linux kernels booting again for Icicle/PolarFire SoC. Previously,
> I had been disabling the hwrng and PCI but I keep forgetting that is
> required and decided to fix that.
>
> I'm not entirely sure if I have done some sort of no-no thing by
> registering the same interrupt with both the IOSCB and SYSREG regions.
> The interrupt is raised after the system controller handles a service
> via the mailbox. The mailbox's status, control and mailbox registers
> are all part of the IOSCB region. It's cleared by a write to a register
> in the SYSREG region.
> Since my goal here is to add the regions/peripherals without actually
> implementing them so that Linux etc, I'm just raising an interrupt
> once a guest requests a service & reporting a status indicating that the
> service request failed.
>
> Thanks,
> Conor.
>
> 1 - https://lore.kernel.org/all/Y2+dUCpd8OP52%2FDJ@spud/
>
> Changes since v2:
> - fix the actual bits in the register used for the service return
>   status
> - remove a duplicate irq_lower() in the sysreg bits of patch 3
> - move the irq raise to a write function, raising it in the read one was
>   causing the irq to get raised twice by the linux driver that works
>   properly with the actual hardware. oops.
>
> Conor Dooley (3):
>   hw/misc: pfsoc: add fabric clocks to ioscb
>   hw/riscv: pfsoc: add missing FICs as unimplemented
>   hw/{misc,riscv}: pfsoc: add system controller as unimplemented

Thanks!

Applied to riscv-to-apply.next

Alistair

>
>  hw/misc/mchp_pfsoc_ioscb.c          |  78 +++++++++++++++++-
>  hw/misc/mchp_pfsoc_sysreg.c         |  18 ++++-
>  hw/riscv/microchip_pfsoc.c          | 121 ++++++++++++++++------------
>  include/hw/misc/mchp_pfsoc_ioscb.h  |   4 +
>  include/hw/misc/mchp_pfsoc_sysreg.h |   1 +
>  include/hw/riscv/microchip_pfsoc.h  |   3 +
>  6 files changed, 167 insertions(+), 58 deletions(-)
>
> --
> 2.37.2
>
>