Re: AST2600 support in QEMU

[Cédric Le Goater]

Hello,

On 8/10/22 04:37, Joel Stanley wrote:
> Hello Shivi,
>
> I've added others to cc who may have some input.
>
> On Tue, 9 Aug 2022 at 21:38, Shivi Fotedar <sfotedar@nvidia.com> wrote:
> > Hello, we are looking for support for few features for AST2600 in QEMU, 
> > specifically
> >
> > PCIe RC support so BMC can talk to downstream devices for management functions.
>
> I haven't seen any PCIe work done yet.

I haven't either. There is clearly a need now that we are moving
away from LPC.

> > MCTP controller to run MCTP protocol on top of PCIe or I2C.
>
> What work would be required to do this on top of i2c?

I think Jonathan and Klaus worked on this. See :

  https://lore.kernel.org/qemu-devel/20220525121422.00003a84@Huawei.com/

> > I2C slave so BMC can talk to host CPU QEMU for IPMI
>
> Some support for slave mode was merged in v7.1.

yes.

Peter D. experimented with IPMI. See :

  https://lore.kernel.org/qemu-devel/20220630045133.32251-14-me@pjd.dev/

We also merged a new machine including a BMC ast2600 running OpenBMC
and an ast1030 SoC running OpenBIC. Work to interconnect them on the
same I2C bus is in progress.

Thanks,

C.