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RE: AST2600 support in QEMU

From: Shivi Fotedar
Subject: RE: AST2600 support in QEMU
Date: Wed, 10 Aug 2022 19:11:57 +0000

Cedric, Joel

Thanks so much for the pointers. This definitely helps. We will get back to you 
with any further questions once we have looked them over. 

-----Original Message-----
From: Cédric Le Goater <clg@kaod.org> 
Sent: Tuesday, August 9, 2022 10:50 PM
To: Joel Stanley <joel@jms.id.au>; Shivi Fotedar <sfotedar@nvidia.com>; Peter 
Delevoryas <peter@pjd.dev>; Jeremy Kerr <jk@ozlabs.org>; Klaus Jensen 
<its@irrelevant.dk>; Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: qemu-devel@nongnu.org; Andrew Jeffery <andrew@aj.id.au>; Amit Kumar 
(Engrg-SW) <asinghal@nvidia.com>; Prasanna Karmalkar <pkarmalkar@nvidia.com>; 
Tim Chen (SW-GPU) <timch@nvidia.com>; Newton Liu <newtonl@nvidia.com>; Deepak 
Kodihalli <dkodihalli@nvidia.com>; qemu-arm <qemu-arm@nongnu.org>
Subject: Re: AST2600 support in QEMU

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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 :


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


Peter D. experimented with IPMI. See :


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.



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