[Skiboot] [RFC PATCH] plat/qemu: Add BT device
Cédric Le Goater
clg at fr.ibm.com
Sat Nov 14 04:33:14 AEDT 2015
On 11/12/2015 11:24 PM, Benjamin Herrenschmidt wrote:
> On Thu, 2015-11-12 at 18:23 +0100, Cédric Le Goater wrote:
>> This adds the BT device used to communicate with the BMC. This is
>> sufficient to handle IPMI messaging, power_downs and reboots the
>> way openpower systems do it.
>> This patch needs to run on Ben's tree adding the support for the
>> PowerNV platform in qemu, plus some patches of mine. You will find
>> the resulting tree here :
>> It's basic, probably a little too hacky, but it does provide enough
>> of a framework to handle communication with the BMC. Is it something
>> we want to add to qemu ?
> Thanks !
> There's actually a pretty complete IPMI stack with BT etc... being
> written by Corey Minyard. He submitted it a while back, it didn't go in
> but he told me he plans to resubmit reasonably soon:
That looks pretty mature. Impressive.
So I did some cookery today. I merged his patches and yours in this tree :
Added the missing IPMI commands for pnv and the results looks promising.
Just run a qemu with these devices :
-device ipmi-bmc-sim,id=bmc0 -device isa-ipmi-bt,bmc=bmc0,irq=10
and skiboot/Linux will run fine.
I did not port the SMS_ATN part. It should not be a big deal as all the
framework is already in Corey's code.
As for my little BT thingy, I guess it is born obsolete. But it is small
and does the job. May be we can keep it around for testing purpose until
Corey merges his patchset ? Dunno, you tell me. I can put some efforts
on both tree, Corey's tree and mine. It shouldn't be a problem.
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