Linux kernel updates and v6.0

[Patrick Williams]

Joel,

Any thoughts on this?

On Wed, Sep 28, 2022 at 03:30:23PM -0700, William Kennington wrote:
> The ToF was talking about linux versions being used for OpenBMC users and
> we were wondering if we could codify a policy around which versions we will
> be developing against regularly. In the past it seems like you usually pick
> LTS releases to base on (and Facebook / Google are interested in sticking
> with LTS releases in order to reduce toil / number of potentially
> incompatible kernel upgrades for each of our machines). It would seem like
> kernel 6.0 should be an LTS release, although gregkh hasn't said anything
> specifically about it yet. Can we get something written about the expected
> alignment with upstream kernel release cadence?

For minor clairification, I believe it was Intel / Google that preferred
LTS.  Meta does not have a preference as long as the OpenBMC tree is
well-supported and we can backport changes that have been sent
upstream.

> On Tue, Sep 27, 2022 at 11:35 PM Joel Stanley <joel at jms.id.au> wrote:
> 
> > Hello OpenBMC,
> >
> > We've been using the v5.15 kernel as a base for almost 11 months. In
> > that time there's been 16 bumps to pull in stable fixes. We have
> > merged about 300 patches in that time to support new machines, and new
> > hardware, including MCTP, nct6775, lm25066, aspeed-adc and aspeed's
> > spi-nor devices.
> >
> > It's time to move to a new base to ensure progress is made on our
> > mission to upstream all of the support. By rebasing on a new kernel
> > release we can see what work has been done, and what remains. Since
> > v5.15 we have upstream support for:
> >
> >  - PECI, thanks to Jae and Iwona
> >  - MCTP, thanks to Jermey and Matt
> >  - spi-nor, thanks to Cédric
> >  - nct6775 i2c and lm25066, thanks to Zev
> >  - ast2600 adc, thanks to Billy
> >  - ast2600 gfx, thanks to Tommy
> >
> > and others I have missed.
> >
> > In addition to the ASPEED changes the Nuvton hackers have been hard at
> > work. We now have support for their latest generation  Cortex-A35 BMC,
> > the npcm845 "Arbel" and it's eval board. Likewise the HPE "GXP"
> > Cortex-A9 ASIC now has upstream support. Congratulations to both teams
> > for this work.
> >
> > I have prepared a v6.0 tree that contains backports of the FSI and
> > Aspeed v6.1 patches, and a small set of existing patches. I will
> > publish this on Monday, or once v6.0 final has been tagged.
> >
> > As promised the last time we rebased, the Nuvoton patches that have
> > not seen any updates since they were merged in 2019 have been dropped.
> > They are welcome to be resubmitted as long as they are also being
> > worked on upstream.
> >
> > Please address any future patches to the dev-6.0 tree.
> >
> > Cheers,
> >
> > Joel
> >

-- 
Patrick Williams
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