Subject: Re: powerpc/64s: Fix DT CPU features Power9 DD2.1 logic

From: Michael Ellerman <[email-masked]>
Date: Wed, 20 Jun 2018 09:21:11 +1000 (AEST)

On Wed, 2018-06-13 at 13:23:56 UTC, Michael Ellerman wrote:
> In the device tree CPU features quirk code we want to set
> CPU_FTR_POWER9_DD2_1 on all Power9s that aren't DD2.0 or earlier. But
> we got the logic wrong and instead set it on all CPUs that aren't
> Power9 DD2.0 or earlier, ie. including Power8.
> 
> Fix it by making sure we're on a Power9. This isn't a bug in practice
> because the only code that checks the feature is Power9 only to begin
> with. But we'll backport it anyway to avoid confusion.
> 
> Fixes: 9e9626ed3a4a ("powerpc/64s: Fix POWER9 DD2.2 and above in DT CPU features")
> Cc: [email-masked] # v4.17+
> Reported-by: Paul Mackerras <[email-masked]>
> Signed-off-by: Michael Ellerman <[email-masked]>
> Acked-by: Nicholas Piggin <[email-masked]>

Applied to powerpc fixes.

https://git.kernel.org/powerpc/c/749a0278c2177b2d16da5d8b135ba7

cheers