Re: [PATCH] x86/tlb: Flush global mappings when KAISER is disabled

Ben Hutchings
2021-03-25T23:58:02Z

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On Thu, 2021-03-25 at 19:19 -0400, Sasha Levin wrote:
> On Thu, Mar 25, 2021 at 04:36:55PM -0400, Sasha Levin wrote:
> > On Thu, Mar 25, 2021 at 09:09:42PM +0100, Borislav Petkov wrote:
> > > Hi stable folks,
> > >
> > > the patch below fixes kernels 4.4 and 4.9 booting on AMD platforms with
> > > PCID support. It doesn't have an upstream counterpart because it patches
> > > the KAISER code which didn't go upstream. It applies fine to both of the
> > > aforementioned kernels - please pick it up.
> >
> > Queued up for 4.9 and 4.4, thanks!
> >
> > > Jim Mattson reported that Debian 9 guests using a 4.9-stable kernel
> > > are exploding during alternatives patching:
> >
> > (Cc Ben & Salvatore)
> >
> > I'm not sure if 4.9 or Debian is still alive or not, but FYI...
>                     *on
>
>                     :)

We're supporting both 4.9 and 4.19 in Debian 9. The general rule is we
carry on with the same stable kernel branch for the whole 5 year
support period, but add the option of using the kernel version from the
next stable release.

Ben.

--
Ben Hutchings
Teamwork is essential - it allows you to blame someone else.

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