linux-kernel - Re: [PATCH v2 1/2] edac,ghes,cper: Add Row Extension to Memory Error Record

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Message-ID: <CAMj1kXGvfiqZz-j5=LU0Z6yYCkr24pCz6aJS62QL8cBYUP_S=w@mail.gmail.com>
Date:   Tue, 15 Sep 2020 20:12:31 +0300
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Alex Kluver <alex.kluver@....com>, linux-edac@...r.kernel.org,
        linux-efi <linux-efi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        mchehab@...nel.org, russ.anderson@....com,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        kluveralex@...il.com
Subject: Re: [PATCH v2 1/2] edac,ghes,cper: Add Row Extension to Memory Error Record

On Tue, 15 Sep 2020 at 20:07, Ard Biesheuvel <ardb@...nel.org> wrote:
>
> On Tue, 15 Sep 2020 at 19:33, Borislav Petkov <bp@...en8.de> wrote:
> >
> > On Wed, Aug 19, 2020 at 09:35:43AM -0500, Alex Kluver wrote:
> > > Memory errors could be printed with incorrect row values since the DIMM
> > > size has outgrown the 16 bit row field in the CPER structure. UEFI
> > > Specification Version 2.8 has increased the size of row by allowing it to
> > > use the first 2 bits from a previously reserved space within the structure.
> > >
> > > When needed, add the extension bits to the row value printed.
> > >
> > > Based on UEFI 2.8 Table 299. Memory Error Record
> > >
> > > Reviewed-by: Kyle Meyer <kyle.meyer@....com>
> > > Reviewed-by: Steve Wahl <steve.wahl@....com>
> > > Tested-by: Russ Anderson <russ.anderson@....com>
> > > Signed-off-by: Alex Kluver <alex.kluver@....com>
> > > ---
> > >
> > > v1 -> v2:
> > >    * Add static inline cper_get_mem_extension() to make it
> > >     more readable, as suggested by Borislav Petkov.
> > >
> > >    * Add second patch for bank field, bank group, and chip id.
> > >
> > > ---
> > >  drivers/edac/ghes_edac.c    |  8 ++++++--
> > >  drivers/firmware/efi/cper.c |  9 +++++++--
> > >  include/linux/cper.h        | 16 ++++++++++++++--
> > >  3 files changed, 27 insertions(+), 6 deletions(-)
> >
> > For the EDAC bits:
> >
> > Acked-by: Borislav Petkov <bp@...e.de>
> >
> > Also, I could take both through the EDAC tree, if people prefer.
> >
>
> I'll take this via the EFI tree - I was just preparing the branch for
> a PR anyways.

Alex - these patches do not apply cleanly. Could you please respin
them on top of the next branch in
https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git?

Boris - do you anticipate any conflicts? If so, please take these via
the EDAC tree - the CPER code is mostly self contained so I don't
expect any conflicts with the EFI tree in that case.