Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers.

From	Geoff Levand <geoff@infradead.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers.
Date	2018-06-08 21:40 +0200
Message-ID	<vYvoR-8py-1@gated-at.bofh.it> (permalink)
References	(4 earlier) <vVVIR-41t-9@gated-at.bofh.it> <vX8NH-7gN-1@gated-at.bofh.it> <vXeJr-2B3-1@gated-at.bofh.it> <vVVIR-41t-9@gated-at.bofh.it> <vXeJr-2B3-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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On 06/05/2018 12:28 AM, Ian Campbell wrote:
> On Tue, 2018-06-05 at 02:14 +0100, Ben Hutchings wrote:
> 
>> I don't think it's OK to cause a regression like this.  Since this is
>> problem affects a specific known platform, the driver ought to
>> recognise it and disable itself automatically.
> 
> Indeed, while the Fedora bug upthread claims such a patch wouldn't be
> upstreamable, AFAIK it is not uncommon to have such quirks for broken
> firmware based upon DMI identifiers or similar.

Just to mention it, Mark Salter submitted one of the work-around patches
for the m400 firmware.  The reply from the ACPI maintainer wasn't very
encouraging. See:

  https://lkml.org/lkml/2018/4/19/1020 (ACPI / scan: Fix regression related to X-Gene UARTs)

CONFIG_ACPI_APEI allows for automated error reporting, so it is something
that is very desirable for unattended servers in a production environment.
Mark sent me a minimal patch that allows CONFIG_ACPI_APEI to work on m400.
I've attached a patch that puts his patch into the kernel patch series.  

  arm64-Add-fix-for-broken-HPE-moonshot-ACPI-APEI-supp.patch

Is this an acceptable solution?

Thread

Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-06-01 19:10 +0200
  Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Riku Voipio <riku.voipio@iki.fi> - 2018-06-04 13:10 +0200
    Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-06-04 17:40 +0200
      Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ben Hutchings <ben@decadent.org.uk> - 2018-06-05 03:20 +0200
        Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ian Campbell <ijc@debian.org> - 2018-06-05 09:40 +0200
          Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-06-08 21:40 +0200
            Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ian Campbell <ijc@debian.org> - 2018-06-09 14:20 +0200
              Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-06-13 21:30 +0200
                Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ian Campbell <ijc@debian.org> - 2018-06-14 11:10 +0200
                Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Riku Voipio <riku.voipio@iki.fi> - 2018-08-06 16:40 +0200
                Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-08-07 00:10 +0200
  Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-09-01 01:00 +0200
    Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ian Campbell <ijc@debian.org> - 2018-09-02 10:00 +0200
  Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-09-01 02:00 +0200
    Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ben Hutchings <ben@decadent.org.uk> - 2018-09-04 19:30 +0200
      Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-09-04 20:50 +0200
        Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Riku Voipio <riku.voipio@iki.fi> - 2018-09-05 08:50 +0200
        Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ben Hutchings <ben@decadent.org.uk> - 2018-09-06 22:30 +0200
  Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-09-20 22:00 +0200
    Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-09-21 17:40 +0200
      Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Ben Hutchings <ben@decadent.org.uk> - 2018-09-22 01:30 +0200
        Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers. Geoff Levand <geoff@infradead.org> - 2018-09-24 19:20 +0200

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