Bug#900581: linux: Enable Buster kernel features for newer ARM64 servers.
Hi Ben,
On 09/04/2018 10:25 AM, Ben Hutchings wrote:
> On Fri, 2018-08-31 at 15:42 -0700, Geoff Levand wrote:
>> I've rebased my two kernel config patches, attached, to the latest
>> v4.17.17-1 buster kernel. These patches enable kernel features for
>> newer ARM64 servers.
>>
>> 0001-arm64-Use-default-of-CONFIG_ACPI_NFIT-m.patch
>> 0002-arm64-Updates-for-ACPI-servers.patch
>>
>> The issue that Riku brought up of how to support HPE m400 moonshot
>> systems when ACPI_APEI is enabled has been resolved on the
>> arm-kernel ML [1]. In summary, the latest released m400 firmware
>> did not support APEI, and so no special work-around or kernel quirk
>> support is needed.
>>
>> With the resolution of that issue I feel these patches are ready to
>> apply. Please consider.
>
> Is it resolved? Graeme Gregory claimed
> (https://www.spinics.net/lists/arm-kernel/msg669946.html) that "most
> people are running the firmware provided from HPe support but was never
> put on release site".
I took that as just a comment on the discussion which it follows, which
seemed to end with 'distro maintainers deciding how to handle the problem'
and then Riku recommending to document the need in Debian for a m400
specific command line option.
Based on the several mail list discussions that came out of this I
think it very unlikely we'll get an upstream kernel fix. My appeal
directly to Will Deacon for guidance even went unanswered.
At this point I feel our choices are:
1) Merge the kernel config patch I proposed and add a comment to
the arm64 Installation Guide about the need to add 'hest_disable=1'
to the kernel command line for the m400.
2) Merge the kernel config patch and the
'Add fix for broken HPE moonshot ACPI-APEI support' patch I proposed.
3) Remove the CONFIG_ACPI_APEI options from the the kernel config patch
I proposed and merge that.
I prefer #2, which would get us ACPI_APEI support and a seamless
install for m400 users.
If there is anything you recommend I could try it. I'm not apposed
to any solution. I just want to get the kernel config updated so
Buster better supports newer systems.
-Geoff
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