[Bug 1887989] Comment bridged from LTC Bugzilla

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------- Comment From tulioqm at br.ibm.com 2020-08-12 09:42 EDT-------
No, we're asking to backport the following 3 patches from glibc 2.32 that will allow Ubuntu 20.04 to be used to develop software for POWER10:

commit ae725e3f9cb4e1eb825ebe1d55241c98c2ea32f1
Author: Tulio Magno Quites Machado Filho <tuliom at linux.ibm.com>
Date:   Mon Jun 15 11:15:57 2020 -0300

powerpc: Add new hwcap values

Linux commit ID ee988c11acf6f9464b7b44e9a091bf6afb3b3a49 reserved 2 new
bits in AT_HWCAP2:
- PPC_FEATURE2_ARCH_3_1 indicates the availability of the POWER ISA
3.1;
- PPC_FEATURE2_MMA indicates the availability of the Matrix-Multiply
Assist facility.

commit d2ba3677da7a785556fcd708404d8e049b1c063b
Author: Tulio Magno Quites Machado Filho <tuliom at linux.ibm.com>
Date:   Wed Jun 24 18:04:41 2020 -0300

powerpc: Add support for POWER10

1. Add the directories to hold POWER10 files.

2. Add support to select POWER10 libraries based on AT_PLATFORM.

3. Let submachine=power10 be set automatically.

commit f6add169c89bbdd139a2eb845686127ead5799cd (queue/2.32)
Author: Tulio Magno Quites Machado Filho <tuliom at linux.ibm.com>
Date:   Tue Jul 21 18:01:39 2020 -0300

powerpc: Fix POWER10 selection

Add a line that was missing from a previous commit.
Without increasing str, the null-byte is not validated, and
_dl_string_platform returns -1.

Fixes: d2ba3677da7a ("powerpc: Add support for POWER10")

Reviewed-by: Carlos O'Donell <carlos at redhat.com>

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https://bugs.launchpad.net/bugs/1887989

Title:
  [20.04 Feature] Enable glibc for POWER10

Status in The Ubuntu-power-systems project:
  New
Status in glibc package in Ubuntu:
  In Progress
Status in glibc source package in Focal:
  New
Status in glibc source package in Groovy:
  In Progress

Bug description:
  == Comment: #0 - Tulio Magno Quites Machado Filho <tulioqm at br.ibm.com> - 2020-06-04 09:30:54 ==
  Add the basic enablement of POWER10 in glibc (AT_PLATFORM and AT_HWCAP2) allowing userspace software to use POWER10 features by using STT_GNU_IFUNC or providing shared libraries for POWER10, e.g. with files in /usr/lib/powerpc64le-linux-gnu/power10/.

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