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[Ping] [PATCH v3 0/6] aarch64: Allow overriding HWCAP_CPUID feature check
- From: Siddhesh Poyarekar <siddhesh at sourceware dot org>
- To: libc-alpha at sourceware dot org
- Cc: adhemerval dot zanella at linaro dot org, sellcey at cavium dot com
- Date: Mon, 5 Jun 2017 21:58:31 +0530
- Subject: [Ping] [PATCH v3 0/6] aarch64: Allow overriding HWCAP_CPUID feature check
- Authentication-results: sourceware.org; auth=none
- References: <1496347928-19432-1-git-send-email-siddhesh@sourceware.org>
- Reply-to: siddhesh at sourceware dot org
Ping!
On Friday 02 June 2017 01:42 AM, Siddhesh Poyarekar wrote:
> Hi,
>
> Here is another iteration of the patch to move LD_HWCAP_MASK into tunables
> and then using it to disable HWCAP_CPUID on aarch64. There is just one
> change from the previous version:
>
> The first patch now reworks the internal tunables API to make it more
> straightforward with just TUNABLE_GET and TUNABLE_SET instead of the
> arbitrary TUNABLE_SET, TUNABLE_GET, TUNABLE_UPDATE, etc. The API
> should now be more straightforward and predictable to use. This also
> fixes the problem of hwcap_mask not being read when it is not set
> externally.
>
> Testing:
>
> - The patches don't introduce any testsuite regressions on x86_64 and
> aarch64
> - I ran the dynamic linker under gdb and verified that the hwcap_mask is
> read correctly and that MIDR is read correctly
> - I ran 'LD_SHOW_AUXV=1 elf/ld.so --library-path .:elf:nptl /bin/true'
> to verify that the hwcaps are read correctly.
>
> Siddhesh Poyarekar (6):
> tunables: Clean up hooks to get and set tunables
> tunables: Add LD_HWCAP_MASK to tunables
> tunables: Use glibc.tune.hwcap_mask tunable instead of _dl_hwcap_mask
> aarch64: Allow overriding HWCAP_CPUID feature check using HWCAP_MASK
> Make LD_HWCAP_MASK usable for static binaries
> aarch64: Add hwcap string routines
>
> README.tunables | 69 +++++++++++++++++----
> elf/Versions | 2 +-
> elf/dl-cache.c | 5 +-
> elf/dl-hwcaps.c | 11 +++-
> elf/dl-hwcaps.h | 30 +++++++++
> elf/dl-support.c | 2 +
> elf/dl-tunables.c | 58 ++++++++++-------
> elf/dl-tunables.h | 53 ++++++++++------
> elf/dl-tunables.list | 7 +++
> elf/rtld.c | 4 ++
> malloc/arena.c | 20 +++---
> manual/tunables.texi | 23 +++++++
> scripts/gen-tunables.awk | 1 +
> sysdeps/generic/ldsodefs.h | 2 +
> sysdeps/sparc/sparc32/dl-machine.h | 6 +-
> sysdeps/unix/sysv/linux/aarch64/cpu-features.c | 10 +--
> sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c | 15 +++++
> sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h | 86 ++++++++++++++++++++++++++
> sysdeps/x86/cpu-features.c | 10 +--
> 19 files changed, 339 insertions(+), 75 deletions(-)
> create mode 100644 elf/dl-hwcaps.h
> create mode 100644 sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h
>