o 4 days week.
o LLVM
* 7.0.1-rc2:
- Miscompare on AArch64 is related to host compiler, still digging.
* Machine Outliner on ARM prototype:
- IR Outliner experiments:
Commented upstream, and reducing problematic test case.
o Misc
* Various meetings and discussions.
Four day week (Happy Thanksgiving, all you Europeans)
[Upstream]
Posted patches making bswap during qemu_ld/st optional. The prompt was
reviewing the tcg/riscv/ patch set, but I've wanted to do this for ages.
This should avoid the need for reservation of scratch registers on some hosts
that can ill afford it -- in particular i386 and aa32.
In the process I ran into two other places that x86 used those scratch
registers: stores from non-q-registers and bsd-user.
I included patches for both of those (freebsd only; net/openbsd will work so
long as guest_base == 0 and will abort at runtime otherwise).
I still need to audit the other hosts before dropping the call-clobbering from
user-only within tcg.c.
r~
== Progress ==
* FDPIC
- Cortex-M uClibc-ng patch merged
- GCC: no feedback yet on v4 patches
* GCC upstream validation:
- reported a few regressions
- dealing with some random results, again
- trying qemu-3.1.0-rc1, maybe some memory consumption problems, tbc
* GCC:
- bug report on aarch64 about misaligned accesses. I do not have
access to LHG gerrit, Maxim will look at isolating the problem.
- rebased ubsan / bare-metal patches. Really need to look at how to
merge them into LLVM
* misc (conf-calls, meetings, emails, ....)
- reviewing infra script patches
- ran Spec2006 using gcc-8.2 sysroot, to avoid differences caused by
glibc versions. Fortran benchmarks could not run when compiled with
gcc-5/gcc-6 because libgfortran changed .so version compared to gcc-8.
== Next ==
FDPIC:
- GCC: handle feedback on v4 patches
- uclibc-ng: look at how to test fdpic mode with openadk
Benchmarks:
- collect results
Validation:
- check if qemu-3.1.0-rc1 is OK for my GCC validations
[LLVM-486] Error id user defines _GLOBAL_OFFSET_TABLE_ (upstream review)
[LLVM-484] Fix linker script dynamic relocations combination into a single
output section (upstream review)
[LLVM-483] cortex-a53 erratum fix interaction with TLS relaxation (upstream
review)
[LLVM-489] Measure (cross) linking performance of LLD for AArch64 and Arm.
Looking for large projects that I can build for Arm and AArch64
- Firefox seems to have some ARM Android cross build support but it does
not appear to be working too well.
- Chrome can cross build to ARM and AArch64 Android. Have been able to
build AArch64 so far.
Notably both projects don't support building natively on AArch64, there are
quite a few build dependencies for which only x86 support is available.
Raised Jira tickets for recent PRs fixed
2019 Planning
- Drafted objectives document for LLVM team
- Drafted some Jira suggestions for TCWG
QEMU Tooling ([VIRT-252])
=========================
[VIRT-252] https://projects.linaro.org/browse/VIRT-252
QEMU plugin support ([VIRT-280])
- continued reviewing Emilio's {RFC 00/48} Plugin support Message-Id:
<20181025172057.20414-1-cota(a)braap.org>
- port my example tools to his framework :todo
[VIRT-280] https://projects.linaro.org/browse/VIRT-280
Upstream Work ([VIRT-109])
==========================
- finished reviewing {RFC PATCH v2 00/23} KVM: arm64: Initial support
for SVE guests Message-Id:
<1538141967-15375-1-git-send-email-Dave.Martin(a)arm.com>
[VIRT-109] https://projects.linaro.org/browse/VIRT-109
Other Tasks
===========
- started The QEMU initiative thread Message-Id:
<87wop4gezg.fsf(a)linaro.org> for JIRA discussion
Completed Reviews [3/3]
=======================
{RFC PATCH v2 00/23} KVM: arm64: Initial support for SVE guests
Message-Id: <1538141967-15375-1-git-send-email-Dave.Martin(a)arm.com>
- CLOSING NOTE [2018-11-22 Thu 15:36]
My only major concern is if the query API is too gold plated.
{RFC PATCH 0/2} docker: Add gentoo-mipsr5900el-cross image
Message-Id: <20181118203312.5376-1-f4bug(a)amsat.org>
{PATCH} docker: dockerfile for openSUSE Leap
Message-Id: <87k1lai2vo.fsf(a)linaro.org>
Absences
========
- Christmas Holidays
- Connect BKK19 (1-5th April 2019)
Current Review Queue
====================
* {RFC 00/48} Plugin support
Message-Id: <20181025172057.20414-1-cota(a)braap.org>
* {Qemu-devel} {PATCH for-4.0 v2 00/37} tcg: Assorted cleanups
Message-Id: <20181123144558.5048-1-richard.henderson(a)linaro.org>
* {Qemu-arm} {PATCH v5 00/16} gdbstub: support for the multiprocess extension
Message-Id: <20181110081147.4027-1-luc.michel(a)greensocs.com>
* {Qemu-arm} {PATCH 00/13} Support disabling TCG on ARM
Message-Id: <20181113165247.4806-1-sameo(a)linux.intel.com>
* {PATCH 0/7} Acceptance Tests: basic architecture support
Message-Id: <20181004151429.7232-1-crosa(a)redhat.com>
* {PATCH v7 00/19} Fixing record/replay and adding reverse debugging
Message-Id: <20181010133333.24538.53169.stgit@pasha-VirtualBox>
--
Alex Bennée
Progress:
* VIRT-65 [QEMU upstream maintainership]
- release work
- code review
- sent patch fixing Coverity issue in Xen PCI device passthrough
(this was our last outstanding issue with no patch on the list!)
* VIRT-268 [QEMU support for dual-core Cortex-M Musca board]
- some initial investigation of what changes are going to be needed
for heterogenous-cpu support in QEMU
- started on a test case using the existing xnlx-zcu102 board (which
has a heterogenous config that works only by accident)
thanks
-- PMM
== Progress ==
# Monday off
# [LLVM-479] Check current status of GlobalISel
- Looked into new patterns that can be selected by TableGen and
forked LLVM-481 and LLVM-482 out of that
- Ran a test-suite and a selfhost with GlobalISel and had a look at
the fallbacks
# [LLVM-481] [ARM GlobalISel] Test BFC
- Committed upstream
# [LLVM-482] [ARM GlobalISel] Enable CLZ
- Most of the work is done, ready to commit next week
== Plan ==
Wrap up LLVM-482 and LLVM-479
Fork more stories out of LLVM-479
The Linaro Toolchain Working Group (TCWG) is pleased to announce the
2018.11 snapshot of Linaro GCC 6 source package.
o This Linaro GCC 6 snapshot[1] is based on FSF GCC 6.5+svn265890 and
includes performance improvements and bug fixes backported from
mainline GCC. This snapshot will be part of the final maintenance release,
as the upstream GCC 6 branch is at the end of its maintenance lifespan.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.5-2018.11/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 6.4+svn265890
o Subscribe to the important Linaro mailing lists and join our IRC channels to
stay on top of Linaro development.
** Linaro Toolchain Development "mailing list":
http://lists.linaro.org/mailman/listinfo/linaro-toolchain
** Linaro Toolchain IRC channel on irc.freenode.net at @#linaro-tcwg@
* Bug reports should be filed in Bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* Interested in commercial support? inquire at "Linaro support":
mailto:support@linaro.org
[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
Mark Murray Staff Software Engineer | Arm
. . . . . . . . . . . . . . . . . . . . . . . . . . .
p: +44 1223 405082
arm.com <http://www.arm.com>
IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
o 4 days week.
o LLVM
* 7.0.1-rc2:
- Uploaded ARM and AArch64 binaries
- Investigating miscompare on AArch64
* Machine Outliner on ARM prototype:
- IR Outliner experiment gave interesting code size reduction
o Misc
* Various meetings and discussions.
* CI patch reviews
Three day week.
[GNU-180 # Fix gcov crash on program exit]
Fiddled around with TI-RTOS for a while before I realized that was sort of
beside the point. Gave the reporter a method do avoid dumping during the
global destructors. Still need to look into where the reported stack space
problem might be.
[Upstream]
Out-of-line softmmu patches got some work. Added ppc64 support. Fixed a race
and a code removal crash. Emilio verified -5% aa64 boot+shutdown time, but it
performed less well on spec2006.
Reviewed risc-v host patch set.
r~
