== Progress ==
* GCC:
- FDPIC: handling feedback.
* GCC upstream validation:
- no issue to report this week.
* Binutils:
- Non-contiguous memory regions support in the BFD linker: not started yet.
* misc:
- infra fixes / troubleshooting
- qemu-4.1 confirmed OK for GCC validations
- trying validations for cortex-m33, found a few issues in GCC and a
small one in QEMU
- a bit of Jira
== Next ==
GCC:
- handle feedback on FDPIC patches
- binutils/linker support for non-contiguous memory regions
- GNU-583
- GCC upstream validation: Add a config for cortex-m33 (v8-m)
- Reorganised buildbots to remove some of the duplication between v7
and v8 AArch32 to free up more v7 hardware.
- Got final code-size information and wrote my slides for Linaro Connect
- Track down an AArch64 specific LLD problem due to a recent change,
now resolved.
- Wrote worst case thunk/veneer convergence patch to help move through
an iterative symbol assignment algorithm.
UK Bank Holiday Monday
== This Week ==
* GCC :
(i) PR83756: Addressing feedback from upstream.
(ii) PR90724: Committed to trunk.
(iii) PR91272: Started working on patch.
(iv) PR88839: Merged fix from sve-acle-branch to trunk.
* Validation
(i) Patch to separate build and test steps in tcwg_gnu.
(ii) SVE validation
== Next Week ==
- Continue ongoing tasks
== Progress ==
* Investigate running benchmarks in containers [TCWG-1513]
- Discussed the noise levels with the team and we decided to
continue with this
- mcf hangs, need to investigate the cause
- WIP: cleaning up the scripts so I can send a sensible patch for review
* IR SVE reviews [LLVM-545]
- Looked at some patches but didn't have much to add to what other people said
* SVE IR fuzzer [LLVM-586]
- Started prototyping
- The fuzzer relies a lot on inserting constants, and since we can't
produce SVE constants yet I'll have to dig in and get it to also use
function parameters
- Need to add operation descriptions for SVE
* Buildbot babysitting
- Reported an issue
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ unfortunately a late-breaking security-bug meant we needed an rc5, but
we put out the final 4.1.0 release on Thursday
+ code review:
- RTH's set of minor cleanups to the 32-bit arm codegen
+ sent out patches which fix our emulation of ATS instructions so
they cause exceptions when the spec says they should (a cleanup
of a change I'd half-implemented a year or so ago)
+ put together and sent the first target-arm pullreq for 4.2
* booked travel/hotel for KVM Forum; did some other prep like working
out a preliminary list of QEMU Summit invitees, and emailing people
whose GPG keys I need to sign to find out if they're going.
thanks
-- PMM
* Thursday off
== Progress ==
* GCC:
- FDPIC: handling feedback.
- noinit attribute: committed (ld patch too)
* GNU-583 (Fix Linux kernel built for Thumb-2 with GCC using LTO)
- no progress this week
* GCC upstream validation:
- a few issues reported this week.
* Binutils:
- Non-contiguous memory regions support in the BFD linker: not started
yet.
* misc:
- infra fixes / troubleshooting
== Next ==
GCC:
- handle feedback on FDPIC patches
- binutils/linker support for non-contiguous memory regions
- GNU-583
- GCC upstream validation: Add a config for cortex-m33 (v8-m)
QEMU Tooling ([VIRT-252])
=========================
QEMU plugin support ([VIRT-280])
- continued working through v4 comments on [next version branch]
- did some benchmarking to justify no fast path in translator_ld
[VIRT-280] https://projects.linaro.org/browse/VIRT-280
[next version branch]
https://github.com/stsquad/qemu/tree/plugins/plugins-v5
GSoC Mentoring ([VIRT-348])
- spent some time reviewing the current state and experimenting
[VIRT-348] https://projects.linaro.org/browse/VIRT-384
Upstream Work ([VIRT-109])
==========================
- more work on [my docker fixup branch]
- now can run make docker-test-build on qemu-test
- posted {PATCH v3 00/13} softfloat updates (include tweaks, rm LIT64)
Message-Id: <20190813124946.25322-1-alex.bennee(a)linaro.org>
[VIRT-109] https://projects.linaro.org/browse/VIRT-109
[my docker fixup branch]
https://github.com/stsquad/qemu/tree/testing/docker-def-and-buster-fixes
Completed Reviews [6/6]
=======================
{Qemu-devel} {PATCH v5 00/10} Measure Tiny Code Generation Quality
Message-Id: <20190815021857.19526-1-vandersonmr2(a)gmail.com>
- CLOSING NOTE [2019-08-15 Thu 20:45]
Looks pretty good but some racy crashes need to be fixed.
{Qemu-devel} {PATCH v1 0/2} Integrating qemu to Linux Perf
Message-Id: <20190815023725.2659-1-vandersonmr2(a)gmail.com>
- CLOSING NOTE [2019-08-15 Thu 20:46]
Needs a v2 with compile fixes
Absences
========
- Moving house & office ~20th/21st Aug
Current Review Queue
====================
* {PATCH v3 00/34} target/arm: Implement ARMv8.1-VHE
Message-Id: <20190803184800.8221-1-richard.henderson(a)linaro.org>
* {Qemu-devel} {PATCH v4 00/22} target/arm: Implement ARMv8.5-MemTag, system mode
Message-Id: <20190307170440.3113-1-richard.henderson(a)linaro.org>
* {Qemu-devel} {RFC PATCH} Implement qemu_thread_yield for posix, use it in mttcg to handle EXCP_YIELD
Message-Id: <20190717054655.14104-1-npiggin(a)gmail.com>
* {PATCH v3 0/6} tests/docker: add podman support
Message-Id: <20190713143311.17620-1-marcandre.lureau(a)redhat.com>
* {PATCH 0/2} tests/acceptance: Add test of NeXTcube framebuffer using OCR
Message-Id: <20190629150056.9071-1-f4bug(a)amsat.org>
* {Qemu-devel} {PATCH 0/4} Introduce the microvm machine type
Message-Id: <20190628115349.60293-1-slp(a)redhat.com>
--
Alex Bennée
- Fixed LLD segfault when exceptions.
- Implement large code model TLSLD relocations in LLD.
- More thoughts on MOVK prel relocations in the ABI as there looks to
be a use case for them in HWASAN that isn't covered by the existing
relocations.
- Some thoughts on how TCWG LLVM Jira initiatives could be worded and
how we may want to word them in the next cycle.
- Initial thoughts written down on Connect presentation, need to flesh
out more this week.
- Upgraded machine to 18.04, almost managed to break it in the process
but luckily it was recoverable. Will likely have some teething
problems.
o LLVM:
* Machine Outliner:
- Improved stack fixup handling (remove cnadidates when it is not
bebeficial)
- Fixing an issue related to R12 usage.
o Misc
* Various meetings and discussions.
