== This Week ==
* LLVM
- LLVM-611 (Tune heuristic for blx): Posted upstream.
- LLVM-612 (Redundant reg moves for 8-bit immediates): WIP patch
* Public Holiday
- one day off
== Next Week ==
- Continue with LLVM tasks
- Start looking at GNU-659
VirtIO Related Work ([VIRT-366])
================================
- minor planning work
- need a few slides with virtio architectures for Victor
- a overview blogpost for Ebba
[VIRT-366] <https://projects.linaro.org/browse/VIRT-366>
Upstream Work ([VIRT-109])
==========================
- GSoC feedback on proposals
- we have 3 students putting forward proposals for TCG cache plugin
- posted [PATCH] hw/core: properly terminate loading .hex on EOF
record Message-Id: <20200401193849.14017-1-alex.bennee(a)linaro.org>
- posted [PATCH] target/arm: don't expose "ieee_half" via gdbstub
Message-Id: <20200402143913.24005-1-alex.bennee(a)linaro.org>
- posted [PATCH for 5.0 v2 00/10] A selection of sanitiser fixes
Message-Id: <20200401094759.5835-1-alex.bennee(a)linaro.org>
- the linux-user guest map is better targeted at next week
- posted [PATCH v3 for 5.0-rc2 00/12] a selection of random fixes
Message-Id: <20200403191150.863-1-alex.bennee(a)linaro.org>
[VIRT-109] <https://projects.linaro.org/browse/VIRT-109>
Completed Reviews [1/1]
=======================
[PATCH for-5.0 v3 0/7] configure: Improve PIE and other linkage
Message-Id: <20200327220353.27233-1-richard.henderson(a)linaro.org>
Absences
========
- Splitting time between work and home-schooling
Current Review Queue
====================
* [PATCH v4 00/10] tests/vm: Add support for aarch64 VMs
Message-Id: <20200312142728.12285-1-robert.foley(a)linaro.org>
Added: <2020-03-27 Fri>
* [PATCH v8 00/74] per-CPU locks
Message-Id: <20200326193156.4322-1-robert.foley(a)linaro.org>
Added: <2020-03-27 Fri>
* [virtio-dev] [RFC PATCH] virtio-iommu: Add PAGE_SIZE_MASK property
Message-Id: <20200323133831.2110014-1-jean-philippe(a)linaro.org>
Added: <2020-03-27 Fri>
* [virtio-dev] [PATCH v2 00/10] virtio-mem: paravirtualized memory
Message-Id: <20200311171422.10484-1-david(a)redhat.com>
Added: <2020-03-27 Fri>
--
Alex Bennée
Progress:
* VIRT-65 [QEMU upstream maintainership]
- More freeze related wrangling...
* VIRT-241 [QEMU ISA Support for A-profile]
- pushed the ARMv8.2-TTS2UXN patchset out to the mailing list
- found and fixed a bug in our PAN support where we were making
PSTATE.PAN forbid execute access, not just data access
* VIRT-364 [QEMU support for ARMv8.1-M extensions]
- Started on some preliminary refactoring that we'll need so we can
more conveniently modify the decoder for v8.1M: converting the
A32/T32 Neon decoder to use decodetree. I've done the "post-v8.0
extensions" instructions, and started on the loads-and-stores.
thanks
-- PMM
Hi,
We are having some serious problems after we upgraded from C++14 to C++17
on an Jetson TX2 ARM device. Our system tests started to behave differently
and fail.
It seems that when our application uses a library (also developed by us)
some data gets corrupted when delivered to a class constructor. For
example, the .second of and std::pair<float> appears to be the .first and
the .second is garbage. This is deterministic, but different tests are
failing depending on the combination: library C++17/C++14 <-> application
C++14/C++17.
This is on Ubuntu 18.04 and gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04).
Nothing like this happens on Intel.
So:
ARM, C++14: OK
Intel, C++14: OK
ARM, C++17: FAIL
Intel, C++17: OK
Any ideas what could cause this? I know this is a bit vague, but this a
commercial, closed-source application so I cannot yet give any other
information.
BR,
Jussi Lind
[VIRT-349 # QEMU SVE2 Support ]
Posted the first incremental patch set
for review, as requested by Qualcomm.
[VIRT-327 # Richard's upstream QEMU work ]
Patch review, much of it 5.0 related,
but also v6 of the riscv vector patch set.
Revise the PIE and linkage patch set.
r~
== Progress ==
* GCC upstream validation:
- reported a couple of failures/regressions
* GCC:
- comparing testsuite results for cortex-m3 and cortex-m33 with
cortex-a9 to check what cortex-M problem there are. Fixed a few
testcases. Managed to use qemu-system-arm to run cortex-m33 code with
CMSE features. (Thanks to Peter Maydell for the help!)
* misc:
- infra fixes / troubleshooting / reviews
== Next ==
* FDPIC GDB
* GCC/cortex-M
Progress:
* VIRT-65 [QEMU upstream maintainership]
- Softfreeze this week, so a lot of pull request handling, and
one last small arm pullreq to put together and send out
- Our Coverity Scan setup was broken (the person who usually does
the builds updated his machine to a newer Fedora which broke the tool).
I pulled up an old patchset I had from a year ago which scripts things
so you can do a build-and-upload automatically via Docker so that
we're not dependent on one person for this. This took longer than I
expected as there were a bunch of things that needed fixing both in
the scripting and in bits of the codebase that the tools warned about.
Patch series sent.
- When we did get a Coverity run through, it reported 112 new issues;
spent some time going through and triaging them (lots of false positives
but also lots of real bugs) and submitting patches for some of them.
* VIRT-364 [QEMU support for ARMv8.1-M extensions]
- sketched out the work required and created some 'story' level
cards to go under the epic. Still open questions:
+ should we model Cortex-M55 or a more generic 'max' CPU?
+ what board model do we want to use?
+ does LITE have any guest code using v8.1M features for testing?
Random notes:
* my new desk chair and standing desk arrived this week
(the latter still needs assembling...) so I am gradually
improving the rough edges of my WFH setup.
thanks
-- PMM
== Progress ==
* Out of office 1 day
* More Morello
- Patch set for the 'disassemble' command in review
- Working on the final part of the capability formatting
== Plan ==
* More Morello
Progress:
[VIRT-349 # QEMU SVE2 Support ]
10 of N insn groups implemented.
Annoyingly, there doesn't seem to be a summary of new insns, so confirming that
all of the insns have been implemented.
[VIRT-327 # Richard's upstream QEMU work ]
Patch review. Mostly Phil's arm --disable-tcg set.
Cleanup for some of the new Coverity reports.
Flush tcg patch queue.
[GCC]
Two revisions improving TImode comparisons for aarch64 (PR94174).
https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542447.html
[Kernel]
Follow-up on a discussion a few weeks ago re __range_ok. The gcc cmpti patch
set is in support of that, but I also found a much better solution for constant
sized checks.
http://lists.infradead.org/pipermail/linux-arm-kernel/2020-March/719754.html
r~
