4 day week.
[VIRT-327 # Richard's upstream QEMU work ]
Bug hunting vs aa32 ldrex/strex. I had hoped it would be relatively easy to
reproduce -- just run something from the .NET testsuite -- but even getting
that far wasn't obvious. So I put that aside; let's see if Peter's request for
an actual reproducer gets results.
Bug hunting vs aa64 gcc sync-4.c as reported by clyon. I determined that it's
not the fault of the null-pointer dereference, and that something goes wrong
somewhere in libgcc's exception unwind prior to the c++ throw. But it doesn't
fail all of the time. And worse, the problem vanishes when randomize_va_space
is disabled. So I can neither get a "good" vs "bad" trace without needless
differences nor produce a failure under gdb. I should try again with rr and
see if that works...
r~
Linaro folks - why is this buildbot sending mail when it's already red
(looks like this buildbot has been red for a while, at least 11187
seems to be red for the same reason that 11188 is red - so the people
on this blame list aren't relevant)? That adds noise to the buildbot
results & makes it harder for developers to find actionable email.
On Mon, Jul 6, 2020 at 9:30 PM <llvm.buildmaster(a)lab.llvm.org> wrote:
>
> The Buildbot has detected a new failure on builder clang-cmake-armv7-full while building llvm.
> Full details are available at:
> http://lab.llvm.org:8011/builders/clang-cmake-armv7-full/builds/11188
>
> Buildbot URL: http://lab.llvm.org:8011/
>
> Buildslave for this Build: linaro-tk1-08
>
> Build Reason: scheduler
> Build Source Stamp: [branch master] 0c6b6e28e70c06a3cb4704d2d8f90829a689e230
> Blamelist: Amara Emerson <amara(a)apple.com>,Amy Kwan <amy.kwan1(a)ibm.com>,Biplob Mishra <biplmish(a)in.ibm.com>,David Blaikie <dblaikie(a)gmail.com>,Eric Christopher <echristo(a)gmail.com>,Jordan Rupprecht <rupprecht(a)google.com>,LLVM GN Syncbot <llvmgnsyncbot(a)gmail.com>,Nico Weber <thakis(a)chromium.org>,Sanjay Patel <spatel(a)rotateright.com>,Wolfgang Pieb <wolfgang_pieb(a)playstation.sony.com>,Yuanfang Chen <yuanfang.chen(a)sony.com>
>
> BUILD FAILED: failed build stage 2
>
> sincerely,
> -The Buildbot
>
>
>
== Progress ==
* GCC upstream validation:
- reported a few regressions
- added fortran to arm-none-eabi configs
- enabled gcc-testresults for most configurations, which now sends a
lot of emails
* GCC:
- PR94743 (IRQ handler and Neon registers): patch committed.
* benchmarking:
- cleanup of hal lib to run benchmarks on stm32, the board we have in
TCWG is different from the ones we used in ST, I'll have to update the
hal settings accordingly.
* misc:
- switch tcwg_gnu job to use our gcc-compare-results script, to be
able to ignore some tests with random results (especially under qemu)
== Next ==
* GCC/cortex-M testing improvements & fixes
* cortex-m benchmarking
[VIRT-344 # ARMv8.5-MemTag, Memory Tagging Extension ]
Lots of work here, finally merging MTE system support.
[VIRT-349 # QEMU SVE2 Support ]
Posted v2, all 100 patches.
[VIRT-327 # Richard's upstream QEMU work ]
A fair amount of patch review.
Merged the decodetree exclusive groups feature.
r~
== This Week ==
* GCC
- GNU-659 (LTO regressing calculix): Running and analysing benchmarks
with different configs.
* LLVM
- LVM-611 (heuristic to lower calls to blx for armv6-m): Addressing
upstream suggestions.
- LLVM-612 (code-gen for imm8 args for Thumb1): Posted patch upstream,
waiting for feedback.
* Validation
- Prototype script for metric based comparison
== Next Week ==
- Continue ongoing tasks
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ respun the QEMU side of the "fix 32-bit-guest readdir of
ext4 filesystems on a 64-bit host" work to match Linus Walleij's
most recent kernel patch.
+ code review (actually emptied my queue for the first time in forever):
- patchset adding some missing devices to MPS2 boards
- another round of RTH's MTE patchset (now fully reviewed and ready to go in)
- SMMUv3.2 range-invalidation support patchset from RedHat
- RTH's implementation of the kernel MTE ABI for QEMU linux-user
+ had a look at some of the lurking Coverity issues
* VIRT-364 [QEMU support for ARMv8.1-M extensions]
+ fp16 support: started by working out risu patterns for all the
affected instructions so we have a means for testing the changes.
+ implemented a handful of fp16 insns; plan to back-burner this for
a little while as it's not going to be complete before we freeze
for QEMU 5.1, so work like reviewing the MTE patchset and other
for-5.1 efforts will take priority.
NB: on holiday next week
thanks
-- PMM
VirtIO Related Work ([VIRT-366])
================================
- posted [PATCH v2 0/5] some tweaks to the document build process
Message-Id: <20200619204959.7877-1-alex.bennee(a)linaro.org>
Upstream Work ([VIRT-109])
==========================
- posted [PATCH v2] docs/devel: add some notes on tcg-icount for
developers Message-Id:
<20200619170930.11704-1-alex.bennee(a)linaro.org>
[VIRT-109] <https://projects.linaro.org/browse/VIRT-109>
Completed Reviews [7/7]
=======================
[RFC v5 0/4] QEMU cpus.c refactoring
Message-Id: <20200615180346.3992-1-cfontana(a)suse.de>
[PATCH v1 1/2] semihosting: defer connect_chardevs a little more to use serialx
Message-Id: <1592215252-26742-1-git-send-email-frederic.konrad(a)adacore.com>
- CLOSING NOTE [2020-06-16 Tue 16:14]
A little confused as to the purpose of patch 1/2.
Added: <2020-06-15 Mon>
[PATCH 0/5] linux-user: Support extended clone(CLONE_VM)
Message-Id: <20200612014606.147691-1-jkz(a)google.com>
- CLOSING NOTE [2020-06-16 Tue 17:08]
This is super hairy stuff. Would like to know the use case for all
this additional complexity.
Added: <2020-06-12 Fri>
[PATCH v2 00/15] tests/tcg: Add TriCore tests
Message-Id: <20200604085441.103087-1-kbastian(a)mail.uni-paderborn.de>
- CLOSING NOTE [2020-06-16 Tue 18:29]
A few minor comments, v2 should be mergable.
Added: <2020-06-04 Thu>
[PATCH 0/3] Add Scripts for Finding Top 25 Executed Functions
Message-Id: <20200616231204.8850-1-ahmedkhaledkaraman(a)gmail.com>
[RFC] ivshmem v2: Shared memory device specification
Message-Id: <f109fe5a-92eb-e5a5-bb83-ada42b3a9b61(a)siemens.com>
- CLOSING NOTE [2020-06-17 Wed 16:49]
Finally got round to making some comments. All in all looks pretty
sane.
Added: <2020-05-25 Mon>
[PATCH v9 0/9] tests/vm: Add support for aarch64 VMs
Message-Id: <20200601211421.1277-1-robert.foley(a)linaro.org>
Absences
========
- Home-schooling in mornings
Current Review Queue
====================
* [RFC][PATCH v2 0/3] IVSHMEM version 2 device for QEMU
Message-Id: <cover.1578407802.git.jan.kiszka(a)siemens.com>
Added: <2020-04-09 Thu>
* [PATCH v7 00/42] target/arm: Implement ARMv8.5-MemTag, system mode
Message-Id: <20200603011317.473934-1-richard.henderson(a)linaro.org>
Added: <2020-06-18 Thu>
* [PATCH RFC 00/22] Support of Virtual CPU Hotplug for ARMv8 Arch
Message-Id: <20200613213629.21984-1-salil.mehta(a)huawei.com>
Added: <2020-06-13 Sat>
* [PATCH v8 0/4] vhost-user block device backend implementation
Message-Id: <20200604233538.256325-1-coiby.xu(a)gmail.com>
Added: <2020-06-12 Fri>
--
Alex Bennée
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ code review:
- a fix for an A9 global timer device bug
- imx_fec ethernet bugfixes/cleanups
- SD card emulation bugfixes/cleanups (including a CVE fix)
- sm501 graphics card minor fixes
- implementation of qemu_init_exec_dir() for OSX
- patchset adding some missing devices to MPS2 boards
- RTH's v7 MemTag emulation series (this was a big one, took most of
a couple of days to work through)
+ sent docs patch deprecating our tilegx port
+ discussion about what exactly target code has to do
for icount support; wrote some patches to remove some 'gen_io_end()'
calls that turn out to be no-longer-necessary
* VIRT-364 [QEMU support for ARMv8.1-M extensions]
+ completed the neon decodetree conversion and sent the last batch
of patches out for review; plan to start on fp16 support next
NB: have recorded my maintainership work under the old VIRT-65
for now; not yet clear when/which jira issue to use in the new UM-*
hierarchy.
thanks
-- PMM
* Training all week
== Progress ==
* GCC upstream validation:
- reported a few regressions
- enabled sending of some validation results to gcc-testresults mailing-list
* GCC:
- PR94743 (IRQ handler and Neon registers): No feedback yet.
* misc:
- infra fixes / troubleshooting / reviews
- cleanup of hal lib to run benchmarks on stm32
== Next ==
* PR94743
* GCC/cortex-M testing improvements & fixes
* cortex-m benchmarking
* FDPIC GDB
* VIRT-364 [QEMU support for ARMv8.1-M extensions]
+ Good progress with the neon decodetree conversion this week -- now feels
like it's nearly done. Wrote and sent out another couple of patchsets for
review. The only remaining insns to convert are the 2-reg-misc grouping.
Have made a start on that; hope to get the final part of the conversion
out for review next week.
thanks
-- PMM
(0.5 day off)
== Progress ==
* GCC upstream validation:
- scripts updates and cleanup for cortex-m33 with qemu-system-mode
- investigated a random error with a C++ testcase under qemu-aarch64
since I upgraded to qemu-5.0.
- reported a few regressions
- fixed cross-build of GCC after C++11 upgrade, looked at fixing
native builds (different problem), but someone had already posted the
same fix during the week-end
* GCC:
- PR94743 (IRQ handler and Neon registers): No feedback yet.
* misc:
- infra fixes / troubleshooting / reviews
- looking at cortex-m benchmarking harnesses. Updated docker images to
include openocd and checked I could connect to the board from a docker
container.
- helping test Dejagnu new master branch in preparation for next stable release
== Next ==
* training next week
[VIRT-344 # ARMv8.5-MemTag, Memory Tagging Extension ]
Posted v7 of system mode
Posted v2 of user mode vs in-progress kernel abi.
Some bug fixing for Stephen and Szabolcs.
[VIRT-349 # QEMU SVE2 Support ]
Started reviewing Stephen's sve2 risu patches.
[VIRT-327 # Richard's upstream QEMU work ]
A fair amount of patch review
New version of decodetree exclusive groups.
Some work on clang 10 werrors.
r~
Short week (1.5 day off)
== Progress ==
* GCC upstream validation:
- scripts updates and cleanup for cortex-m33 with qemu-system-mode
- reported a few regressions
* GCC:
- PR94743 (IRQ handler and Neon registers): No feedback yet.
* misc:
- infra fixes / troubleshooting / reviews
- looking at cortex-m benchmarking harnesses, at last able to run
coremark stm32 board
== Next ==
* GCC validation
- switch to qemu-system-mode for cortex-m33, in order to run the cmse tests
* PR94743
* GCC/cortex-M testing
* cortex-m benchmarking
* FDPIC GDB
== Progress ==
* GCC upstream validation:
- scripts updates and cleanup
- new scheme for arm-eabi now in production (cortex-a7 in arm and
thumb modes, cortex-m[0347,33]
- upgraded to qemu-5.0
- reported a few regressions
* GCC:
- PR94743 (IRQ handler and Neon registers): No feedback yet.
* misc:
- infra fixes / troubleshooting / reviews
- looking at cortex-m benchmarking harnesses, at last able to run a
sample code on my small stm32 board
- internal meetings / paperwork
== Next ==
* GCC validation
- switch to qemu-system-mode for cortex-m33, in order to run the cmse tests
* PR94743
* GCC/cortex-M testing
* cortex-m benchmarking
* FDPIC GDB
[VIRT-339 # ARMv8.5-BTI, Branch Target Identification ]
Updated to match the latest kernel for-next/bti-user branch; I hope this is
going to be merged for 5.7.
Posted v9 for review.
[VIRT-349 # QEMU SVE2 Supprt ]
More RISU work to improve support for SVE. Stephen Long has posted some sve2
risu patterns that need reviewing, and I plan to test all of that next week vs
ArmIE.
I had a start on rebasing my current sve2 patch set on master, with lots of
prereqs merged. But stopped in the middle because I realized that I wanted to
get all of the RISU work done first, so that I can test each patch as it is
updated.
r~
PS: Out all next week on holiday.
Progress:
* VIRT-65 [QEMU upstream maintainership]
- Various bits of code review; put together and sent another
arm pullreq.
* VIRT-364 [QEMU support for ARMv8.1-M extensions]
- Fixed up the 2-reg-shift/1-reg-imm patchset as per code review
comments and sent a v2
thanks
-- PMM
[VIRT-344 # ARMv8.5-MemTag, Memory Tagging Extension ]
Some prerequisites merged upstream.
[VIRT-349 # QEMU SVE2 Support ]
Some prerequisites merged upstream.
Work on risu to compress sve output files.
Split out the crypto conversion to gvec.
[VIRT-327 # Richard's upstream QEMU work ]
Posted some softfloat cleanups.
Some patch review.
Support non-overlapping regions for decodetree.
r~
VirtIO Related Work ([VIRT-366])
================================
VirtiIO blogpost ([LBO-2])
- finished final version of draft with future work and call to action
[LBO-2] <https://projects.linaro.org/browse/LBO-2>
Upstream Work ([VIRT-109])
==========================
- posted [PATCH v1 0/8] plugins/next (cleanup, cpu_index and lockstep)
Message-Id: <20200513173200.11830-1-alex.bennee(a)linaro.org>
- posted [PATCH v1 00/10] testing and tcg tweaks Message-Id:
<20200513175134.19619-1-alex.bennee(a)linaro.org>
- posted [PULL v2 00/13] testing, tcg and plugin updates Message-Id:
<20200515144405.20580-1-alex.bennee(a)linaro.org>
[VIRT-109] <https://projects.linaro.org/browse/VIRT-109>
Completed Reviews [9/9]
=======================
[PATCH 0/4] softfloat: fix floatx80 emulation bugs
Message-Id: <alpine.DEB.2.21.2005010034560.30535(a)digraph.polyomino.org.uk>
[PATCH v2 0/4] softfloat: fix floatx80 emulation bugs
Message-Id: <alpine.DEB.2.21.2005042332380.22972(a)digraph.polyomino.org.uk>
- CLOSING NOTE [2020-05-11 Mon 08:16]
rth already pulled into his tree
Added: <2020-05-05 Tue>
[PATCH v4 00/10] tests/vm: Add support for aarch64 VMs
Message-Id: <20200312142728.12285-1-robert.foley(a)linaro.org>
- CLOSING NOTE [2020-05-11 Mon 10:22]
Generally looks ok but awaiting v11 to deal with re-base conflicts
to fully test.
Added: <2020-03-27 Fri>
[PATCH v8 00/74] per-CPU locks
Message-Id: <20200326193156.4322-1-robert.foley(a)linaro.org>
- CLOSING NOTE [2020-05-12 Tue 19:39]
A few minor comments but looking good. Ran stress testing.
Added: <2020-03-27 Fri>
[PATCH 0/3] plugins: Move declarations around and rename 'hwaddr' argument
Message-Id: <20200510171119.20827-1-f4bug(a)amsat.org>
- CLOSING NOTE [2020-05-12 Tue 19:45]
Queued to my tree
Added: <2020-05-10 Sun>
[PATCH 3/3] plugins: avoid failing plugin when CPU is inited several times
Message-Id: <CAEme+7FPF+inSJSXQPmuv8Up3Eam0N7fT03zqM-RvcvKsxjfVQ(a)mail.gmail.com>
- didn't apply but found bug in cpu_index code
[PATCH 0/5] docs/system: Document some arm board models
Message-Id: <20200507151819.28444-1-peter.maydell(a)linaro.org>
[PATCH v6 0/9] tests/vm: Add support for aarch64 VMs
Message-Id: <20200512193340.265-1-robert.foley(a)linaro.org>
- CLOSING NOTE [2020-05-15 Fri 18:31]
Ran into problems testing on my Gentoo box, sent some patches to
rf-fw
Added: <2020-05-12 Tue>
[PATCH 0/5] target/i386: fxtract, fscale fixes
Message-Id: <alpine.DEB.2.21.2005070038550.18350(a)digraph.polyomino.org.uk>
- CLOSING NOTE [2020-05-15 Fri 18:32]
Testing bit looks ok, leaving the x86 side to people that understand
it.
Added: <2020-05-15 Fri>
--
Alex Bennée
