SVE Support ([VIRT-198])
========================
- continued looking into Nils's SVE enabled Test_simd from Grid
failure
- __attribute__((noinline)) makes it go away, so subtle code
difference
- looking through side-by-side traces to find where it went wrong
- posted {RFC PATCH 0/4} add hand-rolled fallback when capstone
fails Message-Id: <20180808123934.17450-1-alex.bennee(a)linaro.org>
- finally fixed after Laurent's review comments - see [rth's …
[View More]latest
branch]
[VIRT-198] https://projects.linaro.org/browse/VIRT-198
[rth's latest branch]
https://github.com/stsquad/qemu/tree/testing/tgt-arm-sve-c
SVE Reviews
- reviewed {PATCH 00/11} target/arm: sve linux-user patches
Message-Id: <20180809034033.10579-1-richard.henderson(a)linaro.org>
- started reviewing {PATCH 00/20} target/arm: sve system mode patches
Message-Id: <20180809042206.15726-1-richard.henderson(a)linaro.org>
Upstream Work ([VIRT-109])
==========================
- posted {RFC PATCH 0/3} Tweaks to linux-user -dfilter Message-Id:
<20180809175553.18479-1-alex.bennee(a)linaro.org>
- posted {RFC PATCH 0/3} tweaks for QEMU's C standard Message-Id:
<0180810171102.16451-1-alex.bennee(a)linaro.org>
[VIRT-109] https://projects.linaro.org/browse/VIRT-109
Other Tasks
===========
- Submitted "My Other Machine is Virtual" abstract for YVR18
- this talk has been accepted
- Drafted the [Instrumentation EPIC]
- started added stories for various use-cases
[Instrumentation EPIC] https://projects.linaro.org/browse/TCWG-1457
Completed Reviews [1/1]
=======================
{PATCH 00/11} target/arm: sve linux-user patches
Message-Id: <20180809034033.10579-1-richard.henderson(a)linaro.org>
- CLOSING NOTE [2018-08-09 Thu 12:44]
Looks good, tested on a bunch of stuff
Absences
========
- Holiday (16th-28th August 2018)
- YVR18 Connect (17th-21st September 2018)
- KVM Forum 2018 (24th-26th October 2018)
Current Review Queue
====================
* {PATCH 00/20} target/arm: sve system mode patches
Message-Id: <20180809042206.15726-1-richard.henderson(a)linaro.org>
* {PATCH 0/5} tests/vm: Improvements when KVM is not available
Message-Id: <20180717024827.27897-1-f4bug(a)amsat.org>
* {RFC PATCH 00/12} tests/tcg: Add TriCore tests
Message-Id: <20180501142222.19154-1-kbastian(a)mail.uni-paderborn.de>
* {PATCH v4 00/14} fp-test + hardfloat
Message-Id: <1528768140-17894-1-git-send-email-cota(a)braap.org>
* {Qemu-devel} {RFC PATCH v2 0/7} QEMU binary instrumentation prototype
Message-Id: <152819515565.30857.16834004920507717324.stgit@pasha-ThinkPad-T60>
* {Qemu-devel} {RFC v2 0/2} Add BPF suuport to Qemu
Message-Id: <20180625110706.23332-1-sameeh(a)daynix.com>
--
Alex Bennée
[View Less]
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ found and fixed a last minute couple of bugs with VM migration
for Arm guests, one in the GICv3 and one for M-profile CPUs
+ triaging and applying fixes for last few rc4 bugs
+ sent a patch to make our checkpatch script catch multiline comment
style issues
+ LP:1777672: investigating reported bug in raspi framebuffer emulation
* VIRT-164 [improve Cortex-M emulation]
+ finished, tested, and sent patchset that implements the …
[View More]Master Security
Controller and adds the PL081 DMA and MSCs to the MPS2 AN505 board
+ wrote patches that add the PL022 SPI controllers to the AN505
(fixing some PL022 bugs in the process)
* finished sorting out last bits of travel for Connect and KVM Forum
* various JIRA ticket scrub/fettling
thanks
-- PMM
[View Less]
=== Work done during this week ===
* TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed
+ fix issues seen on x86_64 and start a bigger round of testing
* TCWG-1337 / LLVM PR34170: last patch committed to trunk
+ address review comments and commit it once approved, then request
backport to LLVM 7 branch
* Submit and commit patch to clarify what tm.texi needs copying when
tm.texi.in is updated in source tree
* Misc:
+ Linaro syncs
+ 2 days and a half of Linaro JIRA gardening
=== …
[View More]Plan for week 33 ===
* Enable regression testing of Linaro release process
* DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments
+ continue to rework patch
* GCC PR85434 / CVE-2018-12886: rework needed
+ confirm all regressions are fixed
+ finish testing and submit for review
* Try to reproduce perf issue mentioned in week #30s weekly report on
latest perf
[View Less]
=== Work done during this week ===
* TCWG-1379 / GCC PR85434 / CVE-2018-12886: rework needed
+ commit and revert due to regression on x86 and in glibc for aarch64
-> seems there is at least 2 issues, *sigh*
* TCWG-1337 / LLVM PR34170:
+ track down and fix issue that patch 2/3 uncovered, then reapply 2/3
+ investigate regression from patch 1/3, fixed by patch 3/3
fortunately and believe this is the right fix
* Continue work on TCWG-1428 (Support arithmetic on FileCheck regex variable)…
[View More]:
+ start rework patch to follow new syntax and accept numeric
expressions with several variables
* Linaro PR3943:
+ investigate issue, propose several workarounds to customer and
raise need for GCC release with combined multilib
* Misc:
+ Linaro syncs
+ bits of Linaro JIRA gardening
+ new ask question button and typo fix on developer.arm.com's GNU RM page
+ prepare Linaro Connect
=== Plan for week 32 ===
* Summarize state of GNU EPIC in JIRA
* Enable regression testing of Linaro release process
* DSGHACK-25 (Support arithmetic on FileCheck regex variable): address comments
+ continue to rework patch
* GCC PR85434 / CVE-2018-12886: rework needed
+ investigate regressions
* Try to reproduce perf issue mentioned in last weekly report on latest perf
[View Less]
*very short week (1 day) *
== Progress ==
* FDPIC
- uClibc-ng: posted v2 patches
* GCC upstream validation:
- looking at some random noise in testing
- reported a couple of regressions
* Infrastructure:
- misc cleanups
* misc (conf-calls, meetings, emails, ....)
== Next ==
Holidays: back on Aug 29th
o LLVM
* Machine Outliner on ARM prototype:
- Working on saving LR in a register support
- Working on stack fixups mechanism
* libcxxabi exception address alignment test failure:
- Fix submitted upstream
o Misc
* Various meetings and discussions.
== Progress ==
* FDPIC
- uClibc-ng: investigated regression in non-FDPIC code, preparing v2 patches
* GCC upstream validation:
- looking at some random noise in testing
- reported a couple of regressions
* Infrastructure:
- misc cleanups
* misc (conf-calls, meetings, emails, ....)
== Next ==
1-day week, the holidays. Back on Aug 29th
[VIRT-198 # QEMU: SVE Emulation Support ]
Fixed 4 bugs pointed out by Laurent on list.
Dump sve state with -d fpu.
[VIRT-249 # SVE System Mode ]
Clear sve state on vector length change on EL change.
[Upstream]
Finished v5 review of nanomips.
Fixed 4 sparc clone bugs.
Fixed a ppc fp load/store bug I introduced in June.
[Glibc]
Adjusted _dl_runtime_resolve and friends for the new ARM vector ABI;
posted for comment. ARM folk pointed out that I'd have to save even
more state than that, and …
[View More]really the compiler needs fixing to avoid
the PLT completely. The right people are talking about the problem.
r~
[View Less]
SVE Support ([VIRT-198])
========================
- traced the svetest failure from Naoki @ Naist to SVE ABI issue with
dynamic linker
- rth has posted [a fix for glibc] and a bug raised for armclang
w.r.t. noplt
- looking into Nils's SVE enabled Test_simd from Grid failure
- __attribute__((noinline)) makes it go away, so subtle code
difference
- looking through side-by-side traces to find where it went wrong
[VIRT-198] https://projects.linaro.org/browse/VIRT-…
[View More]198
[a fix for glibc]
https://sourceware.org/ml/libc-alpha/2018-08/msg00017.html
SVE Reviews
- reviewed {Qemu-devel} {PATCH 0/4} target/arm sve fixes Message-Id:
<20180801123111.3595-1-richard.henderson(a)linaro.org>
QEMU ARMv8.3 Support ([VIRT-241])
=================================
- had a [quick run at VHE] which crystallised some of the issues with
register aliasing
- obviously need to sit and think about a design for this
[VIRT-241] https://projects.linaro.org/browse/VIRT-241
[ARMv8.1 Mandatory Features]
https://projects.linaro.org/browse/TCWG-1434
[ARMv8.1 optional features] https://projects.linaro.org/browse/TCWG-1435
[quick run at VHE] https://github.com/stsquad/qemu/tree/add-vhe-rfc
Upstream Work ([VIRT-109])
==========================
- posted {PATCH v1 for 3.0 0/2} fix for bug 1783362 Message-Id:
<20180726132947.28538-1-alex.bennee(a)linaro.org>
- started reviewing {PATCH v5 00/24} Fixing record/replay and adding
reverse debugging Message-Id:
<20180725121311.12867.21729.stgit@pasha-VirtualBox>
- number of build issues need to be resolved
[VIRT-109] https://projects.linaro.org/browse/VIRT-109
Completed Reviews [3/3]
=======================
{PATCH 0/3} linux-user/sparc: Fixes for clone
Message-Id: <20180730201553.32423-1-richard.henderson(a)linaro.org>
- CLOSING NOTE [2018-08-01 Wed 14:35]
Still some issues with the tests
{PATCH v5 00/24} Fixing record/replay and adding reverse debugging
Message-Id: <20180725121311.12867.21729.stgit@pasha-VirtualBox>
- CLOSING NOTE [2018-08-01 Wed 14:36]
Bunch of build failures... gave up.
{Qemu-devel} {PATCH 0/4} target/arm sve fixes
Message-Id: <20180801123111.3595-1-richard.henderson(a)linaro.org>
- CLOSING NOTE [2018-08-02 Thu 10:28]
Looks good, but hasn't solved all remaining problems.
Absences
========
- YVR18 Connect (17th-21st September 2018)
- KVM Forum 2018 (24th-26th October 2018)
Current Review Queue
====================
* {PATCH 0/5} tests/vm: Improvements when KVM is not available
Message-Id: <20180717024827.27897-1-f4bug(a)amsat.org>
* {RFC PATCH 00/12} tests/tcg: Add TriCore tests
Message-Id: <20180501142222.19154-1-kbastian(a)mail.uni-paderborn.de>
* {PATCH v4 00/14} fp-test + hardfloat
Message-Id: <1528768140-17894-1-git-send-email-cota(a)braap.org>
* {Qemu-devel} {RFC PATCH v2 0/7} QEMU binary instrumentation prototype
Message-Id: <152819515565.30857.16834004920507717324.stgit@pasha-ThinkPad-T60>
* {Qemu-devel} {RFC v2 0/2} Add BPF suuport to Qemu
Message-Id: <20180625110706.23332-1-sameeh(a)daynix.com>
* {PATCH 0/4} tests/vm: various trivial fixes
Message-Id: <20180628153535.1411-1-f4bug(a)amsat.org>
--
Alex Bennée
[View Less]
[TCWG-1450] Support for Tag_ABI_VFP_args in LLD
Needed by FreeBSD in order to switch to LLD for Arm.
[TCWG-1451] Support for v5 and v6 Arm in LLD
Tidied up and submitted patches for v5/v6 (branch encoding and
compatible thunks), in upstream review.
[TCWG]
- Started doing some Jira gardening in preparation for status report
- Went back to libfuzzer hang on AArch64 buildbot. Looks like failure
to converge on -O2 and above, from the logs and code-generation I
suspect that it isn't handling the …
[View More]CINC instruction well (not
increasing coverage when the condition passes).
[View Less]
