- linaro-toolchain - lists.linaro.org

by Yvan Roux

o 4 days week. o LLVM * Machine outliner: - Fixed LR save issue, when saved into a register. - Dealing with LR save/restore when outlined region is a pop{...,PC} tail-call. - Investigating potential issue with condition flags. o Misc * Various meetings and discussions.

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending May. 12 2019

by Alex Bennée

QEMU Tooling ([VIRT-252]) ========================= QEMU plugin support ([VIRT-280]) - posted {PULL 0/5} demacro SoftMMU Message-Id: <20190510200101.31096-1-alex.bennee(a)linaro.org> [VIRT-280] https://projects.linaro.org/browse/VIRT-280 Upstream Work ([VIRT-109]) ========================== - more chasing of headers/byteswap/s390x/softfloat bug - could not reproduce but now exact steps have been documented Message-Id: <CAFEAcA8h8ry3XiT1dUOZknTYK78_W=_b3R4CzfFNnS_Z1G9Bww(a)mail.gmail.com> - posted {PATCH v1 00/23} current testing/next queue (docker/system & io tests) Message-Id: <20190509165912.10512-1-alex.bennee(a)linaro.org> - posted {PATCH v3} tests/qemu-iotests: re-format output to for make check-block Message-Id: <20190510102918.2705-1-alex.bennee(a)linaro.org> - posted {PATCH v4} tests/qemu-iotests: re-format output to for make check-block Message-Id: <20190510135247.31278-1-alex.bennee(a)linaro.org> - posted {RFC PATCH} target/arm: semihosting docs, formatting and return clean-ups Message-Id: <20190510191051.5973-1-alex.bennee(a)linaro.org> [VIRT-109] https://projects.linaro.org/browse/VIRT-109 Completed Reviews [1/1] ======================= {Qemu-devel} {PATCH} tests: Force Python I/O encoding for check-qapi-schema Message-Id: <20190506213817.14344-1-ehabkost(a)redhat.com> Other ===== - Student accepted for [GSoC TCG project] [GSoC TCG project] https://wiki.qemu.org/Internships/ProjectIdeas/TCGCodeQuality Absences ======== - A few afternoons between 20-24th May (CBG Beer Festival) Current Review Queue ==================== * {RFC v2 00/38} Plugin support Message-Id: <20181209193749.12277-1-cota(a)braap.org> * {PATCH v9 00/27} gdbstub: Refactor command packets handler Message-Id: <20190502081554.5521-1-arilou(a)gmail.com> * {PATCH 00/13} tests/vm: serial console autoinstall, misc fixes. Message-Id: <20190508085645.11595-1-kraxel(a)redhat.com> * {Qemu-devel} {PATCH 00/26} tcg: Add CPUClass::tlb_fill Message-Id: <20190403034358.21999-1-richard.henderson(a)linaro.org> * {PATCH 0/5} tests/vm: Python 3, improve image caching, and misc Message-Id: <20190329210804.22121-1-wainersm(a)redhat.com> * {Qemu-devel} {PATCH for-4.1 v2 00/36} tcg: Move the softmmu tlb to CPUNegativeOffsetState Message-Id: <20190328230404.12909-1-richard.henderson(a)linaro.org> -- Alex Bennée

6 years, 3 months

1
0
0 0

[Activity] Week ending Friday 10th May 2019

by Peter Smith

[LLVM-158] buildbot maintenance - Increased timeouts on some libfuzzer tests, aarch64 full bots should fail less frequently under load. [LLVM-534] -n -N support in LLD (needed for Linux kernel allyesconfig CI with LLD on AArch64) Rewrote using a different approach after upstream comments [LLVM-122] BTI and PAC support in LLD Wrote an implementation, it compiles, but completely untested as of today.

6 years, 3 months

1
0
0 0

[ACTIVITY] report week ending 10 May

by Peter Maydell

(short week: 3 days) Brief writeup of a pair of talks I attended on Tuesday at the Cambridge University Computer Lab by some people from Amazon: Diana Popa talked about Amazon's new "Firecracker" VMM (virtual machine monitor -- the userspace component that uses the kernel's KVM APIs to create and control virtual machines; kvmtool and QEMU are both VMMs). Their use case is the AWS Lambda service, where VMs are generally fairly short-lived (on the order of hours), startup time matters a lot, and the VMs typically don't need very much CPU/RAM resource. Firecracker is written in Rust, and provides a very simple guest device model (virtio block and network devices), booting a kernel that knows it is virtualized. It boots the kernel directly, without running a BIOS. It has a memory footprint of less than 5MB and a boot time of 125ms. They are currently working on Arm support (they have it booting, but some bits still need work, eg the VM doesn't get the right time because there is no RTC device exposed to the guest). My feeling was that this shows an advantage of the KVM design: the kernel/userspace split makes it easy to replace the userspace VMM part with something customised for the task at hand if you don't need a full-fat all-bells-and-whistles general-purpose solution. Andreea Florescu talked next, about the "rust-vmm" libraries. This is a set of open-source Rust crates which are intended to abstract out some of the common building blocks for VMMs. Firecracker started as a fork of Google's crosvm project, but since the use-case requirements for the two projects are markedly different the code diverged fairly rapidly. rust-vmm is intended to allow the projects to share code for things like "nice Rust interfaces to the KVM ioctls" and "implementations of virtio devices". The project is still in quite an early stage of development -- they have a few crates that have made it to the "stable, published on crates.io" phase, but most are either in "being developed" or still just "planned/proposed/discussed". It's currently Apache-2.0 licensed, but they are planning to dual-license to Apache-2.0 | 3-BSD because Apache-2.0 isn't GPL-2.0 compatible, and they have had some interest in being able to experiment with using these crates with QEMU. (That sounds a bit outlandish but it's actually something I'm planning to look into myself -- the nice thing about Rust is that you can potentially incrementally add it to an existing C codebase without requiring a ground-up rewrite, so allowing security hardening of the more "risky" parts. This is very definitely all still just "exploratory prototyping" though.) Progress: * just miscellaneous upstream stuff thanks -- PMM

6 years, 3 months

1
0
0 0

[ACTIVITY] 6-10 May 2019

by Christophe Lyon

* 1 day off (public holiday) == Progress == * FDPIC - rebased GCC FDPIC patches. Fixing conflict with fstack-protector. * GCC upstream validation: - Fixed ST internal validation broken since GCC bumped to version 10. Still some spurious failures probably caused by NFS. Testing workarounds. - reported a couple of regressions * GCC - ubsan on bare-metal toolchain: no news. * Infra - [stalled] working on adding binutils regression testing to round-robin jobs == Next == FDPIC: - GCC: fix problems with fstack-protector UBSAN/bare-metal: look at how to make it easier to use on CPUs that lack sync primivites (eg cortex-m0)

6 years, 3 months

1
0
0 0

[ACTIVITY] 6 - 10 May 2019

by Prathamesh Kulkarni

== This Week == * PR88837 (9/10) - Addressing review comments from Richard. Coming quite close should hopefully be committed next week. * Misc (1/10) - LLVM Buildbot babysitting - Meetings == Next Week == - Continue ongoing tasks

6 years, 3 months

1
0
0 0

[ACTIVITY] Week 18

by Yvan Roux

o 4 days week. o LLVM * Machine outliner: - Identified an issue related to LR saving inside an outlined chunk, working on a proper fix. o Misc * Various meetings and discussions.

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending 5 May 2019

by Richard Henderson

[VIRT-327 # Richard's upstream QEMU work ] Review Mark's target/ppc getVSR patch set. Two rounds of "tcg vector improvments"; hopefully that's ready to go in on Monday. More work on "bit select" and "compare select" primitives. I can now vectorize Neon VSHL/VSHR variable shift (where positive values are left shift and negative values are right shift). Waiting on posting this while previous tcg vector patch set is still in flight. Review Alex's demacrofy v5. Wrote a boot.S for Alpha. Review David's latest target/s390 vector patch set. Review Sato-san's target/rx v8. Played around with a few disassembler improvements, but I'll not confuse the review process by posting them now. r~

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending May. 5 2019

by Alex Bennée

QEMU Tooling ([VIRT-252]) ========================= [VIRT-280] https://projects.linaro.org/browse/VIRT-280 QEMU plugin support ([VIRT-280]) - posted {PATCH v5 00/15} demacro softmmu (plus tests/coverage) Message-Id: <20190430165234.32272-1-alex.bennee(a)linaro.org> - wrapped up memory test changes into a [testing branch] [VIRT-280] https://projects.linaro.org/browse/VIRT-280 [testing branch] https://github.com/stsquad/qemu/tree/testing/next Upstream Work ([VIRT-109]) ========================== - posted {PATCH} linux-user: fix GPROF build failure Message-Id: <20190502092728.32727-1-alex.bennee(a)linaro.org> - posted {RFC PATCH} tests/qemu-iotests: re-format output to for make check-block Message-Id: <20190503143904.31211-1-alex.bennee(a)linaro.org> - chased a potential headers/byteswap/s390x/softfloat bug - could not reproduce [VIRT-109] https://projects.linaro.org/browse/VIRT-109 Completed Reviews [3/3] ======================= {Qemu-devel} {PATCH v2 00/29} tcg vector improvements Message-Id: <20190501050536.15580-1-richard.henderson(a)linaro.org> {PATCH v2 0/8} tests/qemu-iotests: Run basic iotests during "make check" Message-Id: <20190428155451.15653-1-thuth(a)redhat.com> {Qemu-devel} {PATCH RFC v8 00/12} Add RX archtecture support Message-Id: <20190502143409.59600-1-ysato(a)users.sourceforge.jp> Current Review Queue ==================== * {RFC v2 00/38} Plugin support Message-Id: <20181209193749.12277-1-cota(a)braap.org> * {PATCH v9 00/27} gdbstub: Refactor command packets handler Message-Id: <20190502081554.5521-1-arilou(a)gmail.com> * {Qemu-devel} {PATCH 00/26} tcg: Add CPUClass::tlb_fill Message-Id: <20190403034358.21999-1-richard.henderson(a)linaro.org> * {PATCH 0/5} tests/vm: Python 3, improve image caching, and misc Message-Id: <20190329210804.22121-1-wainersm(a)redhat.com> * {Qemu-devel} {PATCH for-4.1 v2 00/36} tcg: Move the softmmu tlb to CPUNegativeOffsetState Message-Id: <20190328230404.12909-1-richard.henderson(a)linaro.org> * {Qemu-devel} {PATCH for-4.1 00/35} tcg: Move the softmmu tlb to CPUNegativeOffsetState Message-Id: <20190323190925.21324-1-richard.henderson(a)linaro.org> -- Alex Bennée

6 years, 3 months

1
0
0 0

[ACTIVITY] report week ending 3 May

by Peter Maydell

Progress: * VIRT-65 [QEMU upstream maintainership] + pushed QEMU 4.0 out the door + code review: - RTH's patchset that cleans up the softmmu TLB structs - Nios2 nommu and semihosting patchset from codesourcery - cleanup series removing a "bucket of random stuff" header file - RTH's patchset adding BTI support for linux-user mode - RTH's patchset cleaning up the tlb_fill API - RTH's patchset implementing Cortex-A73, A75, A76 - "SBSA reference platform" new board model - patchset adding Netduino Plus 2 board model - linux-user patch to correctly handle loading ELF segments which have no file data (ie only bss) - patch adding the RTC device to the ASpeed board models - patchset fixing various minor problems preventing QEMU building cleanly for Windows-on-Arm - started looking at Damian's patchset that overhauls how we do device reset; this is good work that's long overdue, but reviewing it requires me to wrap my head around the problem space... + sent out v2 versions of a few minor patches that needed respins + wrote email to qemu-devel asking for volunteers to help with QEMU release work so it's not only me doing this every cycle * VIRT-268 [QEMU support for dual-core Cortex-M Musca board] + FPU support now upstream + a few loose ends remain to be tidied up, but this epic is now essentially complete NB: out of office Tues 7th afternoon to attend a couple of lectures at the CL by people from Amazon on their virtualization stack written in Rust (http://talks.cam.ac.uk/talk/index/119491 and http://talks.cam.ac.uk/talk/index/121069) thanks -- PMM

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending 3rd May 2019

by Peter Smith

[LLVM-158] Buildbot monitoring duty - Reported bug that libc++ when built as part as libfuzzer is not built with PIC or PIE, yet some tests for non-x86 force PIE which then fails at link-time. - Reported bugs in libstdc++ and clang where exception specifications didn't match due to extra parentheses. libstdc++ now fixed to not have any discrepancy, clang bug for not ignoring the extra parentheses still active. - Investigated libfuzzer intermittent failures, 2 look like timeouts not being long enough, submitted patch to get this increased. [LLVM-122] BTI/PAC Started prototyping an implementation based on top of the yet to land LLD patch for Intel CET. Think about how to add crypto extensions without overriding architecture in a complex build system. Review comments for LLD and compiler-rt, and mailing list proposal for something similar to __attribute__((at(address))).

6 years, 3 months

1
0
0 0

[ACTIVITY] 29 April - 3 May 2019

by Christophe Lyon

* 1 day off (public holiday) == Progress == * FDPIC - Looked at gdbserver memory consumption increased since release 7.5. Found similar results to Prathamesh. On arm-linux-gnueabihf with a sample test program, gdbserver memory usage increased from ~500kB to ~1.5MB. But that should not prevent execution on board (which has 16MB); maybe memory fragmentation? - rebased GCC FDPIC patches. There's a regression since Thomas committed fixes to fstack-protector. * GCC upstream validation: - ST internal validation broken since GCC bumped to version 10. I was using an old glibc. Upgrading glibc proved to be painful (requiring new versions of make, bison, python....). Still using RH6 servers. * GCC - ubsan on bare-metal toolchain: Sent an email to llvm-dev list, requesting help in how-to-cross-build runtime libs in clang/llvm. No response so far.... * Infra - [stalled] working on adding binutils regression testing to round-robin jobs - fixed legacy binutils regression testing by switching to new slaves - sent patches to support new slave (tcwg-lc-01) - sent ABE patches to support new gcc9 config, and update to latest-rel config == Next == FDPIC: - GCC: fix problems with fstack-protector UBSAN/bare-metal: look at how to make it easier to use on CPUs that lack sync primivites (eg cortex-m0) Infra: - Fix ST internal validation

6 years, 3 months

1
0
0 0

[ACTIVITY] 29 April - 3 May 2019

by Prathamesh Kulkarni

== This Week == * PR88837 (8/10) - WIP patch based on Richard's feedback. * Public Holiday (2/10) == Next Week == - Continue ongoing tasks

6 years, 3 months

1
0
0 0

[ACTIVITY] 29 April - 3 May 2019

by Diana Picus

== Progress == * Out of office 1 day (public holiday) * [GlobalISel] Better support for small types [LLVM-553] - Fixed the bug that I'd been looking into - Committed support for several instructions, only 3 left to commit next week * IR SVE Reviews [LLVM-545] - Looked into the patches for stack management * GlobalISel code review - Currently looking into an unpleasant patch adding a new opcode * Catching up on Connect / EuroLLVM == Plan == * More of the same * Out of office end of May - beginning of June

6 years, 3 months

1
0
0 0

[ACTIVITY] Week 17

by Yvan Roux

o 4 days week. o LLVM * Machine outliner: - Reduced CTMark issue, still working on it. o Misc * Various meetings and discussions.

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending 28 Apr 2019

by Richard Henderson

[VIRT-327 # Richard's upstream QEMU work ] Another round on launchpad 1824853, TB overflow. This time handling relocation overflow. Which would not be seen on an x86 host (2GB displacement), but would affect some of the risc hosts. Reviewed Peter's v7m fpu patches. Another round on util/path.c, fixing the startup loop that we get into for using a full chroot for -L. Poked my nose into Alex's cputlb demacrofy patch set. Hopefully the feedback was helpful... First two pull requests for 4.1. r~

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending April 26 2019

by Peter Smith

[PR40542] Sent patch for -n and -N support in LLD for upstream review [LTO] Investigated problems when using -Os -Oz with LTO, raised 2 PRs - error if clang linker invocation uses -Os and -Oz - strange error message when .bc used as a file extension for a separate compile and link step Crash in GNU ld when linking LLVM lto via the gold plugin. Looks like a memory access/corruption problem in the conversion from .bc to bfd. Other miscellaneous reviews for some linker script support in LLD. Investigation into why ld.bfd with NOLOAD on the .gnu.build-id section corrupts debug information.

6 years, 3 months

1
0
0 0

[ACTIVITY] week ending Apr. 28 2019

by Alex Bennée

QEMU Tooling ([VIRT-252]) ========================= [VIRT-252] https://projects.linaro.org/browse/VIRT-252 [VIRT-280] https://projects.linaro.org/browse/VIRT-280 QEMU plugin support ([VIRT-280]) - preparing a [new softmmu branch for posting now 4.1 is open] - rth sent me a [few changes/fixes to merge] - getting aarch64 boot.S up to I can run memory test on 64 bit system [VIRT-280] https://projects.linaro.org/browse/VIRT-280 [new softmmu branch for posting now 4.1 is open] https://github.com/stsquad/qemu/tree/ldst/demacrofy-v5 [few changes/fixes to merge] https://github.com/rth7680/qemu/commits/ajb/demacro-5 Upstream Work ([VIRT-109]) ========================== - Caught up on a bunch of reviews [VIRT-109] https://projects.linaro.org/browse/VIRT-109 Other ===== - Interviewed prospective GSoC candidates - Connect expenses paperwork Completed Reviews [5/5] ======================= [{Qemu-arm} {PATCH v3 00/10} ARM virt: ACPI memory hotplug support] mu4e:query:list:qemu-devel*%20and%20flag:unread [{Qemu-arm} {PATCH v3 00/10} ARM virt: ACPI memory hotplug support] - CLOSING NOTE [2019-04-02 Tue 07:28] looked at it [{Qemu-arm} {PATCH v3 00/10} ARM virt: ACPI memory hotplug support] mu4e:query:list:qemu-devel*%20and%20flag:unread {PATCH v7 00/27} KVM: arm64: SVE guest support Message-Id: <1553864452-15080-1-git-send-email-Dave.Martin(a)arm.com> - CLOSING NOTE [2019-04-25 Thu 12:04] Looks good to me, QEMU support still needs to be added {PATCH v2 00/14} KVM: arm64: SVE cleanups Message-Id: <1555603631-8107-1-git-send-email-Dave.Martin(a)arm.com> - CLOSING NOTE [2019-04-25 Thu 13:36] Reasonable set of clean-ups. {RISU PATCH 0/5} Fix RISU build for i386 Message-Id: <20190408182748.1238-1-jan.bobek(a)gmail.com> {Qemu-devel} {PATCH v3 01/20} gdbstub: Add infrastructure to parse cmd packets Message-Id: <20190424142714.28460-1-arilou(a)gmail.com> Absences ======== - Short week (Wed-Fri) Current Review Queue ==================== * {PATCH v7 00/21} gdbstub: Refactor command packets handler Message-Id: <20190426043558.6888-1-arilou(a)gmail.com> * {Qemu-devel} {PATCH 00/38} tcg vector improvements Message-Id: <20190420073442.7488-1-richard.henderson(a)linaro.org> * {Qemu-devel} {PATCH 0/6} ppc: misc fixes for Radix and Hash Message-Id: <20190411080004.8690-1-clg(a)kaod.org> * {Qemu-devel} {PATCH 00/26} tcg: Add CPUClass::tlb_fill Message-Id: <20190403034358.21999-1-richard.henderson(a)linaro.org> * {PATCH 0/5} tests/vm: Python 3, improve image caching, and misc Message-Id: <20190329210804.22121-1-wainersm(a)redhat.com> * {Qemu-devel} {PATCH for-4.1 v2 00/36} tcg: Move the softmmu tlb to CPUNegativeOffsetState Message-Id: <20190328230404.12909-1-richard.henderson(a)linaro.org> -- Alex Bennée

6 years, 3 months

1
0
0 0

[ACTIVITY] 22 - 26 April 2019

by Prathamesh Kulkarni

== This Week == * PR88837 (7/10) - Discussed and finalized algorithm for vector construction with Richard. * GNU-606 (1/10) - Experimented gdbserver memory consumption with docker. * Public Holiday (2/10) == Next Week == - Continue ongoing tasks.

6 years, 4 months

1
0
0 0

[ACTIVITY] 22 - 26 April 2019

by Diana Picus

== Progress == * Short week (Out of office 22 - 24 April) * [GlobalISel] Better support for small types [LLVM-553] - Investigated my bug some more, it doesn't seem to be related to my recent patches but rather an existing issue which is exposed because we select more functions now - Might be related to LLVM-456 (Fix frame index sizes for i<32) * Catching up on Connect / EuroLLVM == Plan == * Try to confirm root cause of LLVM-553 issue

6 years, 4 months

1
0
0 0

[ACTIVITY] Week 16

by Yvan Roux

o LLVM * Machine outliner: - Re-based on upstream - working on CTMark issue o Misc * BKK19 and EuroLLVM Feedback. * Various meetings and discussions.

6 years, 4 months

1
0
0 0

[ACTIVITY] week ending 21 Apr 2019

by Richard Henderson

[VIRT-327 # Richard's upstream QEMU work ] Fix TranslationBlock overflow, launchpad 1824853. Investigated launchpad 1824768, i386 emulation on arm32. But works-for-me. A bunch of work on new gvec primitives. Primarily to support David Hildebrand's target/s390 conversion, but it does enable more vectorization in target/arm as well. r~

6 years, 4 months

1
0
0 0

[ACTIVITY] 15-19 April 2019

by Christophe Lyon

== Progress == * FDPIC - Troubleshooting with stm32f469-disco. Trouble connecting via cross-gdb over openocd. Updated GNU-411 and discussing with Omair. Created GNU-606 to investigate if gdbserver memory consumption increased since release 7.5. * GCC upstream validation: - little activity this week, close to e/o stage 4 * GCC - ubsan on bare-metal toolchain: discussed with Peter, I will send an email to llvm-dev list. * Infra - several boards crashed, increasing Jenkins build queue - working on adding binutils regression testing to round-robin jobs == Next == More of the on-going tasks

6 years, 4 months

1
0
0 0

[ACTIVITY] 15 April - 19 April 2019

by Prathamesh Kulkarni

== This Week == * GCC PR88837 (7/10) - Trying different approaches for shortest initialization of vector constructor * Public Holiday (2/10) * Misc (1/10) - Meetins == Next Week == - GCC PR88837 - GNU-606

6 years, 4 months

1
0
0 0

[ACTIVITY] 15 - 19 April 2019

by Diana Picus

== Progress == * Short week (Out of office 18 - 19 April) * LLVM 7.1.0 Release for ARM & AArch64 [LLVM-546] - Uploaded binaries for both ARM & AArch64 * [GlobalISel] Better support for small types [LLVM-553] - Still in progress (currently investigating a bug) * Catching up on Connect == Plan == * Back at work on Thursday, April 25th

6 years, 4 months

1
0
0 0

[ACTIVITY] report week ending 16 Apr

by Peter Maydell

Progress: (very short week, 2 days) * VIRT-65 [QEMU upstream maintainership] + QEMU release work: flurry of last minute stuff for rc3. I hoped we would not need an rc4, but as usual a release-critical issue was found, so we will be having one. + code review * VIRT-268 [QEMU support for dual-core Cortex-M Musca board] + worked through some final bug fixes + sent out v1 of the FP support patchset for review thanks -- PMM

6 years, 4 months

1
0
0 0

[ACTIVITY] Week 15

by Yvan Roux

o Short post-connect week with EuroLLVM o LLVM * Bots babysitting.

6 years, 4 months

1
0
0 0

[ACTIVITY] report week ending 12 Apr

by Peter Maydell

(Previous week was Connect.) Progress: (short week, 3 days) * VIRT-65 [QEMU upstream maintainership] + QEMU release work: flurry of last minute stuff for rc3. I hoped we would not need an rc4, but as usual a release-critical issue was found, so we will be having one. + code review thanks -- PMM

6 years, 4 months

1
0
0 0

[ACTIVITY] 8-12 April 2019

by Christophe Lyon

== Progress == * FDPIC - Experimenting with stm32f469-disco. It seems recent gdbserver is now too large to load (issues when trying to map libstdc++.so while attempting to load a simple hello.c) * GCC upstream validation: - little activity this week, close to e/o stage 4 * GCC - ubsan on bare-metal toolchain: experimenting with multlibs * Infra - improved reporting of some jobs, improved error handling == Next == More of the on-going tasks

6 years, 4 months

1
0
0 0

[ACTIVITY] Report: end of week 15: 12th of April

by Beata Michalska

Progress: - Rather short one: Slowly getting up to speed with internal setup: accounts, accesses, communication channels, mailing lists etc. BR BM

6 years, 4 months

1
0
0 0

[ACTIVITY] 8 April 2019 - 12 April 2019

by Prathamesh Kulkarni

== This Week == * PR88837 (9/10) - Addressing patch reviews from Richard. * Misc (1/10) - Committed patch to add support for bootstrap-lto-lean config to jenkins-scripts. - Meetings == Next Week == - Continue ongoing tasks

6 years, 4 months

1
0
0 0

[ACTIVITY] 8 - 12 April 2019

by Diana Picus

== Progress == * LLVM 7.1.0 Release for ARM & AArch64 [LLVM-546] - Final candidate build in progress * [GlobalISel] Map and select G_FCONSTANT [LLVM-552] - Committed upstream * [GlobalISel] Better support for small types [LLVM-553] - In progress == Plan == * LLVM-546, LLVM-553

6 years, 4 months

1
0
0 0

[ACTIVITY] Week ending Thursday 11th April 2019

by Peter Smith

[Conferences] Linaro connect and EuroLLVM. Please see trip reports already posted. A bit of a gruelling week of Travel going from Bangkok straight to Brussels, with just a short half a day in between at home in Cambridge. [Activity] - A number of reviews whilst away - Started looking at how to build an embedded toolchain with Linaro's ABE and work out how to fit it into their infrastructure. Planned Absences Holiday 12- 16th, back on Wednesday.

6 years, 4 months

1
0
0 0

[ACTIVITY] 1-5 April 2019

by Christophe Lyon

== Progress == * FDPIC - Experimenting with stm32f469-disco * GCC upstream validation: - reported a few regressions * GCC - ubsan on bare-metal toolchain: enabling more multilibs triggered an assert in the linker. * Infra - improved reporting of some jobs == Next == FDPIC: - GCC: handle feedback on v4 patches - GDB: update patches - uclibc-ng: look at how to test fdpic mode with openadk - complete board setup Infra: - benchmarking jobs update

6 years, 4 months

1
0
0 0

[ACTIVITY] 1 - 5 April 2019

by Diana Picus

== Progress == * LLVM 7.1.0 Release for ARM & AArch64 [LLVM-546] - Uploaded RC1 for both ARM & AArch64 * [GlobalISel] Support debug info [LLVM-549] - Added support for DBG_VALUE, seems to be enough for now * [GlobalISel] Map and select G_FCONSTANT [LLVM-552] - In progress * IR SVE Reviews [LLVM-545] - More reading, discussions etc == Plan == * More of the same

6 years, 4 months

1
0
0 0

[ANNOUNCE] Arm Binary A-profile Toolchain Release GCC 8.3-2019.03

by Przemyslaw Wirkus

The Arm GNU Toolchain for the A-profile Architecture ===================================================== The Arm GNU Toolchain for the A-profile Architecture 8.3-2019.03 Release is now available. Arm is pleased to announce the Arm-built release of the pre-built GNU cross-toolchain for the A-profile cores: GCC 8.2-2019.03. This is the same toolchain that was previously built and distributed by Linaro. For the official initial announcement, see: https://community.arm.com/tools/b/blog/posts/pre-built-gnu8-cross-toolchain… For more information about the GNU Arm toolchain and to download the release packages, see the Arm Developer website at: https://developer.arm.com/tools-and-software/open-source-software/developer… For an explanation of FSF GCC 8 series changes see: https://gcc.gnu.org/gcc-8/changes.html For help in porting to GCC 8 see the following explanation: https://gcc.gnu.org/gcc-8/porting_to.html Download the release packages from: (sources) https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads (binaries) https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads Previous snapshots and release-candidates for GCC 7 and earlier are at: (sources) https://releases.linaro.org/components/toolchain/gcc-linaro/ (binaries) http://snapshots.linaro.org/components/toolchain/binaries/ Previous releases of GCC 7 and earlier are available at: http://releases.linaro.org/components/toolchain/binaries/ A description of the Arm and AArch64 target triples can be found at: https://collaborate.linaro.org/display/TCWGPUB/ARM+and+AArch64+Target+Tripl… Host Requirements ================== * Ubuntu 14.04 LTS x86_64 or later, or RHEL 6.9 x86_64: * x86_64 hosted cross compiler for AArch64 ELF bare-metal target (x86_64-aarch64-elf). * x86_64 hosted cross compiler for AArch64 ELF bare-metal, big-endian target (x86_64-aarch64_be-elf). * x86_64 hosted cross compiler for AArch64 GNU/Linux target (x86_64-aarch64-linux-gnu). * x86_64 hosted cross compiler for AArch64 GNU/Linux big-endian target (x86_64-aarch64_be-linux-gnu). * x86_64 hosted cross compiler for AArch32 bare-metal target (x86_64-arm-eabi). * x86_64 hosted cross compiler for AArch32 target with soft float (x86_64-arm-linux-gnueabi). * x86_64 hosted cross compiler for AArch32 target with hard float (x86_64-arm-linux-gnueabihf). * Windows 7 or later, for 32 and 64 bit OS: * i686-mingw32 hosted cross compiler for AArch32 bare-metal target (i686-mingw32-arm-eabi). * i686-mingw32 hosted cross compiler for AArch64 ELF bare-metal target (i686-mingw32-aarch64-elf). Package Versions ================= GCC 8.3 https://gcc.gnu.org/gcc-8/changes.html FSF glibc 2.28 http://lists.gnu.org/archive/html/info-gnu/2018-08/msg00000.html Newlib 3.1.0 https://sourceware.org/ml/newlib/2018/msg00019.html GNU Binutils 2.32 https://lists.gnu.org/archive/html/info-gnu/2019-02/msg00000.html FSF GDB 8.2.1 https://www.gnu.org/software/gdb/download/ANNOUNCEMENT libexpat 2.2.5 https://github.com/libexpat/libexpat/blob/R_2_2_5/expat/Changes Linux Kernel v4.19 https://lkml.org/lkml/2018/10/22/184 libgmp 4.3.2 libisl 0.15 libmpfr 3.1.6 libmpc 0.8.2 libiconv 1.15 Sources provided in release source tar ball. News for GCC 8 (as of GCC 8.2-2019.01) ======================================= * Fix for "gcc-arm-8 releases contain .la files.". https://bugs.linaro.org/show_bug.cgi?id=4249 * Fix for "gcc-arm-8 mingw32 releases contain symlinks". https://bugs.linaro.org/show_bug.cgi?id=4251 * Fix for "gcc-arm-8.2-2019.01 release uses gdb-8.1 instead of gdb-8.2". https://bugs.linaro.org/show_bug.cgi?id=4253 * Fix for "ARM Toolchain use a Linux kernel headers -rc release" https://bugs.linaro.org/show_bug.cgi?id=4297 * Each binary release file now contains manifest.txt file with configuration flags for each toolchain component. * Additional Linaro ABE manifest files to build x86_64 host toolchains. * Experimental multilib support for arm-eabi toolchain (multilib a+rm-profile with newlib-nano enabled). For more details about Spectre V1 mitigation in GCC visit: https://lwn.net/Articles/759423/ Contact Arm ============ For any questions, please use the Arm Communities forums at: https://community.arm.com/tools/ Please report any bugs via the Linaro Bugzilla at: https://bugs.linaro.org/

6 years, 4 months

1
0
0 0

[ACTIVITY] week ending 31 Mar 2019

by Richard Henderson

[VIRT-263 # ARMv8.1-VHE Virtual Host Extensions ] More progress, but still crashing early. Crashes on first memory access after swapping ttbr1. Debugging kernel on guest and qemu on host simultaneously. So far, all the numbers look right but still boom. [VIRT-339 # ARMv8.5-BTI, Branch Target Identification ] Posted a v4 using the PT_NOTE, but still RFC-ish due to missing abi for new mmap flag. [VIRT-327 # Richard's upstream QEMU work ] Posted v1+v2 of CPUNegativeOffsetState. Posted v1 of a cleanup of target/riscv wrt decodetree. [Other] Upgraded the laptop from fedora 27 (out of support now), to ubuntu 18.04 lts. r~

6 years, 4 months

1
0
0 0

[ACTIVITY] Week ending Friday 29th March 2019

by Peter Smith

[Activity] [LLVM-542] Compiling zephyr with clang - Prepared for presentation/discussion with colleagues at Connect next week. - Made the installation process a bit more repeatable - Added support for -Oz [Intel-CET] patches to LLD (similar to BTI) - Code-owner has redesigned the patches and they look a lot better and more likely to go in. Shouldn't be too difficult to build BTI on top of. [LLVM-523] .ARM.exidx redesign - Now committed, and has stuck for at least a day without needing to be reverted. Linaro Connect - Preparations for hack room - Gave dry run of presentation for Doughnuts. Will need to cut out some material to get through in time. Next week: At Linaro Connect Then at EuroLLVM Then most likely on holiday for remainder of that week.

6 years, 4 months

1
0
0 0

[ACTIVITY] 25-29 March 2019

by Christophe Lyon

== Progress == * FDPIC - Discovered that my stm32f429-disc1 board is not suitable for recent Linux kernels (too large). Will experiment with stm32f469-disco * GCC upstream validation: - reported a few regressions * misc (conf-calls, meetings, emails, ....) - reviewed infra script patches - fixed small issues after adding QEMU as a toolchain component in ABE - added jobs to monitor Jenkins slaves - fixed issues in benchmarking scripts == Next == FDPIC: - GCC: handle feedback on v4 patches - GDB: update patches - uclibc-ng: look at how to test fdpic mode with openadk - complete board setup Infra: - benchmarking jobs update

6 years, 4 months

1
0
0 0

[ACTIVITY] 25 - 29 March 2019

by Diana Picus

== Progress == * LLVM 7.1.0 Release for ARM & AArch64 [LLVM-546] - Fixed our infra scripts to work for 7.1.0 (looks like it's the first ever minor release since the new numbering scheme was introduced) - AArch64 is ready and green, ARM still in progress * [Thumb GlobalISel] Bugfixes [LLVM-544] - Committed the patch for alignment issues and 2 other patches for 1-bit value handling - Selfhosted clang now passes check-all * IR SVE Reviews [LLVM-545] - More reading, installed armie etc == Plan == * More of the same

6 years, 4 months

1
0
0 0

Cross compiling QEMU for aarch64

by Rohit Khanna

Hi, I am trying to cross-compile QEMU for aarch64 target using the below toolchain http://releases.linaro.org/components/toolchain/binaries/4.9-2016.02/aarch6… ../configure --target-list=aarch64-softmmu --enable-kvm --enable-vhost-net --cross-prefix=~/Downloads/gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- ERROR: pkg-config binary '/home/rokhanna/Downloads/gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-pkg-config' not found QEMU - https://github.com/qemu/qemu Any pointers on where I can find pkg-config? Thanks in advance. Thanks Rohit ----------------------------------------------------------------------------------- This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. -----------------------------------------------------------------------------------

6 years, 4 months

2
4
0 0

Re: Cross compiling QEMU for aarch64

by Rohit Khanna

Thanks Wookey and Richard. I was able to resolve the pkg-config issue after installing it with - apt install pkg-config-aarch64-linux-gnu I modified my configure command to below - ./configure --target-list=aarch64-softmmu --enable-kvm --enable-vhost-net --cross-prefix=aarch64-linux-gnu- Now I am running into dependency issue on glib-2.4 and gthread-2.0. rokhanna@rokhanna-dev ~/dev/qemu.git $ ./configure --target-list=aarch64-softmmu --enable-kvm --enable-vhost-net --cross-prefix=aarch64-linux-gnu- ERROR: glib-2.40 gthread-2.0 is required to compile QEMU Thanks Rohit ________________________________ From: Richard Henderson <richard.henderson(a)linaro.org> Sent: Thursday, March 21, 2019 9:31 PM To: Rohit Khanna; linaro-toolchain(a)lists.linaro.org Cc: Santosh Shukla Subject: Re: Cross compiling QEMU for aarch64 On 3/21/19 4:45 PM, Rohit Khanna wrote: > Hi, > > I am trying to cross-compile QEMU for aarch64 target using the below toolchain http://releases.linaro.org/components/toolchain/binaries/4.9-2016.02/aarch6… > > > ../configure --target-list=aarch64-softmmu --enable-kvm --enable-vhost-net --cross-prefix=~/Downloads/gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- > > ERROR: pkg-config binary '/home/rokhanna/Downloads/gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-pkg-config' not found First, "--cross-prefix=aarch64-linux-gnu-". It is a prefix, not a path. You should have "$HOME/Downloads/gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu/bin" in your path in order to use that compiler. Second, pkg-config is not part of a toolchain, but part of an entire OS distribution. If your host is debian or ubuntu, they ship a version configured for aarch64 cross-compilation. Which is helpful because... Third, you're going to need a *lot* of aarch64 libraries in order to build QEMU. This is where OS support for cross-toolchains is key. r~ ----------------------------------------------------------------------------------- This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. -----------------------------------------------------------------------------------

6 years, 4 months

1
0
0 0

[ACTIVITY] report week ending 28 Mar

by Peter Maydell

Progress: (short week, 3 days) * VIRT-65 [QEMU upstream maintainership] + reviewed a few patchsets that had been lurking in my queue too long + trawled through the QEMU bug system for bugs we'd already fixed and forgotten to close, bugs which need more info from the submitter, and bugs which were very easy to fix + various other release related work * Preparation for Connect next week thanks -- PMM

6 years, 4 months

1
0
0 0

[ACTIVITY] Week ending 23rd March 2019

by Peter Smith

Linaro connect preparation: - Finished Linaro Connect presentation on cross compilation with clang -- Hoping to do a dry-run at Doughnuts this week assuming we can resolve a potential clash with the IPG hands-on. - Draft agenda for the hack-room produced. [LLVM-523] ARM.exidx redesign - Got approval, committed and then reverted my exceptions redesign due some build-bot failures. Found another potential problem with --emit-relocs that may be a bit more difficult to fix. [BTI] Continuing to review and make suggestions for Intel CET patch (pre-requisite for BTI due to common use of .note.gnu.property sections) Some more communication with Linux Kernel port to Arm with respect to assembler problems.

6 years, 5 months

1
0
0 0

[ACTIVITY] Week 12

by Yvan Roux

o LLVM * Machine outliner: - Debugging issue in LLVM bootstrap. - Preparing BKK19 Hacking session presentation. o Misc * Various meetings and discussions.

6 years, 5 months

1
0
0 0

[ACTIVITY] 18 March - 22 March 2019

by Prathamesh Kulkarni

== This Week == * PR88837 (2/10) - Started investigating the bug * Validation (2/10) - tcwg_gnu: Merged into master and added profiledbootstrap. - ABE cleanup patch to remove --enable bootstrap option * TCWG-1508 (1/10) - Investigated merge failure, Uros's suggested patch fixes the issue. * Public Holidays (4/10) * Misc (1/10) - Meetings == Next Week == - Continue ongoing tasks

6 years, 5 months

1
0
0 0

[ACTIVITY] week ending 24 Mar 2019

by Richard Henderson

[VIRT-263 # ARMv8.1-VHE Virtual Host Extensions ] Picked up my partial patch set and started on it again. It is improved by having done the pauth/bti/mte work. But still a work in progress. [VIRT-327 # Richard's upstream QEMU work ] Version 3 of tcg/ppc vector instructions. Reviewed target/rx v4. Fixed thread=single expansion of casp after Alex did all the hard work tracking down the kernel failure, and writing me a test case. Looking into the size of the softmmu tlb expansion. Current thinking is to move tlb out of CPUArchState into a new struct that precedes env, so that the tlb is at small negative offsets from env, so that {mask, table} is loadable with LDP/LDRD. r~

6 years, 5 months

1
0
0 0

[ACTIVITY] week ending Mar. 24 2019

by Alex Bennée

Upstream Work ([VIRT-109]) ========================== - posted some CI clean-ups for next 4.0-rc - posted {PATCH v1 0/3 for 4.0} reduce timeouts on Travis Message-Id: <20190319124800.7454-1-alex.bennee(a)linaro.org> - posted {PATCH} .travis.yml: reduce number of targets built while disabling things Message-Id: <20190321124857.28132-1-alex.bennee(a)linaro.org> - will send PR on Monday - while testing {Qemu-devel} {PATCH 3/4} memory: introduce memory_global_after_dirty_log_sync Message-Id: <20180209104546.29401-4-pbonzini(a)redhat.com> - discovered regression -cpu max -accel tcg,thread=single with ARM64_LSE_ATOMICS kernel breaks - this is likely due to different code paths for non-MTTCG atomics - however attempts [to reproduce in linux-user] have so far drawn a blank - have notified rth who can hopefully find the problem [VIRT-109] https://projects.linaro.org/browse/VIRT-109 [to reproduce in linux-user] https://github.com/stsquad/qemu/tree/for-4.0/mttcg-and-lse-atomics Other ===== - more work on Connect presentation Absences ======== - Connect BKK19 (1-5th April 2019) - holiday after Connect Current Review Queue ==================== * {Qemu-devel} {multiprocess RFC PATCH 00/37} Initial support of multi-process qemu Message-Id: <20190307072025.8041-1-elena.ufimtseva(a)oracle.com> * {Qemu-devel} {PATCH 0/6} Refine exec Message-Id: <20190321082555.21118-1-richardw.yang(a)linux.intel.com> * {PATCH v5 00/26} KVM: arm64: SVE guest support Message-Id: <1553017938-710-1-git-send-email-Dave.Martin(a)arm.com> * {PATCH v4 00/19} Acceptance Tests: target architecture support Message-Id: <20190312121150.8638-1-crosa(a)redhat.com> * {PATCH 0/5} travis-ci: Build EDK2 roms Message-Id: <20190311003052.13778-1-philmd(a)redhat.com> * {RFC v2 00/38} Plugin support Message-Id: <20181209193749.12277-1-cota(a)braap.org> -- Alex Bennée

6 years, 5 months

1
0
0 0

[ACTIVITY] report week ending 22 Mar

by Peter Maydell

Progress: * VIRT-65 [QEMU upstream maintainership] + tagged rc0 for QEMU 4.0.0; various other release-ish work * VIRT-268 [QEMU support for dual-core Cortex-M Musca board] + more progress with FP support: lazy state saving and the vlldm/vlstm insns now implemented. FP support is now feature-complete, though some bugs likely remain to be fixed. * A day or so taken up by move to a new desktop machine (but builds should go faster now!) NB: I'm not working on Wednesday or Friday next week. thanks -- PMM

6 years, 5 months

1
0
0 0

[ACtiVITY] 18 - 22 March 2019

by Diana Picus

== Progress == * LLVM 8.0.0 Release for ARM & AArch64 [LLVM-526] - LLVM 8.0.0 is out! * [Thumb GlobalISel] Bugfixes [LLVM-544] - Patch for alignment issues ready to commit next week - With the patch, we can build clang successfully, but it fails some of its tests - Investigated one of the tests, it's failing because we end up representing 'true' as '-1'. Going to prepare a patch for that next week * IR SVE Reviews [LLVM-545] - Reviewed D32530 - Scalable Vector IR Type * Buildbot babysitting - Reported some failures upstream - Complained about non-deterministic libfuzzer tests == Plan == * LLVM-544, LLVM-545

6 years, 5 months

1
0
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

linaro-toolchain