linaro-toolchain

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5626 discussions

by Peter Maydell

Progress: * VIRT-65 [QEMU upstream maintainership] - We needed an rc4 (which I wasn't very surprised about), so more release wrangling again. - Noticed some bugs in how we set ID registers for the AArch64 'max' CPU; sent patches (one of which seemed worth getting into rc4) - There's been a long-standing problem where a linux-user QEMU running on a 64-bit host and emulating a 32-bit guest can't deal with the 64-bit hash 'offsets' from ext4 getdents, which causes guests using newer glibc to fail. Linus Walleij wrote a kernel patch which allows QEMU to request that the kernel gives it hash values that will fit into 32 bits. I wrote an RFC QEMU patch that would use this and tested that this does indeed solve the problem. Discussion is continuing on the kernel size about what the correct API for this is, but the principle that the kernel should change seems to be accepted. - A bug was raised that BKPT for arm linux-user wasn't causing SIGTRAP; sent patches fixing that and some other issues I noticed in that bit of the code while I was fixing it. - code review: + a patch adding proper FIFO emulation to the PL011 UART model + rth's patchset improving codegen of neon integer-compare-vs-0 insns + xilinx patchset to disable unsupported FDT firmware nodes + patchset adding kaslr-seed properties to the virt board dtb (mostly useful for OP-TEE) * VIRT-364 [QEMU support for ARMv8.1-M extensions] - Progress with neon decodetree conversion. I've now completed all the 3-reg-same insn grouping, which is a large enough amount that I'm planning to send out a patchset with what I have so far. Need to refactor/tidy up some bits of the code first, now I can see what the completed conversion looks like. thanks -- PMM

5 years, 4 months

[ACTIVITY] 20-24 April 2020

by Christophe Lyon

== Progress == * GCC upstream validation: - reported a couple of failures/regressions * GCC: - Committed a few fixes to MVE/CDE tests to avoid failures on arm-linux-gnueabi toolchains - Sent a few more testcases fixes - PR94538 (pure-code/M23): Let Wilco handle it since he has more testcases - Looked at Linaro bug #5614, and forwarded it for upstream discussion as PR94743 (IRQ handler and Neon registers) * FDPIC/GDB: - rebased gdbserver patches, it still crashes at runtime. Code size bigger than my last attempt with gdb-8.x. - tried to link it statically, but that fails because of multiple defs in uclibc. * misc: - infra fixes / troubleshooting / reviews - lots of disruptions == Next == * FDPIC GDB * GCC/cortex-M

5 years, 4 months

Re: buildbot failure in LLVM on clang-cmake-armv8-lld

by David Blaikie

Looks like there might be something wrong with this buildbot? (none of the commits seem to have changed lnt - or maybe lnt isn't monitored/blamed in the buildbot config?) On Tue, Apr 21, 2020 at 12:16 AM <llvm.buildmaster(a)lab.llvm.org> wrote: > The Buildbot has detected a new failure on builder clang-cmake-armv8-lld > while building llvm. > Full details are available at: > http://lab.llvm.org:8011/builders/clang-cmake-armv8-lld/builds/3875 > > Buildbot URL: http://lab.llvm.org:8011/ > > Buildslave for this Build: linaro-armv8-01-arm-lld > > Build Reason: scheduler > Build Source Stamp: [branch master] > c2d86e1f3044abb295796c8267c7b9057f54a067 > Blamelist: Alexander Shaposhnikov <alexshap(a)fb.com>,Chris Bieneman < > chris.bieneman(a)me.com>,Dan Liew <dan(a)su-root.co.uk>,David Blaikie < > dblaikie(a)gmail.com>,Johannes Doerfert <johannes(a)jdoerfert.de>,Mircea > Trofin <mtrofin(a)google.com>,Pavel Iliin <Pavel.Iliin(a)arm.com>,Sam Kerner < > skerner(a)chromium.org>,Shengchen Kan <shengchen.kan(a)intel.com>,Sriraman > Tallam <tmsriram(a)google.com> > > BUILD FAILED: failed setup lit > > sincerely, > -The Buildbot > > > >

5 years, 4 months

[ACTIVITY] 2 weeks ending 19 Apr 2020

by Richard Henderson

Short weeks around Easter. [VIRT-349 # QEMU SVE2 Support ] Lots of progress on insn implementation. Several patches from Stephen Long merged. He's coming up to speed nicely. Some good review from Laurent Desnogues. Spent some time writing a version of strspn for Arm optimized-routines, as a way of testing the NMATCH instruction. Found bugs in the tcg optimizer instead. Still in the process of rebasing the branch upon those fixes, and upon patch review from Peter. [VIRT-327 # Richard's upstream QEMU work ] Couple of patches for 5.0. [GCC] Posted v4 of aarch64 cmpti patch set. r~

5 years, 4 months

[ACTIVITY] week ending Apr. 19 2020

by Alex Bennée

VirtIO Related Work ([VIRT-366]) ================================ [VIRT-366] <https://projects.linaro.org/browse/VIRT-366> VirtIO RPMB ([VIRT-371]) - started work on [vhost-user backend for rpmb] - have the basic vhost-user loop created, still need to plumb into QEMU - will be able to experiment with [VIRT-402] minimal profile once running [VIRT-371] <https://projects.linaro.org/browse/VIRT-371> [vhost-user backend for rpmb] <https://github.com/stsquad/qemu/tree/vhost-user-rpmb> [VIRT-402] <https://projects.linaro.org/browse/VIRT-402> VirtiIO blogpost ([LBO-2]) - wrote up history of VirtIO up to standardisation - still TODO new work and architectures [LBO-2] <https://projects.linaro.org/browse/LBO-2> slides with virtio architectures for Victor Upstream Work ([VIRT-109]) ========================== - posted [PULL for 5.0-rc3 0/8] a few small fixes (docker, user, pie and gdbstub) Message-Id: <20200415104211.9388-1-alex.bennee(a)linaro.org> [VIRT-109] <https://projects.linaro.org/browse/VIRT-109> Other ===== - preparation work and GSoC candidate interviews [my QEMU developer guide] <https://people.linaro.org/~alex.bennee/org/presentations/qemu-developer-gui…> 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 v6 00/36] Initial support for multi-process qemu Message-Id: <cover.1586165555.git.elena.ufimtseva(a)oracle.com> Added: <2020-04-06 Mon> * [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> -- Alex Bennée

5 years, 4 months

[ACTIVITY] report week ending 17 Apr

by Peter Maydell

(short week, 3 days) Progress: * VIRT-65 [QEMU upstream maintainership] - getting rc3 out of the door, including sorting out some last minute bug fixes. As usual, we hope not to need an rc4 but I expect we will. - code review; a two-day blitz has got my to-review queue down to a slightly more manageable size... + rth's series refactoring SVE load/store implementation + Guenter's i.MX watchdog support series + brief pass over raspi USB host controller emulation series + patch adding /secure-chosen/kaslr-seed to the virt dtb + the Greensocs/Xilinx clock framework patchset [including doing an editing pass on the docs] thanks -- PMM

5 years, 4 months

How to use 'runtime-linaro-...' and 'sysroot-linaro-...' archives ?

by Константин Аладышев

Hello! I know, this is probably a very stupid question, but I couldn't find an answer for it. On the page https://releases.linaro.org/components/toolchain/binaries/latest-5/arm-linu… there are 3 major download components: gcc/sysroot/runtime. I download 'gcc', add 'gcc-linaro-.../bin' to my PATH and cross compile my apps. On my target system, I need 'libc', and it is present in the 'sysroot-linaro-...'. Do I need to copy all of the contents of 'sysroot-linaro-...' folder to my target? 'linaro-sysroot' folder is kinda big. 'libc.so' library is 13MB. If there is a way to decrease its size, if I want to use Linaro compiled programs on an embedded target? And what is a purpose of 'runtime-linaro-..." component?

5 years, 4 months

How to use 'runtime-linaro-...' and 'sysroot-linaro-...' archives ?

by Konstantin Aladyshev

5 years, 4 months

[ACTIVITY] 6 - 10 April 2020

by Prathamesh Kulkarni

== This Week == * LLVM-611 (tune heuristic to lower blx): Working on feedback. * GNU-659: Doing benchmarking experiments * Public holiday - One day off == Next Week == - Continue with LLVM-611 and GNU-659

5 years, 4 months

[ACTIVITY] 6-10 April 2020

by Christophe Lyon

== 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. Updated cmse-15.c test. Analyzing / bisecting other failures. - Sent fixes to MVE tests to avoid failures on arm-linux-gnueabi toolchains - Updated a few bugzilla entries about cortex-m issues * misc: - infra fixes / troubleshooting / reviews == Next == * FDPIC GDB * GCC/cortex-M

5 years, 4 months

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