[VIRT-263 # ARMv8.1-VHE Virtual Host Extensions ]
Merged some fixes from Alex.
Starting to test kvm-inside-tcg.
[VIRT-327 # Richard's upstream QEMU work ]
Posted v1 of aa32 base isa conversion to decodetree.
Reviewed v5 of the sparc64 invert endian tlb bit patches.
r~
[ACTIVITY] On buildbot and Linux kernel CI duty
- One obscure alias analysis bug that only failed on GCC on AArch64
that suddenly started failing a unit test. Tracked down to an
unitialised variable when API called directly via unit-test. Test has
been reverted, but I've put enough information in a PR for an AA
expert to either fix the test or initialise class member pointer to
nullptr.
- A long review of an LLD patch that changes page-alignment rules and
this has impact on the TLS address. Spent way too long trying to
reverse engineer why the formula used would work, needed to find the
corresponding loader code to find the other side.
- Assertion added to LLVM triggered a failure in Linux kernel build,
reproduced example and forwarded on
- Code size investigation Linaro Connect proposal accepted, now have
to write it.
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ QEMU 4.1 rc2 tagged
+ investigated and sent patches for a problem reported by Mark Rutland
where we still were sometimes putting the initrd on top of the kernel
in our built-in bootloader code
+ spent a couple of days tracking down the cause of LP:1696773, an
intermittent bug when running AArch64 Go programs under QEMU linux-user
mode. This turned out to be an incorrect implementation of 'sigaltstack'
as setting a process-wide signal stack rather than a per-thread one.
+ prompted by a patch from Greensocs fixing a vmstate migration bug
in the pl330 model, improved the vmstate macros to catch that category
of bug; this detected one other bug lurking in a different device.
thanks
-- PMM
== Progress ==
* LLVM 8.0.1 final binaries uploaded
* Use ninja in release job [LLVM-536]
- Patches ready, but waiting for 9.0.0-rc1 so I can test (was
supposed to come out this week but got postponed to Monday)
* Investigate running benchmarks in containers [TCWG-1513]
- Still having trouble, but working on it
* IR SVE reviews [LLVM-545]
- Posted some feedback to D53137
* A bit of fuzzing of GlobalISel CallLowering for AArch32
== Plan ==
* Upcoming vacation: 6 - 13 August
[LLVM-478] Clang and GCC code size comparison
- Looked at CMSIS-DSP, clang consistently produces smaller code than
GCC in contrast to Zephyr. Recorded some specific areas
- Tidied up scripts and build system patches to post for review
- Wrote up a readme for how to reproduce the results
[Misc]
- LLD reviews for reducing image-size using some VA/PA address alignment tricks.
- MC and LLD changes to add MOV[WNZ] relocations.
- Looked into why our container might be giving Resource unavailable
during ninja check-all
Some thoughts on ABI process.
Progress:
* VIRT-65 [QEMU upstream maintainership]
+ QEMU 4.1 rc1 tagged
+ investigating various bugs:
- LP:1836501 (assert using vexpress-a15 board with KVM) : couldn't
reproduce; this reminded me I needed to do a debian upgrade on my
cubietruck devboard, though.
- LP:1830864 (assert using -cpu host,aarch64=off with KVM on a host
kernel older than 4.15): diagnosed problem and sent a patch to fix it
- sent a patch to fix a URL in our configure script which pointed
users at the binary downloads page of the project website when it
wanted the source downloads page
- sent a patch fixing a problem building elf2dmp when libcurl's header
files are in a non-standard location
thanks
-- PMM
