This bug was fixed in the package qemu - 1:8.2.2+ds-0ubuntu1.6
---
qemu (1:8.2.2+ds-0ubuntu1.6) noble; urgency=medium
[ Gabriel B. Sant'Anna ]
* Fix emulation of RISC-V Vector instructions (LP: #2095169)
- d/p/u/lp2095169-riscv-vector-fixes-{01..12}.patch: ensure vstart_eq_zer
@raof Do you think anything else is needed before this can be pushed to
noble-updates?
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Title:
[SRU] SIGILL on emulation of RISC-V Vector instruc
On the livecd-rootfs autopkgtest: the new test run passed, so no regressions
were caused by this update.
In the meantime, I've also verified that the fix unblocks an issue we had on a
RISC-V partner project.
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Hi Christian, thanks for pointing out the omission of cpu flags in the
testing procedures, that was my bad.
Re: regressions listed by the SRU bot - it seems we tripped on an
infrastructure issue while running autopkgtests, but I've requested a
re-run just to make sure.
I can also confirm that the
I've set up a noble container and in there was driving riscv64 emulation
as instructed following https://wiki.ubuntu.com/RISC-V/QEMU
Then in that guest I did updates and installed the test workload:
$ sudo apt update
$ sudo apt upgrade
$ sudo apt install build-essential unzip
$ wget
https://bugs
The last patch in the series (lp2095169-riscv-vector-fixes-12.patch)
appears to me to be unnecessary - it's a pure micro-optimisation that
the optimiser may already be doing - but it's also sufficiently trivial
that I don't think it's worth blocking on a new upload.
** Changed in: qemu (Ubuntu Nob
Hello Gabriel, Heinrich,
I've just uploaded the package to Noble:
$ dput qemu_8.2.2+ds-0ubuntu1.6_source.changes
Trying to upload package to ubuntu
Checking signature on .changes
gpg: /home/sergio/work/qemu/qemu_8.2.2+ds-0ubuntu1.6_source.changes: Valid
signature from 106DA1C8C3CBBF14
Checking s
** Changed in: qemu (Ubuntu Oracular)
Status: Confirmed => Invalid
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Title:
[SRU] SIGILL on emulation of RISC-V Vector instructions
To man
On Plucky my error was in the machine definition file. With cpu=max my
example works.
** Changed in: qemu (Ubuntu Plucky)
Status: Confirmed => Invalid
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: qemu (Ubuntu Oracular)
Status: New => Confirmed
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Title
** Changed in: qemu (Ubuntu Noble)
Assignee: Gabriel B. Sant'Anna (baioc) => (unassigned)
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Title:
[SRU] SIGILL on emulation of RISC-V Vector
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: qemu (Ubuntu Noble)
Status: New => Confirmed
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Title:
Hello Sergio,
You originally set this to released for Noble.
I cannot see the proposed patches in pkg/import/1%8.2.2+ds-0ubuntu1.5
The same error occurs Plucky for instruction
vsetivlizero,4,e32,m1,ta,ma
in a virtual machine based on QEMU 1:9.0.2+ds-4ubuntu9.
I now have added Oracular
** Also affects: qemu (Ubuntu Plucky)
Importance: Undecided
Status: Fix Released
** Also affects: qemu (Ubuntu Oracular)
Importance: Undecided
Status: New
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https://bug
** Changed in: qemu (Ubuntu)
Status: New => Fix Released
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Title:
[SRU] SIGILL on emulation of RISC-V Vector instructions
To manage notifi
** Description changed:
[ Impact ]
* Qemu 8.2.2 claims to support the riscv64 vector extension, but fails to
set the emulated vstart_eq_zero flag, which then causes illegal instruction
crashes in certain cases.
* Launchpad builders currently use the same Qemu package as Noble, so this
** Description changed:
[ Impact ]
- * Qemu 8.2.2 reports support for the riscv64 vector instruction, but fails
to set the emulated vstart_eq_zero flag, which then causes illegal instruction
crashes in certain cases.
- * Launchpad builders use the same Qemu package as noble, so fixing thi
** Changed in: qemu (Ubuntu Noble)
Assignee: (unassigned) => Gabriel B. Sant'Anna (baioc)
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Title:
[SRU] SIGILL on emulation of RISC-V Vector
** Also affects: qemu (Ubuntu Noble)
Importance: Undecided
Status: New
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Title:
[SRU] SIGILL on emulation of RISC-V Vector instructions
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