[Bug 2098421] Re: [SRU] U-Boot 2024.01 fails to boot on RISC-V with QEMU 9.0 and cpu=max

[Timo Aaltonen]

Hello Heinrich, or anyone else affected,

Accepted u-boot into noble-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/u-boot/2024.01+dfsg-1ubuntu5.2 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
noble to verification-done-noble. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-noble. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: u-boot (Ubuntu Noble)
       Status: Confirmed => Fix Committed

** Tags added: verification-needed-noble

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Title:
  [SRU] U-Boot 2024.01 fails to boot on RISC-V with QEMU 9.0 and cpu=max

Status in u-boot package in Ubuntu:
  Fix Released
Status in u-boot source package in Noble:
  Fix Committed
Status in u-boot source package in Oracular:
  Fix Committed
Status in u-boot source package in Plucky:
  Fix Released

Bug description:
  [ Impact ]

  RISC-V device-trees have moved to using riscv,isa-extensions instead
  of riscv,isa. If riscv,isa is missing, U-Boot 2024.01 fails to boot.
  This can be demonstrated with QEMU 9.0 and cpu=max.

  The following patches provide a remedy:

  0d95add3b1c7 ("riscv: cpu: improve multi-letter extension detection in supports_extension()"
  b90edde70127 ("riscv: don't read riscv, isa in the riscv cpu's get_desc()")
  f39b1b77d822 ("riscv: support extension probing using riscv, isa-extensions")

  [Test Plan ]

  With QEMU 9.0 installed run:

  qemu-system-riscv64 -M virt -cpu max \
  -kernel /usr/lib/u-boot/qemu-riscv64_smode/uboot.elf

  For regression testing:

  Install u-boot-sifive on the Unmatched board and boot.
  Install u-boot-microchip on the Icicle board and boot.
  Install u-boot-starfive on the VisionFive 2 board and boot.

  [ Where problems could occur ]

  Booting on QEMU or real hardware might fail if the implementation of
  ISA string parsing were incorrect.

  [ Other Info ]

  n/a

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