[Bug 1995860] Re: Emulation of fence.tso hangs in endless loop

[Launchpad Bug Tracker]

This bug was fixed in the package opensbi - 1.1-0ubuntu0.22.04.1

---------------
opensbi (1.1-0ubuntu0.22.04.1) jammy; urgency=medium

  * New upstream release (LP: #1995261)
  * Fix emulation of fence.tso hanging in endless loop on Allwinner D1
    d/p/lib-sbi_illegal_insn-Fix-FENCE.TSO-emulation-infinit.patch
    (LP: #1995860)
  * Dropping all other patches as they already integrated in the new source.

 -- Heinrich Schuchardt <heinrich.schuchardt at canonical.com>  Tue, 15 Nov
2022 17:10:37 +0100

** Changed in: opensbi (Ubuntu Jammy)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1995860

Title:
  Emulation of fence.tso hangs in endless loop

Status in opensbi package in Ubuntu:
  Fix Released
Status in u-boot package in Ubuntu:
  Fix Released
Status in u-boot-nezha package in Ubuntu:
  Fix Released
Status in opensbi source package in Jammy:
  Fix Released
Status in opensbi source package in Kinetic:
  Fix Released
Status in u-boot source package in Kinetic:
  Fix Committed
Status in u-boot-nezha source package in Kinetic:
  Fix Released
Status in opensbi source package in Lunar:
  Fix Released
Status in u-boot source package in Lunar:
  Fix Released
Status in u-boot-nezha source package in Lunar:
  Fix Released
Status in opensbi package in Debian:
  Fix Released

Bug description:
  [ Impact ]

  OpenSBI 1.1 has added an emulation of the fence.tso instruction
  missing on the Allwinner D1 SOC. This emulation hangs in an endless
  loop. This is fixed by the following upstream patch:

  111afc12306e ("lib: sbi_illegal_insn: Fix FENCE.TSO emulation infinite
  trap loop")

  We need to rebuild packages u-boot and u-boot-nezha with the updated
  OpenSBI to make use of the fix.

  [ Test Plan ]

  * Boot QEMU, SiFive Unmatched and Nezha D1 with the updated U-Boot.
  * Install package clang.
  * Execute command clang -v (which uses the fence.tso command).
  * Reboot.

  [ Where problems could occur ]

  The patch added concerns only the fence.tso emulation.

  If the patch were wrong, the Nezha D1 might still fail in the
  emulation.

  A defective OpenSBI might lead to failure to boot, to reboot, to
  poweroff or to crashes when Linux calls into SBI.

  [ Other Info ]

  n/a

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