This bug is awaiting verification that the linux-azure/5.15.0-1021.26
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-jammy' to 'verification-done-jammy'. If the
problem still exists, change the tag 'verification-needed-jammy' to
'verification-failed-jammy'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!

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https://bugs.launchpad.net/bugs/1990184

Title:
  Azure: Enable vPCI multi-MSI interrupts

Status in linux-azure package in Ubuntu:
  Fix Released
Status in linux-azure source package in Jammy:
  Fix Committed

Bug description:
  SRU Justification

  [Impact]

  This is a 2nd attempt with this patch set. The first attempt [1]
  caused a regression.

  The Hyper-V vPCI driver (pci-hyperv) doesn't work with a PCIe devcie
  that supports multiple MSI interrupts (Note: MSI-X has been working
  fine). Recently Jeffrey Hugo <quic_jh...@quicinc.com> made 4 patches
  to the vPCI driver so multiple-MSI can work now. Please consider
  picking up the 4 patches into the linux-azure kernels for Ubuntu LTS
  18.04, 20.04 and 22.04:

  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=08e61e861a0e47e5e1a3fb78406afd6b0cea6b6d

  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=455880dfe292a2bdd3b4ad6a107299fce610e64b

  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4b77778ecc5bfbd4e77de1b2fd5c1dd3c655f1f

  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a2bad844a67b1c7740bda63e87453baf63c3a7f7

  [1] https://bugs.launchpad.net/bugs/1981577

  [Test Plan]

  Microsoft tested: " I tested the kernel and it worked as expected,
  i.e. we still have the multi-MSI capability and I no longer see the
  soft lockup issue with fio + NVMe + the L64s_v2 VM size."

  [Where things could go wrong]

  vPCI devices may no get interrupts

  [Other Info]

  SF: #00339521

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