This bug is awaiting verification that the linux-
aws-6.5/6.5.0-1013.13~22.04.1 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-linux-
aws-6.5' to 'verification-done-jammy-linux-aws-6.5'. If the problem
still exists, change the tag 'verification-needed-jammy-linux-aws-6.5'
to 'verification-failed-jammy-linux-aws-6.5'.


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!


** Tags added: kernel-spammed-jammy-linux-aws-6.5-v2 
verification-needed-jammy-linux-aws-6.5

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https://bugs.launchpad.net/bugs/2036600

Title:
  Azure: Fix Azure vendor ID

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Focal:
  Invalid
Status in linux source package in Jammy:
  Invalid
Status in linux source package in Lunar:
  Won't Fix
Status in linux source package in Mantic:
  Fix Released

Bug description:
  SRU Justification

  [Impact]

  The linux-azure 6.2 kernel doesn't report a correct GUEST_ID

  There is a mistake in the commit
  (https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-
  azure/+git/jammy/commit/?id=5dd24f2df3280d4354641f4687dbb36e418e7de8)
  :

  Before the commit, the good guest_id is 0x8180000602100000.

  With the commit, the generated guest_id is incorrect:
  0x0080000602100000, i.e. the 0x81 from bit 56~63 are dropped.

  See "include/asm-generic/hyperv-tlfs.h" for the definition of the bits:
  * Bit(s)
  * 63 - Indicates if the OS is Open Source or not; 1 is Open Source

  * 62:56 - Os Type; Linux is 0x100 !!!!! Dexuan: this should be 0x1.
  I'll post a patch to LKML to fix this typo.

  * 55:48 - Distro specific identification
  * 47:16 - Linux kernel version number
  * 15:0 - Distro specific identification

  See https://learn.microsoft.com/en-us/virtualization/hyper-v-on-
  windows/tlfs/tlfs ("February, 2020: Released Version 6.0b", page 15)

  As a result, the host thinks that the VM is not an open-source OS, and
  it's not Linux. Consequently, the "VM Availability" fron Azure portal
  is 0 (unhealthy): some users rely on the info to manage their VMs,
  e.g. if the VM is erroneously reported "unhealthy", the VM may be
  killed and re-created, and the new VM is still "unhealthy", and the VM
  may be killed and re-created again...

  Please consider integrating the below fix ASAP. This affects regular
  VMs, and I think this affects CVMs as well.

  The fix should be:

  diff --git a/include/asm-generic/hyperv-tlfs.h 
b/include/asm-generic/hyperv-tlfs.h
  @@ -135,7 +135,7 @@ union hv_reference_tsc_msr {
  *
  */

  -#define HV_LINUX_VENDOR_ID 0x80 /* Canonical */
  +#define HV_LINUX_VENDOR_ID 0x8180 /* Canonical */

  [Test Plan]

  Microsoft tested

  [Regression Potential]

  VMs could be misclassified.

  [Other Info]

  SF: #00368936

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