kernel-packages team mailing list archive

[Abhishek Gupta <abgupta@xxxxxxxxxxxxx>]

There are two purposes:

a) It will help in Azure billing because now we can know what distribution of Linux we are running.
b) It helps us identify prominent distributions which in turn allows us to ensure that drivers are readily available in such distributions.

Please let me know if you need more information.
Thanks,
Abhishek

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https://bugs.launchpad.net/bugs/1193172

Title:
  Populating Hyper-V MSR for Ubuntu 13.10

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Saucy:
  Fix Committed

Bug description:
  For new distribution releases the Hyper-V team is trying to better
  populate the Hyper-V guest ID. Our specific goal is to identify any
  given distribution and its release version. With this intent we worked
  with SUSE to include a patch in their upcoming SLES 11 SP3 release.
  The patch is available in the following issue:

  https://bugzilla.novell.com/show_bug.cgi?id=814005

  In case you cannot access the bug then the entire patch is as follows:

  --- linux-3.9-rc5-master.orig/drivers/hv/hv.c
  +++ linux-3.9-rc5-master/drivers/hv/hv.c
  @@ -134,6 +134,8 @@ int hv_init(void)
          int max_leaf;
          union hv_x64_msr_hypercall_contents hypercall_msr;
          void *virtaddr = NULL;
  +       __u8 d1 = 0x10; /* SuSE */
  +       __u16 d2 = 0x0; /* -d of a.b.c-d */

          memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);
          memset(hv_context.synic_message_page, 0,
  @@ -148,7 +150,7 @@ int hv_init(void)
          /*
           * Write our OS ID.
           */
  -       hv_context.guestid = generate_guest_id(0, LINUX_VERSION_CODE, 0);
  +       hv_context.guestid = generate_guest_id(d1, LINUX_VERSION_CODE, d2);
          wrmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid);

          /* See if the hypercall page is already set */

  We request you to include the same patch for Ubuntu 13.10 with the
  below modifications:

  1. In place of __u8 d1 = 0x10; /* SuSE */ we would request you to add the following line:
  __u8 d1 = 0x80; /* Canonical */

  2. In place of __u16 d2 = 0x0; /* -d of a.b.c-d */ we would request you to add the correct ‘-d’ of the Linux kernel version for Ubuntu 13.10
  __u16 d2 = 0x0; /* -d of a.b.c-d */

  For Ubuntu 13.10, I noticed that uname –r returns “3.9.0-6-generic”.
  We would like to populate d2 with 6. It would be best if you guys
  could automate the process of populating that string.

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