On Tue, Jun 16, 2015 at 04:22:12PM -0400, Joseph Salisbury wrote:
> From: Nick Meier <nme...@microsoft.com>
> 
> BugLink: http://bugs.launchpad.net/bugs/1463584
> 
> Hyper-V allows a guest to notify the Hyper-V host that a panic
> condition occured.  This notification can include up to five 64
> bit values.  These 64 bit values are written into crash MSRs.
> Once the data has been written into the crash MSRs, the host is
> then notified by writing into a Crash Control MSR.  On the Hyper-V
> host, the panic notification data is captured in the Windows Event
> log as a 18590 event.
> 
> Crash MSRs are defined in appendix H of the Hypervisor Top Level
> Functional Specification.  At the time of this patch, v4.0 is the
> current functional spec.  The URL for the v4.0 document is:
> 
> http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor
>  Top Level Functional Specification v4.0.docx
> 
> Signed-off-by: Nick Meier <nme...@microsoft.com>
> Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
> (Backported from commit 96c1d0581d00f7abe033350edb021a9d947d8d81)
> Signed-off-by: Joseph Salisbury <joseph.salisb...@canonical.com>
> ---
>  drivers/hv/hyperv_vmbus.h | 11 +++++++++++
>  drivers/hv/vmbus_drv.c    | 35 +++++++++++++++++++++++++++++++++++
>  2 files changed, 46 insertions(+)

This is a new feature, why should it be added to -stable releases?

Sorry, not going to take it, upgrade to 4.1 if you want this feature.

greg k-h
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