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[Launchpad Bug Tracker <1357108@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.16.0-10.15

---------------
linux (3.16.0-10.15) utopic; urgency=low

  [ dann frazier ]

  * [debian] Fix regression with ABI subversions and backport

  [ Feng Kan ]

  * SAUCE: (no-up) irqchip:gic: change access of gicc_ctrl register to read
    modify write.
    - LP: #1357527
  * SAUCE: (no-up) arm64: optimized copy_to_user and copy_from_user
    assembly code
    - LP: #1358949

  [ Stefan Bader ]

  * SAUCE: bcache: prevent crash on changing writeback_running
    - LP: #1357295

  [ Tim Gardner ]

  * [Config] CONFIG_XFRM_STATISTICS=y
  * [Config] CONFIG_SECURITY_NETWORK_XFRM=y
  * [Config] CONFIG_SENSORS_IBMPOWERNV=m
    - LP: #1353005
  * Release Tracking Bug
    - LP: #1359783

  [ Upstream Kernel Changes ]

  * intel_idle: Broadwell support
    - LP: #1256170
  * powerpc/book3s: Add basic infrastructure to handle HMI in Linux.
    - LP: #1357108
  * powerpc/powernv: Invoke opal call to handle hmi.
    - LP: #1357108
  * powerpc/book3s: handle HMIs for cpus in nap mode.
    - LP: #1357108
  * powerpc/book3s: Fix endianess issue for HMI handling on napping cpus.
    - LP: #1357108
  * powerpc: Add smp_mb() to arch_spin_is_locked()
    - LP: #1358569
  * powerpc: Add smp_mb()s to arch_spin_unlock_wait()
    - LP: #1358569
  * hwmon: (powerpc/powernv) hwmon driver for power, fan rpm, voltage and
    temperature
    - LP: #1353005
  * tools/testing/selftests/ptrace/peeksiginfo.c: add PAGE_SIZE definition
    - LP: #1358855
  * printk: Add function to return log buffer address and size
    - LP: #1359423
  * powerpc/powernv: Interface to register/unregister opal dump region
    - LP: #1359423
  * bcache: fix crash on shutdown in passthrough mode
    - LP: #1357295
  * bcache: fix uninterruptible sleep in writeback thread
    - LP: #1357295

  [ Vinayak Kale ]

  * SAUCE: (no-up) dt-bindings: Add Potenza PMU binding
    - LP: #1357527
  * SAUCE: (no-up) arm64: dts: Add PMU node for APM X-Gene Storm SOC
    - LP: #1357527
 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>   Fri, 15 Aug 2014 12:34:33 -0600

** Changed in: linux (Ubuntu Utopic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1357108

Title:
  Support for HMI (Hypervisor Maintenance Interrupt) handling in ubuntu
  14.10

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  ---Problem Description---
  There is no HMI feature support present in ubuntu distro currently. Upstream kernel now has support for HMI handling in Linux. We want push this support into ubuntu 14.10. The related upstream commit are listed below:

  db97eff powerpc/book3s: Fix endianess issue for HMI handling on napping cpus.
  bbdb760 powerpc/book3s: handle HMIs for cpus in nap mode.
  0ef95b4 powerpc/powernv: Invoke opal call to handle hmi.
  0869b6f powerpc/book3s: Add basic infrastructure to handle HMI in Linux.

  Please include these commits in ubuntu 14.10
   
  Canonical, the patches (cherry-picked) should apply fine over kernel 3.16

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