[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: Fix Committed => Fix Released

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.10.0-30.34

---
linux (4.10.0-30.34) zesty; urgency=low

  * CVE-2017-7533
- dentry name snapshots

linux (4.10.0-29.33) zesty; urgency=low

  * linux: 4.10.0-29.33 -proposed tracker (LP: #1704961)

  * Opal and POWER9 DD2 (LP: #1702159)
- powerpc/powernv: Tell OPAL about our MMU mode on POWER9
- powerpc/powernv: Fix boot on Power8 bare metal due to 
opal_configure_cores()

  * CVE-2017-1000364
- mm/mmap.c: do not blow on PROT_NONE MAP_FIXED holes in the stack
- mm/mmap.c: expand_downwards: don't require the gap if !vm_prev

  * [Xenial] nvme: Quirks for PM1725 controllers (LP: #1704435)
- nvme: Quirks for PM1725 controllers

  * hns: under heavy load, NIC may fail and require reboot (LP: #1704146)
- net: hns: Bugfix for Tx timeout handling in hns driver

  * New ACPI identifiers for ThunderX SMMU (LP: #1703437)
- iommu/arm-smmu: Plumb in new ACPI identifiers

  * CVE-2017-7482
- rxrpc: Fix several cases where a padded len isn't checked in ticket decode

  * CVE-2017-1000365
- fs/exec.c: account for argv/envp pointers

  * CVE-2017-10810
- drm/virtio: don't leak bo on drm_gem_object_init failure

  * Data corruption with hio driver  (LP: #1701316)
- SAUCE: hio: Fix incorrect use of enum req_opf values

  * arm64: fix crash reading /proc/kcore (LP: #1702749)
- fs/proc: kcore: use kcore_list type to check for vmalloc/module address
- arm64: mm: select CONFIG_ARCH_PROC_KCORE_TEXT

  * cxlflash update request in the Xenial SRU stream (LP: #1702521)
- scsi: cxlflash: Refactor context reset to share reset logic
- scsi: cxlflash: Support SQ Command Mode
- scsi: cxlflash: Cleanup prints
- scsi: cxlflash: Cancel scheduled workers before stopping AFU
- scsi: cxlflash: Enable PCI device ID for future IBM CXL Flash AFU
- scsi: cxlflash: Separate RRQ processing from the RRQ interrupt handler
- scsi: cxlflash: Serialize RRQ access and support offlevel processing
- scsi: cxlflash: Implement IRQ polling for RRQ processing
- scsi: cxlflash: Update sysfs helper routines to pass config structure
- scsi: cxlflash: Support dynamic number of FC ports
- scsi: cxlflash: Remove port configuration assumptions
- scsi: cxlflash: Hide FC internals behind common access routine
- scsi: cxlflash: SISlite updates to support 4 ports
- scsi: cxlflash: Support up to 4 ports
- scsi: cxlflash: Fence EEH during probe
- scsi: cxlflash: Remove unnecessary DMA mapping
- scsi: cxlflash: Fix power-of-two validations
- scsi: cxlflash: Fix warnings/errors
- scsi: cxlflash: Improve asynchronous interrupt processing
- scsi: cxlflash: Support multiple hardware queues
- scsi: cxlflash: Add hardware queues attribute
- scsi: cxlflash: Introduce hardware queue steering
- cxl: Enable PCI device IDs for future IBM CXL adapters
- scsi: cxlflash: Select IRQ_POLL
- scsi: cxlflash: Combine the send queue locks
- scsi: cxlflash: Update cxlflash_afu_sync() to return errno
- scsi: cxlflash: Reset hardware queue context via specified register
- scsi: cxlflash: Schedule asynchronous reset of the host
- scsi: cxlflash: Handle AFU sync failures
- scsi: cxlflash: Track pending scsi commands in each hardware queue
- scsi: cxlflash: Flush pending commands in cleanup path
- scsi: cxlflash: Add scsi command abort handler
- scsi: cxlflash: Create character device to provide host management 
interface
- scsi: cxlflash: Separate AFU internal command handling from AFU sync
  specifics
- scsi: cxlflash: Introduce host ioctl support
- scsi: cxlflash: Refactor AFU capability checking
- scsi: cxlflash: Support LUN provisioning
- scsi: cxlflash: Support AFU debug
- scsi: cxlflash: Support WS16 unmap
- scsi: cxlflash: Remove zeroing of private command data
- scsi: cxlflash: Update TMF command processing
- scsi: cxlflash: Avoid double free of character device
- scsi: cxlflash: Update send_tmf() parameters
- scsi: cxlflash: Update debug prints in reset handlers

  * Ath10k to read different board data file if specify in SMBIOS (LP: #1666742)
- ath10k: search SMBIOS for OEM board file extension

  * APST gets enabled against explicit kernel option (LP: #1699004)
- nvme: Display raw APST configuration via DYNAMIC_DEBUG
- nvme: Add nvme_core.force_apst to ignore the NO_APST quirk
- nvme: explicitly disable APST on quirked devices

  * Quirk for non-compliant PCI bridge on HiSilicon D05 board (LP: #1698706)
- SAUCE: PCI: Support hibmc VGA cards behind a misbehaving HiSilicon bridge

  * New NVLINK2 patches (LP: #1701272)
- powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD
- powerpc/npu-dma: Remove spurious WARN_ON when a PCI device has no of_node

  * ERAT invalidate on context switch removal (LP: #1700819)
- powerpc: Only do ERAT invalidate on radix context 

[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Breno Leitão]

Tested it on my machine and the original problem was not seen.


** Tags removed: verification-needed-zesty
** Tags added: verification-done-zesty

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Manoj Iyer]

** Tags added: triage-g

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Zesty)
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: Fix Released => Fix Committed

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Kleber Sacilotto de Souza]

This bug is awaiting verification that the 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-
zesty' to 'verification-done-zesty'. If the problem still exists, change
the tag 'verification-needed-zesty' to 'verification-failed-zesty'.

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: verification-needed-zesty

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Kleber Sacilotto de Souza]

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

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Joseph Salisbury]

** Changed in: ubuntu-power-systems
   Status: Fix Committed => Fix Released

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

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.11.0-10.15

---
linux (4.11.0-10.15) artful; urgency=low

  * linux: 4.11.0-10.15 -proposed tracker (LP: #1701271)

  * Artful update to v4.11.8 stable release (LP: #1701269)
- clk: sunxi-ng: a31: Correct lcd1-ch1 clock register offset
- clk: sunxi-ng: v3s: Fix usb otg device reset bit
- clk: sunxi-ng: sun5i: Fix ahb_bist_clk definition
- xen/blkback: fix disconnect while I/Os in flight
- xen-blkback: don't leak stack data via response ring
- ALSA: firewire-lib: Fix stall of process context at packet error
- ALSA: pcm: Don't treat NULL chmap as a fatal error
- ALSA: hda - Add Coffelake PCI ID
- ALSA: hda - Apply quirks to Broxton-T, too
- fs/exec.c: account for argv/envp pointers
- powerpc/perf: Fix oops when kthread execs user process
- autofs: sanity check status reported with AUTOFS_DEV_IOCTL_FAIL
- fs/dax.c: fix inefficiency in dax_writeback_mapping_range()
- lib/cmdline.c: fix get_options() overflow while parsing ranges
- perf/x86/intel: Add 1G DTLB load/store miss support for SKL
- perf probe: Fix probe definition for inlined functions
- KVM: x86: fix singlestepping over syscall
- KVM: MIPS: Fix maybe-uninitialized build failure
- KVM: s390: gaccess: fix real-space designation asce handling for gmap
  shadows
- KVM: PPC: Book3S HV: Cope with host using large decrementer mode
- KVM: PPC: Book3S HV: Preserve userspace HTM state properly
- KVM: PPC: Book3S HV: Ignore timebase offset on POWER9 DD1
- KVM: PPC: Book3S HV: Context-switch EBB registers properly
- KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit
- KVM: PPC: Book3S HV: Save/restore host values of debug registers
- CIFS: Improve readdir verbosity
- CIFS: Fix some return values in case of error in 'crypt_message'
- cxgb4: notify uP to route ctrlq compl to rdma rspq
- HID: Add quirk for Dell PIXART OEM mouse
- random: silence compiler warnings and fix race
- signal: Only reschedule timers on signals timers have sent
- powerpc/kprobes: Pause function_graph tracing during jprobes handling
- powerpc/64s: Handle data breakpoints in Radix mode
- Input: i8042 - add Fujitsu Lifebook AH544 to notimeout list
- brcmfmac: add parameter to pass error code in firmware callback
- brcmfmac: use firmware callback upon failure to load
- brcmfmac: unbind all devices upon failure in firmware callback
- time: Fix clock->read(clock) race around clocksource changes
- time: Fix CLOCK_MONOTONIC_RAW sub-nanosecond accounting
- arm64/vdso: Fix nsec handling for CLOCK_MONOTONIC_RAW
- target: Fix kref->refcount underflow in transport_cmd_finish_abort
- iscsi-target: Fix delayed logout processing greater than
  SECONDS_FOR_LOGOUT_COMP
- iscsi-target: Reject immediate data underflow larger than SCSI transfer
  length
- drm/radeon: add a PX quirk for another K53TK variant
- drm/radeon: add a quirk for Toshiba Satellite L20-183
- drm/amdgpu/atom: fix ps allocation size for EnableDispPowerGating
- drm/amdgpu: adjust default display clock
- drm/amdgpu: add Polaris12 DID
- ACPI / scan: Apply default enumeration to devices with ACPI drivers
- ACPI / scan: Fix enumeration for special SPI and I2C devices
- rxrpc: Fix several cases where a padded len isn't checked in ticket decode
- drm: Fix GETCONNECTOR regression
- usb: gadget: f_fs: avoid out of bounds access on comp_desc
- spi: double time out tolerance
- net: phy: fix marvell phy status reading
- brcmfmac: fix uninitialized warning in brcmf_usb_probe_phase2()
- Linux 4.11.8

  * powerpc: Invalidate ERAT on powersave wakeup for POWER9 (LP: #1700521)
- SAUCE: powerpc: Invalidate ERAT on powersave wakeup for POWER9

  * Miscellaneous Ubuntu changes
- d-i: Move qcom-emac from arm64 to shared nic-modules

 -- Seth Forshee   Thu, 29 Jun 2017 08:46:53
-0500

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

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  

[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: Triaged => Fix Committed

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1700521/+subscriptions

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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Thadeu Lima de Souza Cascardo]

** Changed in: linux (Ubuntu Zesty)
   Status: New => Fix Committed

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: New => Triaged

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  New

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Seth Forshee]

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
   Status: New

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

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  New
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  New

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Breno Leitão]

patch sent to kernel-team mailing list:
https://lists.ubuntu.com/archives/kernel-team/2017-June/085197.html

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Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1700521/+subscriptions

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[Kernel-packages] [Bug 1700521] Re: powerpc: Invalidate ERAT on powersave wakeup for POWER9

[Frank Heimes]

** Also affects: ubuntu-power-systems
   Importance: Undecided
   Status: New

** Changed in: ubuntu-power-systems
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

** Changed in: ubuntu-power-systems
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1700521

Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Breno Leitao  - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1700521/+subscriptions

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