powerpc: Invalidate ERAT on powersave wakeup for POWER9

[bugproxy]

== Comment: #0 - Breno Leitao <email address hidden> - 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/

[Breno Leitão (breno-leitao)]

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

[Launchpad Janitor (janitor)]

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
   ...

[Kleber Sacilotto de Souza (kleber-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!

[Breno Leitão (breno-leitao)]

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

[Launchpad Janitor (janitor)]

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 res...