[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-26 Thread Seth Forshee 
** Changed in: linux (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

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Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fixes ==
  Artful/Bionic:
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  Xenial:
  ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747090/+subscriptions

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[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-21 Thread Launchpad Bug Tracker 
This bug was fixed in the package linux - 4.4.0-116.140

---
linux (4.4.0-116.140) xenial; urgency=medium

  * linux: 4.4.0-116.140 -proposed tracker (LP: #1748990)

  * BUG: unable to handle kernel NULL pointer dereference at 0009
(LP: #1748671)
- SAUCE: net: ipv4: fix for a race condition in raw_sendmsg -- fix backport

linux (4.4.0-115.139) xenial; urgency=medium

  * linux: 4.4.0-115.138 -proposed tracker (LP: #1748745)

  * CVE-2017-5715 (Spectre v2 Intel)
- Revert "UBUNTU: SAUCE: turn off IBPB when full retpoline is present"
- SAUCE: turn off IBRS when full retpoline is present
- [Packaging] retpoline files must be sorted
- [Packaging] pull in retpoline files

linux (4.4.0-114.137) xenial; urgency=medium

  * linux: 4.4.0-114.137 -proposed tracker (LP: #1748484)

  * ALSA backport missing NVIDIA GPU codec IDs to patch table to
Ubuntu 16.04 LTS Kernel (LP: #1744117)
- ALSA: hda - Add missing NVIDIA GPU codec IDs to patch table

  * Shutdown hang on 16.04 with iscsi targets (LP: #1569925)
- scsi: libiscsi: Allow sd_shutdown on bad transport

  * libata: apply MAX_SEC_1024 to all LITEON EP1 series devices (LP: #1743053)
- libata: apply MAX_SEC_1024 to all LITEON EP1 series devices

  * KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)
(LP: #1747090)
- KVM: s390: wire up bpb feature
- KVM: s390: Enable all facility bits that are known good for passthrough

  * CVE-2017-5715 (Spectre v2 Intel)
- SAUCE: drop lingering gmb() macro
- x86/feature: Enable the x86 feature to control Speculation
- x86/feature: Report presence of IBPB and IBRS control
- x86/enter: MACROS to set/clear IBRS and set IBPB
- x86/enter: Use IBRS on syscall and interrupts
- x86/idle: Disable IBRS entering idle and enable it on wakeup
- x86/idle: Disable IBRS when offlining cpu and re-enable on wakeup
- x86/mm: Set IBPB upon context switch
- x86/mm: Only set IBPB when the new thread cannot ptrace current thread
- x86/kvm: add MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD to kvm
- x86/kvm: Set IBPB when switching VM
- x86/kvm: Toggle IBRS on VM entry and exit
- x86/spec_ctrl: Add sysctl knobs to enable/disable SPEC_CTRL feature
- x86/spec_ctrl: Add lock to serialize changes to ibrs and ibpb control
- x86/cpu/amd, kvm: Satisfy guest kernel reads of IC_CFG MSR
- x86/cpu/AMD: Add speculative control support for AMD
- x86/microcode: Extend post microcode reload to support IBPB feature
- KVM: SVM: Do not intercept new speculative control MSRs
- x86/svm: Set IBRS value on VM entry and exit
- x86/svm: Set IBPB when running a different VCPU
- KVM: x86: Add speculative control CPUID support for guests
- SAUCE: Fix spec_ctrl support in KVM
- SAUCE: turn off IBPB when full retpoline is present

linux (4.4.0-113.136) xenial; urgency=low

  * linux: 4.4.0-113.136 -proposed tracker (LP: #1746936)

  [ Stefan Bader ]
  * Missing install-time driver for QLogic QED 25/40/100Gb Ethernet NIC
(LP: #1743638)
- [d-i] Add qede to nic-modules udeb

  * CVE-2017-5753 (Spectre v1 Intel)
- x86/cpu/AMD: Make the LFENCE instruction serialized
- x86/cpu/AMD: Remove now unused definition of MFENCE_RDTSC feature
- SAUCE: reinstate MFENCE_RDTSC feature definition
- locking/barriers: introduce new observable speculation barrier
- bpf: prevent speculative execution in eBPF interpreter
- x86, bpf, jit: prevent speculative execution when JIT is enabled
- SAUCE: FIX: x86, bpf, jit: prevent speculative execution when JIT is 
enabled
- carl9170: prevent speculative execution
- qla2xxx: prevent speculative execution
- Thermal/int340x: prevent speculative execution
- ipv4: prevent speculative execution
- ipv6: prevent speculative execution
- fs: prevent speculative execution
- net: mpls: prevent speculative execution
- udf: prevent speculative execution
- userns: prevent speculative execution
- SAUCE: claim mitigation via observable speculation barrier
- SAUCE: powerpc: add osb barrier
- SAUCE: s390/spinlock: add osb memory barrier
- SAUCE: arm64: no osb() implementation yet
- SAUCE: arm: no osb() implementation yet

  * CVE-2017-5715 (Spectre v2 retpoline)
- x86/cpuid: Provide get_scattered_cpuid_leaf()
- x86/cpu: Factor out application of forced CPU caps
- x86/cpufeatures: Make CPU bugs sticky
- x86/cpufeatures: Add X86_BUG_CPU_INSECURE
- x86/cpu, x86/pti: Do not enable PTI on AMD processors
- x86/pti: Rename BUG_CPU_INSECURE to BUG_CPU_MELTDOWN
- x86/cpufeatures: Add X86_BUG_SPECTRE_V[12]
- x86/cpu: Merge bugs.c and bugs_64.c
- sysfs/cpu: Add vulnerability folder
- x86/cpu: Implement CPU vulnerabilites sysfs functions
- x86/alternatives: Add missing '\n' at end of ALTERNATIVE inline asm
- x86/mm/32: Move setup_clear_cpu_cap(X86_FEATURE_PCID) earlier
-

[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-21 Thread Launchpad Bug Tracker 
This bug was fixed in the package linux - 4.13.0-36.40

---
linux (4.13.0-36.40) artful; urgency=medium

  * linux: 4.13.0-36.40 -proposed tracker (LP: #1750010)

  * Rebuild without "CVE-2017-5754 ARM64 KPTI fixes" patch set

linux (4.13.0-35.39) artful; urgency=medium

  * linux: 4.13.0-35.39 -proposed tracker (LP: #1748743)

  * CVE-2017-5715 (Spectre v2 Intel)
- Revert "UBUNTU: SAUCE: turn off IBPB when full retpoline is present"
- SAUCE: turn off IBRS when full retpoline is present
- [Packaging] retpoline files must be sorted
- [Packaging] pull in retpoline files

linux (4.13.0-34.37) artful; urgency=medium

  * linux: 4.13.0-34.37 -proposed tracker (LP: #1748475)

  * libata: apply MAX_SEC_1024 to all LITEON EP1 series devices (LP: #1743053)
- libata: apply MAX_SEC_1024 to all LITEON EP1 series devices

  * KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)
(LP: #1747090)
- KVM: s390: wire up bpb feature

  * artful 4.13 i386 kernels crash after memory hotplug remove (LP: #1747069)
- Revert "mm, memory_hotplug: do not associate hotadded memory to zones 
until
  online"

  * CVE-2017-5715 (Spectre v2 Intel)
- x86/feature: Enable the x86 feature to control Speculation
- x86/feature: Report presence of IBPB and IBRS control
- x86/enter: MACROS to set/clear IBRS and set IBPB
- x86/enter: Use IBRS on syscall and interrupts
- x86/idle: Disable IBRS entering idle and enable it on wakeup
- x86/idle: Disable IBRS when offlining cpu and re-enable on wakeup
- x86/mm: Set IBPB upon context switch
- x86/mm: Only set IBPB when the new thread cannot ptrace current thread
- x86/entry: Stuff RSB for entry to kernel for non-SMEP platform
- x86/kvm: add MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD to kvm
- x86/kvm: Set IBPB when switching VM
- x86/kvm: Toggle IBRS on VM entry and exit
- x86/spec_ctrl: Add sysctl knobs to enable/disable SPEC_CTRL feature
- x86/spec_ctrl: Add lock to serialize changes to ibrs and ibpb control
- x86/cpu/AMD: Add speculative control support for AMD
- x86/microcode: Extend post microcode reload to support IBPB feature
- KVM: SVM: Do not intercept new speculative control MSRs
- x86/svm: Set IBRS value on VM entry and exit
- x86/svm: Set IBPB when running a different VCPU
- KVM: x86: Add speculative control CPUID support for guests
- SAUCE: turn off IBPB when full retpoline is present

  * Artful 4.13 fixes for tun (LP: #1748846)
- tun: call dev_get_valid_name() before register_netdevice()
- tun: allow positive return values on dev_get_valid_name() call
- tun/tap: sanitize TUNSETSNDBUF input

  * boot failure on AMD Raven + WestonXT (LP: #1742759)
- SAUCE: drm/amdgpu: add atpx quirk handling (v2)

linux (4.13.0-33.36) artful; urgency=low

  * linux: 4.13.0-33.36 -proposed tracker (LP: #1746903)

  [ Stefan Bader ]
  * starting VMs causing retpoline4 to reboot (LP: #1747507) // CVE-2017-5715
(Spectre v2 retpoline)
- x86/retpoline: Fill RSB on context switch for affected CPUs
- x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros
- x86/retpoline: Optimize inline assembler for vmexit_fill_RSB
- x86/retpoline: Remove the esp/rsp thunk
- x86/retpoline: Simplify vmexit_fill_RSB()

  * Missing install-time driver for QLogic QED 25/40/100Gb Ethernet NIC
(LP: #1743638)
- [d-i] Add qede to nic-modules udeb

  * hisi_sas: driver robustness fixes (LP: #1739807)
- scsi: hisi_sas: fix reset and port ID refresh issues
- scsi: hisi_sas: avoid potential v2 hw interrupt issue
- scsi: hisi_sas: fix v2 hw underflow residual value
- scsi: hisi_sas: add v2 hw DFX feature
- scsi: hisi_sas: add irq and tasklet cleanup in v2 hw
- scsi: hisi_sas: service interrupt ITCT_CLR interrupt in v2 hw
- scsi: hisi_sas: fix internal abort slot timeout bug
- scsi: hisi_sas: us start_phy in PHY_FUNC_LINK_RESET
- scsi: hisi_sas: fix NULL check in SMP abort task path
- scsi: hisi_sas: fix the risk of freeing slot twice
- scsi: hisi_sas: kill tasklet when destroying irq in v3 hw
- scsi: hisi_sas: complete all tasklets prior to host reset

  * [Artful/Zesty] ACPI APEI error handling bug fixes (LP: #1732990)
- ACPI: APEI: fix the wrong iteration of generic error status block
- ACPI / APEI: clear error status before acknowledging the error

  * [Zesty/Artful] On ARM64 PCIE physical function passthrough guest fails to
boot (LP: #1732804)
- vfio/pci: Virtualize Maximum Payload Size
- vfio/pci: Virtualize Maximum Read Request Size

  * hisi_sas: Add ATA command support for SMR disks (LP: #1739891)
- scsi: hisi_sas: support zone management commands

  * thunderx2: i2c driver PEC and ACPI clock fixes (LP: #1738073)
- ACPI / APD: Add clock frequency for ThunderX2 I2C controller
- i2c: xlp9xx: Get clock frequency with clk API
- i2c: xlp9xx: Handle

[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-14 Thread 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-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-
artful'.

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-artful

** Tags added: verification-needed-xenial

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Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fixes ==
  Artful/Bionic:
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  Xenial:
  ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747090/+subscriptions

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[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-14 Thread 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-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verification-needed-xenial' to 'verification-failed-
xenial'.

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!

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1747090

Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fixes ==
  Artful/Bionic:
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  Xenial:
  ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747090/+subscriptions

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[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-09 Thread Khaled El Mously 
** Changed in: linux (Ubuntu Artful)
   Status: In Progress => Fix Committed

** Changed in: linux (Ubuntu Xenial)
   Status: In Progress => Fix Committed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1747090

Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fixes ==
  Artful/Bionic:
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  Xenial:
  ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747090/+subscriptions

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[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-03 Thread Seth Forshee 
** Changed in: linux (Ubuntu Bionic)
   Status: In Progress => Fix Committed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1747090

Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fixes ==
  Artful/Bionic:
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  Xenial:
  ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747090/+subscriptions

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[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-02 Thread Joseph Salisbury 
** Description changed:

- 
  == SRU Justification ==
- Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility 
- bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour 
+ Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
+ bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.
  
  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560
  
  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/
  
- == Fix ==
- commit 35b3fde6203b932b2b1a5b53b3d8808abc9c4f60
- Author: Christian Borntraeger 
- Date:   Wed Jan 17 14:44:34 2018 +0100
+ == Fixes ==
+ Artful/Bionic:
+ 35b3fde6203b ("KVM: s390: wire up bpb feature")
  
- KVM: s390: wire up bpb feature
+ Xenial:
+ ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
+ 35b3fde6203b ("KVM: s390: wire up bpb feature")
  
  
  == Regression Potential ==
  Low, this fix is limited to s390.
  
  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1747090

Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fixes ==
  Artful/Bionic:
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  Xenial:
  ed8dda0bf74b ("Enable all facility bits that are known good for passthrough")
  35b3fde6203b ("KVM: s390: wire up bpb feature")

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747090/+subscriptions

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[Kernel-packages] [Bug 1747090] Re: KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

2018-02-02 Thread Joseph Salisbury 
** Description changed:

+ 
  == SRU Justification ==
- 
+ Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility 
+ bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour 
+ changes.
+ 
+ This is the public bug for SRU.  There is also a priave bug report:
+ http://bugs.launchpad.net/bugs/1743560
+ 
+ There is a qemu portion to this fix:
+ http://patchwork.ozlabs.org/cover/862801/
  
  == Fix ==
+ commit 35b3fde6203b932b2b1a5b53b3d8808abc9c4f60
+ Author: Christian Borntraeger 
+ Date:   Wed Jan 17 14:44:34 2018 +0100
+ 
+ KVM: s390: wire up bpb feature
+ 
  
  == Regression Potential ==
+ Low, this fix is limited to s390.
  
  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

-- 
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https://bugs.launchpad.net/bugs/1747090

Title:
  KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  
  == SRU Justification ==
  Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility 
  bits 81 (ppa15) and 82 (bpb).  This is required for branch prediction 
behaviour 
  changes.

  This is the public bug for SRU.  There is also a priave bug report:
  http://bugs.launchpad.net/bugs/1743560

  There is a qemu portion to this fix:
  http://patchwork.ozlabs.org/cover/862801/

  == Fix ==
  commit 35b3fde6203b932b2b1a5b53b3d8808abc9c4f60
  Author: Christian Borntraeger 
  Date:   Wed Jan 17 14:44:34 2018 +0100

  KVM: s390: wire up bpb feature

  
  == Regression Potential ==
  Low, this fix is limited to s390.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.

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