ERAT invalidate on context switch removal

Patch submitted to kernel-team mailing list:

https://lists.ubuntu.com/archives/kernel-team/2017-June/085205.html

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!

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...

This bug was fixed in the package linux - 4.11.0-13.19

---------------
linux (4.11.0-13.19) artful; urgency=low

  * CVE-2017-7533
    - dentry name snapshots

linux (4.11.0-12.18) artful; urgency=low

  * linux: 4.11.0-12.18 -proposed tracker (LP: #1707635)
    - no change rebuild to pick up the new binutils.

  * Adt tests of src:linux time out often on armhf lxc containers (LP: #1705495)
    - [Packaging] tests -- reduce rebuild test to one flavour
    - [Packaging] tests -- reduce rebuild test to one flavour -- use filter

  * [ARM64] config EDAC_GHES=y depends on EDAC_MM_EDAC=y (LP: #1706141)
    - [Config] set EDAC_MM_EDAC=y for ARM64

  * [Hyper-V] hv_netvsc: Exclude non-TCP port numbers from vRSS hashing
    (LP: #1690174)
    - hv_netvsc: Exclude non-TCP port numbers from vRSS hashing

  * ath10k doesn't report full RSSI information (LP: #1706531)
    - ath10k: add per chain RSSI reporting

  * ideapad_laptop don't support v310-14isk (LP: #1705378)
    - platform/x86: ideapad-laptop: Add several models to no_hw_rfkill

  * Ubuntu 16.04.3: Qemu fails on P9 (LP: #1686019)
    - KVM: PPC: Pass kvm* to kvmppc_find_table()
    - KVM: PPC: Use preregistered memory API to access TCE list
    - KVM: PPC: VFIO: Add in-kernel acceleration for VFIO
    - powerpc/powernv/iommu: Add real mode version of iommu_table_ops::exchange()
    - powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal
    - powerpc/vfio_spapr_tce: Add reference counting to iommu_table
    - powerpc/mmu: Add real mode support for IOMMU preregistered memory
    - KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number
    - KVM: PPC: Book3S HV: Add radix checks in real-mode hypercall handlers

  * hns: ethtool selftest crashes system (LP: #1705712)
    - net/hns:bugfix of ethtool -t phy self_test

  * ThunderX: soft lockup on 4.8+ kernels when running qemu-efi with vhost=on
    (LP: #1673564)
    - KVM: arm/arm64: vgic-v3: Use PREbits to infer the number of ICH_APxRn_EL2
      registers
    - KVM: arm/arm64: vgic-v3: Fix nr_pre_bits bitfield extraction
    - arm64: Add a facility to turn an ESR syndrome into a sysreg encoding
    - KVM: arm/arm64: vgic-v3: Add accessors for the ICH_APxRn_EL2 registers
    - KVM: arm64: Make kvm_condition_valid32() accessible from EL2
    - KVM: arm64: vgic-v3: Add hook to handle guest GICv3 sysreg accesses at EL2
    - KVM: arm64: vgic-v3: Add ICV_BPR1_EL1 handler
    - KVM: arm64: vgic-v3: Add ICV_IGRPEN1_EL1 handler
    - KVM: arm64: vgic-v3: Add ICV_IAR1_EL1 handler
    - KVM: arm64: vgic-v3: Add ICV_EOIR1_EL1 handler
    - KVM: arm64: vgic-v3: Add ICV_AP1Rn_EL1 handler
    - KVM: arm64: vgic-v3: Add ICV_HPPIR1_EL1 handler
    - KVM: arm64: vgic-v3: Enable trapping of Group-1 system registers
    - KVM: arm64: Enable GICv3 Group-1 sysreg trapping via command-line
    - KVM: arm64: vgic-v3: Add ICV_BPR0_EL1 handler
    - KVM: arm64: vgic-v3: Add ICV_IGNREN0_EL1 handler
    - KVM: arm64: vgic-v3: Add misc Group-0 handlers
    - KVM: arm64: vgic-v3: Enable trapping of Group-0 system registers
    - KVM: arm64: Enable GICv3 Group-0 sysreg trapping via command-line
    - arm64: Add MIDR values for Cavium cn83XX SoCs
    - arm64: Add wor...