Sync FSGSBASE patches in azure kernel with mainline

[Marcelo Cerri]

[Impact]

To include the missing upstream patches to the 4.15 and 5.4 kernel.

* x86/entry/64: Do not use RDPID in paranoid entry to accommodate KVM:
- occasional random failure when running KVM
* x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
- Google folks found this when running their fuzzy test cases. Don't know how realistic this can hit.
* x86/fsgsbase: Fix Xen PV support
* x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
- these two are for VMMs.

Some of these are already included in our azure kernels. 5.8 doesn't need them because we already synced with upstream while preparing it.

[Test Case]

Since we are syncing with mainline a boot test and a regression test in ACC instances should be enough to confirm the changes are working.

Since these instances are not publicly available yet, Msft is helping us to test this changes.

[Where problems could occur]

This affects the SGX driver that is only available on ACC instances (which is not widely used yet).

[Marcelo Cerri (mhcerri)]

Submitted to SRU:

https://lists.ubuntu.com/archives/kernel-team/2021-January/116803.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116804.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116805.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116806.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116807.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116808.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116809.html
https://lists.ubuntu.com/archives/kernel-team/2021-January/116810.html

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 5.4.0-1040.42

---------------
linux-azure (5.4.0-1040.42) focal; urgency=medium

  * focal/linux-azure: 5.4.0-1040.42 -proposed tracker (LP: #1913138)

  * Focal update: v5.4.80 upstream stable release (LP: #1908561)
    - [Config] azure: updateconfigs for INFINIBAND_VIRT_DMA

  * Focal update: v5.4.84 upstream stable release (LP: #1910816)
    - [Config] azure: updateconfigs for PGTABLE_MAPPING

  * CIFS: Request for backport (LP: #1911438)
    - cifs: fix interrupted close commands
    - cifs: do not fail __smb_send_rqst if non-fatal signals are pending

  * Sync FSGSBASE patches in azure kernel with mainline (LP: #1913294)
    - x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
    - x86/entry/64: Do not use RDPID in paranoid entry to accomodate KVM

  * Revert or drop obsolete patches for PCI (LP: #1911205)
    - Revert "UBUNTU: SAUCE: pci-hyperv: Use only 16 bit integer for PCI domain"
    - Revert "Revert "PCI: hv: Make sure the bus domain is really unique""

  * Disable Atari partition support for cloud kernels (LP: #1908264)
    - [Config] azure: Disable ATARI_PARTITION

  * Enable boot from NVMe device for all images (LP: #1908571)
    - [Config] azure: CONFIG_PCI_HYPERV=y

  [ Ubuntu: 5.4.0-66.74 ]

  * focal/linux: 5.4.0-66.74 -proposed tracker (LP: #1913152)
  * Add support for selective build of special drivers (LP: #1912789)
    - [Packaging] Add support for ODM drivers
    - [Packaging] Turn on ODM support for amd64
  * Packaging resync (LP: #1786013)
    - update dkms package versions
    - update dkms package versions
  * Introduce the new NVIDIA 460-server series and update the 460 series
    (LP: #1913200)
    - [Config] dkms-versions -- drop NVIDIA 435 455 and 440-server
    - [Config] dkms-versions -- add the 460-server nvidia driver
  * Enable mute and micmute LED on HP EliteBook 850 G7 (LP: #1910102)
    - ALSA: hda/realtek: Enable mute and micmute LED on HP EliteBook 850 G7
  * SYNA30B4:00 06CB:CE09 Mouse on HP EliteBook 850 G7 not working at all
    (LP: #1908992)
    - HID: multitouch: Enable multi-input for Synaptics pointstick/touchpad device
  * HD Audio Device PCI ID for the Intel Cometlake-R platform (LP: #1912427)
    - SAUCE: ALSA: hda: Add Cometlake-R PCI ID
  * switch to an autogenerated nvidia series based core via dkms-versions
    (LP: #1912803)
    - [Packaging] nvidia -- use dkms-versions to define versions built
    - [Packaging] update-version-dkms -- maintain flags fields
    - [Config] dkms-versions -- add transitional/skip information for nvidia
      packages
  * udpgro.sh in net from ubuntu_kernel_selftests seems not reflecting sub-test
    result (LP: #1908499)
    - selftests: fix the return value for UDP GRO test
  * qede: Kubernetes Internal DNS Failure due to QL41xxx NIC not supporting IPIP
    tx csum offload (LP: #1909062)
    - qede: fix offload for IPIP tunnel packets
  * Use DCPD to control HP DreamColor panel (LP: #1911001)
    - SAUCE: drm/dp: Another HP DreamColor panel brigntness fix
  * kvm: Windows 2k19 with Hyper-v role gets stuck on pending hypervisor
    requests on cascadelake based kvm hosts (LP: #1911848)
    - KVM:...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure-4.15 - 4.15.0-1108.120

---------------
linux-azure-4.15 (4.15.0-1108.120) bionic; urgency=medium

  * bionic/linux-azure-4.15: 4.15.0-1108.120 -proposed tracker (LP: #1915371)

  * Add XDP support to hv_netvsc driver (LP: #1877654)
    - hv_netvsc: pass netvsc_device to receive callback
    - xdp: base API for new XDP rx-queue info concept
    - ixgbe: setup xdp_rxq_info
    - xdp/qede: setup xdp_rxq_info and intro xdp_rxq_info_is_reg
    - tun: setup xdp_rxq_info
    - virtio_net: setup xdp_rxq_info
    - xdp: generic XDP handling of xdp_rxq_info
    - tun/tap: use ptr_ring instead of skb_array
    - tuntap: XDP transmission
    - net: avoid including xdp.h in filter.h
    - virtio_net: fix ndo_xdp_xmit crash towards dev not ready for XDP
    - tuntap: XDP_TX can use native XDP
    - i40e: add support for XDP_REDIRECT
    - xdp: introduce xdp_return_frame API and use in cpumap
    - ixgbe: use xdp_return_frame API
    - xdp: move struct xdp_buff from filter.h to xdp.h
    - xdp: introduce a new xdp_frame type
    - tun: convert to use generic xdp_frame and xdp_return_frame API
    - virtio_net: convert to use generic xdp_frame and xdp_return_frame API
    - bpf: cpumap convert to use generic xdp_frame
    - i40e: convert to use generic xdp_frame and xdp_return_frame API
    - xdp: rhashtable with allocator ID to pointer mapping
    - page_pool: refurbish version of page_pool code
    - xdp: allow page_pool as an allocator type in xdp_return_frame
    - xdp: transition into using xdp_frame for return API
    - xdp: transition into using xdp_frame for ndo_xdp_xmit
    - xsk: add user memory registration support sockopt
    - xsk: add umem fill queue support and mmap
    - xsk: add Rx queue setup and mmap support
    - xsk: add support for bind for Rx
    - xsk: add Rx receive functions and poll support
    - bpf: devmap introduce dev_map_enqueue
    - bpf: devmap prepare xdp frames for bulking
    - xdp: introduce xdp_return_frame_rx_napi
    - xdp: add MEM_TYPE_ZERO_COPY
    - hv_netvsc: Add support for LRO/RSC in the vSwitch
    - hv_netvsc: Refactor assignments of struct netvsc_device_info
    - hv_netvsc: Add XDP support
    - hv_netvsc: Update document for XDP support
    - hv_netvsc: Fix XDP refcnt for synthetic and VF NICs

  * Sync FSGSBASE patches in azure kernel with mainline (LP: #1913294)
    - x86/kvm/vmx: read MSR_{FS, KERNEL_GS}_BASE from current->thread
    - x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
    - x86/entry/64: Do not use RDPID in paranoid entry to accomodate KVM

  * Disable Atari partition support for cloud kernels (LP: #1908264)
    - [Config] azure: Disable ATARI_PARTITION

  * Enable boot from NVMe device for all images (LP: #1908571)
    - [Config] azure: CONFIG_PCI_HYPERV=y

  [ Ubuntu: 4.15.0-136.140 ]

  * bionic/linux: 4.15.0-136.140 -proposed tracker (LP: #1913117)
  * Packaging resync (LP: #1786013)
    - update dkms package versions
    - update dkms package versions
  * Introduce the new NVIDIA 460-server series and update the 460 series
    (LP: #1913200)
    - [Config] dkms-versions -- drop NVIDIA 435 455 and 440-server
    - [Config] dkms...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 4.15.0-1108.120~16.04.1

---------------
linux-azure (4.15.0-1108.120~16.04.1) xenial; urgency=medium

  * xenial/linux-azure: 4.15.0-1108.120~16.04.1 -proposed tracker (LP: #1915370)

  * Enable boot from NVMe device for all images (LP: #1908571)
    - [Config] azure: Remove pci-hyperv from module list

  * stop building nvidia dkms on kernels with no lrm (LP: #1910749)
    - [Packaging]: Stop building nvidia dkms

  [ Ubuntu: 4.15.0-1108.120 ]

  * bionic/linux-azure-4.15: 4.15.0-1108.120 -proposed tracker (LP: #1915371)
  * Add XDP support to hv_netvsc driver (LP: #1877654)
    - hv_netvsc: pass netvsc_device to receive callback
    - xdp: base API for new XDP rx-queue info concept
    - ixgbe: setup xdp_rxq_info
    - xdp/qede: setup xdp_rxq_info and intro xdp_rxq_info_is_reg
    - tun: setup xdp_rxq_info
    - virtio_net: setup xdp_rxq_info
    - xdp: generic XDP handling of xdp_rxq_info
    - tun/tap: use ptr_ring instead of skb_array
    - tuntap: XDP transmission
    - net: avoid including xdp.h in filter.h
    - virtio_net: fix ndo_xdp_xmit crash towards dev not ready for XDP
    - tuntap: XDP_TX can use native XDP
    - i40e: add support for XDP_REDIRECT
    - xdp: introduce xdp_return_frame API and use in cpumap
    - ixgbe: use xdp_return_frame API
    - xdp: move struct xdp_buff from filter.h to xdp.h
    - xdp: introduce a new xdp_frame type
    - tun: convert to use generic xdp_frame and xdp_return_frame API
    - virtio_net: convert to use generic xdp_frame and xdp_return_frame API
    - bpf: cpumap convert to use generic xdp_frame
    - i40e: convert to use generic xdp_frame and xdp_return_frame API
    - xdp: rhashtable with allocator ID to pointer mapping
    - page_pool: refurbish version of page_pool code
    - xdp: allow page_pool as an allocator type in xdp_return_frame
    - xdp: transition into using xdp_frame for return API
    - xdp: transition into using xdp_frame for ndo_xdp_xmit
    - xsk: add user memory registration support sockopt
    - xsk: add umem fill queue support and mmap
    - xsk: add Rx queue setup and mmap support
    - xsk: add support for bind for Rx
    - xsk: add Rx receive functions and poll support
    - bpf: devmap introduce dev_map_enqueue
    - bpf: devmap prepare xdp frames for bulking
    - xdp: introduce xdp_return_frame_rx_napi
    - xdp: add MEM_TYPE_ZERO_COPY
    - hv_netvsc: Add support for LRO/RSC in the vSwitch
    - hv_netvsc: Refactor assignments of struct netvsc_device_info
    - hv_netvsc: Add XDP support
    - hv_netvsc: Update document for XDP support
    - hv_netvsc: Fix XDP refcnt for synthetic and VF NICs
  * Sync FSGSBASE patches in azure kernel with mainline (LP: #1913294)
    - x86/kvm/vmx: read MSR_{FS, KERNEL_GS}_BASE from current->thread
    - x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
    - x86/entry/64: Do not use RDPID in paranoid entry to accomodate KVM
  * Disable Atari partition support for cloud kernels (LP: #1908264)
    - [Config] azure: Disable ATARI_PARTITION
  * Enable boot from NVMe device for all images (LP: #1908571)
    - [Config] azure: CONFIG_PCI_HYPERV=y
  * bionic/linux: 4.15.0-136.14...