aws: Backport linear memory map change

[Philip Cox]

SRU Justification:

[Impact]

AWS discovered an issue of long EC2 instance launch times on the upcoming R8g instance types.

[Fix]

They have identified the following fixes that address this issue:

* https://<email address hidden><email address hidden>/
* https://<email address hidden><email address hidden>/

They would like this fixced in the jammy, and noble kernels.

For reference, here are the links to the above patches in 6.10-rc3:

* arm64: mm: Don't remap pgtables per-cont(pte|pmd) block
https://github.com/torvalds/linux/commit/5c63db59c5f89925add57642be4f789d0d671ccd
* arm64: mm: Batch dsb and isb when populating pgtables
https://github.com/torvalds/linux/commit/1fcb7cea8a5f7747e02230f816c2c80b060d9517

AWS has requested only the first two patches of the series of three patches be back ported.

[Test Plan]
I have tested this, as has AWS.

[Where problems could occur]
With the reordering of tlb invalidation and memory barriers, there is some risk, but this chance for regressions on this change is fairly small as the scope is fairly narrow.

[Other info]
SF# 00387444

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-aws/5.15.0-1065.71 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-jammy-linux-aws' to 'verification-done-jammy-linux-aws'. If the problem still exists, change the tag 'verification-needed-jammy-linux-aws' to 'verification-failed-jammy-linux-aws'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-aws/6.8.0-1011.12 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-noble-linux-aws' to 'verification-done-noble-linux-aws'. If the problem still exists, change the tag 'verification-needed-noble-linux-aws' to 'verification-failed-noble-linux-aws'.

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!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-aws - 5.15.0-1065.71

---------------
linux-aws (5.15.0-1065.71) jammy; urgency=medium

  * jammy/linux-aws: 5.15.0-1065.71 -proposed tracker (LP: #2068345)

  * Packaging resync (LP: #1786013)
    - [Packaging] debian.aws/dkms-versions -- update from kernel-versions
      (main/2024.06.10)

  * aws: Backport linear memory map change (LP: #2069352)
    - arm64: mm: Don't remap pgtables per-cont(pte|pmd) block
    - arm64: mm: Batch dsb and isb when populating pgtables

  [ Ubuntu: 5.15.0-115.125 ]

  * jammy/linux: 5.15.0-115.125 -proposed tracker (LP: #2068396)
  * Packaging resync (LP: #1786013)
    - [Packaging] debian.master/dkms-versions -- update from kernel-versions
      (main/2024.06.10)
  * Jammy update: v5.15.158 upstream stable release (LP: #2067974)
    - smb: client: fix rename(2) regression against samba
    - cifs: reinstate original behavior again for forceuid/forcegid
    - HID: intel-ish-hid: ipc: Fix dev_err usage with uninitialized dev->devc
    - HID: logitech-dj: allow mice to use all types of reports
    - arm64: dts: rockchip: enable internal pull-up on Q7_USB_ID for RK3399 Puma
    - arm64: dts: rockchip: fix alphabetical ordering RK3399 puma
    - arm64: dts: rockchip: enable internal pull-up on PCIE_WAKE# for RK3399 Puma
    - arm64: dts: rockchip: Remove unsupported node from the Pinebook Pro dts
    - arm64: dts: mediatek: mt8183: Add power-domains properity to mfgcfg
    - arm64: dts: mediatek: mt7622: add support for coherent DMA
    - arm64: dts: mediatek: mt7622: introduce nodes for Wireless Ethernet Dispatch
    - arm64: dts: mediatek: mt7622: fix clock controllers
    - arm64: dts: mediatek: mt7622: fix IR nodename
    - arm64: dts: mediatek: mt7622: fix ethernet controller "compatible"
    - arm64: dts: mediatek: mt7622: drop "reset-names" from thermal block
    - arm64: dts: mediatek: mt2712: fix validation errors
    - ARC: [plat-hsdk]: Remove misplaced interrupt-cells property
    - wifi: iwlwifi: mvm: remove old PASN station when adding a new one
    - wifi: iwlwifi: mvm: return uid from iwl_mvm_build_scan_cmd
    - vxlan: drop packets from invalid src-address
    - mlxsw: core: Unregister EMAD trap using FORWARD action
    - icmp: prevent possible NULL dereferences from icmp_build_probe()
    - bridge/br_netlink.c: no need to return void function
    - NFC: trf7970a: disable all regulators on removal
    - ipv4: check for NULL idev in ip_route_use_hint()
    - net: usb: ax88179_178a: stop lying about skb->truesize
    - net: gtp: Fix Use-After-Free in gtp_dellink
    - ipvs: Fix checksumming on GSO of SCTP packets
    - net: openvswitch: Fix Use-After-Free in ovs_ct_exit
    - mlxsw: spectrum_acl_tcam: Fix race during rehash delayed work
    - mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update
    - mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash
    - mlxsw: spectrum_acl_tcam: Rate limit error message
    - mlxsw: spectrum_acl_tcam: Fix memory leak during rehash
    - mlxsw: spectrum_acl_tcam: Fix warning during rehash
    - mlxsw: spectrum_acl_tcam: Fix incorrect list API usage
    - mlxsw: spectrum_acl_tcam: Fix m...

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-aws-5.15/5.15.0-1065.71~20.04.1 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-focal-linux-aws-5.15' to 'verification-done-focal-linux-aws-5.15'. If the problem still exists, change the tag 'verification-needed-focal-linux-aws-5.15' to 'verification-failed-focal-linux-aws-5.15'.

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!