Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

- "panic: sys_info: Refactor and fix a potential issue

Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

- "panic: sys_info: Refactor and fix a potential issue" (Andy Shevchenko)
fixes a build issue and does some cleanup in ib/sys_info.c

- "Implement mul_u64_u64_div_u64_roundup()" (David Laight)
enhances the 64-bit math code on behalf of a PWM driver and beefs up
the test module for these library functions

- "scripts/gdb/symbols: make BPF debug info available to GDB" (Ilya Leoshkevich)
makes BPF symbol names, sizes, and line numbers available to the GDB
debugger

- "Enable hung_task and lockup cases to dump system info on demand" (Feng Tang)
adds a sysctl which can be used to cause additional info dumping when
the hung-task and lockup detectors fire

- "lib/base64: add generic encoder/decoder, migrate users" (Kuan-Wei Chiu)
adds a general base64 encoder/decoder to lib/ and migrates several
users away from their private implementations

- "rbree: inline rb_first() and rb_last()" (Eric Dumazet)
makes TCP a little faster

- "liveupdate: Rework KHO for in-kernel users" (Pasha Tatashin)
reworks the KEXEC Handover interfaces in preparation for Live Update
Orchestrator (LUO), and possibly for other future clients

- "kho: simplify state machine and enable dynamic updates" (Pasha Tatashin)
increases the flexibility of KEXEC Handover. Also preparation for LUO

- "Live Update Orchestrator" (Pasha Tatashin)
is a major new feature targeted at cloud environments. Quoting the
cover letter:

This series introduces the Live Update Orchestrator, a kernel
subsystem designed to facilitate live kernel updates using a
kexec-based reboot. This capability is critical for cloud
environments, allowing hypervisors to be updated with minimal
downtime for running virtual machines. LUO achieves this by
preserving the state of selected resources, such as memory,
devices and their dependencies, across the kernel transition.

As a key feature, this series includes support for preserving
memfd file descriptors, which allows critical in-memory data, such
as guest RAM or any other large memory region, to be maintained in
RAM across the kexec reboot.

Mike Rappaport merits a mention here, for his extensive review and
testing work.

- "kexec: reorganize kexec and kdump sysfs" (Sourabh Jain)
moves the kexec and kdump sysfs entries from /sys/kernel/ to
/sys/kernel/kexec/ and adds back-compatibility symlinks which can
hopefully be removed one day

- "kho: fixes for vmalloc restoration" (Mike Rapoport)
fixes a BUG which was being hit during KHO restoration of vmalloc()
regions

* tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (139 commits)
calibrate: update header inclusion
Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()"
vmcoreinfo: track and log recoverable hardware errors
kho: fix restoring of contiguous ranges of order-0 pages
kho: kho_restore_vmalloc: fix initialization of pages array
MAINTAINERS: TPM DEVICE DRIVER: update the W-tag
init: replace simple_strtoul with kstrtoul to improve lpj_setup
KHO: fix boot failure due to kmemleak access to non-PRESENT pages
Documentation/ABI: new kexec and kdump sysfs interface
Documentation/ABI: mark old kexec sysfs deprecated
kexec: move sysfs entries to /sys/kernel/kexec
test_kho: always print restore status
kho: free chunks using free_page() instead of kfree()
selftests/liveupdate: add kexec test for multiple and empty sessions
selftests/liveupdate: add simple kexec-based selftest for LUO
selftests/liveupdate: add userspace API selftests
docs: add documentation for memfd preservation via LUO
mm: memfd_luo: allow preserving memfd
liveupdate: luo_file: add private argument to store runtime state
mm: shmem: export some functions to internal.h
...

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Merge tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
"Core & protocols:

- Replace busylock at the Tx queuing l

Merge tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
"Core & protocols:

- Replace busylock at the Tx queuing layer with a lockless list.

Resulting in a 300% (4x) improvement on heavy TX workloads, sending
twice the number of packets per second, for half the cpu cycles.

- Allow constantly busy flows to migrate to a more suitable CPU/NIC
queue.

Normally we perform queue re-selection when flow comes out of idle,
but under extreme circumstances the flows may be constantly busy.

Add sysctl to allow periodic rehashing even if it'd risk packet
reordering.

- Optimize the NAPI skb cache, make it larger, use it in more paths.

- Attempt returning Tx skbs to the originating CPU (like we already
did for Rx skbs).

- Various data structure layout and prefetch optimizations from Eric.

- Remove ktime_get() from the recvmsg() fast path, ktime_get() is
sadly quite expensive on recent AMD machines.

- Extend threaded NAPI polling to allow the kthread busy poll for
packets.

- Make MPTCP use Rx backlog processing. This lowers the lock
pressure, improving the Rx performance.

- Support memcg accounting of MPTCP socket memory.

- Allow admin to opt sockets out of global protocol memory accounting
(using a sysctl or BPF-based policy). The global limits are a poor
fit for modern container workloads, where limits are imposed using
cgroups.

- Improve heuristics for when to kick off AF_UNIX garbage collection.

- Allow users to control TCP SACK compression, and default to 33% of
RTT.

- Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid
unnecessarily aggressive rcvbuf growth and overshot when the
connection RTT is low.

- Preserve skb metadata space across skb_push / skb_pull operations.

- Support for IPIP encapsulation in the nftables flowtable offload.

- Support appending IP interface information to ICMP messages (RFC
5837).

- Support setting max record size in TLS (RFC 8449).

- Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL.

- Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock.

- Let users configure the number of write buffers in SMC.

- Add new struct sockaddr_unsized for sockaddr of unknown length,
from Kees.

- Some conversions away from the crypto_ahash API, from Eric Biggers.

- Some preparations for slimming down struct page.

- YAML Netlink protocol spec for WireGuard.

- Add a tool on top of YAML Netlink specs/lib for reporting commonly
computed derived statistics and summarized system state.

Driver API:

- Add CAN XL support to the CAN Netlink interface.

- Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics, as
defined by the OPEN Alliance's "Advanced diagnostic features for
100BASE-T1 automotive Ethernet PHYs" specification.

- Add DPLL phase-adjust-gran pin attribute (and implement it in
zl3073x).

- Refactor xfrm_input lock to reduce contention when NIC offloads
IPsec and performs RSS.

- Add info to devlink params whether the current setting is the
default or a user override. Allow resetting back to default.

- Add standard device stats for PSP crypto offload.

- Leverage DSA frame broadcast to implement simple HSR frame
duplication for a lot of switches without dedicated HSR offload.

- Add uAPI defines for 1.6Tbps link modes.

Device drivers:

- Add Motorcomm YT921x gigabit Ethernet switch support.

- Add MUCSE driver for N500/N210 1GbE NIC series.

- Convert drivers to support dedicated ops for timestamping control,
and away from the direct IOCTL handling. While at it support GET
operations for PHY timestamping.

- Add (and convert most drivers to) a dedicated ethtool callback for
reading the Rx ring count.

- Significant refactoring efforts in the STMMAC driver, which
supports Synopsys turn-key MAC IP integrated into a ton of SoCs.

- Ethernet high-speed NICs:
- Broadcom (bnxt):
- support PPS in/out on all pins
- Intel (100G, ice, idpf):
- ice: implement standard ethtool and timestamping stats
- i40e: support setting the max number of MAC addresses per VF
- iavf: support RSS of GTP tunnels for 5G and LTE deployments
- nVidia/Mellanox (mlx5):
- reduce downtime on interface reconfiguration
- disable being an XDP redirect target by default (same as
other drivers) to avoid wasting resources if feature is
unused
- Meta (fbnic):
- add support for Linux-managed PCS on 25G, 50G, and 100G links
- Wangxun:
- support Rx descriptor merge, and Tx head writeback
- support Rx coalescing offload
- support 25G SPF and 40G QSFP modules

- Ethernet virtual:
- Google (gve):
- allow ethtool to configure rx_buf_len
- implement XDP HW RX Timestamping support for DQ descriptor
format
- Microsoft vNIC (mana):
- support HW link state events
- handle hardware recovery events when probing the device

- Ethernet NICs consumer, and embedded:
- usbnet: add support for Byte Queue Limits (BQL)
- AMD (amd-xgbe):
- add device selftests
- NXP (enetc):
- add i.MX94 support
- Broadcom integrated MACs (bcmgenet, bcmasp):
- bcmasp: add support for PHY-based Wake-on-LAN
- Broadcom switches (b53):
- support port isolation
- support BCM5389/97/98 and BCM63XX ARL formats
- Lantiq/MaxLinear switches:
- support bridge FDB entries on the CPU port
- use regmap for register access
- allow user to enable/disable learning
- support Energy Efficient Ethernet
- support configuring RMII clock delays
- add tagging driver for MaxLinear GSW1xx switches
- Synopsys (stmmac):
- support using the HW clock in free running mode
- add Eswin EIC7700 support
- add Rockchip RK3506 support
- add Altera Agilex5 support
- Cadence (macb):
- cleanup and consolidate descriptor and DMA address handling
- add EyeQ5 support
- TI:
- icssg-prueth: support AF_XDP
- Airoha access points:
- add missing Ethernet stats and link state callback
- add AN7583 support
- support out-of-order Tx completion processing
- Power over Ethernet:
- pd692x0: preserve PSE configuration across reboots
- add support for TPS23881B devices

- Ethernet PHYs:
- Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support
- Support 50G SerDes and 100G interfaces in Linux-managed PHYs
- micrel:
- support for non PTP SKUs of lan8814
- enable in-band auto-negotiation on lan8814
- realtek:
- cable testing support on RTL8224
- interrupt support on RTL8221B
- motorcomm: support for PHY LEDs on YT853
- microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag
- mscc: support for PHY LED control

- CAN drivers:
- m_can: add support for optional reset and system wake up
- remove can_change_mtu() obsoleted by core handling
- mcp251xfd: support GPIO controller functionality

- Bluetooth:
- add initial support for PASTa

- WiFi:
- split ieee80211.h file, it's way too big
- improvements in VHT radiotap reporting, S1G, Channel Switch
Announcement handling, rate tracking in mesh networks
- improve multi-radio monitor mode support, and add a cfg80211
debugfs interface for it
- HT action frame handling on 6 GHz
- initial chanctx work towards NAN
- MU-MIMO sniffer improvements

- WiFi drivers:
- RealTek (rtw89):
- support USB devices RTL8852AU and RTL8852CU
- initial work for RTL8922DE
- improved injection support
- Intel:
- iwlwifi: new sniffer API support
- MediaTek (mt76):
- WED support for >32-bit DMA
- airoha NPU support
- regdomain improvements
- continued WiFi7/MLO work
- Qualcomm/Atheros:
- ath10k: factory test support
- ath11k: TX power insertion support
- ath12k: BSS color change support
- ath12k: statistics improvements
- brcmfmac: Acer A1 840 tablet quirk
- rtl8xxxu: 40 MHz connection fixes/support"

* tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1381 commits)
net: page_pool: sanitise allocation order
net: page pool: xa init with destroy on pp init
net/mlx5e: Support XDP target xmit with dummy program
net/mlx5e: Update XDP features in switch channels
selftests/tc-testing: Test CAKE scheduler when enqueue drops packets
net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop
wireguard: netlink: generate netlink code
wireguard: uapi: generate header with ynl-gen
wireguard: uapi: move flag enums
wireguard: uapi: move enum wg_cmd
wireguard: netlink: add YNL specification
selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py
selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py
selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py
selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py
selftests: drv-net: introduce Iperf3Runner for measurement use cases
selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS
net: ps3_gelic_net: Use napi_alloc_skb() and napi_gro_receive()
Documentation: net: dsa: mention simple HSR offload helpers
Documentation: net: dsa: mention availability of RedBox
...

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Merge branch 'selftests-hw-net-toeplitz-read-config-from-the-nic-directly'

Jakub Kicinski says:

====================
selftests: hw-net: toeplitz: read config from the NIC directly

First patch here

Merge branch 'selftests-hw-net-toeplitz-read-config-from-the-nic-directly'

Jakub Kicinski says:

====================
selftests: hw-net: toeplitz: read config from the NIC directly

First patch here tries to auto-disable building the iouring sample.
Our CI will still run the iouring test(s), of course, but it looks
like the liburing updates aren't very quick in distroes and having
to hack around it when developing unrelated tests is a bit annoying.

Remaining 4 patches iron out running the Toeplitz hash test against
real NICs. I tested mlx5, bnxt and fbnic, they all pass now.
I switched to using YNL directly in the C code, can't see a reason
to get the info in Python and pass it to C via argv. The old code
likely did this because it predates YNL.
====================

Link: https://patch.msgid.link/20251121040259.3647749-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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selftests: hw-net: toeplitz: read indirection table from the device

Replace the simple modulo math with the real indirection table
read from the device. This makes the tests pass for mlx5 and
bnxt N

selftests: hw-net: toeplitz: read indirection table from the device

Replace the simple modulo math with the real indirection table
read from the device. This makes the tests pass for mlx5 and
bnxt NICs.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20251121040259.3647749-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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selftests: hw-net: toeplitz: read the RSS key directly from C

Now that we have YNL support for RSS accessing the RSS info from
C is very easy. Instead of passing the RSS key from Python do it
direct

selftests: hw-net: toeplitz: read the RSS key directly from C

Now that we have YNL support for RSS accessing the RSS info from
C is very easy. Instead of passing the RSS key from Python do it
directly in the C code.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20251121040259.3647749-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Merge branch 'selftests-drv-net-convert-gro-and-toeplitz-tests-to-work-for-drivers-in-nipa'

Jakub Kicinski says:

====================
selftests: drv-net: convert GRO and Toeplitz tests to work for

Merge branch 'selftests-drv-net-convert-gro-and-toeplitz-tests-to-work-for-drivers-in-nipa'

Jakub Kicinski says:

====================
selftests: drv-net: convert GRO and Toeplitz tests to work for drivers in NIPA

Main objective of this series is to convert the gro.sh and toeplitz.sh
tests to be "NIPA-compatible" - meaning make use of the Python env,
which lets us run the tests against either netdevsim or a real device.

The tests seem to have been written with a different flow in mind.
Namely they source different bash "setup" scripts depending on arguments
passed to the test. While I have nothing against the use of bash and
the overall architecture - the existing code needs quite a bit of work
(don't assume MAC/IP addresses, support remote endpoint over SSH).
If I'm the one fixing it, I'd rather convert them to our "simplistic"
Python.

This series rewrites the tests in Python while addressing their
shortcomings. The functionality of running the test over loopback
on a real device is retained but with a different method of invocation
(see the last patch).

Once again we are dealing with a script which run over a variety of
protocols (combination of [ipv4, ipv6, ipip] x [tcp, udp]). The first
4 patches add support for test variants to our scripts. We use the
term "variant" in the same sense as the C kselftest_harness.h -
variant is just a set of static input arguments.

Note that neither GRO nor the Toeplitz test fully passes for me on
any HW I have access to. But this is unrelated to the conversion.
This series is not making any real functional changes to the tests,
it is limited to improving the "test harness" scripts.
====================

Link: https://patch.msgid.link/20251120021024.2944527-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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selftests: drv-net: hw: convert the Toeplitz test to Python

Rewrite the existing toeplitz.sh test in Python. The conversion
is a lot less exact than the GRO one. We use Netlink APIs to
get the devic

selftests: drv-net: hw: convert the Toeplitz test to Python

Rewrite the existing toeplitz.sh test in Python. The conversion
is a lot less exact than the GRO one. We use Netlink APIs to
get the device RSS and IRQ information. We expect that the device
has neither RPS nor RFS configured, and set RPS up as part of
the test.

Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20251120021024.2944527-11-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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selftests: net: relocate gro and toeplitz tests to drivers/net

The GRO test can run on a real device or a veth.
The Toeplitz hash test can only run on a real device.
Move them from net/ to drivers/n

selftests: net: relocate gro and toeplitz tests to drivers/net

The GRO test can run on a real device or a veth.
The Toeplitz hash test can only run on a real device.
Move them from net/ to drivers/net/ and drivers/net/hw/ respectively.

There are two scripts which set up the environment for these tests
setup_loopback.sh and setup_veth.sh. Move those scripts to net/lib.
The paths to the setup files are a little ugly but they will be
deleted shortly.

toeplitz_client.sh is not a test in itself, but rather a helper
to send traffic, so add it to TEST_FILES rather than TEST_PROGS.

Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20251120021024.2944527-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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