Add a single device mode for netkit instead of netkit pairs. The primary
target for the paired devices is to connect network namespaces, of course,
and support has been implemented in projects like Cilium [0]. For the rxq
leasing the plan is to support two main scenarios related to single device
mode:
* For the use-case of io_uring zero-copy, the control plane can either
set up a netkit pair where the peer device can perform rxq leasing which
is then tied to the lifetime of the peer device, or the control plane
can use a regular netkit pair to connect the hostns to a Pod/container
and dynamically add/remove rxq leasing through a single device without
having to interrupt the device pair. In the case of io_uring, the memory
pool is used as skb non-linear pages, and thus the skb will go its way
through the regular stack into netkit. Things like the netkit policy when
no BPF is attached or skb scrubbing etc apply as-is in case the paired
devices are used, or if the backend memory is tied to the single device
and traffic goes through a paired device.
* For the use-case of AF_XDP, the control plane needs to use netkit in the
single device mode. The single device mode currently enforces only a
pass policy when no BPF is attached, and does not yet support BPF link
attachments for AF_XDP. skbs sent to that device get dropped at the
moment. Given AF_XDP operates at a lower layer of the stack tying this
to the netkit pair did not make sense. In future, the plan is to allow
BPF at the XDP layer which can: i) process traffic coming from the AF_XDP
application (e.g. QEMU with AF_XDP backend) to filter egress traffic or
to push selected egress traffic up to the single netkit device to the
local stack (e.g. DHCP requests), and ii) vice-versa skbs sent to the
single netkit into the AF_XDP application (e.g. DHCP replies). Also,
the control-plane can dynamically manage rxq leasing for the single
netkit device without having to interrupt (e.g. down/up cycle) the main
netkit pair for the Pod which has traffic going in and out.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Co-developed-by: David Wei <dw@davidwei.uk>
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Jordan Rife <jordan@jrife.io>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://docs.cilium.io/en/stable/operations/performance/tuning/#netkit-device-mode [0]
Link: https://patch.msgid.link/20260115082603.219152-10-daniel@iogearbox.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Add a ynl netdev family operation called queue-create that creates a
new queue on a netdevice:
name: queue-create
attribute-set: queue
flags: [admin-perm]
do:
request:
attributes:
- ifindex
- type
- lease
reply: &queue-create-op
attributes:
- id
This is a generic operation such that it can be extended for various
use cases in future. Right now it is mandatory to specify ifindex,
the queue type which is enforced to rx and a lease. The newly created
queue id is returned to the caller.
A queue from a virtual device can have a lease which refers to another
queue from a physical device. This is useful for memory providers
and AF_XDP operations which take an ifindex and queue id to allow
applications to bind against virtual devices in containers. The lease
couples both queues together and allows to proxy the operations from
a virtual device in a container to the physical device.
In future, the nested lease attribute can be lifted and made optional
for other use-cases such as dynamic queue creation for physical
netdevs. The lack of lease and the specification of the physical
device as an ifindex will imply that we need a real queue to be
allocated. Similarly, the queue type enforcement to rx can then be
lifted as well to support tx.
An early implementation had only driver-specific integration [0], but
in order for other virtual devices to reuse, it makes sense to have
this as a generic API in core net.
For leasing queues, the virtual netdev must have real_num_rx_queue
less than num_rx_queues at the time of calling queue-create. The
queue-type must be rx as only rx queues are supported for leasing
for now. We also enforce that the queue-create ifindex must point
to a virtual device, and that the nested lease attribute's ifindex
must point to a physical device. The nested lease attribute set
contains a netns-id attribute which is currently only intended for
dumping as part of the queue-get operation. Also, it is modeled as
an s32 type similarly as done elsewhere in the stack.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Co-developed-by: David Wei <dw@davidwei.uk>
Signed-off-by: David Wei <dw@davidwei.uk>
Link: https://bpfconf.ebpf.io/bpfconf2025/bpfconf2025_material/lsfmmbpf_2025_netkit_borkmann.pdf [0]
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260115082603.219152-2-daniel@iogearbox.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Some UAPI headers use INT_MAX and INT_MIN. Currently they include
<limits.h> for their definitions, which introduces a problematic
dependency on libc.
Add custom, namespaced definitions of INT_MAX and INT_MIN using the
same values as the regular kernel code.
These definitions are not added to uapi/linux/limits.h, as that header
will conflict with libc definitions on some platforms.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://patch.msgid.link/20260113-uapi-limits-v2-1-93c20f4b2c1a@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Document that the 'len' field in ethtool_gstrings and 'n_stats' field in
ethtool_stats optionally serve dual purposes: on entry they specify the
number of items requested, and on return they indicate the number
actually returned (which is not necessarily the same).
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Link: https://patch.msgid.link/20260115060544.481550-1-gal@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Pull media fixes from Mauro Carvalho Chehab:
- ov02c10: some fixes related to preserving bayer pattern and
horizontal control
- ipu-bridge: Add quirks for some Dell XPS laptops with inverted
sensors
- mali-c55: Fix version identifier logic
- rzg2l-cru: csi-2: fix RZ/V2H input sizes on some variants
* tag 'media/v6.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
media: ov02c10: Remove unnecessary hflip and vflip pointers
media: ipu-bridge: Add DMI quirk for Dell XPS laptops with upside down sensors
media: ov02c10: Fix the horizontal flip control
media: ov02c10: Adjust x-win/y-win when changing flipping to preserve bayer-pattern
media: ov02c10: Fix bayer-pattern change after default vflip change
media: rzg2l-cru: csi-2: Support RZ/V2H input sizes
media: uapi: mali-c55-config: Remove version identifier
media: mali-c55: Remove duplicated version check
media: Documentation: mali-c55: Use v4l2-isp version identifier
This commit adds shared shaper state across the cake instances beneath a
cake_mq qdisc. It works by periodically tracking the number of active
instances, and scaling the configured rate by the number of active
queues.
The scan is lockless and simply reads the qlen and the last_active state
variable of each of the instances configured beneath the parent cake_mq
instance. Locking is not required since the values are only updated by
the owning instance, and eventual consistency is sufficient for the
purpose of estimating the number of active queues.
The interval for scanning the number of active queues is set to 200 us.
We found this to be a good tradeoff between overhead and response time.
For a detailed analysis of this aspect see the Netdevconf talk:
https://netdevconf.info/0x19/docs/netdev-0x19-paper16-talk-paper.pdf
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jonas Köppeler <j.koeppeler@tu-berlin.de>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://patch.msgid.link/20260109-mq-cake-sub-qdisc-v8-5-8d613fece5d8@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Johannes Berg says:
====================
First set of changes for the current -next cycle, of note:
- ath12k gets an overhaul to support multi-wiphy device
wiphy and pave the way for future device support in
the same driver (rather than splitting to ath13k)
- mac80211 gets some better iteration macros
* tag 'wireless-next-2026-01-12' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (120 commits)
wifi: mac80211: remove width argument from ieee80211_parse_bitrates
wifi: mac80211_hwsim: remove NAN by default
wifi: mac80211: improve station iteration ergonomics
wifi: mac80211: improve interface iteration ergonomics
wifi: cfg80211: include S1G_NO_PRIMARY flag when sending channel
wifi: mac80211: unexport ieee80211_get_bssid()
wl1251: Replace strncpy with strscpy in wl1251_acx_fw_version
wifi: iwlegacy: 3945-rs: remove redundant pointer check in il3945_rs_tx_status() and il3945_rs_get_rate()
wifi: mac80211: don't send an unused argument to ieee80211_check_combinations
wifi: libertas: fix WARNING in usb_tx_block
wifi: mwifiex: Allocate dev name earlier for interface workqueue name
wifi: wlcore: sdio: Use pm_ptr instead of #ifdef CONFIG_PM
wifi: cfg80211: Fix use_for flag update on BSS refresh
wifi: brcmfmac: rename function that frees vif
wifi: brcmfmac: fix/add kernel-doc comments
wifi: mac80211: Update csa_finalize to use link_id
wifi: cfg80211: add cfg80211_stop_link() for per-link teardown
wifi: ath12k: Skip DP peer creation for scan vdev
wifi: ath12k: move firmware stats request outside of atomic context
wifi: ath12k: add the missing RCU lock in ath12k_dp_tx_free_txbuf()
...
====================
Link: https://patch.msgid.link/20260112185836.378736-3-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In a vain attempt to consolidate the email zoo switch everything to the
kernel.org account.
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull vfs fixes from Christian Brauner:
- Remove incorrect __user annotation from struct xattr_args::value
- Documentation fix: Add missing kernel-doc description for the @isnew
parameter in ilookup5_nowait() to silence Sphinx warnings
- Documentation fix: Fix kernel-doc comment for __start_dirop() - the
function name in the comment was wrong and the @state parameter was
undocumented
- Replace dynamic folio_batch allocation with stack allocation in
iomap_zero_range(). The dynamic allocation was problematic for
ext4-on-iomap work (didn't handle allocation failure properly) and
triggered lockdep complaints. Uses a flag instead to control batch
usage
- Re-add #ifdef guards around PIDFD_GET_<ns-type>_NAMESPACE ioctls.
When a namespace type is disabled, ns->ops is NULL, causes crashes
during inode eviction when closing the fd. The ifdefs were removed in
a recent simplification but are still needed
- Fixe a race where a folio could be unlocked before the trailing zeros
(for EOF within the page) were written
- Split out a dedicated lease_dispose_list() helper since lease code
paths always know they're disposing of leases. Removes unnecessary
runtime flag checks and prepares for upcoming lease_manager
enhancements
- Fix userland delegation requests succeeding despite conflicting
opens. Previously, FL_LAYOUT and FL_DELEG leases bypassed conflict
checks (a hack for nfsd). Adds new ->lm_open_conflict() lease_manager
operation so userland delegations get proper conflict checking while
nfsd can continue its own conflict handling
- Fix LOOKUP_CACHED path lookups incorrectly falling through to the
slow path. After legitimize_links() calls were conditionally elided,
the routine would always fail with LOOKUP_CACHED regardless of
whether there were any links. Now the flag is checked at the two
callsites before calling legitimize_links()
- Fix bug in media fd allocation in media_request_alloc()
- Fix mismatched API calls in ecryptfs_mknod(): was calling
end_removing() instead of end_creating() after
ecryptfs_start_creating_dentry()
- Fix dentry reference count leak in ecryptfs_mkdir(): a dget() of the
lower parent dir was added but never dput()'d, causing BUG during
lower filesystem unmount due to the still-in-use dentry
* tag 'vfs-6.19-rc5.fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
pidfs: protect PIDFD_GET_* ioctls() via ifdef
ecryptfs: Release lower parent dentry after creating dir
ecryptfs: Fix improper mknod pairing of start_creating()/end_removing()
get rid of bogus __user in struct xattr_args::value
VFS: fix __start_dirop() kernel-doc warnings
fs: Describe @isnew parameter in ilookup5_nowait()
fs: make sure to fail try_to_unlazy() and try_to_unlazy() for LOOKUP_CACHED
netfs: Fix early read unlock of page with EOF in middle
filelock: allow lease_managers to dictate what qualifies as a conflict
filelock: add lease_dispose_list() helper
iomap: replace folio_batch allocation with stack allocation
media: mc: fix potential use-after-free in media_request_alloc()
Pull nfsd fixes from Chuck Lever:
"A set of NFSD fixes for stable that arrived after the merge window:
- Remove an invalid NFS status code
- Fix an fstests failure when using pNFS
- Fix a UAF in v4_end_grace()
- Fix the administrative interface used to revoke NFSv4 state
- Fix a memory leak reported by syzbot"
* tag 'nfsd-6.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
NFSD: net ref data still needs to be freed even if net hasn't startup
nfsd: check that server is running in unlock_filesystem
nfsd: use correct loop termination in nfsd4_revoke_states()
nfsd: provide locking for v4_end_grace
NFSD: Fix permission check for read access to executable-only files
NFSD: Remove NFSERR_EAGAIN
The Mali C55 driver uses the v4l2-isp framework, which defines its own
versioning number which does not need to be defined again in each
platform-specific header.
Remove the definition of mali_c55_param_buffer_version enumeration from
the Mali C55 uAPI header.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Pull rdma fixes from Jason Gunthorpe:
- Fix several syzkaller found bugs:
- Poor parsing of the RDMA_NL_LS_OP_IP_RESOLVE netlink
- GID entry refcount leaking when CM destruction races with
multicast establishment
- Missing refcount put in ib_del_sub_device_and_put()
- Fixup recently introduced uABI padding for 32 bit consistency
- Avoid user triggered math overflow in MANA and AFA
- Reading invalid netdev data during an event
- kdoc fixes
- Fix never-working gid copying in ib_get_gids_from_rdma_hdr
- Typo in bnxt when validating the BAR
- bnxt mis-parsed IB_SEND_IP_CSUM so it didn't work always
- bnxt out of bounds access in bnxt related to the counters on new
devices
- Allocate the bnxt PDE table with the right sizing
- Use dma_free_coherent() correctly in bnxt
- Allow rxe to be unloadable when CONFIG_PROVE_LOCKING by adjusting the
tracking of the global sockets it uses
- Missing unlocking on error path in rxe
- Compute the right number of pages in a MR in rtrs
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/bnxt_re: fix dma_free_coherent() pointer
RDMA/rtrs: Fix clt_path::max_pages_per_mr calculation
IB/rxe: Fix missing umem_odp->umem_mutex unlock on error path
RDMA/bnxt_re: Fix to use correct page size for PDE table
RDMA/bnxt_re: Fix OOB write in bnxt_re_copy_err_stats()
RDMA/bnxt_re: Fix IB_SEND_IP_CSUM handling in post_send
RDMA/core: always drop device refcount in ib_del_sub_device_and_put()
RDMA/rxe: let rxe_reclassify_recv_socket() call sk_owner_put()
RDMA/bnxt_re: Fix incorrect BAR check in bnxt_qplib_map_creq_db()
RDMA/core: Fix logic error in ib_get_gids_from_rdma_hdr()
RDMA/efa: Remove possible negative shift
RTRS/rtrs: clean up rtrs headers kernel-doc
RDMA/irdma: avoid invalid read in irdma_net_event
RDMA/mana_ib: check cqe length for kernel CQs
RDMA/irdma: Fix irdma_alloc_ucontext_resp padding
RDMA/ucma: Fix rdma_ucm_query_ib_service_resp struct padding
RDMA/cm: Fix leaking the multicast GID table reference
RDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly
I haven't found an NFSERR_EAGAIN in RFCs 1094, 1813, 7530, or 8881.
None of these RFCs have an NFS status code that match the numeric
value "11".
Based on the meaning of the EAGAIN errno, I presume the use of this
status in NFSD means NFS4ERR_DELAY. So replace the one usage of
nfserr_eagain, and remove it from NFSD's NFS status conversion
tables.
As far as I can tell, NFSERR_EAGAIN has existed since the pre-git
era, but was not actually used by any code until commit f4e44b3933
("NFSD: delay unmount source's export after inter-server copy
completed."), at which time it become possible for NFSD to return
a status code of 11 (which is not valid NFS protocol).
Fixes: f4e44b3933 ("NFSD: delay unmount source's export after inter-server copy completed.")
Cc: stable@vger.kernel.org
Reviewed-by: NeilBrown <neil@brown.name>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The first member of struct xattr_args is declared as
__aligned_u64 __user value;
which makes no sense whatsoever; __user is a qualifier and what that
declaration says is "all struct xattr_args instances have .value
_stored_ in user address space, no matter where the rest of the
structure happens to be".
Something like "int __user *p" stands for "value of p is a pointer
to an instance of int that happens to live in user address space"; it
says nothing about location of p itself, just as const char *p declares a
pointer to unmodifiable char rather than an unmodifiable pointer to char.
With xattr_args the intent clearly had been "the 64bit value
represents a _pointer_ to object in user address space", but __user has
nothing to do with that. All it gets us is a couple of bogus warnings
in fs/xattr.c where (userland) instance of xattr_args is copied to local
variable of that type (in kernel address space), followed by access
to its members. Since we've told sparse that args.value must somehow be
located in userland memory, we get warned that looking at that 64bit
unsigned integer (in a variable already on kernel stack) is not allowed.
Note that sparse has no way to express "this integer shall never
be cast into a pointer to be dereferenced directly" and I don't see any
way to assign a sane semantics to that. In any case, __user is not it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://patch.msgid.link/20251216081939.GQ1712166@ZenIV
Signed-off-by: Christian Brauner <brauner@kernel.org>
Pull input fixes from Dmitry Torokhov:
- a quirk for i8042 to better handle another TUXEDO model
- a quirk to atkbd to handle incorcet behavior of HONOR FMB-P internal
keyboard
- a definition for a new ABS_SND_PROFILE event
- fixes to alps and lkkbd drivers to reliably shut down pending work on
removal
- a fix to apple_z2 driver tightening input report parsing
- a fix for "off-by-one" error when validating config in ti_am335x_tsc
driver
- addition of CRKD Guitars device IDs to xpad driver.
* tag 'input-for-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: ti_am335x_tsc - fix off-by-one error in wire_order validation
Input: xpad - add support for CRKD Guitars
Input: add ABS_SND_PROFILE
Input: apple_z2 - fix reading incorrect reports after exiting sleep
Input: alps - fix use-after-free bugs caused by dev3_register_work
Input: i8042 - add TUXEDO InfinityBook Max Gen10 AMD to i8042 quirk table
Input: atkbd - skip deactivate for HONOR FMB-P's internal keyboard
Input: lkkbd - disable pending work before freeing device
Pull drm fixes from Dave Airlie:
"rc2 fixes for the week, mostly xe, with amdgpu as usual. Then a
smattering of small fixes across the core/tests/panel and amdxdna.
I expect things will be quiet for rc3/4 as teams take a break, and I'm
travelling but will keep an eye on things.
core:
- fix gem handle leak on DRM_IOCTL_GEM_CHANGE_HANDLE
tests:
- add EDEADLK handling
amdgpu:
- Fix no_console_suspend handling
- DCN 3.5.x seamless boot fixes
- DP audio fix
- Fix race in GPU recovery
- SMU 14 OD fix
amdkfd:
- Event fix
xe:
- Limit num_syncs to prevent oversized kernel allocations
- Disallow 0 OA property values
- Disallow 0 EU stall property values
- Fix kobject leak
- Workaround
- Loop variable reference fix
- Fix a CONFIG corner-case incorrect number of argument
- Skip reason prefix while emitting array
- VF migration fix
- Fix context in mei interrupt top half
- Don't include the CCS metadata in the dma-buf sg-table
- VF queueing recovery work fix
- Increase TDF timeout
- GT reset registers vs scheduler ordering fix
- Adjust long-running workload timeslices
- Always set OA_OAGLBCTXCTRL_COUNTER_RESUME
- Fix a return value
- Drop preempt-fences when destroying imported dma-bufs
- Use usleep_range for accurate long-running workload timeslicing
amdxdna:
- don't load virtualized
panel:
- fix visionox-rm69299 Kconfig dependency
- sony-td4353-jdi probing fix"
* tag 'drm-fixes-2025-12-20' of https://gitlab.freedesktop.org/drm/kernel: (34 commits)
drm/xe: Use usleep_range for accurate long-running workload timeslicing
drm/xe: Drop preempt-fences when destroying imported dma-bufs.
drm/xe/eustall: Disallow 0 EU stall property values
drm/xe/oa: Disallow 0 OA property values
drm/xe/xe_sriov_vfio: Fix return value in xe_sriov_vfio_migration_supported()
drm/xe/oa: Always set OAG_OAGLBCTXCTRL_COUNTER_RESUME
drm/xe: Adjust long-running workload timeslices to reasonable values
drm/xe/oa: Limit num_syncs to prevent oversized allocations
drm/xe: Limit num_syncs to prevent oversized allocations
drm/amdkfd: Fix improper NULL termination of queue restore SMI event string
drm/amd/pm: restore SCLK settings after S0ix resume
drm/amdgpu: fix a job->pasid access race in gpu recovery
drm/amd/display: Fix DP no audio issue
drm/amd/display: Fix scratch registers offsets for DCN351
drm/amd/display: Fix scratch registers offsets for DCN35
drm/amd: Resume the device in thaw() callback when console suspend is disabled
drm/panel: visionox-rm69299: Depend on BACKLIGHT_CLASS_DEVICE
accel/amdxdna: Block running under a hypervisor
drm/panel: sony-td4353-jdi: Enable prepare_prev_first
drm/xe: Restore engine registers before restarting schedulers after GT reset
...
Pull block fixes from Jens Axboe:
- ublk selftests for missing coverage
- two fixes for the block integrity code
- fix for the newly added newly added PR read keys ioctl, limiting the
memory that can be allocated
- work around for a deadlock that can occur with ublk, where partition
scanning ends up recursing back into file closure, which needs the
same mutex grabbed. Not the prettiest thing in the world, but an
acceptable work-around until we can eliminate the reliance on
disk->open_mutex for this
- fix for a race between enabling writeback throttling and new IO
submissions
- move a bit of bio flag handling code. No changes, but needed for a
patchset for a future kernel
- fix for an init time id leak failure in rnbd
- loop/zloop state check fix
* tag 'block-6.19-20251218' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
block: validate interval_exp integrity limit
block: validate pi_offset integrity limit
block: rnbd-clt: Fix leaked ID in init_dev()
ublk: fix deadlock when reading partition table
block: add allocation size check in blkdev_pr_read_keys()
Documentation: admin-guide: blockdev: replace zone_capacity with zone_capacity_mb when creating devices
zloop: use READ_ONCE() to read lo->lo_state in queue_rq path
loop: use READ_ONCE() to read lo->lo_state without locking
block: fix race between wbt_enable_default and IO submission
selftests: ublk: add user copy test cases
selftests: ublk: add support for user copy to kublk
selftests: ublk: forbid multiple data copy modes
selftests: ublk: don't share backing files between ublk servers
selftests: ublk: use auto_zc for PER_IO_DAEMON tests in stress_04
selftests: ublk: fix fio arguments in run_io_and_recover()
selftests: ublk: remove unused ios map in seq_io.bt
selftests: ublk: correct last_rw map type in seq_io.bt
selftests: ublk: fix overflow in ublk_queue_auto_zc_fallback()
block: move around bio flagging helpers
Pull networking fixes from Paolo Abeni:
"Including fixes from netfilter and CAN.
Current release - regressions:
- netfilter: nf_conncount: fix leaked ct in error paths
- sched: act_mirred: fix loop detection
- sctp: fix potential deadlock in sctp_clone_sock()
- can: fix build dependency
- eth: mlx5e: do not update BQL of old txqs during channel
reconfiguration
Previous releases - regressions:
- sched: ets: always remove class from active list before deleting it
- inet: frags: flush pending skbs in fqdir_pre_exit()
- netfilter: nf_nat: remove bogus direction check
- mptcp:
- schedule rtx timer only after pushing data
- avoid deadlock on fallback while reinjecting
- can: gs_usb: fix error handling
- eth:
- mlx5e:
- avoid unregistering PSP twice
- fix double unregister of HCA_PORTS component
- bnxt_en: fix XDP_TX path
- mlxsw: fix use-after-free when updating multicast route stats
Previous releases - always broken:
- ethtool: avoid overflowing userspace buffer on stats query
- openvswitch: fix middle attribute validation in push_nsh() action
- eth:
- mlx5: fw_tracer, validate format string parameters
- mlxsw: spectrum_router: fix neighbour use-after-free
- ipvlan: ignore PACKET_LOOPBACK in handle_mode_l2()
Misc:
- Jozsef Kadlecsik retires from maintaining netfilter
- tools: ynl: fix build on systems with old kernel headers"
* tag 'net-6.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (83 commits)
net: hns3: add VLAN id validation before using
net: hns3: using the num_tqps to check whether tqp_index is out of range when vf get ring info from mbx
net: hns3: using the num_tqps in the vf driver to apply for resources
net: enetc: do not transmit redirected XDP frames when the link is down
selftests/tc-testing: Test case exercising potential mirred redirect deadlock
net/sched: act_mirred: fix loop detection
sctp: Clear inet_opt in sctp_v6_copy_ip_options().
sctp: Fetch inet6_sk() after setting ->pinet6 in sctp_clone_sock().
net/handshake: duplicate handshake cancellations leak socket
net/mlx5e: Don't include PSP in the hard MTU calculations
net/mlx5e: Do not update BQL of old txqs during channel reconfiguration
net/mlx5e: Trigger neighbor resolution for unresolved destinations
net/mlx5e: Use ip6_dst_lookup instead of ipv6_dst_lookup_flow for MAC init
net/mlx5: Serialize firmware reset with devlink
net/mlx5: fw_tracer, Handle escaped percent properly
net/mlx5: fw_tracer, Validate format string parameters
net/mlx5: Drain firmware reset in shutdown callback
net/mlx5: fw reset, clear reset requested on drain_fw_reset
net: dsa: mxl-gsw1xx: manually clear RANEG bit
net: dsa: mxl-gsw1xx: fix .shutdown driver operation
...
The exec and vm_bind ioctl allow userspace to specify an arbitrary
num_syncs value. Without bounds checking, a very large num_syncs
can force an excessively large allocation, leading to kernel warnings
from the page allocator as below.
Introduce DRM_XE_MAX_SYNCS (set to 1024) and reject any request
exceeding this limit.
"
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1217 at mm/page_alloc.c:5124 __alloc_frozen_pages_noprof+0x2f8/0x2180 mm/page_alloc.c:5124
...
Call Trace:
<TASK>
alloc_pages_mpol+0xe4/0x330 mm/mempolicy.c:2416
___kmalloc_large_node+0xd8/0x110 mm/slub.c:4317
__kmalloc_large_node_noprof+0x18/0xe0 mm/slub.c:4348
__do_kmalloc_node mm/slub.c:4364 [inline]
__kmalloc_noprof+0x3d4/0x4b0 mm/slub.c:4388
kmalloc_noprof include/linux/slab.h:909 [inline]
kmalloc_array_noprof include/linux/slab.h:948 [inline]
xe_exec_ioctl+0xa47/0x1e70 drivers/gpu/drm/xe/xe_exec.c:158
drm_ioctl_kernel+0x1f1/0x3e0 drivers/gpu/drm/drm_ioctl.c:797
drm_ioctl+0x5e7/0xc50 drivers/gpu/drm/drm_ioctl.c:894
xe_drm_ioctl+0x10b/0x170 drivers/gpu/drm/xe/xe_device.c:224
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:598 [inline]
__se_sys_ioctl fs/ioctl.c:584 [inline]
__x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xbb/0x380 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
...
"
v2: Add "Reported-by" and Cc stable kernels.
v3: Change XE_MAX_SYNCS from 64 to 1024. (Matt & Ashutosh)
v4: s/XE_MAX_SYNCS/DRM_XE_MAX_SYNCS/ (Matt)
v5: Do the check at the top of the exec func. (Matt)
Fixes: dd08ebf6c3 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Reported-by: Koen Koning <koen.koning@intel.com>
Reported-by: Peter Senna Tschudin <peter.senna@linux.intel.com>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6450
Cc: <stable@vger.kernel.org> # v6.12+
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Michal Mrozek <michal.mrozek@intel.com>
Cc: Carl Zhang <carl.zhang@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Ivan Briano <ivan.briano@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251205234715.2476561-5-shuicheng.lin@intel.com
(cherry picked from commit b07bac9bd7)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
A recent commit modified struct irdma_alloc_ucontext_resp by adding a
member with implicit padding in front of it, though this does not change
the offset of the data members other than m68k. Reported by
scripts/check-uapi.sh:
==== ABI differences detected in include/rdma/irdma-abi.h from 1dd7bde2e91c -> HEAD ====
[C] 'struct irdma_alloc_ucontext_resp' changed:
type size changed from 704 to 640 (in bits)
1 data member deletion:
'__u8 rsvd3[2]', at offset 640 (in bits) at irdma-abi.h:61:1
1 data member insertion:
'__u8 revd3[2]', at offset 592 (in bits) at irdma-abi.h:60:1
Change the size back to the previous version, and remove the implicit
padding by making it explicit and matching what x86-64 would do by placing
max_hw_srq_quanta member into a naturally aligned location.
Fixes: 563e1feb5f ("RDMA/irdma: Add SRQ support")
Link: https://patch.msgid.link/r/20251208133849.315451-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Jacob Moroni <jmoroni@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
On a few 32-bit architectures, the newly added ib_user_service_rec
structure is not 64-bit aligned the way it is on most regular ones.
Add explicit padding into the rdma_ucm_query_ib_service_resp and
rdma_ucm_resolve_ib_service structures that embed it, so that the layout
is compatible across all of them.
This is an ABI change on i386, aligning it with x86_64 and the other
64-bit architectures to avoid having to use a compat ioctl handler.
Fixes: 810f874eda ("RDMA/ucma: Support query resolved service records")
Link: https://patch.msgid.link/r/20251208133311.313977-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Pull sound fixes from Takashi Iwai:
"The only slightly large change is the enablement of CIX HD-audio
controller, which took a bit time to be cooked up, while most of other
changes are device-specific small trivial fixes:
- Default disablement of the kconfig for decades old pre-release
alsa-lib PCM API; it's only the default config value change, so it
can't lead to any regressions for the existing setups
- Support for CIX HD-audio controller
- A few ASoC ACP fixes
- Fixes for ASoC cirrus, bcm, wcd, qcom, ak platforms
- Trivial hardening for FireWire and USB-audio
- HD-audio Intel binding fix and quirks"
* tag 'sound-fix-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (30 commits)
ALSA: hda/tas2781: Add new quirk for HP new project
ALSA: hda: cix-ipbloq: Use modern PM ops
ALSA: hda: intel-dsp-config: Prefer legacy driver as fallback
ASoC: amd: acp: update tdm channels for specific DAI
ASoC: cs35l56: Fix incorrect select SND_SOC_CS35L56_CAL_SYSFS_COMMON
ALSA: firewire-motu: add bounds check in put_user loop for DSP events
ASoC: cs35l41: Always return 0 when a subsystem ID is found
ALSA: uapi: Fix typo in asound.h comment
ALSA: Do not build obsolete API
ALSA: hda: add CIX IPBLOQ HDA controller support
ALSA: hda/core: add addr_offset field for bus address translation
ALSA: hda: dt-bindings: add CIX IPBLOQ HDA controller support
ALSA: hda/realtek: Add support for ASUS UM3406GA
ALSA: hda/realtek: Add support for HP Turbine Laptops
ALSA: usb-audio: Initialize status1 to fix uninitialized symbol errors
ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events
ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_hda_read_acpi()
ASoC: cros_ec_codec: Remove unnecessary selection of CRYPTO
ASoc: qcom: q6afe: fix bad guard conversion
ASoC: rockchip: Fix Wvoid-pointer-to-enum-cast warning (again)
...
Pull i2c updates from Wolfram Sang:
- general cleanups in bcm2835, designware, pcf8584, and stm32
- amd-mp2: fix device refcount
- designware: avoid interrupt storms caused by bad firmware
- spacemit: fix device detection failures
- new devices: Intel Diamond Rapids, Rockchip RK3506, Qualcomm
Kaanapali and MSM8953
- minor fixes to i801, core documentation, elektor Kconfig dependencies
- at24 updates: add new compatible for Belling BL24S64
* tag 'i2c-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (21 commits)
i2c: qcom-cci: Add msm8953 compatible
i2c: spacemit: fix detect issue
i2c: amd-mp2: fix reference leak in MP2 PCI device
i2c: i2c.h: fix a bad kernel-doc line
i2c: i2c-elektor: Allow building on SMP kernels
dt-bindings: i2c: qcom-cci: Document Kaanapali compatible
dt-bindings: i2c: qcom-cci: Document msm8953 compatible
dt-bindings: eeprom: at24: Add compatible for Belling BL24S64
i2c: i801: Fix the Intel Diamond Rapids features
i2c: pcf8584: Change pcf_doAdress() to pcf_send_address()
i2c: pcf8584: Make pcf_doAddress() function void
i2c: pcf8584: Move 'ret' variable inside for loop, goto out if ret < 0.
i2c: designware: Disable SMBus interrupts to prevent storms from mis-configured firmware
dt-bindings: i2c: i2c-rk3x: Add compatible string for RK3506
i2c: i801: Add support for Intel Diamond Rapids
i2c: stm32: Omit two variable reassignments in stm32_i2c_dma_request()
i2c: designware: Omit a variable reassignment in dw_i2c_plat_probe()
i2c: pcf8584: Fix do not use assignment inside if conditional
i2c: pcf8584: Remove debug macros from i2c-algo-pcf.c
i2c: busses: bcm2835: convert from round_rate() to determine_rate()
...
Before this patch, the kernel was saving any flags set by the userspace,
even unknown ones. This doesn't cause critical issues because the kernel
is only looking at specific ones. But on the other hand, endpoints dumps
could tell the userspace some recent flags seem to be supported on older
kernel versions.
Instead, ignore all unknown flags when parsing them. By doing that, the
userspace can continue to set unsupported flags, but it has a way to
verify what is supported by the kernel.
Note that it sounds better to continue accepting unsupported flags not
to change the behaviour, but also that eases things on the userspace
side by adding "optional" endpoint types only supported by newer kernel
versions without having to deal with the different kernel versions.
A note for the backports: there will be conflicts in mptcp.h on older
versions not having the mentioned flags, the new line should still be
added last, and the '5' needs to be adapted to have the same value as
the last entry.
Fixes: 01cacb00b3 ("mptcp: add netlink-based PM")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20251205-net-mptcp-misc-fixes-6-19-rc1-v1-1-9e4781a6c1b8@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Pull block updates from Jens Axboe:
"Followup set of fixes and updates for block for the 6.19 merge window.
NVMe had some late minute debates which lead to dropping some patches
from that tree, which is why the initial PR didn't have NVMe included.
It's here now. This pull request contains:
- NVMe pull request via Keith:
- Subsystem usage cleanups (Max)
- Endpoint device fixes (Shin'ichiro)
- Debug statements (Gerd)
- FC fabrics cleanups and fixes (Daniel)
- Consistent alloc API usages (Israel)
- Code comment updates (Chu)
- Authentication retry fix (Justin)
- Fix a memory leak in the discard ioctl code, if the task is being
interrupted by a signal at just the wrong time
- Zoned write plugging fixes
- Add ioctls for for persistent reservations
- Enable per-cpu bio caching by default
- Various little fixes and tweaks"
* tag 'block-6.19-20251208' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (27 commits)
nvme-fabrics: add ENOKEY to no retry criteria for authentication failures
nvme-auth: use kvfree() for memory allocated with kvcalloc()
nvmet-tcp: use kvcalloc for commands array
nvmet-rdma: use kvcalloc for commands and responses arrays
nvme: fix typo error in nvme target
nvmet-fc: use pr_* print macros instead of dev_*
nvmet-fcloop: remove unused lsdir member.
nvmet-fcloop: check all request and response have been processed
nvme-fc: check all request and response have been processed
block: fix memory leak in __blkdev_issue_zero_pages
block: fix comment for op_is_zone_mgmt() to include RESET_ALL
block: Clear BLK_ZONE_WPLUG_PLUGGED when aborting plugged BIOs
blk-mq: Abort suspend when wakeup events are pending
blk-mq: add blk_rq_nr_bvec() helper
block: add IOC_PR_READ_RESERVATION ioctl
block: add IOC_PR_READ_KEYS ioctl
nvme: reject invalid pr_read_keys() num_keys values
scsi: sd: reject invalid pr_read_keys() num_keys values
block: enable per-cpu bio cache by default
block: use bio_alloc_bioset for passthru IO by default
...
Pull hyperv updates from Wei Liu:
- Enhancements to Linux as the root partition for Microsoft Hypervisor:
- Support a new mode called L1VH, which allows Linux to drive the
hypervisor running the Azure Host directly
- Support for MSHV crash dump collection
- Allow Linux's memory management subsystem to better manage guest
memory regions
- Fix issues that prevented a clean shutdown of the whole system on
bare metal and nested configurations
- ARM64 support for the MSHV driver
- Various other bug fixes and cleanups
- Add support for Confidential VMBus for Linux guest on Hyper-V
- Secure AVIC support for Linux guests on Hyper-V
- Add the mshv_vtl driver to allow Linux to run as the secure kernel in
a higher virtual trust level for Hyper-V
* tag 'hyperv-next-signed-20251207' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (58 commits)
mshv: Cleanly shutdown root partition with MSHV
mshv: Use reboot notifier to configure sleep state
mshv: Add definitions for MSHV sleep state configuration
mshv: Add support for movable memory regions
mshv: Add refcount and locking to mem regions
mshv: Fix huge page handling in memory region traversal
mshv: Move region management to mshv_regions.c
mshv: Centralize guest memory region destruction
mshv: Refactor and rename memory region handling functions
mshv: adjust interrupt control structure for ARM64
Drivers: hv: use kmalloc_array() instead of kmalloc()
mshv: Add ioctl for self targeted passthrough hvcalls
Drivers: hv: Introduce mshv_vtl driver
Drivers: hv: Export some symbols for mshv_vtl
static_call: allow using STATIC_CALL_TRAMP_STR() from assembly
mshv: Extend create partition ioctl to support cpu features
mshv: Allow mappings that overlap in uaddr
mshv: Fix create memory region overlap check
mshv: add WQ_PERCPU to alloc_workqueue users
Drivers: hv: Use kmalloc_array() instead of kmalloc()
...
Pull staging driver updates from Greg KH:
"Here is the big set of staging driver updates for 6.19-rc1.
Only thing "major" in here is that two subsystems, gpib and vc04 have
moved out of the staging tree into the "real" portion of the kernel,
which is great to see. Other than that, the rest of the changes are
just tiny coding style cleanups, nothing earth-shattering.
All of these have been in linux-next for a while with no reported
problems"
* tag 'staging-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (53 commits)
staging: rtl8723bs: fix out-of-bounds read in OnBeacon ESR IE parsing
staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing
staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
staging: gpib: Clean-up commented-out code
staging: rtl8723bs: remove custom FIELD_OFFSET macro
staging: rtl8723bs: replace FIELD_OFFSET usage with offsetof in rtw_mlme_ext.c
staging: rtl8723bs: remove dead commented code from odm.c
staging: rtl8723bs: use standard offsetof in cfg80211 operations
staging: rtl8723bs: remove unused registry and BSSID offset macros
staging: rtl8723bs: core: delete commented-out code
staging: rtl8723bs: core: fix block comment style issues
staging: greybus: uart: check return values during probe
staging: fbtft: core: fix potential memory leak in fbtft_probe_common()
staging: gpib: Destage gpib
staging: gpib: Fix SPDX license for gpib headers
staging: gpib: Update TODO file
staging: gpib: Change // comments in uapi header file
platform/raspberrypi: Destage VCHIQ MMAL driver
platform/raspberrypi: Destage VCHIQ interface
staging: vc04_services: Cleanup VCHIQ TODO entries
...
Pull USB/Thunderbolt updates from Greg KH:
"Here is the big set of USB and Thunderbolt driver updates for
6.19-rc1. Nothing major here, just lots of tiny updates for most of
the common USB drivers. Included in here are:
- more xhci driver updates and fixes
- Thunderbolt driver cleanups
- usb serial driver updates
- typec driver updates
- USB tracepoint additions
- dwc3 driver updates, including support for Apple hardware
- lots of other smaller driver updates and cleanups
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (161 commits)
usb: gadget: tegra-xudc: Always reinitialize data toggle when clear halt
USB: serial: option: move Telit 0x10c7 composition in the right place
USB: serial: option: add Telit Cinterion FE910C04 new compositions
usb: typec: ucsi: fix use-after-free caused by uec->work
usb: typec: ucsi: fix probe failure in gaokun_ucsi_probe()
usb: dwc3: core: Remove redundant comment in core init
usb: phy: Initialize struct usb_phy list_head
USB: serial: option: add Foxconn T99W760
usb: usb-storage: No additional quirks need to be added to the EL-R12 optical drive.
usb: typec: hd3ss3220: Enable VBUS based on ID pin state
dt-bindings: usb: ti,hd3ss3220: Add support for VBUS based on ID state
usb: typec: anx7411: add WQ_PERCPU to alloc_workqueue users
USB: add WQ_PERCPU to alloc_workqueue users
dt-bindings: usb: dwc3-xilinx: Describe the reset constraint for the versal platform
drivers/usb/storage: use min() instead of min_t()
usb: raw-gadget: cap raw_io transfer length to KMALLOC_MAX_SIZE
usb: ohci-da8xx: remove unused platform data
usb: gadget: functionfs: use dma_buf_unmap_attachment_unlocked() helper
usb: uas: reduce time under spinlock
usb: dwc3: eic7700: Add EIC7700 USB driver
...
Pull char/misc/IIO driver updates from Greg KH:
"Here is the big set of char/misc/iio driver updates for 6.19-rc1. Lots
of stuff in here including:
- lots of IIO driver updates, cleanups, and additions
- large interconnect driver changes as they get converted over to a
dynamic system of ids
- coresight driver updates
- mwave driver updates
- binder driver updates and changes
- comedi driver fixes now that the fuzzers are being set loose on
them
- nvmem driver updates
- new uio driver addition
- lots of other small char/misc driver updates, full details in the
shortlog
All of these have been in linux-next for a while now"
* tag 'char-misc-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (304 commits)
char: applicom: fix NULL pointer dereference in ac_ioctl
hangcheck-timer: fix coding style spacing
hangcheck-timer: Replace %Ld with %lld
hangcheck-timer: replace printk(KERN_CRIT) with pr_crit
uio: Add SVA support for PCI devices via uio_pci_generic_sva.c
dt-bindings: slimbus: fix warning from example
intel_th: Fix error handling in intel_th_output_open
misc: rp1: Fix an error handling path in rp1_probe()
char: xillybus: add WQ_UNBOUND to alloc_workqueue users
misc: bh1770glc: use pm_runtime_resume_and_get() in power_state_store
misc: cb710: Fix a NULL vs IS_ERR() check in probe()
mux: mmio: Add suspend and resume support
virt: acrn: split acrn_mmio_dev_res out of acrn_mmiodev
greybus: gb-beagleplay: Fix timeout handling in bootloader functions
greybus: add WQ_PERCPU to alloc_workqueue users
char/mwave: drop typedefs
char/mwave: drop printk wrapper
char/mwave: remove printk tracing
char/mwave: remove unneeded fops
char/mwave: remove MWAVE_FUTZ_WITH_OTHER_DEVICES ifdeffery
...
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
...
Pull PCIe Link Encryption and Device Authentication from Dan Williams:
"New PCI infrastructure and one architecture implementation for PCIe
link encryption establishment via platform firmware services.
This work is the result of multiple vendors coming to consensus on
some core infrastructure (thanks Alexey, Yilun, and Aneesh!), and
three vendor implementations, although only one is included in this
pull. The PCI core changes have an ack from Bjorn, the crypto/ccp/
changes have an ack from Tom, and the iommu/amd/ changes have an ack
from Joerg.
PCIe link encryption is made possible by the soup of acronyms
mentioned in the shortlog below. Link Integrity and Data Encryption
(IDE) is a protocol for installing keys in the transmitter and
receiver at each end of a link. That protocol is transported over Data
Object Exchange (DOE) mailboxes using PCI configuration requests.
The aspect that makes this a "platform firmware service" is that the
key provisioning and protocol is coordinated through a Trusted
Execution Envrionment (TEE) Security Manager (TSM). That is either
firmware running in a coprocessor (AMD SEV-TIO), or quasi-hypervisor
software (Intel TDX Connect / ARM CCA) running in a protected CPU
mode.
Now, the only reason to ask a TSM to run this protocol and install the
keys rather than have a Linux driver do the same is so that later, a
confidential VM can ask the TSM directly "can you certify this
device?".
That precludes host Linux from provisioning its own keys, because host
Linux is outside the trust domain for the VM. It also turns out that
all architectures, save for one, do not publish a mechanism for an OS
to establish keys in the root port. So "TSM-established link
encryption" is the only cross-architecture path for this capability
for the foreseeable future.
This unblocks the other arch implementations to follow in v6.20/v7.0,
once they clear some other dependencies, and it unblocks the next
phase of work to implement the end-to-end flow of confidential device
assignment. The PCIe specification calls this end-to-end flow Trusted
Execution Environment (TEE) Device Interface Security Protocol
(TDISP).
In the meantime, Linux gets a link encryption facility which has
practical benefits along the same lines as memory encryption. It
authenticates devices via certificates and may protect against
interposer attacks trying to capture clear-text PCIe traffic.
Summary:
- Introduce the PCI/TSM core for the coordination of device
authentication, link encryption and establishment (IDE), and later
management of the device security operational states (TDISP).
Notify the new TSM core layer of PCI device arrival and departure
- Add a low level TSM driver for the link encryption establishment
capabilities of the AMD SEV-TIO architecture
- Add a library of helpers TSM drivers to use for IDE establishment
and the DOE transport
- Add skeleton support for 'bind' and 'guest_request' operations in
support of TDISP"
* tag 'tsm-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm: (23 commits)
crypto/ccp: Fix CONFIG_PCI=n build
virt: Fix Kconfig warning when selecting TSM without VIRT_DRIVERS
crypto/ccp: Implement SEV-TIO PCIe IDE (phase1)
iommu/amd: Report SEV-TIO support
psp-sev: Assign numbers to all status codes and add new
ccp: Make snp_reclaim_pages and __sev_do_cmd_locked public
PCI/TSM: Add 'dsm' and 'bound' attributes for dependent functions
PCI/TSM: Add pci_tsm_guest_req() for managing TDIs
PCI/TSM: Add pci_tsm_bind() helper for instantiating TDIs
PCI/IDE: Initialize an ID for all IDE streams
PCI/IDE: Add Address Association Register setup for downstream MMIO
resource: Introduce resource_assigned() for discerning active resources
PCI/TSM: Drop stub for pci_tsm_doe_transfer()
drivers/virt: Drop VIRT_DRIVERS build dependency
PCI/TSM: Report active IDE streams
PCI/IDE: Report available IDE streams
PCI/IDE: Add IDE establishment helpers
PCI: Establish document for PCI host bridge sysfs attributes
PCI: Add PCIe Device 3 Extended Capability enumeration
PCI/TSM: Establish Secure Sessions and Link Encryption
...
Pull dma-mapping updates from Marek Szyprowski:
- More DMA mapping API refactoring to physical addresses as the primary
interface instead of page+offset parameters.
This time dma_map_ops callbacks are converted to physical addresses,
what in turn results also in some simplification of architecture
specific code (Leon Romanovsky and Jason Gunthorpe)
- Clarify that dma_map_benchmark is not a kernel self-test, but
standalone tool (Qinxin Xia)
* tag 'dma-mapping-6.19-2025-12-05' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
dma-mapping: remove unused map_page callback
xen: swiotlb: Convert mapping routine to rely on physical address
x86: Use physical address for DMA mapping
sparc: Use physical address DMA mapping
powerpc: Convert to physical address DMA mapping
parisc: Convert DMA map_page to map_phys interface
MIPS/jazzdma: Provide physical address directly
alpha: Convert mapping routine to rely on physical address
dma-mapping: remove unused mapping resource callbacks
xen: swiotlb: Switch to physical address mapping callbacks
ARM: dma-mapping: Switch to physical address mapping callbacks
ARM: dma-mapping: Reduce struct page exposure in arch_sync_dma*()
dma-mapping: convert dummy ops to physical address mapping
dma-mapping: prepare dma_map_ops to conversion to physical address
tools/dma: move dma_map_benchmark from selftests to tools/dma
Pull media kernel-doc fix from Mauro Carvalho Chehab:
"A fix to shut up a kernel-doc warning on c3-isp driver"
* tag 'media/v6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
media: uapi: c3-isp: Fix documentation warning
Pull KVM updates from Paolo Bonzini:
"ARM:
- Support for userspace handling of synchronous external aborts
(SEAs), allowing the VMM to potentially handle the abort in a
non-fatal manner
- Large rework of the VGIC's list register handling with the goal of
supporting more active/pending IRQs than available list registers
in hardware. In addition, the VGIC now supports EOImode==1 style
deactivations for IRQs which may occur on a separate vCPU than the
one that acked the IRQ
- Support for FEAT_XNX (user / privileged execute permissions) and
FEAT_HAF (hardware update to the Access Flag) in the software page
table walkers and shadow MMU
- Allow page table destruction to reschedule, fixing long
need_resched latencies observed when destroying a large VM
- Minor fixes to KVM and selftests
Loongarch:
- Get VM PMU capability from HW GCFG register
- Add AVEC basic support
- Use 64-bit register definition for EIOINTC
- Add KVM timer test cases for tools/selftests
RISC/V:
- SBI message passing (MPXY) support for KVM guest
- Give a new, more specific error subcode for the case when in-kernel
AIA virtualization fails to allocate IMSIC VS-file
- Support KVM_DIRTY_LOG_INITIALLY_SET, enabling dirty log gradually
in small chunks
- Fix guest page fault within HLV* instructions
- Flush VS-stage TLB after VCPU migration for Andes cores
s390:
- Always allocate ESCA (Extended System Control Area), instead of
starting with the basic SCA and converting to ESCA with the
addition of the 65th vCPU. The price is increased number of exits
(and worse performance) on z10 and earlier processor; ESCA was
introduced by z114/z196 in 2010
- VIRT_XFER_TO_GUEST_WORK support
- Operation exception forwarding support
- Cleanups
x86:
- Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO
SPTE caching is disabled, as there can't be any relevant SPTEs to
zap
- Relocate a misplaced export
- Fix an async #PF bug where KVM would clear the completion queue
when the guest transitioned in and out of paging mode, e.g. when
handling an SMI and then returning to paged mode via RSM
- Leave KVM's user-return notifier registered even when disabling
virtualization, as long as kvm.ko is loaded. On reboot/shutdown,
keeping the notifier registered is ok; the kernel does not use the
MSRs and the callback will run cleanly and restore host MSRs if the
CPU manages to return to userspace before the system goes down
- Use the checked version of {get,put}_user()
- Fix a long-lurking bug where KVM's lack of catch-up logic for
periodic APIC timers can result in a hard lockup in the host
- Revert the periodic kvmclock sync logic now that KVM doesn't use a
clocksource that's subject to NTP corrections
- Clean up KVM's handling of MMIO Stale Data and L1TF, and bury the
latter behind CONFIG_CPU_MITIGATIONS
- Context switch XCR0, XSS, and PKRU outside of the entry/exit fast
path; the only reason they were handled in the fast path was to
paper of a bug in the core #MC code, and that has long since been
fixed
- Add emulator support for AVX MOV instructions, to play nice with
emulated devices whose guest drivers like to access PCI BARs with
large multi-byte instructions
x86 (AMD):
- Fix a few missing "VMCB dirty" bugs
- Fix the worst of KVM's lack of EFER.LMSLE emulation
- Add AVIC support for addressing 4k vCPUs in x2AVIC mode
- Fix incorrect handling of selective CR0 writes when checking
intercepts during emulation of L2 instructions
- Fix a currently-benign bug where KVM would clobber SPEC_CTRL[63:32]
on VMRUN and #VMEXIT
- Fix a bug where KVM corrupt the guest code stream when re-injecting
a soft interrupt if the guest patched the underlying code after the
VM-Exit, e.g. when Linux patches code with a temporary INT3
- Add KVM_X86_SNP_POLICY_BITS to advertise supported SNP policy bits
to userspace, and extend KVM "support" to all policy bits that
don't require any actual support from KVM
x86 (Intel):
- Use the root role from kvm_mmu_page to construct EPTPs instead of
the current vCPU state, partly as worthwhile cleanup, but mostly to
pave the way for tracking per-root TLB flushes, and elide EPT
flushes on pCPU migration if the root is clean from a previous
flush
- Add a few missing nested consistency checks
- Rip out support for doing "early" consistency checks via hardware
as the functionality hasn't been used in years and is no longer
useful in general; replace it with an off-by-default module param
to WARN if hardware fails a check that KVM does not perform
- Fix a currently-benign bug where KVM would drop the guest's
SPEC_CTRL[63:32] on VM-Enter
- Misc cleanups
- Overhaul the TDX code to address systemic races where KVM (acting
on behalf of userspace) could inadvertantly trigger lock contention
in the TDX-Module; KVM was either working around these in weird,
ugly ways, or was simply oblivious to them (though even Yan's
devilish selftests could only break individual VMs, not the host
kernel)
- Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a
TDX vCPU, if creating said vCPU failed partway through
- Fix a few sparse warnings (bad annotation, 0 != NULL)
- Use struct_size() to simplify copying TDX capabilities to userspace
- Fix a bug where TDX would effectively corrupt user-return MSR
values if the TDX Module rejects VP.ENTER and thus doesn't clobber
host MSRs as expected
Selftests:
- Fix a math goof in mmu_stress_test when running on a single-CPU
system/VM
- Forcefully override ARCH from x86_64 to x86 to play nice with
specifying ARCH=x86_64 on the command line
- Extend a bunch of nested VMX to validate nested SVM as well
- Add support for LA57 in the core VM_MODE_xxx macro, and add a test
to verify KVM can save/restore nested VMX state when L1 is using
5-level paging, but L2 is not
- Clean up the guest paging code in anticipation of sharing the core
logic for nested EPT and nested NPT
guest_memfd:
- Add NUMA mempolicy support for guest_memfd, and clean up a variety
of rough edges in guest_memfd along the way
- Define a CLASS to automatically handle get+put when grabbing a
guest_memfd from a memslot to make it harder to leak references
- Enhance KVM selftests to make it easer to develop and debug
selftests like those added for guest_memfd NUMA support, e.g. where
test and/or KVM bugs often result in hard-to-debug SIGBUS errors
- Misc cleanups
Generic:
- Use the recently-added WQ_PERCPU when creating the per-CPU
workqueue for irqfd cleanup
- Fix a goof in the dirty ring documentation
- Fix choice of target for directed yield across different calls to
kvm_vcpu_on_spin(); the function was always starting from the first
vCPU instead of continuing the round-robin search"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (260 commits)
KVM: arm64: at: Update AF on software walk only if VM has FEAT_HAFDBS
KVM: arm64: at: Use correct HA bit in TCR_EL2 when regime is EL2
KVM: arm64: Document KVM_PGTABLE_PROT_{UX,PX}
KVM: arm64: Fix spelling mistake "Unexpeced" -> "Unexpected"
KVM: arm64: Add break to default case in kvm_pgtable_stage2_pte_prot()
KVM: arm64: Add endian casting to kvm_swap_s[12]_desc()
KVM: arm64: Fix compilation when CONFIG_ARM64_USE_LSE_ATOMICS=n
KVM: arm64: selftests: Add test for AT emulation
KVM: arm64: nv: Expose hardware access flag management to NV guests
KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW
KVM: arm64: Implement HW access flag management in stage-1 SW PTW
KVM: arm64: Propagate PTW errors up to AT emulation
KVM: arm64: Add helper for swapping guest descriptor
KVM: arm64: nv: Use pgtable definitions in stage-2 walk
KVM: arm64: Handle endianness in read helper for emulated PTW
KVM: arm64: nv: Stop passing vCPU through void ptr in S2 PTW
KVM: arm64: Call helper for reading descriptors directly
KVM: arm64: nv: Advertise support for FEAT_XNX
KVM: arm64: Teach ptdump about FEAT_XNX permissions
KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functions
...
Pull vfs fixes from Christian Brauner:
- Fix a type conversion bug in the ipc subsystem
- Fix per-dentry timeout warning in autofs
- Drop the fd conversion from sockets
- Move assert from iput_not_last() to iput()
- Fix reversed check in filesystems_freeze_callback()
- Use proper uapi types for new struct delegation definitions
* tag 'vfs-6.19-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
vfs: use UAPI types for new struct delegation definition
mqueue: correct the type of ro to int
Revert "net/socket: convert sock_map_fd() to FD_ADD()"
autofs: fix per-dentry timeout warning
fs: assert on I_FREEING not being set in iput() and iput_not_last()
fs: PM: Fix reverse check in filesystems_freeze_callback()
Provide an interface for Virtual Machine Monitor like OpenVMM and its
use as OpenHCL paravisor to control VTL0 (Virtual trust Level).
Expose devices and support IOCTLs for features like VTL creation,
VTL0 memory management, context switch, making hypercalls,
mapping VTL0 address space to VTL2 userspace, getting new VMBus
messages and channel events in VTL2 etc.
Co-developed-by: Roman Kisel <romank@linux.microsoft.com>
Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Co-developed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Pull virtio updates from Michael Tsirkin:
"Just a bunch of fixes and cleanups, mostly very simple. Several
features were merged through net-next this time around"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_pci: drop kernel.h
vhost: switch to arrays of feature bits
vhost/test: add test specific macro for features
virtio: clean up features qword/dword terms
vduse: add WQ_PERCPU to alloc_workqueue users
virtio_balloon: add WQ_PERCPU to alloc_workqueue users
vdpa/pds: use %pe for ERR_PTR() in event handler registration
vhost: Fix kthread worker cgroup failure handling
virtio: vdpa: Fix reference count leak in octep_sriov_enable()
vdpa/mlx5: Fix incorrect error code reporting in query_virtqueues
virtio: fix map ops comment
virtio: fix virtqueue_set_affinity() docs
virtio: standardize Returns documentation style
virtio: fix grammar in virtio_map_ops docs
virtio: fix grammar in virtio_queue_info docs
virtio: fix whitespace in virtio_config_ops
virtio: fix typo in virtio_device_ready() comment
virtio: fix kernel-doc for mapping/free_coherent functions
virtio_vdpa: fix misleading return in void function
Pull iommufd updates from Jason Gunthorpe:
"This is a pretty consequential cycle for iommufd, though this pull is
not too big. It is based on a shared branch with VFIO that introduces
VFIO_DEVICE_FEATURE_DMA_BUF a DMABUF exporter for VFIO device's MMIO
PCI BARs. This was a large multiple series journey over the last year
and a half.
Based on that work IOMMUFD gains support for VFIO DMABUF's in its
existing IOMMU_IOAS_MAP_FILE, which closes the last major gap to
support PCI peer to peer transfers within VMs.
In Joerg's iommu tree we have the "generic page table" work which aims
to consolidate all the duplicated page table code in every iommu
driver into a single algorithm. This will be used by iommufd to
implement unique page table operations to start adding new features
and improve performance.
In here:
- Expand IOMMU_IOAS_MAP_FILE to accept a DMABUF exported from VFIO.
This is the first step to broader DMABUF support in iommufd, right
now it only works with VFIO. This closes the last functional gap
with classic VFIO type 1 to safely support PCI peer to peer DMA by
mapping the VFIO device's MMIO into the IOMMU.
- Relax SMMUv3 restrictions on nesting domains to better support
qemu's sequence to have an identity mapping before the vSID is
established"
* tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd:
iommu/arm-smmu-v3-iommufd: Allow attaching nested domain for GBPA cases
iommufd/selftest: Add some tests for the dmabuf flow
iommufd: Accept a DMABUF through IOMMU_IOAS_MAP_FILE
iommufd: Have iopt_map_file_pages convert the fd to a file
iommufd: Have pfn_reader process DMABUF iopt_pages
iommufd: Allow MMIO pages in a batch
iommufd: Allow a DMABUF to be revoked
iommufd: Do not map/unmap revoked DMABUFs
iommufd: Add DMABUF to iopt_pages
vfio/pci: Add vfio_pci_dma_buf_iommufd_map()
