Jesper Dangaard Brouer c8996c98f7 bpf: Add BPF-helper for accessing CLOCK_TAI ... Commit 3dc6ffae2d ("timekeeping: Introduce fast accessor to clock tai") introduced a fast and NMI-safe accessor for CLOCK_TAI. Especially in time sensitive networks (TSN), where all nodes are synchronized by Precision Time Protocol (PTP), it's helpful to have the possibility to generate timestamps based on CLOCK_TAI instead of CLOCK_MONOTONIC. With a BPF helper for TAI in place, it becomes very convenient to correlate activity across different machines in the network. Use cases for such a BPF helper include functionalities such as Tx launch time (e.g. ETF and TAPRIO Qdiscs) and timestamping. Note: CLOCK_TAI is nothing new per se, only the NMI-safe variant of it is. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> [Kurt: Wrote changelog and renamed helper] Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> Link: https://lore.kernel.org/r/20220809060803.5773-2-kurt@linutronix.de Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2022-08-09 09:47:13 -07:00
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acpi	Merge branches 'acpi-processor', 'acpi-apei' and 'acpi-ec'	2022-07-29 20:08:25 +02:00
asm-generic	Random number generator updates for Linux 6.0-rc1.	2022-08-02 17:31:35 -07:00
clocksource	- Add the missing DT bindings for the MTU nomadik timer (Linus	2022-07-28 12:33:34 +02:00
crypto
drm
dt-bindings	ARM: new SoC support for 6.0	2022-08-02 08:29:18 -07:00
keys
kunit
kvm
linux	bpf: Add BPF-helper for accessing CLOCK_TAI	2022-08-09 09:47:13 -07:00
math-emu
media
memory
misc
net	net: netfilter: Remove ifdefs for code shared by BPF and ctnetlink	2022-08-09 09:41:54 -07:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace	Networking changes for 6.0.	2022-08-03 16:29:08 -07:00
uapi	bpf: Add BPF-helper for accessing CLOCK_TAI	2022-08-09 09:47:13 -07:00
ufs
vdso
video
xen