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
..
bpf	bpf: Add BPF-helper for accessing CLOCK_TAI	2022-08-09 09:47:13 -07:00
cgroup	cgroup: enable cgroup_get_from_file() on cgroup1	2022-08-09 09:11:41 -07:00
configs	x86/configs: Update configs in x86_debug.config	2022-07-27 18:09:11 +02:00
debug	Modules updates for v5.19-rc1	2022-05-26 17:13:43 -07:00
dma	dma-direct: use the correct size for dma_set_encrypted()	2022-06-23 15:26:59 +02:00
entry	context_tracking: Take NMI eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
events	Networking changes for 6.0.	2022-08-03 16:29:08 -07:00
futex	drm for 5.19-rc1	2022-05-25 16:18:27 -07:00
gcov
irq	irqchip/genirq updates for 5.20:	2022-07-28 12:36:35 +02:00
kcsan	kcsan: test: Add a .kunitconfig to run KCSAN tests	2022-07-22 09:22:59 -06:00
livepatch	Livepatching changes for 5.19	2022-06-02 08:55:01 -07:00
locking	RCU pull request for v5.20 (or whatever)	2022-08-02 19:12:45 -07:00
module	linux-kselftest-kunit-5.20-rc1	2022-08-02 19:34:45 -07:00
power	for-5.20/block-2022-07-29	2022-08-02 13:46:35 -07:00
printk	printk: do not wait for consoles when suspended	2022-07-15 10:52:11 +02:00
rcu	RCU pull request for v5.20 (or whatever)	2022-08-02 19:12:45 -07:00
sched	Several core optimizations:	2022-08-03 09:45:08 -07:00
time	Networking changes for 6.0.	2022-08-03 16:29:08 -07:00
trace	Networking changes for 6.0.	2022-08-03 16:29:08 -07:00
.gitignore
acct.c
async.c
audit.c	audit: make is_audit_feature_set() static	2022-06-13 14:08:57 -04:00
audit.h
audit_fsnotify.c	fsnotify: make allow_dups a property of the group	2022-04-25 14:37:18 +02:00
audit_tree.c	audit: use fsnotify group lock helpers	2022-04-25 14:37:28 +02:00
audit_watch.c
auditfilter.c
auditsc.c	audit: free module name	2022-06-15 19:28:44 -04:00
backtracetest.c
bounds.c
capability.c
cfi.c	context_tracking: Take IRQ eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
compat.c
configs.c
context_tracking.c	MAINTAINERS: Add Paul as context tracking maintainer	2022-07-05 13:33:00 -07:00
cpu.c	Intel Trust Domain Extensions	2022-05-23 17:51:12 -07:00
cpu_pm.c	context_tracking: Take IRQ eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
crash_core.c	Not a lot of material this cycle. Many singleton patches against various	2022-05-27 11:22:03 -07:00
crash_dump.c
cred.c
delayacct.c	delayacct: track delays from write-protect copy	2022-06-01 15:55:25 -07:00
dma.c
exec_domain.c
exit.c	fix race between exit_itimers() and /proc/pid/timers	2022-07-11 09:52:59 -07:00
extable.c	context_tracking: Take NMI eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
fail_function.c
fork.c	RCU pull request for v5.20 (or whatever)	2022-08-02 19:12:45 -07:00
freezer.c
gen_kheaders.sh	kheaders: Have cpio unconditionally replace files	2022-05-08 03:16:59 +09:00
groups.c	security: Add LSM hook to setgroups() syscall	2022-07-15 18:21:49 +00:00
hung_task.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
iomem.c
irq_work.c
jump_label.c	jump_label: make initial NOP patching the special case	2022-06-24 09:48:55 +02:00
kallsyms.c	bpf: add a ksym BPF iterator	2022-07-12 15:27:19 -07:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: update pos before writing pc in trace function	2022-05-25 13:05:42 -07:00
kexec.c
kexec_core.c	kexec: drop weak attribute from functions	2022-07-15 12:21:16 -04:00
kexec_elf.c
kexec_file.c	kexec, KEYS: make the code in bzImage64_verify_sig generic	2022-07-15 12:21:16 -04:00
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	tracing updates for 5.19:	2022-05-29 10:31:36 -07:00
ksysfs.c
kthread.c	kthread: make it clear that kthread_create_on_node() might be terminated by any fatal signal	2022-06-16 19:11:30 -07:00
latencytop.c
Makefile	kernel: add platform_has() infrastructure	2022-06-06 08:06:00 +02:00
module_signature.c
notifier.c	notifier: Add blocking/atomic_notifier_chain_register_unique_prio()	2022-05-19 19:30:30 +02:00
nsproxy.c	fs/exec: allow to unshare a time namespace on vfork+exec	2022-06-15 07:58:04 -07:00
padata.c
panic.c	linux-kselftest-kunit-5.20-rc1	2022-08-02 19:34:45 -07:00
params.c
pid.c
pid_namespace.c	kernel: pid_namespace: use NULL instead of using plain integer as pointer	2022-04-29 14:38:00 -07:00
platform-feature.c	kernel: add platform_has() infrastructure	2022-06-06 08:06:00 +02:00
profile.c
ptrace.c	ptrace: fix clearing of JOBCTL_TRACED in ptrace_unfreeze_traced()	2022-07-09 11:06:19 -07:00
range.c
reboot.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
regset.c
relay.c	relay: remove redundant assignment to pointer buf	2022-05-12 20:38:37 -07:00
resource.c
resource_kunit.c
rseq.c	rseq: Kill process when unknown flags are encountered in ABI structures	2022-08-01 15:21:42 +02:00
scftorture.c
scs.c
seccomp.c	seccomp: Add wait_killable semantic to seccomp user notifier	2022-05-03 14:11:58 -07:00
signal.c	signal handling: don't use BUG_ON() for debugging	2022-07-07 09:53:43 -07:00
smp.c	locking/csd_lock: Change csdlock_debug from early_param to __setup	2022-07-19 11:40:00 -07:00
smpboot.c
smpboot.h
softirq.c	context_tracking: Take IRQ eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
stackleak.c	stackleak: add on/off stack variants	2022-05-08 01:33:09 -07:00
stacktrace.c
static_call.c
static_call_inline.c
stop_machine.c	Scheduler changes in this cycle were:	2022-05-24 11:11:13 -07:00
sys.c
sys_ni.c
sysctl-test.c
sysctl.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-07-21 13:03:39 -07:00
task_work.c	task_work: allow TWA_SIGNAL without a rescheduling IPI	2022-04-30 08:39:32 -06:00
taskstats.c	kernel: make taskstats available from all net namespaces	2022-04-29 14:38:03 -07:00
torture.c
tracepoint.c
tsacct.c	taskstats: version 12 with thread group and exe info	2022-04-29 14:38:03 -07:00
ucount.c
uid16.c
uid16.h
umh.c	kthread: Don't allocate kthread_struct for init and umh	2022-05-06 14:49:44 -05:00
up.c
user-return-notifier.c
user.c
user_namespace.c
usermode_driver.c	blob_to_mnt(): kern_unmount() is needed to undo kern_mount()	2022-05-19 23:25:47 -04:00
utsname.c
utsname_sysctl.c
watch_queue.c	This was a moderately busy cycle for documentation, but nothing all that	2022-08-02 19:24:24 -07:00
watchdog.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
watchdog_hld.c	Revert "printk: add functions to prefer direct printing"	2022-06-23 18:41:40 +02:00
workqueue.c	workqueue: Avoid a false warning in unbind_workers()	2022-07-29 07:49:02 -10:00
workqueue_internal.h