Pass ctx to backend_deinit().

Pass ctx to backend_deinit().

rebase for freebsd

rebase for freebsd

rebase for freebsd

User provides cpusetsize together with *cpuset_t.

Fix typo.

Replace most of spin locks to standard mtx. Use refcounting in some places

change backend lock, ident set lock, ownerhash lock to standard mtx

remove hwt_libxo.h as not needed

Regenerate

Regenerate

obtain ETM IDR registers from sysctl. This is needed for Juno

Allow attaching to an existed proc;
Add support for libxo

Allow attaching to an existed proc

Add description for CPU mode of operation into hwt.c

Fix context ID allocation, do not allocate twice and check the status of allocation

regenerate

cleanup

Regenerate

Regenerate

regenerate

regenerate

decode multiple cpus at the same time

Regenerate

Fix tracing cpu_id > 0

Add -R (fs_root) flag.

hwt kernel module added

ability to build as a module

Code cleanup. Implement some TODOs

Regenerate

format flag added

Allow tracing multiple cpus in CPU(system) mode

allow tracing multiple cpus in system mode

allow tracing multiple cpus in system mode

Remove cheribsd-specific "size" member from hwt_record as not needed

Kernel-mode tracing support added.

Kernel-mode tracing support added.

Add kernel-mode tracing support.

Initial work on cpu/system mode of operation

hwt_backend interface changed

usage() added

Abstract tracing devices

regenerate

regenerate

suspend specific thread on mmap, not entire proc

suspend a single thread on mmap, not entire proc

ip range filtering (draft) added

coresight_setup() method added

ip range filtering added

Regenerate

In D40466#921159, @andrew wrote:

This looks like a kernel with HWT_HOOKS but not HWT wouldn't link as, for example, hwt_switch_in will be missing. HWPMC handles this by adding a function pointer and protects it with an epoch.

I added this functionality. I am not sure if epoch is needed. PMC have several macroses for hook invocation, only some of them require epoch.

Make coresight optional. Depends on hwt

Move changes related to coresight to another review

Move hwt files to conf/files.

Add '-t' argument allowing to specify thread index we want to read trace for.

Add short overview and context lifecycle.

Add hwt_hook variable and HWT_CALL_HOOK macro

Add hwt_hook variable and HWT_CALL_HOOK macro

Remove mtx_threads and mtx_records. Use mtx of entire context

Split out ownerhash/contexthash code to a separate files.

Split out ioctl code to a separate file.

Return ctx locked in hwt_ctx_lookup_contexthash().

Regenerate

Split out thread/backend/owner/context code to separate files.

morello-dts included for test

Move user-visible headers to sys

Interface to HWT changed

Multi-thread tracing works

o Fix M_HWT declaration
o Remove mtx lock around backend ops as not needed
o Change mtx_records lock type to default

clean up

Rename hwt_event_*() to hwt_backend_*()

Split out ioc_alloc func

remove cpu_id field from ioctl interface

trace buffers per each thread implemented

Add hwt_priv_check() to ensure a user has permissions to trace target process

Provide the name of backend needed for registration in HWT framework.

o Allow registration of multiple CPU trace backends. Could be useful on ARM64 to have both Coresight and SPE. One per each context, so multiple backends could be used simultaneously.
o Remove hwt_softc as there is no plan to use multiple instances of HWT.

Fix comment.

Wrap long lines.

Include changes to sys/proc.h

Add CORESIGHT_DEBUG macro.

o Remove remove unneeded headers, cdef.h and FBSDID

o Allow user to pass trace buffer size he wants per each HWT context
o Remove 'All rights reserved'
o Expand HWT acronym in conf/options

remove debug printfs