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lastdragon
2026-09-06 12:53:21 -06:00
parent 662efe3c2a
commit ad2088d178
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linux-7.2.3/tools/perf/arch/arm/Build
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perf-util-y += util/
perf-test-$(CONFIG_DWARF_UNWIND) += tests/
linux-7.2.3/tools/perf/arch/arm/Makefile
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# SPDX-License-Identifier: GPL-2.0-only
PERF_HAVE_JITDUMP := 1
linux-7.2.3/tools/perf/arch/arm/entry/syscalls/syscall.tbl
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# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
#
# Linux system call numbers and entry vectors
#
# The format is:
# <num> <abi> <name> [<entry point> [<oabi compat entry point>]]
#
# Where abi is:
# common - for system calls shared between oabi and eabi (may have compat)
# oabi - for oabi-only system calls (may have compat)
# eabi - for eabi-only system calls
#
# For each syscall number, "common" is mutually exclusive with oabi and eabi
#
0 common restart_syscall sys_restart_syscall
1 common exit sys_exit
2 common fork sys_fork
3 common read sys_read
4 common write sys_write
5 common open sys_open
6 common close sys_close
# 7 was sys_waitpid
8 common creat sys_creat
9 common link sys_link
10 common unlink sys_unlink
11 common execve sys_execve
12 common chdir sys_chdir
13 oabi time sys_time32
14 common mknod sys_mknod
15 common chmod sys_chmod
16 common lchown sys_lchown16
# 17 was sys_break
# 18 was sys_stat
19 common lseek sys_lseek
20 common getpid sys_getpid
21 common mount sys_mount
22 oabi umount sys_oldumount
23 common setuid sys_setuid16
24 common getuid sys_getuid16
25 oabi stime sys_stime32
26 common ptrace sys_ptrace
27 oabi alarm sys_alarm
# 28 was sys_fstat
29 common pause sys_pause
30 oabi utime sys_utime32
# 31 was sys_stty
# 32 was sys_gtty
33 common access sys_access
34 common nice sys_nice
# 35 was sys_ftime
36 common sync sys_sync
37 common kill sys_kill
38 common rename sys_rename
39 common mkdir sys_mkdir
40 common rmdir sys_rmdir
41 common dup sys_dup
42 common pipe sys_pipe
43 common times sys_times
# 44 was sys_prof
45 common brk sys_brk
46 common setgid sys_setgid16
47 common getgid sys_getgid16
# 48 was sys_signal
49 common geteuid sys_geteuid16
50 common getegid sys_getegid16
51 common acct sys_acct
52 common umount2 sys_umount
# 53 was sys_lock
54 common ioctl sys_ioctl
55 common fcntl sys_fcntl
# 56 was sys_mpx
57 common setpgid sys_setpgid
# 58 was sys_ulimit
# 59 was sys_olduname
60 common umask sys_umask
61 common chroot sys_chroot
62 common ustat sys_ustat
63 common dup2 sys_dup2
64 common getppid sys_getppid
65 common getpgrp sys_getpgrp
66 common setsid sys_setsid
67 common sigaction sys_sigaction
# 68 was sys_sgetmask
# 69 was sys_ssetmask
70 common setreuid sys_setreuid16
71 common setregid sys_setregid16
72 common sigsuspend sys_sigsuspend
73 common sigpending sys_sigpending
74 common sethostname sys_sethostname
75 common setrlimit sys_setrlimit
# Back compat 2GB limited rlimit
76 oabi getrlimit sys_old_getrlimit
77 common getrusage sys_getrusage
78 common gettimeofday sys_gettimeofday
79 common settimeofday sys_settimeofday
80 common getgroups sys_getgroups16
81 common setgroups sys_setgroups16
82 oabi select sys_old_select
83 common symlink sys_symlink
# 84 was sys_lstat
85 common readlink sys_readlink
86 common uselib sys_uselib
87 common swapon sys_swapon
88 common reboot sys_reboot
89 oabi readdir sys_old_readdir
90 oabi mmap sys_old_mmap
91 common munmap sys_munmap
92 common truncate sys_truncate
93 common ftruncate sys_ftruncate
94 common fchmod sys_fchmod
95 common fchown sys_fchown16
96 common getpriority sys_getpriority
97 common setpriority sys_setpriority
# 98 was sys_profil
99 common statfs sys_statfs
100 common fstatfs sys_fstatfs
# 101 was sys_ioperm
102 oabi socketcall sys_socketcall sys_oabi_socketcall
103 common syslog sys_syslog
104 common setitimer sys_setitimer
105 common getitimer sys_getitimer
106 common stat sys_newstat
107 common lstat sys_newlstat
108 common fstat sys_newfstat
# 109 was sys_uname
# 110 was sys_iopl
111 common vhangup sys_vhangup
# 112 was sys_idle
# syscall to call a syscall!
113 oabi syscall sys_syscall
114 common wait4 sys_wait4
115 common swapoff sys_swapoff
116 common sysinfo sys_sysinfo
117 oabi ipc sys_ipc sys_oabi_ipc
118 common fsync sys_fsync
119 common sigreturn sys_sigreturn_wrapper
120 common clone sys_clone
121 common setdomainname sys_setdomainname
122 common uname sys_newuname
# 123 was sys_modify_ldt
124 common adjtimex sys_adjtimex_time32
125 common mprotect sys_mprotect
126 common sigprocmask sys_sigprocmask
# 127 was sys_create_module
128 common init_module sys_init_module
129 common delete_module sys_delete_module
# 130 was sys_get_kernel_syms
131 common quotactl sys_quotactl
132 common getpgid sys_getpgid
133 common fchdir sys_fchdir
134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs
136 common personality sys_personality
# 137 was sys_afs_syscall
138 common setfsuid sys_setfsuid16
139 common setfsgid sys_setfsgid16
140 common _llseek sys_llseek
141 common getdents sys_getdents
142 common _newselect sys_select
143 common flock sys_flock
144 common msync sys_msync
145 common readv sys_readv
146 common writev sys_writev
147 common getsid sys_getsid
148 common fdatasync sys_fdatasync
149 common _sysctl sys_ni_syscall
150 common mlock sys_mlock
151 common munlock sys_munlock
152 common mlockall sys_mlockall
153 common munlockall sys_munlockall
154 common sched_setparam sys_sched_setparam
155 common sched_getparam sys_sched_getparam
156 common sched_setscheduler sys_sched_setscheduler
157 common sched_getscheduler sys_sched_getscheduler
158 common sched_yield sys_sched_yield
159 common sched_get_priority_max sys_sched_get_priority_max
160 common sched_get_priority_min sys_sched_get_priority_min
161 common sched_rr_get_interval sys_sched_rr_get_interval_time32
162 common nanosleep sys_nanosleep_time32
163 common mremap sys_mremap
164 common setresuid sys_setresuid16
165 common getresuid sys_getresuid16
# 166 was sys_vm86
# 167 was sys_query_module
168 common poll sys_poll
169 common nfsservctl
170 common setresgid sys_setresgid16
171 common getresgid sys_getresgid16
172 common prctl sys_prctl
173 common rt_sigreturn sys_rt_sigreturn_wrapper
174 common rt_sigaction sys_rt_sigaction
175 common rt_sigprocmask sys_rt_sigprocmask
176 common rt_sigpending sys_rt_sigpending
177 common rt_sigtimedwait sys_rt_sigtimedwait_time32
178 common rt_sigqueueinfo sys_rt_sigqueueinfo
179 common rt_sigsuspend sys_rt_sigsuspend
180 common pread64 sys_pread64 sys_oabi_pread64
181 common pwrite64 sys_pwrite64 sys_oabi_pwrite64
182 common chown sys_chown16
183 common getcwd sys_getcwd
184 common capget sys_capget
185 common capset sys_capset
186 common sigaltstack sys_sigaltstack
187 common sendfile sys_sendfile
# 188 reserved
# 189 reserved
190 common vfork sys_vfork
# SuS compliant getrlimit
191 common ugetrlimit sys_getrlimit
192 common mmap2 sys_mmap2
193 common truncate64 sys_truncate64 sys_oabi_truncate64
194 common ftruncate64 sys_ftruncate64 sys_oabi_ftruncate64
195 common stat64 sys_stat64 sys_oabi_stat64
196 common lstat64 sys_lstat64 sys_oabi_lstat64
197 common fstat64 sys_fstat64 sys_oabi_fstat64
198 common lchown32 sys_lchown
199 common getuid32 sys_getuid
200 common getgid32 sys_getgid
201 common geteuid32 sys_geteuid
202 common getegid32 sys_getegid
203 common setreuid32 sys_setreuid
204 common setregid32 sys_setregid
205 common getgroups32 sys_getgroups
206 common setgroups32 sys_setgroups
207 common fchown32 sys_fchown
208 common setresuid32 sys_setresuid
209 common getresuid32 sys_getresuid
210 common setresgid32 sys_setresgid
211 common getresgid32 sys_getresgid
212 common chown32 sys_chown
213 common setuid32 sys_setuid
214 common setgid32 sys_setgid
215 common setfsuid32 sys_setfsuid
216 common setfsgid32 sys_setfsgid
217 common getdents64 sys_getdents64
218 common pivot_root sys_pivot_root
219 common mincore sys_mincore
220 common madvise sys_madvise
221 common fcntl64 sys_fcntl64 sys_oabi_fcntl64
# 222 for tux
# 223 is unused
224 common gettid sys_gettid
225 common readahead sys_readahead sys_oabi_readahead
226 common setxattr sys_setxattr
227 common lsetxattr sys_lsetxattr
228 common fsetxattr sys_fsetxattr
229 common getxattr sys_getxattr
230 common lgetxattr sys_lgetxattr
231 common fgetxattr sys_fgetxattr
232 common listxattr sys_listxattr
233 common llistxattr sys_llistxattr
234 common flistxattr sys_flistxattr
235 common removexattr sys_removexattr
236 common lremovexattr sys_lremovexattr
237 common fremovexattr sys_fremovexattr
238 common tkill sys_tkill
239 common sendfile64 sys_sendfile64
240 common futex sys_futex_time32
241 common sched_setaffinity sys_sched_setaffinity
242 common sched_getaffinity sys_sched_getaffinity
243 common io_setup sys_io_setup
244 common io_destroy sys_io_destroy
245 common io_getevents sys_io_getevents_time32
246 common io_submit sys_io_submit
247 common io_cancel sys_io_cancel
248 common exit_group sys_exit_group
249 common lookup_dcookie sys_ni_syscall
250 common epoll_create sys_epoll_create
251 common epoll_ctl sys_epoll_ctl sys_oabi_epoll_ctl
252 common epoll_wait sys_epoll_wait
253 common remap_file_pages sys_remap_file_pages
# 254 for set_thread_area
# 255 for get_thread_area
256 common set_tid_address sys_set_tid_address
257 common timer_create sys_timer_create
258 common timer_settime sys_timer_settime32
259 common timer_gettime sys_timer_gettime32
260 common timer_getoverrun sys_timer_getoverrun
261 common timer_delete sys_timer_delete
262 common clock_settime sys_clock_settime32
263 common clock_gettime sys_clock_gettime32
264 common clock_getres sys_clock_getres_time32
265 common clock_nanosleep sys_clock_nanosleep_time32
266 common statfs64 sys_statfs64_wrapper
267 common fstatfs64 sys_fstatfs64_wrapper
268 common tgkill sys_tgkill
269 common utimes sys_utimes_time32
270 common arm_fadvise64_64 sys_arm_fadvise64_64
271 common pciconfig_iobase sys_pciconfig_iobase
272 common pciconfig_read sys_pciconfig_read
273 common pciconfig_write sys_pciconfig_write
274 common mq_open sys_mq_open
275 common mq_unlink sys_mq_unlink
276 common mq_timedsend sys_mq_timedsend_time32
277 common mq_timedreceive sys_mq_timedreceive_time32
278 common mq_notify sys_mq_notify
279 common mq_getsetattr sys_mq_getsetattr
280 common waitid sys_waitid
281 common socket sys_socket
282 common bind sys_bind sys_oabi_bind
283 common connect sys_connect sys_oabi_connect
284 common listen sys_listen
285 common accept sys_accept
286 common getsockname sys_getsockname
287 common getpeername sys_getpeername
288 common socketpair sys_socketpair
289 common send sys_send
290 common sendto sys_sendto sys_oabi_sendto
291 common recv sys_recv
292 common recvfrom sys_recvfrom
293 common shutdown sys_shutdown
294 common setsockopt sys_setsockopt
295 common getsockopt sys_getsockopt
296 common sendmsg sys_sendmsg sys_oabi_sendmsg
297 common recvmsg sys_recvmsg
298 common semop sys_semop sys_oabi_semop
299 common semget sys_semget
300 common semctl sys_old_semctl
301 common msgsnd sys_msgsnd
302 common msgrcv sys_msgrcv
303 common msgget sys_msgget
304 common msgctl sys_old_msgctl
305 common shmat sys_shmat
306 common shmdt sys_shmdt
307 common shmget sys_shmget
308 common shmctl sys_old_shmctl
309 common add_key sys_add_key
310 common request_key sys_request_key
311 common keyctl sys_keyctl
312 common semtimedop sys_semtimedop_time32 sys_oabi_semtimedop
313 common vserver
314 common ioprio_set sys_ioprio_set
315 common ioprio_get sys_ioprio_get
316 common inotify_init sys_inotify_init
317 common inotify_add_watch sys_inotify_add_watch
318 common inotify_rm_watch sys_inotify_rm_watch
319 common mbind sys_mbind
320 common get_mempolicy sys_get_mempolicy
321 common set_mempolicy sys_set_mempolicy
322 common openat sys_openat
323 common mkdirat sys_mkdirat
324 common mknodat sys_mknodat
325 common fchownat sys_fchownat
326 common futimesat sys_futimesat_time32
327 common fstatat64 sys_fstatat64 sys_oabi_fstatat64
328 common unlinkat sys_unlinkat
329 common renameat sys_renameat
330 common linkat sys_linkat
331 common symlinkat sys_symlinkat
332 common readlinkat sys_readlinkat
333 common fchmodat sys_fchmodat
334 common faccessat sys_faccessat
335 common pselect6 sys_pselect6_time32
336 common ppoll sys_ppoll_time32
337 common unshare sys_unshare
338 common set_robust_list sys_set_robust_list
339 common get_robust_list sys_get_robust_list
340 common splice sys_splice
341 common arm_sync_file_range sys_sync_file_range2
342 common tee sys_tee
343 common vmsplice sys_vmsplice
344 common move_pages sys_move_pages
345 common getcpu sys_getcpu
346 common epoll_pwait sys_epoll_pwait
347 common kexec_load sys_kexec_load
348 common utimensat sys_utimensat_time32
349 common signalfd sys_signalfd
350 common timerfd_create sys_timerfd_create
351 common eventfd sys_eventfd
352 common fallocate sys_fallocate
353 common timerfd_settime sys_timerfd_settime32
354 common timerfd_gettime sys_timerfd_gettime32
355 common signalfd4 sys_signalfd4
356 common eventfd2 sys_eventfd2
357 common epoll_create1 sys_epoll_create1
358 common dup3 sys_dup3
359 common pipe2 sys_pipe2
360 common inotify_init1 sys_inotify_init1
361 common preadv sys_preadv
362 common pwritev sys_pwritev
363 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo
364 common perf_event_open sys_perf_event_open
365 common recvmmsg sys_recvmmsg_time32
366 common accept4 sys_accept4
367 common fanotify_init sys_fanotify_init
368 common fanotify_mark sys_fanotify_mark
369 common prlimit64 sys_prlimit64
370 common name_to_handle_at sys_name_to_handle_at
371 common open_by_handle_at sys_open_by_handle_at
372 common clock_adjtime sys_clock_adjtime32
373 common syncfs sys_syncfs
374 common sendmmsg sys_sendmmsg
375 common setns sys_setns
376 common process_vm_readv sys_process_vm_readv
377 common process_vm_writev sys_process_vm_writev
378 common kcmp sys_kcmp
379 common finit_module sys_finit_module
380 common sched_setattr sys_sched_setattr
381 common sched_getattr sys_sched_getattr
382 common renameat2 sys_renameat2
383 common seccomp sys_seccomp
384 common getrandom sys_getrandom
385 common memfd_create sys_memfd_create
386 common bpf sys_bpf
387 common execveat sys_execveat
388 common userfaultfd sys_userfaultfd
389 common membarrier sys_membarrier
390 common mlock2 sys_mlock2
391 common copy_file_range sys_copy_file_range
392 common preadv2 sys_preadv2
393 common pwritev2 sys_pwritev2
394 common pkey_mprotect sys_pkey_mprotect
395 common pkey_alloc sys_pkey_alloc
396 common pkey_free sys_pkey_free
397 common statx sys_statx
398 common rseq sys_rseq
399 common io_pgetevents sys_io_pgetevents_time32
400 common migrate_pages sys_migrate_pages
401 common kexec_file_load sys_kexec_file_load
# 402 is unused
403 common clock_gettime64 sys_clock_gettime
404 common clock_settime64 sys_clock_settime
405 common clock_adjtime64 sys_clock_adjtime
406 common clock_getres_time64 sys_clock_getres
407 common clock_nanosleep_time64 sys_clock_nanosleep
408 common timer_gettime64 sys_timer_gettime
409 common timer_settime64 sys_timer_settime
410 common timerfd_gettime64 sys_timerfd_gettime
411 common timerfd_settime64 sys_timerfd_settime
412 common utimensat_time64 sys_utimensat
413 common pselect6_time64 sys_pselect6
414 common ppoll_time64 sys_ppoll
416 common io_pgetevents_time64 sys_io_pgetevents
417 common recvmmsg_time64 sys_recvmmsg
418 common mq_timedsend_time64 sys_mq_timedsend
419 common mq_timedreceive_time64 sys_mq_timedreceive
420 common semtimedop_time64 sys_semtimedop
421 common rt_sigtimedwait_time64 sys_rt_sigtimedwait
422 common futex_time64 sys_futex
423 common sched_rr_get_interval_time64 sys_sched_rr_get_interval
424 common pidfd_send_signal sys_pidfd_send_signal
425 common io_uring_setup sys_io_uring_setup
426 common io_uring_enter sys_io_uring_enter
427 common io_uring_register sys_io_uring_register
428 common open_tree sys_open_tree
429 common move_mount sys_move_mount
430 common fsopen sys_fsopen
431 common fsconfig sys_fsconfig
432 common fsmount sys_fsmount
433 common fspick sys_fspick
434 common pidfd_open sys_pidfd_open
435 common clone3 sys_clone3
436 common close_range sys_close_range
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
442 common mount_setattr sys_mount_setattr
443 common quotactl_fd sys_quotactl_fd
444 common landlock_create_ruleset sys_landlock_create_ruleset
445 common landlock_add_rule sys_landlock_add_rule
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
450 common set_mempolicy_home_node sys_set_mempolicy_home_node
451 common cachestat sys_cachestat
452 common fchmodat2 sys_fchmodat2
453 common map_shadow_stack sys_map_shadow_stack
454 common futex_wake sys_futex_wake
455 common futex_wait sys_futex_wait
456 common futex_requeue sys_futex_requeue
457 common statmount sys_statmount
458 common listmount sys_listmount
459 common lsm_get_self_attr sys_lsm_get_self_attr
460 common lsm_set_self_attr sys_lsm_set_self_attr
461 common lsm_list_modules sys_lsm_list_modules
462 common mseal sys_mseal
463 common setxattrat sys_setxattrat
464 common getxattrat sys_getxattrat
465 common listxattrat sys_listxattrat
466 common removexattrat sys_removexattrat
467 common open_tree_attr sys_open_tree_attr
468 common file_getattr sys_file_getattr
469 common file_setattr sys_file_setattr
470 common listns sys_listns
471 common rseq_slice_yield sys_rseq_slice_yield
linux-7.2.3/tools/perf/arch/arm/include/arch-tests.h
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ARCH_TESTS_H
#define ARCH_TESTS_H
extern struct test_suite *arch_tests[];
#endif
linux-7.2.3/tools/perf/arch/arm/include/dwarf-regs-table.h
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/* SPDX-License-Identifier: GPL-2.0 */
#ifdef DEFINE_DWARF_REGSTR_TABLE
/* This is included in perf/util/dwarf-regs.c */
static const char * const arm_regstr_tbl[] = {
"%r0", "%r1", "%r2", "%r3", "%r4",
"%r5", "%r6", "%r7", "%r8", "%r9", "%r10",
"%fp", "%ip", "%sp", "%lr", "%pc",
};
#endif
linux-7.2.3/tools/perf/arch/arm/include/perf_regs.h
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ARCH_PERF_REGS_H
#define ARCH_PERF_REGS_H
#include <stdlib.h>
#include <linux/types.h>
#include "../../../../arch/arm/include/uapi/asm/perf_regs.h"
void perf_regs_load(u64 *regs);
#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM_MAX) - 1)
#define PERF_REGS_MAX PERF_REG_ARM_MAX
#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32
#endif /* ARCH_PERF_REGS_H */
linux-7.2.3/tools/perf/arch/arm/tests/Build
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perf-test-y += regs_load.o
perf-test-y += dwarf-unwind.o
perf-test-y += vectors-page.o
perf-test-y += arch-tests.o
linux-7.2.3/tools/perf/arch/arm/tests/arch-tests.c
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// SPDX-License-Identifier: GPL-2.0
#include <string.h>
#include "tests/tests.h"
#include "arch-tests.h"
struct test_suite *arch_tests[] = {
#ifdef HAVE_DWARF_UNWIND_SUPPORT
&suite__dwarf_unwind,
#endif
&suite__vectors_page,
NULL,
};
linux-7.2.3/tools/perf/arch/arm/tests/dwarf-unwind.c
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// SPDX-License-Identifier: GPL-2.0
#include <string.h>
#include "perf_regs.h"
#include "thread.h"
#include "map.h"
#include "maps.h"
#include "event.h"
#include "debug.h"
#include "tests/tests.h"
#define STACK_SIZE 8192
static int sample_ustack(struct perf_sample *sample,
struct thread *thread, u64 *regs)
{
struct stack_dump *stack = &sample->user_stack;
struct map *map;
unsigned long sp;
u64 stack_size, *buf;
buf = malloc(STACK_SIZE);
if (!buf) {
pr_debug("failed to allocate sample uregs data\n");
return -1;
}
sp = (unsigned long) regs[PERF_REG_ARM_SP];
map = maps__find(thread__maps(thread), (u64)sp);
if (!map) {
pr_debug("failed to get stack map\n");
free(buf);
return -1;
}
stack_size = map__end(map) - sp;
stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
memcpy(buf, (void *) sp, stack_size);
stack->data = (char *) buf;
stack->size = stack_size;
return 0;
}
int test__arch_unwind_sample(struct perf_sample *sample,
struct thread *thread)
{
struct regs_dump *regs = perf_sample__user_regs(sample);
u64 *buf;
buf = calloc(1, sizeof(u64) * PERF_REGS_MAX);
if (!buf) {
pr_debug("failed to allocate sample uregs data\n");
return -1;
}
perf_regs_load(buf);
regs->abi = PERF_SAMPLE_REGS_ABI;
regs->regs = buf;
regs->mask = PERF_REGS_MASK;
return sample_ustack(sample, thread, buf);
}
linux-7.2.3/tools/perf/arch/arm/tests/regs_load.S
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/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/linkage.h>
#define R0 0x00
#define R1 0x08
#define R2 0x10
#define R3 0x18
#define R4 0x20
#define R5 0x28
#define R6 0x30
#define R7 0x38
#define R8 0x40
#define R9 0x48
#define SL 0x50
#define FP 0x58
#define IP 0x60
#define SP 0x68
#define LR 0x70
#define PC 0x78
/*
* Implementation of void perf_regs_load(u64 *regs);
*
* This functions fills in the 'regs' buffer from the actual registers values,
* in the way the perf built-in unwinding test expects them:
* - the PC at the time at the call to this function. Since this function
* is called using a bl instruction, the PC value is taken from LR.
* The built-in unwinding test then unwinds the call stack from the dwarf
* information in unwind__get_entries.
*
* Notes:
* - the 8 bytes stride in the registers offsets comes from the fact
* that the registers are stored in an u64 array (u64 *regs),
* - the regs buffer needs to be zeroed before the call to this function,
* in this case using a calloc in dwarf-unwind.c.
*/
.text
.type perf_regs_load,%function
SYM_FUNC_START(perf_regs_load)
str r0, [r0, #R0]
str r1, [r0, #R1]
str r2, [r0, #R2]
str r3, [r0, #R3]
str r4, [r0, #R4]
str r5, [r0, #R5]
str r6, [r0, #R6]
str r7, [r0, #R7]
str r8, [r0, #R8]
str r9, [r0, #R9]
str sl, [r0, #SL]
str fp, [r0, #FP]
str ip, [r0, #IP]
str sp, [r0, #SP]
str lr, [r0, #LR]
str lr, [r0, #PC] // store pc as lr in order to skip the call
// to this function
mov pc, lr
SYM_FUNC_END(perf_regs_load)
linux-7.2.3/tools/perf/arch/arm/tests/vectors-page.c
+25
View File
@@ -0,0 +1,25 @@
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>
#include <linux/compiler.h>
#include "debug.h"
#include "tests/tests.h"
#include "util/find-map.c"
#define VECTORS__MAP_NAME "[vectors]"
static int test__vectors_page(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
void *start, *end;
if (find_map(&start, &end, VECTORS__MAP_NAME)) {
pr_err("%s not found, is CONFIG_KUSER_HELPERS enabled?\n",
VECTORS__MAP_NAME);
return TEST_FAIL;
}
return TEST_OK;
}
DEFINE_SUITE("Vectors page", vectors_page);
linux-7.2.3/tools/perf/arch/arm/util/Build
+1
View File
@@ -0,0 +1 @@
perf-util-y += pmu.o auxtrace.o cs-etm.o
linux-7.2.3/tools/perf/arch/arm/util/auxtrace.c
+220
View File
@@ -0,0 +1,220 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright(C) 2015 Linaro Limited. All rights reserved.
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#include <dirent.h>
#include <errno.h>
#include <stdbool.h>
#include <linux/coresight-pmu.h>
#include <stdlib.h>
#include <api/fs/fs.h>
#include "../../../util/auxtrace.h"
#include "../../../util/debug.h"
#include "../../../util/evlist.h"
#include "../../../util/pmu.h"
#include "../../../util/pmus.h"
#include "cs-etm.h"
#include "arm-spe.h"
#include "hisi-ptt.h"
static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err)
{
struct perf_pmu **arm_spe_pmus = NULL;
int ret, i, nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
/* arm_spe_xxxxxxxxx\0 */
char arm_spe_pmu_name[sizeof(ARM_SPE_PMU_NAME) + 10];
arm_spe_pmus = calloc(nr_cpus, sizeof(struct perf_pmu *));
if (!arm_spe_pmus) {
pr_err("spes alloc failed\n");
*err = -ENOMEM;
return NULL;
}
for (i = 0; i < nr_cpus; i++) {
ret = sprintf(arm_spe_pmu_name, "%s%d", ARM_SPE_PMU_NAME, i);
if (ret < 0) {
pr_err("sprintf failed\n");
*err = -ENOMEM;
return NULL;
}
arm_spe_pmus[*nr_spes] = perf_pmus__find(arm_spe_pmu_name);
if (arm_spe_pmus[*nr_spes]) {
pr_debug2("%s %d: arm_spe_pmu %d type %d name %s\n",
__func__, __LINE__, *nr_spes,
arm_spe_pmus[*nr_spes]->type,
arm_spe_pmus[*nr_spes]->name);
(*nr_spes)++;
}
}
return arm_spe_pmus;
}
static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err)
{
struct perf_pmu **hisi_ptt_pmus = NULL;
struct dirent *dent;
char path[PATH_MAX];
DIR *dir = NULL;
int idx = 0;
perf_pmu__event_source_devices_scnprintf(path, sizeof(path));
dir = opendir(path);
if (!dir) {
pr_err("can't read directory '%s'\n", path);
*err = -EINVAL;
return NULL;
}
while ((dent = readdir(dir))) {
if (strstr(dent->d_name, HISI_PTT_PMU_NAME))
(*nr_ptts)++;
}
if (!(*nr_ptts))
goto out;
hisi_ptt_pmus = calloc((*nr_ptts), sizeof(struct perf_pmu *));
if (!hisi_ptt_pmus) {
pr_err("hisi_ptt alloc failed\n");
*err = -ENOMEM;
goto out;
}
rewinddir(dir);
while ((dent = readdir(dir))) {
if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < *nr_ptts) {
hisi_ptt_pmus[idx] = perf_pmus__find(dent->d_name);
if (hisi_ptt_pmus[idx])
idx++;
}
}
out:
closedir(dir);
return hisi_ptt_pmus;
}
static struct perf_pmu *find_pmu_for_event(struct perf_pmu **pmus,
int pmu_nr, struct evsel *evsel)
{
int i;
if (!pmus)
return NULL;
for (i = 0; i < pmu_nr; i++) {
if (evsel->core.attr.type == pmus[i]->type)
return pmus[i];
}
return NULL;
}
struct auxtrace_record
*auxtrace_record__init(struct evlist *evlist, int *err)
{
struct perf_pmu *cs_etm_pmu = NULL;
struct perf_pmu **arm_spe_pmus = NULL;
struct perf_pmu **hisi_ptt_pmus = NULL;
struct evsel *evsel;
struct perf_pmu *found_etm = NULL;
struct perf_pmu *found_spe = NULL;
struct perf_pmu *found_ptt = NULL;
int auxtrace_event_cnt = 0;
int nr_spes = 0;
int nr_ptts = 0;
if (!evlist)
return NULL;
cs_etm_pmu = perf_pmus__find(CORESIGHT_ETM_PMU_NAME);
arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err);
hisi_ptt_pmus = find_all_hisi_ptt_pmus(&nr_ptts, err);
evlist__for_each_entry(evlist, evsel) {
if (cs_etm_pmu && !found_etm)
found_etm = find_pmu_for_event(&cs_etm_pmu, 1, evsel);
if (arm_spe_pmus && !found_spe)
found_spe = find_pmu_for_event(arm_spe_pmus, nr_spes, evsel);
if (hisi_ptt_pmus && !found_ptt)
found_ptt = find_pmu_for_event(hisi_ptt_pmus, nr_ptts, evsel);
}
free(arm_spe_pmus);
free(hisi_ptt_pmus);
if (found_etm)
auxtrace_event_cnt++;
if (found_spe)
auxtrace_event_cnt++;
if (found_ptt)
auxtrace_event_cnt++;
if (auxtrace_event_cnt > 1) {
pr_err("Concurrent AUX trace operation not currently supported\n");
*err = -EOPNOTSUPP;
return NULL;
}
if (found_etm)
return cs_etm_record_init(err);
#if defined(__aarch64__)
if (found_spe)
return arm_spe_recording_init(err, found_spe);
if (found_ptt)
return hisi_ptt_recording_init(err, found_ptt);
#endif
/*
* Clear 'err' even if we haven't found an event - that way perf
* record can still be used even if tracers aren't present. The NULL
* return value will take care of telling the infrastructure HW tracing
* isn't available.
*/
*err = 0;
return NULL;
}
#if defined(__arm__)
u64 compat_auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
{
struct perf_event_mmap_page *pc = mm->userpg;
u64 result;
__asm__ __volatile__(
" ldrd %0, %H0, [%1]"
: "=&r" (result)
: "r" (&pc->aux_head), "Qo" (pc->aux_head)
);
return result;
}
int compat_auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
{
struct perf_event_mmap_page *pc = mm->userpg;
/* Ensure all reads are done before we write the tail out */
smp_mb();
__asm__ __volatile__(
" strd %2, %H2, [%1]"
: "=Qo" (pc->aux_tail)
: "r" (&pc->aux_tail), "r" (tail)
);
return 0;
}
#endif
linux-7.2.3/tools/perf/arch/arm/util/cs-etm.c
+926
View File
@@ -0,0 +1,926 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright(C) 2015 Linaro Limited. All rights reserved.
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#include "../../../util/cs-etm.h"
#include <errno.h>
#include <stdlib.h>
#include <linux/bitops.h>
#include <linux/bits.h>
#include <linux/compiler.h>
#include <linux/coresight-pmu.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/zalloc.h>
#include <sys/stat.h>
#include <api/fs/fs.h>
#include <internal/lib.h> // page_size
#include "../../../util/auxtrace.h"
#include "../../../util/cpumap.h"
#include "../../../util/debug.h"
#include "../../../util/event.h"
#include "../../../util/evlist.h"
#include "../../../util/evsel.h"
#include "../../../util/evsel_config.h"
#include "../../../util/perf_api_probe.h"
#include "../../../util/pmu.h"
#include "../../../util/pmus.h"
#include "../../../util/record.h"
#include "../../../util/session.h"
#include "cs-etm.h"
struct cs_etm_recording {
struct auxtrace_record itr;
struct perf_pmu *cs_etm_pmu;
struct evlist *evlist;
bool snapshot_mode;
size_t snapshot_size;
};
static const char *metadata_etmv3_ro[CS_ETM_PRIV_MAX] = {
[CS_ETM_ETMCCER] = "mgmt/etmccer",
[CS_ETM_ETMIDR] = "mgmt/etmidr",
};
static const char * const metadata_etmv4_ro[] = {
[CS_ETMV4_TRCIDR0] = "trcidr/trcidr0",
[CS_ETMV4_TRCIDR1] = "trcidr/trcidr1",
[CS_ETMV4_TRCIDR2] = "trcidr/trcidr2",
[CS_ETMV4_TRCIDR8] = "trcidr/trcidr8",
[CS_ETMV4_TRCAUTHSTATUS] = "mgmt/trcauthstatus",
[CS_ETMV4_TS_SOURCE] = "ts_source",
};
static const char * const metadata_ete_ro[] = {
[CS_ETE_TRCIDR0] = "trcidr/trcidr0",
[CS_ETE_TRCIDR1] = "trcidr/trcidr1",
[CS_ETE_TRCIDR2] = "trcidr/trcidr2",
[CS_ETE_TRCIDR8] = "trcidr/trcidr8",
[CS_ETE_TRCAUTHSTATUS] = "mgmt/trcauthstatus",
[CS_ETE_TRCDEVARCH] = "mgmt/trcdevarch",
[CS_ETE_TS_SOURCE] = "ts_source",
};
enum cs_etm_version { CS_NOT_PRESENT, CS_ETMV3, CS_ETMV4, CS_ETE };
static bool cs_etm_is_ete(struct perf_pmu *cs_etm_pmu, struct perf_cpu cpu);
static int cs_etm_get_ro(struct perf_pmu *pmu, struct perf_cpu cpu, const char *path, __u64 *val);
static bool cs_etm_pmu_path_exists(struct perf_pmu *pmu, struct perf_cpu cpu, const char *path);
static enum cs_etm_version cs_etm_get_version(struct perf_pmu *cs_etm_pmu,
struct perf_cpu cpu)
{
if (cs_etm_is_ete(cs_etm_pmu, cpu))
return CS_ETE;
else if (cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR0]))
return CS_ETMV4;
else if (cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_etmv3_ro[CS_ETM_ETMCCER]))
return CS_ETMV3;
return CS_NOT_PRESENT;
}
static int cs_etm_validate_context_id(struct perf_pmu *cs_etm_pmu, struct evsel *evsel,
struct perf_cpu cpu)
{
int err;
u64 ctxt, ctxt1, ctxt2;
__u64 trcidr2;
evsel__get_config_val(evsel, "contextid", &ctxt);
evsel__get_config_val(evsel, "contextid1", &ctxt1);
evsel__get_config_val(evsel, "contextid2", &ctxt2);
if (!ctxt && !ctxt1 && !ctxt2)
return 0;
/* Not supported in etmv3 */
if (cs_etm_get_version(cs_etm_pmu, cpu) == CS_ETMV3) {
pr_err("%s: contextid not supported in ETMv3, disable with %s/contextid=0/\n",
CORESIGHT_ETM_PMU_NAME, CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
/* Get a handle on TRCIDR2 */
err = cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR2], &trcidr2);
if (err)
return err;
if (ctxt1) {
/*
* TRCIDR2.CIDSIZE, bit [9-5], indicates whether contextID
* tracing is supported:
* 0b00000 Context ID tracing is not supported.
* 0b00100 Maximum of 32-bit Context ID size.
* All other values are reserved.
*/
if (BMVAL(trcidr2, 5, 9) != 0x4) {
pr_err("%s: CONTEXTIDR_EL1 isn't supported, disable with %s/contextid1=0/\n",
CORESIGHT_ETM_PMU_NAME, CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
}
if (ctxt2) {
/*
* TRCIDR2.VMIDOPT[30:29] != 0 and
* TRCIDR2.VMIDSIZE[14:10] == 0b00100 (32bit virtual contextid)
* We can't support CONTEXTIDR in VMID if the size of the
* virtual context id is < 32bit.
* Any value of VMIDSIZE >= 4 (i.e, > 32bit) is fine for us.
*/
if (!BMVAL(trcidr2, 29, 30) || BMVAL(trcidr2, 10, 14) < 4) {
pr_err("%s: CONTEXTIDR_EL2 isn't supported, disable with %s/contextid2=0/\n",
CORESIGHT_ETM_PMU_NAME, CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
}
return 0;
}
static int cs_etm_validate_timestamp(struct perf_pmu *cs_etm_pmu, struct evsel *evsel,
struct perf_cpu cpu)
{
int err;
u64 val;
__u64 trcidr0;
evsel__get_config_val(evsel, "timestamp", &val);
if (!val)
return 0;
if (cs_etm_get_version(cs_etm_pmu, cpu) == CS_ETMV3) {
pr_err("%s: timestamp not supported in ETMv3, disable with %s/timestamp=0/\n",
CORESIGHT_ETM_PMU_NAME, CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
/* Get a handle on TRCIRD0 */
err = cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR0], &trcidr0);
if (err)
return err;
/*
* TRCIDR0.TSSIZE, bit [28-24], indicates whether global timestamping
* is supported:
* 0b00000 Global timestamping is not implemented
* 0b00110 Implementation supports a maximum timestamp of 48bits.
* 0b01000 Implementation supports a maximum timestamp of 64bits.
*/
trcidr0 &= GENMASK(28, 24);
if (!trcidr0)
return -EINVAL;
return 0;
}
static struct perf_pmu *cs_etm_get_pmu(struct auxtrace_record *itr)
{
struct cs_etm_recording *ptr = container_of(itr, struct cs_etm_recording, itr);
return ptr->cs_etm_pmu;
}
/*
* Check whether the requested timestamp and contextid options should be
* available on all requested CPUs and if not, tell the user how to override.
* The kernel will silently disable any unavailable options so a warning here
* first is better. In theory the kernel could still disable the option for
* some other reason so this is best effort only.
*/
static int cs_etm_validate_config(struct perf_pmu *cs_etm_pmu,
struct evsel *evsel)
{
unsigned int idx;
int err = 0;
struct perf_cpu_map *event_cpus = evsel->evlist->core.user_requested_cpus;
struct perf_cpu_map *intersect_cpus;
struct perf_cpu cpu;
/*
* Set option of each CPU we have. In per-cpu case, do the validation
* for CPUs to work with. In per-thread case, the CPU map has the "any"
* CPU value. Since the traced program can run on any CPUs in this case,
* thus don't skip validation.
*/
if (!perf_cpu_map__has_any_cpu(event_cpus)) {
struct perf_cpu_map *online_cpus = perf_cpu_map__new_online_cpus();
intersect_cpus = perf_cpu_map__intersect(event_cpus, online_cpus);
perf_cpu_map__put(online_cpus);
} else {
intersect_cpus = perf_cpu_map__new_online_cpus();
}
perf_cpu_map__for_each_cpu_skip_any(cpu, idx, intersect_cpus) {
if (cs_etm_get_version(cs_etm_pmu, cpu) == CS_NOT_PRESENT) {
pr_err("%s: Not found on CPU %d. Check hardware and firmware support and that all Coresight drivers are loaded\n",
CORESIGHT_ETM_PMU_NAME, cpu.cpu);
return -EINVAL;
}
err = cs_etm_validate_context_id(cs_etm_pmu, evsel, cpu);
if (err)
break;
err = cs_etm_validate_timestamp(cs_etm_pmu, evsel, cpu);
if (err)
break;
}
perf_cpu_map__put(intersect_cpus);
return err;
}
static int cs_etm_parse_snapshot_options(struct auxtrace_record *itr,
struct record_opts *opts,
const char *str)
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
unsigned long long snapshot_size = 0;
char *endptr;
if (str) {
snapshot_size = strtoull(str, &endptr, 0);
if (*endptr || snapshot_size > SIZE_MAX)
return -1;
}
opts->auxtrace_snapshot_mode = true;
opts->auxtrace_snapshot_size = snapshot_size;
ptr->snapshot_size = snapshot_size;
return 0;
}
/*
* If the sink name format "@sink_name" is used, lookup the sink by name to convert to
* "sinkid=sink_hash" format. If the user has already manually provided a hash then
* "sinkid" isn't overwritten. If neither are provided then the driver will pick the best
* sink.
*/
static int cs_etm_set_sink_attr(struct perf_pmu *pmu,
struct evsel *evsel)
{
char msg[BUFSIZ], path[PATH_MAX], *sink;
struct evsel_config_term *term;
u32 hash;
int ret;
list_for_each_entry(term, &evsel->config_terms, list) {
if (term->type != EVSEL__CONFIG_TERM_DRV_CFG)
continue;
sink = term->val.str;
snprintf(path, PATH_MAX, "sinks/%s", sink);
ret = perf_pmu__scan_file(pmu, path, "%x", &hash);
if (ret != 1) {
if (errno == ENOENT)
pr_err("Couldn't find sink \"%s\" on event %s\n"
"Missing kernel or device support?\n\n"
"Hint: An appropriate sink will be picked automatically if one isn't specified.\n",
sink, evsel__name(evsel));
else
pr_err("Failed to set sink \"%s\" on event %s with %d (%s)\n",
sink, evsel__name(evsel), errno,
str_error_r(errno, msg, sizeof(msg)));
return ret;
}
evsel__set_config_if_unset(evsel, "sinkid", hash);
return 0;
}
return 0;
}
static struct evsel *cs_etm_get_evsel(struct evlist *evlist,
struct perf_pmu *cs_etm_pmu)
{
struct evsel *evsel;
evlist__for_each_entry(evlist, evsel) {
if (evsel->core.attr.type == cs_etm_pmu->type)
return evsel;
}
return NULL;
}
static int cs_etm_recording_options(struct auxtrace_record *itr,
struct evlist *evlist,
struct record_opts *opts)
{
int ret;
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
struct evsel *evsel, *cs_etm_evsel = NULL;
struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
bool privileged = perf_event_paranoid_check(-1);
int err = 0;
evlist__for_each_entry(evlist, evsel) {
if (evsel->core.attr.type == cs_etm_pmu->type) {
if (cs_etm_evsel) {
pr_err("There may be only one %s event\n",
CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
cs_etm_evsel = evsel;
}
}
/* no need to continue if at least one event of interest was found */
if (!cs_etm_evsel)
return 0;
ptr->evlist = evlist;
ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
if (!record_opts__no_switch_events(opts) &&
perf_can_record_switch_events())
opts->record_switch_events = true;
cs_etm_evsel->needs_auxtrace_mmap = true;
opts->full_auxtrace = true;
ret = cs_etm_set_sink_attr(cs_etm_pmu, cs_etm_evsel);
if (ret)
return ret;
if (opts->use_clockid) {
pr_err("Cannot use clockid (-k option) with %s\n",
CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
/* we are in snapshot mode */
if (opts->auxtrace_snapshot_mode) {
/*
* No size were given to '-S' or '-m,', so go with
* the default
*/
if (!opts->auxtrace_snapshot_size &&
!opts->auxtrace_mmap_pages) {
if (privileged) {
opts->auxtrace_mmap_pages = MiB(4) / page_size;
} else {
opts->auxtrace_mmap_pages =
KiB(128) / page_size;
if (opts->mmap_pages == UINT_MAX)
opts->mmap_pages = KiB(256) / page_size;
}
} else if (!opts->auxtrace_mmap_pages && !privileged &&
opts->mmap_pages == UINT_MAX) {
opts->mmap_pages = KiB(256) / page_size;
}
/*
* '-m,xyz' was specified but no snapshot size, so make the
* snapshot size as big as the auxtrace mmap area.
*/
if (!opts->auxtrace_snapshot_size) {
opts->auxtrace_snapshot_size =
opts->auxtrace_mmap_pages * (size_t)page_size;
}
/*
* -Sxyz was specified but no auxtrace mmap area, so make the
* auxtrace mmap area big enough to fit the requested snapshot
* size.
*/
if (!opts->auxtrace_mmap_pages) {
size_t sz = opts->auxtrace_snapshot_size;
sz = round_up(sz, page_size) / page_size;
opts->auxtrace_mmap_pages = roundup_pow_of_two(sz);
}
/* Snapshot size can't be bigger than the auxtrace area */
if (opts->auxtrace_snapshot_size >
opts->auxtrace_mmap_pages * (size_t)page_size) {
pr_err("Snapshot size %zu must not be greater than AUX area tracing mmap size %zu\n",
opts->auxtrace_snapshot_size,
opts->auxtrace_mmap_pages * (size_t)page_size);
return -EINVAL;
}
/* Something went wrong somewhere - this shouldn't happen */
if (!opts->auxtrace_snapshot_size ||
!opts->auxtrace_mmap_pages) {
pr_err("Failed to calculate default snapshot size and/or AUX area tracing mmap pages\n");
return -EINVAL;
}
}
/* Buffer sizes weren't specified with '-m,xyz' so give some defaults */
if (!opts->auxtrace_mmap_pages) {
if (privileged) {
opts->auxtrace_mmap_pages = MiB(4) / page_size;
} else {
opts->auxtrace_mmap_pages = KiB(128) / page_size;
if (opts->mmap_pages == UINT_MAX)
opts->mmap_pages = KiB(256) / page_size;
}
}
if (opts->auxtrace_snapshot_mode)
pr_debug2("%s snapshot size: %zu\n", CORESIGHT_ETM_PMU_NAME,
opts->auxtrace_snapshot_size);
/*
* To obtain the auxtrace buffer file descriptor, the auxtrace
* event must come first.
*/
evlist__to_front(evlist, cs_etm_evsel);
/*
* get the CPU on the sample - need it to associate trace ID in the
* AUX_OUTPUT_HW_ID event, and the AUX event for per-cpu mmaps.
*/
evsel__set_sample_bit(cs_etm_evsel, CPU);
/*
* Also the case of per-cpu mmaps, need the contextID in order to be notified
* when a context switch happened.
*/
if (!perf_cpu_map__is_any_cpu_or_is_empty(cpus)) {
evsel__set_config_if_unset(cs_etm_evsel, "timestamp", 1);
evsel__set_config_if_unset(cs_etm_evsel, "contextid", 1);
}
/*
* When the option '--timestamp' or '-T' is enabled, the PERF_SAMPLE_TIME
* bit is set for all events. In this case, always enable Arm CoreSight
* timestamp tracing.
*/
if (opts->sample_time_set)
evsel__set_config_if_unset(cs_etm_evsel, "timestamp", 1);
/* Add dummy event to keep tracking */
err = parse_event(evlist, "dummy:u");
if (err)
goto out;
evsel = evlist__last(evlist);
evlist__set_tracking_event(evlist, evsel);
evsel->core.attr.freq = 0;
evsel->core.attr.sample_period = 1;
/* In per-cpu case, always need the time of mmap events etc */
if (!perf_cpu_map__is_any_cpu_or_is_empty(cpus))
evsel__set_sample_bit(evsel, TIME);
err = cs_etm_validate_config(cs_etm_pmu, cs_etm_evsel);
out:
return err;
}
static u64 cs_etm_synth_etmcr(struct auxtrace_record *itr)
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
struct evsel *evsel = cs_etm_get_evsel(ptr->evlist, cs_etm_pmu);
u64 etmcr = 0;
u64 val;
if (!evsel)
return 0;
/*
* Synthesize what the kernel programmed into ETMCR based on
* what options the event was opened with. This doesn't have to be
* complete or 100% accurate, not all bits used by OpenCSD anyway.
*/
if (!evsel__get_config_val(evsel, "cycacc", &val) && val)
etmcr |= ETMCR_CYC_ACC;
if (!evsel__get_config_val(evsel, "timestamp", &val) && val)
etmcr |= ETMCR_TIMESTAMP_EN;
if (!evsel__get_config_val(evsel, "retstack", &val) && val)
etmcr |= ETMCR_RETURN_STACK;
return etmcr;
}
static u64 cs_etmv4_synth_trcconfigr(struct auxtrace_record *itr)
{
u64 trcconfigr = 0;
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
struct evsel *evsel = cs_etm_get_evsel(ptr->evlist, cs_etm_pmu);
u64 val;
if (!evsel)
return 0;
/*
* Synthesize what the kernel programmed into TRCCONFIGR based on
* what options the event was opened with. This doesn't have to be
* complete or 100% accurate, not all bits used by OpenCSD anyway.
*/
if (!evsel__get_config_val(evsel, "cycacc", &val) && val)
trcconfigr |= TRCCONFIGR_CCI;
if (!evsel__get_config_val(evsel, "contextid1", &val) && val)
trcconfigr |= TRCCONFIGR_CID;
if (!evsel__get_config_val(evsel, "timestamp", &val) && val)
trcconfigr |= TRCCONFIGR_TS;
if (!evsel__get_config_val(evsel, "retstack", &val) && val)
trcconfigr |= TRCCONFIGR_RS;
if (!evsel__get_config_val(evsel, "contextid2", &val) && val)
trcconfigr |= TRCCONFIGR_VMID | TRCCONFIGR_VMIDOPT;
if (!evsel__get_config_val(evsel, "branch_broadcast", &val) && val)
trcconfigr |= TRCCONFIGR_BB;
return trcconfigr;
}
static size_t
cs_etm_info_priv_size(struct auxtrace_record *itr,
struct evlist *evlist)
{
unsigned int idx;
int etmv3 = 0, etmv4 = 0, ete = 0;
struct perf_cpu_map *event_cpus = evlist->core.user_requested_cpus;
struct perf_cpu_map *intersect_cpus;
struct perf_cpu cpu;
struct perf_pmu *cs_etm_pmu = cs_etm_get_pmu(itr);
if (!perf_cpu_map__has_any_cpu(event_cpus)) {
/* cpu map is not "any" CPU , we have specific CPUs to work with */
struct perf_cpu_map *online_cpus = perf_cpu_map__new_online_cpus();
intersect_cpus = perf_cpu_map__intersect(event_cpus, online_cpus);
perf_cpu_map__put(online_cpus);
} else {
/* Event can be "any" CPU so count all online CPUs. */
intersect_cpus = perf_cpu_map__new_online_cpus();
}
/* Count number of each type of ETM. Don't count if that CPU has CS_NOT_PRESENT. */
perf_cpu_map__for_each_cpu_skip_any(cpu, idx, intersect_cpus) {
enum cs_etm_version v = cs_etm_get_version(cs_etm_pmu, cpu);
ete += v == CS_ETE;
etmv4 += v == CS_ETMV4;
etmv3 += v == CS_ETMV3;
}
perf_cpu_map__put(intersect_cpus);
return (CS_ETM_HEADER_SIZE +
(ete * CS_ETE_PRIV_SIZE) +
(etmv4 * CS_ETMV4_PRIV_SIZE) +
(etmv3 * CS_ETMV3_PRIV_SIZE));
}
static int cs_etm_get_ro(struct perf_pmu *pmu, struct perf_cpu cpu, const char *path, __u64 *val)
{
char pmu_path[PATH_MAX];
int scan;
/* Get RO metadata from sysfs */
snprintf(pmu_path, PATH_MAX, "cpu%d/%s", cpu.cpu, path);
scan = perf_pmu__scan_file(pmu, pmu_path, "%llx", val);
if (scan != 1) {
pr_err("%s: error reading: %s\n", __func__, pmu_path);
return -EINVAL;
}
return 0;
}
static int cs_etm_get_ro_signed(struct perf_pmu *pmu, struct perf_cpu cpu, const char *path,
__u64 *out_val)
{
char pmu_path[PATH_MAX];
int scan;
int val = 0;
/* Get RO metadata from sysfs */
snprintf(pmu_path, PATH_MAX, "cpu%d/%s", cpu.cpu, path);
scan = perf_pmu__scan_file(pmu, pmu_path, "%d", &val);
if (scan != 1) {
pr_err("%s: error reading: %s\n", __func__, pmu_path);
return -EINVAL;
}
*out_val = (__u64) val;
return 0;
}
static bool cs_etm_pmu_path_exists(struct perf_pmu *pmu, struct perf_cpu cpu, const char *path)
{
char pmu_path[PATH_MAX];
/* Get RO metadata from sysfs */
snprintf(pmu_path, PATH_MAX, "cpu%d/%s", cpu.cpu, path);
return perf_pmu__file_exists(pmu, pmu_path);
}
#define TRCDEVARCH_ARCHPART_SHIFT 0
#define TRCDEVARCH_ARCHPART_MASK GENMASK(11, 0)
#define TRCDEVARCH_ARCHPART(x) (((x) & TRCDEVARCH_ARCHPART_MASK) >> TRCDEVARCH_ARCHPART_SHIFT)
#define TRCDEVARCH_ARCHVER_SHIFT 12
#define TRCDEVARCH_ARCHVER_MASK GENMASK(15, 12)
#define TRCDEVARCH_ARCHVER(x) (((x) & TRCDEVARCH_ARCHVER_MASK) >> TRCDEVARCH_ARCHVER_SHIFT)
static bool cs_etm_is_ete(struct perf_pmu *cs_etm_pmu, struct perf_cpu cpu)
{
__u64 trcdevarch;
if (!cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCDEVARCH]))
return false;
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCDEVARCH], &trcdevarch);
/*
* ETE if ARCHVER is 5 (ARCHVER is 4 for ETM) and ARCHPART is 0xA13.
* See ETM_DEVARCH_ETE_ARCH in coresight-etm4x.h
*/
return TRCDEVARCH_ARCHVER(trcdevarch) == 5 && TRCDEVARCH_ARCHPART(trcdevarch) == 0xA13;
}
static __u64 cs_etm_get_legacy_trace_id(struct perf_cpu cpu)
{
/* Wrap at 48 so that invalid trace IDs aren't saved into files. */
return CORESIGHT_LEGACY_CPU_TRACE_ID(cpu.cpu % 48);
}
static void cs_etm_save_etmv4_header(__u64 data[], struct auxtrace_record *itr, struct perf_cpu cpu)
{
struct cs_etm_recording *ptr = container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
/* Get trace configuration register */
data[CS_ETMV4_TRCCONFIGR] = cs_etmv4_synth_trcconfigr(itr);
/* traceID set to legacy version, in case new perf running on older system */
data[CS_ETMV4_TRCTRACEIDR] = cs_etm_get_legacy_trace_id(cpu);
/* Get read-only information from sysFS */
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR0],
&data[CS_ETMV4_TRCIDR0]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR1],
&data[CS_ETMV4_TRCIDR1]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR2],
&data[CS_ETMV4_TRCIDR2]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR8],
&data[CS_ETMV4_TRCIDR8]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TRCAUTHSTATUS],
&data[CS_ETMV4_TRCAUTHSTATUS]);
/* Kernels older than 5.19 may not expose ts_source */
if (!cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TS_SOURCE]) ||
cs_etm_get_ro_signed(cs_etm_pmu, cpu, metadata_etmv4_ro[CS_ETMV4_TS_SOURCE],
&data[CS_ETMV4_TS_SOURCE])) {
pr_debug3("[%03d] pmu file 'ts_source' not found. Fallback to safe value (-1)\n",
cpu.cpu);
data[CS_ETMV4_TS_SOURCE] = (__u64) -1;
}
}
static void cs_etm_save_ete_header(__u64 data[], struct auxtrace_record *itr, struct perf_cpu cpu)
{
struct cs_etm_recording *ptr = container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
/* Get trace configuration register */
data[CS_ETE_TRCCONFIGR] = cs_etmv4_synth_trcconfigr(itr);
/* traceID set to legacy version, in case new perf running on older system */
data[CS_ETE_TRCTRACEIDR] = cs_etm_get_legacy_trace_id(cpu);
/* Get read-only information from sysFS */
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCIDR0], &data[CS_ETE_TRCIDR0]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCIDR1], &data[CS_ETE_TRCIDR1]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCIDR2], &data[CS_ETE_TRCIDR2]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCIDR8], &data[CS_ETE_TRCIDR8]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCAUTHSTATUS],
&data[CS_ETE_TRCAUTHSTATUS]);
/* ETE uses the same registers as ETMv4 plus TRCDEVARCH */
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TRCDEVARCH],
&data[CS_ETE_TRCDEVARCH]);
/* Kernels older than 5.19 may not expose ts_source */
if (!cs_etm_pmu_path_exists(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TS_SOURCE]) ||
cs_etm_get_ro_signed(cs_etm_pmu, cpu, metadata_ete_ro[CS_ETE_TS_SOURCE],
&data[CS_ETE_TS_SOURCE])) {
pr_debug3("[%03d] pmu file 'ts_source' not found. Fallback to safe value (-1)\n",
cpu.cpu);
data[CS_ETE_TS_SOURCE] = (__u64) -1;
}
}
static void cs_etm_get_metadata(struct perf_cpu cpu, u32 *offset,
struct auxtrace_record *itr,
struct perf_record_auxtrace_info *info)
{
u32 increment, nr_trc_params;
u64 magic;
struct perf_pmu *cs_etm_pmu = cs_etm_get_pmu(itr);
/* first see what kind of tracer this cpu is affined to */
switch (cs_etm_get_version(cs_etm_pmu, cpu)) {
case CS_ETE:
magic = __perf_cs_ete_magic;
cs_etm_save_ete_header(&info->priv[*offset], itr, cpu);
/* How much space was used */
increment = CS_ETE_PRIV_MAX;
nr_trc_params = CS_ETE_PRIV_MAX - CS_ETM_COMMON_BLK_MAX_V1;
break;
case CS_ETMV4:
magic = __perf_cs_etmv4_magic;
cs_etm_save_etmv4_header(&info->priv[*offset], itr, cpu);
/* How much space was used */
increment = CS_ETMV4_PRIV_MAX;
nr_trc_params = CS_ETMV4_PRIV_MAX - CS_ETMV4_TRCCONFIGR;
break;
case CS_ETMV3:
magic = __perf_cs_etmv3_magic;
/* Get configuration register */
info->priv[*offset + CS_ETM_ETMCR] = cs_etm_synth_etmcr(itr);
/* traceID set to legacy value in case new perf running on old system */
info->priv[*offset + CS_ETM_ETMTRACEIDR] = cs_etm_get_legacy_trace_id(cpu);
/* Get read-only information from sysFS */
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv3_ro[CS_ETM_ETMCCER],
&info->priv[*offset + CS_ETM_ETMCCER]);
cs_etm_get_ro(cs_etm_pmu, cpu, metadata_etmv3_ro[CS_ETM_ETMIDR],
&info->priv[*offset + CS_ETM_ETMIDR]);
/* How much space was used */
increment = CS_ETM_PRIV_MAX;
nr_trc_params = CS_ETM_PRIV_MAX - CS_ETM_ETMCR;
break;
default:
case CS_NOT_PRESENT:
/* Unreachable, CPUs already validated in cs_etm_validate_config() */
assert(true);
return;
}
/* Build generic header portion */
info->priv[*offset + CS_ETM_MAGIC] = magic;
info->priv[*offset + CS_ETM_CPU] = cpu.cpu;
info->priv[*offset + CS_ETM_NR_TRC_PARAMS] = nr_trc_params;
/* Where the next CPU entry should start from */
*offset += increment;
}
static int cs_etm_info_fill(struct auxtrace_record *itr,
struct perf_session *session,
struct perf_record_auxtrace_info *info,
size_t priv_size)
{
unsigned int i;
u32 offset;
u64 nr_cpu, type;
struct perf_cpu_map *cpu_map;
struct perf_cpu_map *event_cpus = session->evlist->core.user_requested_cpus;
struct perf_cpu_map *online_cpus = perf_cpu_map__new_online_cpus();
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
struct perf_cpu cpu;
if (priv_size != cs_etm_info_priv_size(itr, session->evlist))
return -EINVAL;
if (!session->evlist->core.nr_mmaps)
return -EINVAL;
/* If the cpu_map has the "any" CPU all online CPUs are involved */
if (perf_cpu_map__has_any_cpu(event_cpus)) {
cpu_map = online_cpus;
} else {
/* Make sure all specified CPUs are online */
perf_cpu_map__for_each_cpu(cpu, i, event_cpus) {
if (!perf_cpu_map__has(online_cpus, cpu))
return -EINVAL;
}
cpu_map = event_cpus;
}
nr_cpu = perf_cpu_map__nr(cpu_map);
/* Get PMU type as dynamically assigned by the core */
type = cs_etm_pmu->type;
/* First fill out the session header */
info->type = PERF_AUXTRACE_CS_ETM;
info->priv[CS_HEADER_VERSION] = CS_HEADER_CURRENT_VERSION;
info->priv[CS_PMU_TYPE_CPUS] = type << 32;
info->priv[CS_PMU_TYPE_CPUS] |= nr_cpu;
info->priv[CS_ETM_SNAPSHOT] = ptr->snapshot_mode;
offset = CS_ETM_SNAPSHOT + 1;
perf_cpu_map__for_each_cpu(cpu, i, cpu_map) {
assert(offset < priv_size);
cs_etm_get_metadata(cpu, &offset, itr, info);
}
perf_cpu_map__put(online_cpus);
return 0;
}
static int cs_etm_snapshot_start(struct auxtrace_record *itr)
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct evsel *evsel = cs_etm_get_evsel(ptr->evlist, ptr->cs_etm_pmu);
if (evsel)
return evsel__disable(evsel);
return -EINVAL;
}
static int cs_etm_snapshot_finish(struct auxtrace_record *itr)
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct evsel *evsel;
evlist__for_each_entry(ptr->evlist, evsel) {
if (evsel->core.attr.type == ptr->cs_etm_pmu->type)
return evsel__enable(evsel);
}
return -EINVAL;
}
static u64 cs_etm_reference(struct auxtrace_record *itr __maybe_unused)
{
return (((u64) rand() << 0) & 0x00000000FFFFFFFFull) |
(((u64) rand() << 32) & 0xFFFFFFFF00000000ull);
}
static void cs_etm_recording_free(struct auxtrace_record *itr)
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
free(ptr);
}
struct auxtrace_record *cs_etm_record_init(int *err)
{
struct perf_pmu *cs_etm_pmu;
struct cs_etm_recording *ptr;
cs_etm_pmu = perf_pmus__find(CORESIGHT_ETM_PMU_NAME);
if (!cs_etm_pmu) {
*err = -EINVAL;
goto out;
}
ptr = zalloc(sizeof(struct cs_etm_recording));
if (!ptr) {
*err = -ENOMEM;
goto out;
}
ptr->cs_etm_pmu = cs_etm_pmu;
ptr->itr.parse_snapshot_options = cs_etm_parse_snapshot_options;
ptr->itr.recording_options = cs_etm_recording_options;
ptr->itr.info_priv_size = cs_etm_info_priv_size;
ptr->itr.info_fill = cs_etm_info_fill;
ptr->itr.snapshot_start = cs_etm_snapshot_start;
ptr->itr.snapshot_finish = cs_etm_snapshot_finish;
ptr->itr.reference = cs_etm_reference;
ptr->itr.free = cs_etm_recording_free;
ptr->itr.read_finish = auxtrace_record__read_finish;
*err = 0;
return &ptr->itr;
out:
return NULL;
}
/*
* Set a default config to enable the user changed config tracking mechanism
* (CFG_CHG and evsel__set_config_if_unset()). If no default is set then user
* changes aren't tracked.
*/
void
cs_etm_get_default_config(const struct perf_pmu *pmu __maybe_unused,
struct perf_event_attr *attr)
{
attr->sample_period = 1;
}
linux-7.2.3/tools/perf/arch/arm/util/cs-etm.h
+12
View File
@@ -0,0 +1,12 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright(C) 2015 Linaro Limited. All rights reserved.
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#ifndef INCLUDE__PERF_CS_ETM_H__
#define INCLUDE__PERF_CS_ETM_H__
struct auxtrace_record *cs_etm_record_init(int *err);
#endif
linux-7.2.3/tools/perf/arch/arm/util/pmu.c
+46
View File
@@ -0,0 +1,46 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright(C) 2015 Linaro Limited. All rights reserved.
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#include <string.h>
#include <linux/coresight-pmu.h>
#include <linux/perf_event.h>
#include <linux/string.h>
#include "arm-spe.h"
#include "hisi-ptt.h"
#include "../../../util/cpumap.h"
#include "../../../util/pmu.h"
#include "../../../util/cs-etm.h"
#include "../../arm64/util/mem-events.h"
void perf_pmu__arch_init(struct perf_pmu *pmu)
{
struct perf_cpu_map *intersect, *online = cpu_map__online();
if (!strcmp(pmu->name, CORESIGHT_ETM_PMU_NAME)) {
/* add ETM default config here */
pmu->auxtrace = true;
pmu->selectable = true;
pmu->perf_event_attr_init_default = cs_etm_get_default_config;
#if defined(__aarch64__)
} else if (strstarts(pmu->name, ARM_SPE_PMU_NAME)) {
pmu->auxtrace = true;
pmu->selectable = true;
pmu->is_uncore = false;
pmu->perf_event_attr_init_default = arm_spe_pmu_default_config;
if (strstarts(pmu->name, "arm_spe_"))
pmu->mem_events = perf_mem_events_arm;
} else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) {
pmu->auxtrace = true;
pmu->selectable = true;
#endif
}
/* Workaround some ARM PMU's failing to correctly set CPU maps for online processors. */
intersect = perf_cpu_map__intersect(online, pmu->cpus);
perf_cpu_map__put(online);
perf_cpu_map__put(pmu->cpus);
pmu->cpus = intersect;
}