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Make.tags.inc
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Makefile
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bus_if.m
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capabilities.conf
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clock_if.m
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cpufreq_if.m
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device_if.m
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firmw.S
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genassym.sh
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genoffset.c
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genoffset.sh
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imgact_aout.c
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imgact_binmisc.c
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imgact_elf.c
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imgact_elf32.c
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imgact_elf64.c
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imgact_shell.c
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init_main.c
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init_sysent.c
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kern_acct.c
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kern_alq.c
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kern_clock.c
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kern_clocksource.c
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kern_condvar.c
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kern_conf.c
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kern_cons.c
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kern_context.c
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kern_cpu.c
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kern_cpuset.c
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kern_ctf.c
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kern_descrip.c
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kern_dtrace.c
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kern_dump.c
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kern_environment.c
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kern_et.c
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kern_event.c
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kern_exec.c
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kern_exit.c
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kern_fail.c
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kern_ffclock.c
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kern_fork.c
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kern_hhook.c
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kern_idle.c
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kern_intr.c
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kern_jail.c
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kern_kcov.c
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kern_khelp.c
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kern_kthread.c
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kern_ktr.c
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kern_ktrace.c
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kern_linker.c
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kern_lock.c
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kern_lockf.c
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kern_lockstat.c
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kern_loginclass.c
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kern_malloc.c
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kern_mbuf.c
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kern_mib.c
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kern_module.c
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kern_mtxpool.c
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kern_mutex.c
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kern_ntptime.c
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kern_osd.c
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kern_physio.c
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kern_pmc.c
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kern_poll.c
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kern_priv.c
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kern_proc.c
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kern_procctl.c
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kern_prot.c
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kern_racct.c
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kern_rangelock.c
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kern_rctl.c
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kern_resource.c
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kern_rmlock.c
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kern_rwlock.c
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kern_sdt.c
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kern_sema.c
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kern_sendfile.c
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kern_sharedpage.c
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kern_shutdown.c
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kern_sig.c
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kern_switch.c
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kern_sx.c
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kern_synch.c
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kern_syscalls.c
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kern_sysctl.c
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kern_tc.c
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kern_thr.c
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kern_thread.c
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kern_time.c
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kern_timeout.c
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kern_tslog.c
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kern_ubsan.c
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kern_umtx.c
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kern_uuid.c
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kern_xxx.c
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ksched.c
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link_elf.c
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link_elf_obj.c
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linker_if.m
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makesyscalls.sh
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md4c.c
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md5c.c
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msi_if.m
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p1003_1b.c
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pic_if.m
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posix4_mib.c
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sched_4bsd.c
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sched_ule.c
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serdev_if.m
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stack_protector.c
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subr_acl_nfs4.c
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subr_acl_posix1e.c
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subr_atomic64.c
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subr_autoconf.c
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subr_blist.c
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subr_boot.c
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subr_bufring.c
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subr_bus.c
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subr_bus_dma.c
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subr_busdma_bufalloc.c
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subr_capability.c
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subr_clock.c
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subr_compressor.c
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subr_counter.c
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subr_coverage.c
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subr_csan.c
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subr_devmap.c
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subr_devstat.c
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subr_disk.c
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subr_dummy_vdso_tc.c
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subr_early.c
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subr_epoch.c
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subr_eventhandler.c
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subr_fattime.c
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subr_filter.c
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subr_firmware.c
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subr_gtaskqueue.c
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subr_hash.c
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subr_hints.c
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subr_intr.c
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subr_kdb.c
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subr_kobj.c
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subr_lock.c
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subr_log.c
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subr_mchain.c
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subr_module.c
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subr_msgbuf.c
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subr_param.c
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subr_pcpu.c
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subr_pctrie.c
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subr_physmem.c
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subr_pidctrl.c
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subr_power.c
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subr_prf.c
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subr_prng.c
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subr_prof.c
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subr_rangeset.c
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subr_rman.c
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subr_rtc.c
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subr_sbuf.c
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subr_scanf.c
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subr_sfbuf.c
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subr_sglist.c
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subr_sleepqueue.c
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subr_smp.c
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subr_smr.c
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subr_stack.c
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subr_stats.c
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subr_syscall.c
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subr_taskqueue.c
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subr_terminal.c
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subr_trap.c
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subr_turnstile.c
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subr_uio.c
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subr_unit.c
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subr_vmem.c
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subr_witness.c
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sys_capability.c
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sys_eventfd.c
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sys_generic.c
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sys_getrandom.c
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sys_pipe.c
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sys_procdesc.c
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sys_process.c
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sys_socket.c
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syscalls.c
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syscalls.master
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systrace_args.c
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sysv_ipc.c
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sysv_msg.c
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sysv_sem.c
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sysv_shm.c
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tty.c
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tty_compat.c
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tty_info.c
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tty_inq.c
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tty_outq.c
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tty_pts.c
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tty_tty.c
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tty_ttydisc.c
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uipc_accf.c
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uipc_debug.c
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uipc_domain.c
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uipc_ktls.c
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uipc_mbuf.c
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uipc_mbuf2.c
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uipc_mbufhash.c
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uipc_mqueue.c
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uipc_sem.c
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uipc_shm.c
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uipc_sockbuf.c
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uipc_socket.c
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uipc_syscalls.c
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uipc_usrreq.c
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vfs_acl.c
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vfs_aio.c
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vfs_bio.c
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vfs_cache.c
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vfs_cluster.c
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vfs_default.c
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vfs_export.c
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vfs_extattr.c
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vfs_hash.c
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vfs_init.c
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vfs_lookup.c
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vfs_mount.c
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vfs_mountroot.c
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vfs_subr.c
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vfs_syscalls.c
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vfs_vnops.c
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vnode_if.src
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Editing: subr_pcpu.c
/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2001 Wind River Systems, Inc. * All rights reserved. * Written by: John Baldwin <jhb@FreeBSD.org> * * Copyright (c) 2009 Jeffrey Roberson <jeff@freebsd.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * This module provides MI support for per-cpu data. * * Each architecture determines the mapping of logical CPU IDs to physical * CPUs. The requirements of this mapping are as follows: * - Logical CPU IDs must reside in the range 0 ... MAXCPU - 1. * - The mapping is not required to be dense. That is, there may be * gaps in the mappings. * - The platform sets the value of MAXCPU in <machine/param.h>. * - It is suggested, but not required, that in the non-SMP case, the * platform define MAXCPU to be 1 and define the logical ID of the * sole CPU as 0. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include <sys/param.h> #include <sys/systm.h> #include <sys/sysctl.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/pcpu.h> #include <sys/proc.h> #include <sys/smp.h> #include <sys/sx.h> #include <vm/uma.h> #include <ddb/ddb.h> static MALLOC_DEFINE(M_PCPU, "Per-cpu", "Per-cpu resource accouting."); struct dpcpu_free { uintptr_t df_start; int df_len; TAILQ_ENTRY(dpcpu_free) df_link; }; DPCPU_DEFINE_STATIC(char, modspace[DPCPU_MODMIN] __aligned(__alignof(void *))); static TAILQ_HEAD(, dpcpu_free) dpcpu_head = TAILQ_HEAD_INITIALIZER(dpcpu_head); static struct sx dpcpu_lock; uintptr_t dpcpu_off[MAXCPU]; struct pcpu *cpuid_to_pcpu[MAXCPU]; struct cpuhead cpuhead = STAILQ_HEAD_INITIALIZER(cpuhead); /* * Initialize the MI portions of a struct pcpu. */ void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) { bzero(pcpu, size); KASSERT(cpuid >= 0 && cpuid < MAXCPU, ("pcpu_init: invalid cpuid %d", cpuid)); pcpu->pc_cpuid = cpuid; cpuid_to_pcpu[cpuid] = pcpu; STAILQ_INSERT_TAIL(&cpuhead, pcpu, pc_allcpu); cpu_pcpu_init(pcpu, cpuid, size); pcpu->pc_rm_queue.rmq_next = &pcpu->pc_rm_queue; pcpu->pc_rm_queue.rmq_prev = &pcpu->pc_rm_queue; pcpu->pc_zpcpu_offset = zpcpu_offset_cpu(cpuid); } void dpcpu_init(void *dpcpu, int cpuid) { struct pcpu *pcpu; pcpu = pcpu_find(cpuid); pcpu->pc_dynamic = (uintptr_t)dpcpu - DPCPU_START; /* * Initialize defaults from our linker section. */ memcpy(dpcpu, (void *)DPCPU_START, DPCPU_BYTES); /* * Place it in the global pcpu offset array. */ dpcpu_off[cpuid] = pcpu->pc_dynamic; } static void dpcpu_startup(void *dummy __unused) { struct dpcpu_free *df; df = malloc(sizeof(*df), M_PCPU, M_WAITOK | M_ZERO); df->df_start = (uintptr_t)&DPCPU_NAME(modspace); df->df_len = DPCPU_MODMIN; TAILQ_INSERT_HEAD(&dpcpu_head, df, df_link); sx_init(&dpcpu_lock, "dpcpu alloc lock"); } SYSINIT(dpcpu, SI_SUB_KLD, SI_ORDER_FIRST, dpcpu_startup, NULL); /* * UMA_ZONE_PCPU zones for general kernel use. */ uma_zone_t pcpu_zone_4; uma_zone_t pcpu_zone_8; uma_zone_t pcpu_zone_16; uma_zone_t pcpu_zone_32; uma_zone_t pcpu_zone_64; static void pcpu_zones_startup(void) { pcpu_zone_4 = uma_zcreate("pcpu-4", 4, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_PCPU); pcpu_zone_8 = uma_zcreate("pcpu-8", 8, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_PCPU); pcpu_zone_16 = uma_zcreate("pcpu-16", 16, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_PCPU); pcpu_zone_32 = uma_zcreate("pcpu-32", 32, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_PCPU); pcpu_zone_64 = uma_zcreate("pcpu-64", 64, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_PCPU); } SYSINIT(pcpu_zones, SI_SUB_COUNTER, SI_ORDER_FIRST, pcpu_zones_startup, NULL); /* * First-fit extent based allocator for allocating space in the per-cpu * region reserved for modules. This is only intended for use by the * kernel linkers to place module linker sets. */ void * dpcpu_alloc(int size) { struct dpcpu_free *df; void *s; s = NULL; size = roundup2(size, sizeof(void *)); sx_xlock(&dpcpu_lock); TAILQ_FOREACH(df, &dpcpu_head, df_link) { if (df->df_len < size) continue; if (df->df_len == size) { s = (void *)df->df_start; TAILQ_REMOVE(&dpcpu_head, df, df_link); free(df, M_PCPU); break; } s = (void *)df->df_start; df->df_len -= size; df->df_start = df->df_start + size; break; } sx_xunlock(&dpcpu_lock); return (s); } /* * Free dynamic per-cpu space at module unload time. */ void dpcpu_free(void *s, int size) { struct dpcpu_free *df; struct dpcpu_free *dn; uintptr_t start; uintptr_t end; size = roundup2(size, sizeof(void *)); start = (uintptr_t)s; end = start + size; /* * Free a region of space and merge it with as many neighbors as * possible. Keeping the list sorted simplifies this operation. */ sx_xlock(&dpcpu_lock); TAILQ_FOREACH(df, &dpcpu_head, df_link) { if (df->df_start > end) break; /* * If we expand at the end of an entry we may have to * merge it with the one following it as well. */ if (df->df_start + df->df_len == start) { df->df_len += size; dn = TAILQ_NEXT(df, df_link); if (df->df_start + df->df_len == dn->df_start) { df->df_len += dn->df_len; TAILQ_REMOVE(&dpcpu_head, dn, df_link); free(dn, M_PCPU); } sx_xunlock(&dpcpu_lock); return; } if (df->df_start == end) { df->df_start = start; df->df_len += size; sx_xunlock(&dpcpu_lock); return; } } dn = malloc(sizeof(*df), M_PCPU, M_WAITOK | M_ZERO); dn->df_start = start; dn->df_len = size; if (df) TAILQ_INSERT_BEFORE(df, dn, df_link); else TAILQ_INSERT_TAIL(&dpcpu_head, dn, df_link); sx_xunlock(&dpcpu_lock); } /* * Initialize the per-cpu storage from an updated linker-set region. */ void dpcpu_copy(void *s, int size) { #ifdef SMP uintptr_t dpcpu; int i; CPU_FOREACH(i) { dpcpu = dpcpu_off[i]; if (dpcpu == 0) continue; memcpy((void *)(dpcpu + (uintptr_t)s), s, size); } #else memcpy((void *)(dpcpu_off[0] + (uintptr_t)s), s, size); #endif } /* * Destroy a struct pcpu. */ void pcpu_destroy(struct pcpu *pcpu) { STAILQ_REMOVE(&cpuhead, pcpu, pcpu, pc_allcpu); cpuid_to_pcpu[pcpu->pc_cpuid] = NULL; dpcpu_off[pcpu->pc_cpuid] = 0; } /* * Locate a struct pcpu by cpu id. */ struct pcpu * pcpu_find(u_int cpuid) { return (cpuid_to_pcpu[cpuid]); } int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS) { uintptr_t dpcpu; int64_t count; int i; count = 0; CPU_FOREACH(i) { dpcpu = dpcpu_off[i]; if (dpcpu == 0) continue; count += *(int64_t *)(dpcpu + (uintptr_t)arg1); } return (SYSCTL_OUT(req, &count, sizeof(count))); } int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS) { uintptr_t dpcpu; long count; int i; count = 0; CPU_FOREACH(i) { dpcpu = dpcpu_off[i]; if (dpcpu == 0) continue; count += *(long *)(dpcpu + (uintptr_t)arg1); } return (SYSCTL_OUT(req, &count, sizeof(count))); } int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS) { uintptr_t dpcpu; int count; int i; count = 0; CPU_FOREACH(i) { dpcpu = dpcpu_off[i]; if (dpcpu == 0) continue; count += *(int *)(dpcpu + (uintptr_t)arg1); } return (SYSCTL_OUT(req, &count, sizeof(count))); } #ifdef DDB DB_SHOW_COMMAND(dpcpu_off, db_show_dpcpu_off) { int id; CPU_FOREACH(id) { db_printf("dpcpu_off[%2d] = 0x%jx (+ DPCPU_START = %p)\n", id, (uintmax_t)dpcpu_off[id], (void *)(uintptr_t)(dpcpu_off[id] + DPCPU_START)); } } static void show_pcpu(struct pcpu *pc) { struct thread *td; db_printf("cpuid = %d\n", pc->pc_cpuid); db_printf("dynamic pcpu = %p\n", (void *)pc->pc_dynamic); db_printf("curthread = "); td = pc->pc_curthread; if (td != NULL) db_printf("%p: pid %d tid %d critnest %d \"%s\"\n", td, td->td_proc->p_pid, td->td_tid, td->td_critnest, td->td_name); else db_printf("none\n"); db_printf("curpcb = %p\n", pc->pc_curpcb); db_printf("fpcurthread = "); td = pc->pc_fpcurthread; if (td != NULL) db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid, td->td_name); else db_printf("none\n"); db_printf("idlethread = "); td = pc->pc_idlethread; if (td != NULL) db_printf("%p: tid %d \"%s\"\n", td, td->td_tid, td->td_name); else db_printf("none\n"); db_show_mdpcpu(pc); #ifdef VIMAGE db_printf("curvnet = %p\n", pc->pc_curthread->td_vnet); #endif #ifdef WITNESS db_printf("spin locks held:\n"); witness_list_locks(&pc->pc_spinlocks, db_printf); #endif } DB_SHOW_COMMAND(pcpu, db_show_pcpu) { struct pcpu *pc; int id; if (have_addr) id = ((addr >> 4) % 16) * 10 + (addr % 16); else id = PCPU_GET(cpuid); pc = pcpu_find(id); if (pc == NULL) { db_printf("CPU %d not found\n", id); return; } show_pcpu(pc); } DB_SHOW_ALL_COMMAND(pcpu, db_show_cpu_all) { struct pcpu *pc; int id; db_printf("Current CPU: %d\n\n", PCPU_GET(cpuid)); CPU_FOREACH(id) { pc = pcpu_find(id); if (pc != NULL) { show_pcpu(pc); db_printf("\n"); } } } DB_SHOW_ALIAS(allpcpu, db_show_cpu_all); #endif
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