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RISC-V: Support EARLY_AP_STARTUP

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The EARLY_AP_STARTUP option initializes non-boot processors
much sooner during startup. This adds support for this option
on RISC-V and enables it by default for GENERIC.

Reviewed by:	jhb, markj
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D21661
This commit is contained in:
Mitchell Horne 2019-09-16 22:17:16 +00:00
parent 4cace859c2
commit b698d9178d
3 changed files with 27 additions and 0 deletions
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1
sys/riscv/conf/GENERIC
View file

@ -71,6 +71,7 @@ options RACCT # Resource accounting framework
options RACCT_DEFAULT_TO_DISABLED # Set kern.racct.enable=0 by default
options RCTL # Resource limits
options SMP
options EARLY_AP_STARTUP
options INTRNG
# RISC-V SBI console

24
sys/riscv/riscv/clock.c
View file

@ -37,10 +37,34 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/smp.h>
void
cpu_initclocks(void)
{
#ifdef EARLY_AP_STARTUP
struct thread *td;
int i;
td = curthread;
cpu_initclocks_bsp();
CPU_FOREACH(i) {
if (i == 0)
continue;
thread_lock(td);
sched_bind(td, i);
thread_unlock(td);
cpu_initclocks_ap();
}
thread_lock(td);
if (sched_is_bound(td))
sched_unbind(td);
thread_unlock(td);
#else
cpu_initclocks_bsp();
#endif
}

2
sys/riscv/riscv/mp_machdep.c
View file

@ -257,8 +257,10 @@ init_secondary(uint64_t hart)
/* Enable software interrupts */
riscv_unmask_ipi();
#ifndef EARLY_AP_STARTUP
/* Start per-CPU event timers. */
cpu_initclocks_ap();
#endif
/* Enable external (PLIC) interrupts */
csr_set(sie, SIE_SEIE);