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Don't enable interrupts in init_secondary().

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The MI kernel assumes that interrupts will not be enabled on APs until
after the first context switch.  In particular, the problem was causing
occasional deadlocks during boot.

Remove an unneeded intr_disable() added in r335005.

Reviewed by:	jhb (previous version)
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18738
This commit is contained in:
markj 2019-01-04 17:14:50 +00:00
parent 6412bdfc1b
commit 427302a412
1 changed files with 0 additions and 4 deletions
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4
sys/riscv/riscv/mp_machdep.c
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@ -227,7 +227,6 @@ init_secondary(uint64_t cpu)
__asm __volatile("mv gp, %0" :: "r"(pcpup));
/* Workaround: make sure wfi doesn't halt the hart */
intr_disable();
csr_set(sie, SIE_SSIE);
csr_set(sip, SIE_SSIE);
@ -253,9 +252,6 @@ init_secondary(uint64_t cpu)
/* Start per-CPU event timers. */
cpu_initclocks_ap();
/* Enable interrupts */
intr_enable();
/* Enable external (PLIC) interrupts */
csr_set(sie, SIE_SEIE);