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smp: fix race between cpu exposure and smp init

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The SMP code exposes that a cpu woke up before it is properly
initialized in sched_ap_entry(). Fix this by initializing it first,
exposing it and then stopping the bootstrap thread.
This commit is contained in:
Matheus
2026-10-06 10:26:56 -03:00
parent 1ed159489d
commit 0cdd03eba8
2 changed files with 4 additions and 2 deletions
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kernel-src/arch/x86-64/smp.c
+4 -1
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@@ -50,8 +50,11 @@ static void cpuwakeup(struct limine_mp_info *info) {
arch_profiling_init();
#endif
__atomic_add_fetch(&arch_smp_cpusawake, 1, __ATOMIC_SEQ_CST);
sched_ap_entry();
__atomic_add_fetch(&arch_smp_cpusawake, 1, __ATOMIC_SEQ_CST);
sched_stop_current_thread();
}
void arch_smp_send_ipi(cpu_t *targcpu, isr_t *isr, int target, bool nmi) {