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Per the OSDev Wiki, Pentium Pro and later[1]: > For newer CPUs (P6, Pentium 4) one SIPI is enough, but I'm not sure if older Intel CPUs (Pentium) or CPUs from
by mananaysiempre 4y ago
Per the OSDev Wiki, Pentium Pro and later[1]:
> For newer CPUs (P6, Pentium 4) one SIPI is enough, but I'm not sure if older Intel CPUs (Pentium) or CPUs from other manufacturers need a second SIPI or not.
When (and if) that became officially sanctioned behaviour is another question.
[1] https://wiki.osdev.org/Symmetric_Multiprocessing#Initialisation_of_an_old_SMP_system https://wiki.osdev.org/Symmetric_Multiprocessing#Initialisat...