Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\apic\io_apic.c Create Date:2022-07-28 08:29:23
Last Modify:2020-03-16 21:24:45 Copyright©Brick
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Name:When we mask an IO APIC routing entry, we need to write the low* word first, in order to set the mask bit before we change the* high bits!

Proto:static void ioapic_mask_entry(int apic, int pin)

Type:void

Parameter:

TypeParameterName
intapic
intpin
361  union entry_union eu = { 0: enabled, 1: disabled = IOAPIC_MASKED}
363  raw_spin_lock_irqsave( & ioapic_lock, flags)
364  io_apic_write(apic, 0x10 + 2 * pin, w1)
365  io_apic_write(apic, 0x11 + 2 * pin, w2)
366  raw_spin_unlock_irqrestore( & ioapic_lock, flags)
Caller
NameDescribe
clear_IO_APIC_pin
mp_irqdomain_deactivate