提交 fe4024dc 编写于 作者: C Cyrill Gorcunov 提交者: Ingo Molnar

x86: apic - unify lapic_shutdown

Signed-off-by: NCyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 990b183e
......@@ -838,10 +838,13 @@ void lapic_shutdown(void)
local_irq_save(flags);
if (enabled_via_apicbase)
disable_local_APIC();
else
#ifdef CONFIG_X86_32
if (!enabled_via_apicbase)
clear_local_APIC();
else
#endif
disable_local_APIC();
local_irq_restore(flags);
}
......
......@@ -707,6 +707,12 @@ void disable_local_APIC(void)
#endif
}
/*
* If Linux enabled the LAPIC against the BIOS default disable it down before
* re-entering the BIOS on shutdown. Otherwise the BIOS may get confused and
* not power-off. Additionally clear all LVT entries before disable_local_APIC
* for the case where Linux didn't enable the LAPIC.
*/
void lapic_shutdown(void)
{
unsigned long flags;
......@@ -716,7 +722,13 @@ void lapic_shutdown(void)
local_irq_save(flags);
disable_local_APIC();
#ifdef CONFIG_X86_32
if (!enabled_via_apicbase)
clear_local_APIC();
else
#endif
disable_local_APIC();
local_irq_restore(flags);
}
......
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