mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 02:34:01 +08:00
76e4f660d9
Experimental CPU hotplug patch for x86_64 ----------------------------------------- This supports logical CPU online and offline. - Test with maxcpus=1, and then kick other cpu's off to test if init code is all cleaned up. CONFIG_SCHED_SMT works as well. - idle threads are forked on demand from keventd threads for clean startup TBD: 1. Not tested on a real NUMA machine (tested with numa=fake=2) 2. Handle ACPI pieces for physical hotplug support. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Andi Kleen <ak@muc.de> Acked-by: Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by: Shaohua.li<shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
#ifndef _ASM_IRQ_H
|
|
#define _ASM_IRQ_H
|
|
|
|
/*
|
|
* linux/include/asm/irq.h
|
|
*
|
|
* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
|
|
*
|
|
* IRQ/IPI changes taken from work by Thomas Radke
|
|
* <tomsoft@informatik.tu-chemnitz.de>
|
|
*/
|
|
|
|
#define TIMER_IRQ 0
|
|
|
|
/*
|
|
* 16 8259A IRQ's, 208 potential APIC interrupt sources.
|
|
* Right now the APIC is mostly only used for SMP.
|
|
* 256 vectors is an architectural limit. (we can have
|
|
* more than 256 devices theoretically, but they will
|
|
* have to use shared interrupts)
|
|
* Since vectors 0x00-0x1f are used/reserved for the CPU,
|
|
* the usable vector space is 0x20-0xff (224 vectors)
|
|
*/
|
|
|
|
/*
|
|
* The maximum number of vectors supported by x86_64 processors
|
|
* is limited to 256. For processors other than x86_64, NR_VECTORS
|
|
* should be changed accordingly.
|
|
*/
|
|
#define NR_VECTORS 256
|
|
|
|
#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
#define NR_IRQS FIRST_SYSTEM_VECTOR
|
|
#define NR_IRQ_VECTORS NR_IRQS
|
|
#else
|
|
#define NR_IRQS 224
|
|
#define NR_IRQ_VECTORS 1024
|
|
#endif
|
|
|
|
static __inline__ int irq_canonicalize(int irq)
|
|
{
|
|
return ((irq == 2) ? 9 : irq);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_LOCAL_APIC
|
|
#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
|
|
#endif
|
|
|
|
struct irqaction;
|
|
struct pt_regs;
|
|
int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
#include <linux/cpumask.h>
|
|
extern void fixup_irqs(cpumask_t map);
|
|
#endif
|
|
|
|
#endif /* _ASM_IRQ_H */
|