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authorAshok Raj <ashok.raj@intel.com>2005-06-25 17:55:00 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 19:24:30 -0400
commit76e4f660d9f4c6d1bb473f72be2988c35eaca948 (patch)
tree3a0b3ae0cc12d6f0d96bf1f3b564f8470e0f72ae /include/asm-x86_64
parente6982c671c560da4a0bc5c908cbcbec12bd5991d (diff)
[PATCH] x86_64: CPU hotplug support
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>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/irq.h5
-rw-r--r--include/asm-x86_64/smp.h2
2 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-x86_64/irq.h b/include/asm-x86_64/irq.h
index 3af50b3c3b05..eb3b7aa9eb9f 100644
--- a/include/asm-x86_64/irq.h
+++ b/include/asm-x86_64/irq.h
@@ -52,4 +52,9 @@ struct irqaction;
52struct pt_regs; 52struct pt_regs;
53int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); 53int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
54 54
55#ifdef CONFIG_HOTPLUG_CPU
56#include <linux/cpumask.h>
57extern void fixup_irqs(cpumask_t map);
58#endif
59
55#endif /* _ASM_IRQ_H */ 60#endif /* _ASM_IRQ_H */
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h
index a7425aa5a3b7..9c6242fb99db 100644
--- a/include/asm-x86_64/smp.h
+++ b/include/asm-x86_64/smp.h
@@ -77,6 +77,8 @@ extern __inline int hard_smp_processor_id(void)
77} 77}
78 78
79extern int safe_smp_processor_id(void); 79extern int safe_smp_processor_id(void);
80extern int __cpu_disable(void);
81extern void __cpu_die(unsigned int cpu);
80 82
81#endif /* !ASSEMBLY */ 83#endif /* !ASSEMBLY */
82 84