54d5d42404
When handling writes to /proc/irq, current code is re-programming rte entries directly. This is not recommended and could potentially cause chipset's to lockup, or cause missing interrupts. CONFIG_IRQ_BALANCE does this correctly, where it re-programs only when the interrupt is pending. The same needs to be done for /proc/irq handling as well. Otherwise user space irq balancers are really not doing the right thing. - Changed pending_irq_balance_cpumask to pending_irq_migrate_cpumask for lack of a generic name. - added move_irq out of IRQ_BALANCE, and added this same to X86_64 - Added new proc handler for write, so we can do deferred write at irq handling time. - Display of /proc/irq/XX/smp_affinity used to display CPU_MASKALL, instead it now shows only active cpu masks, or exactly what was set. - Provided a common move_irq implementation, instead of duplicating when using generic irq framework. Tested on i386/x86_64 and ia64 with CONFIG_PCI_MSI turned on and off. Tested UP builds as well. MSI testing: tbd: I have cards, need to look for a x-over cable, although I did test an earlier version of this patch. Will test in a couple days. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Zwane Mwaikambo <zwane@holomorphy.com> Grudgingly-acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
#ifndef _ASM_IA64_IRQ_H
|
|
#define _ASM_IA64_IRQ_H
|
|
|
|
/*
|
|
* Copyright (C) 1999-2000, 2002 Hewlett-Packard Co
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
|
* Stephane Eranian <eranian@hpl.hp.com>
|
|
*
|
|
* 11/24/98 S.Eranian updated TIMER_IRQ and irq_canonicalize
|
|
* 01/20/99 S.Eranian added keyboard interrupt
|
|
* 02/29/00 D.Mosberger moved most things into hw_irq.h
|
|
*/
|
|
|
|
#define NR_IRQS 256
|
|
#define NR_IRQ_VECTORS NR_IRQS
|
|
|
|
static __inline__ int
|
|
irq_canonicalize (int irq)
|
|
{
|
|
/*
|
|
* We do the legacy thing here of pretending that irqs < 16
|
|
* are 8259 irqs. This really shouldn't be necessary at all,
|
|
* but we keep it here as serial.c still uses it...
|
|
*/
|
|
return ((irq == 2) ? 9 : irq);
|
|
}
|
|
|
|
extern void disable_irq (unsigned int);
|
|
extern void disable_irq_nosync (unsigned int);
|
|
extern void enable_irq (unsigned int);
|
|
extern void set_irq_affinity_info (unsigned int irq, int dest, int redir);
|
|
|
|
struct irqaction;
|
|
struct pt_regs;
|
|
int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
|
|
|
|
#endif /* _ASM_IA64_IRQ_H */
|