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| author | Isaku Yamahata <yamahata@valinux.co.jp> | 2008-04-02 10:53:56 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:57:32 +0200 |
| commit | e849c3e9e0b786619c451d89ef0c47ac9a28fbc1 (patch) | |
| tree | bc3500d40095c2f868e2efca4918b73a6b0a1090 | |
| parent | e04d0d0767a9c272d3c7300fb7a5221c5e3a71eb (diff) | |
| download | linux-e849c3e9e0b786619c451d89ef0c47ac9a28fbc1.tar.bz2 | |
Xen: make events.c portable for ia64/xen support
Remove x86 dependency in drivers/xen/events.c for ia64/xen support
introducing include/asm/xen/events.h.
Introduce xen_irqs_disabled() to hide regs->flags
Introduce xen_do_IRQ() to hide regs->orig_ax.
make enum ipi_vector definition arch specific. ia64/xen needs four vectors.
Add one rmb() because on ia64 xchg() isn't barrier.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | drivers/xen/events.c | 13 | ||||
| -rw-r--r-- | include/asm-x86/xen/events.h | 22 | ||||
| -rw-r--r-- | include/xen/events.h | 8 |
3 files changed, 30 insertions, 13 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index c50d499b1e6f..2396b4492f70 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -469,7 +469,7 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id) for_each_online_cpu(i) { struct vcpu_info *v = per_cpu(xen_vcpu, i); printk("%d: masked=%d pending=%d event_sel %08lx\n ", i, - (get_irq_regs() && i == cpu) ? !(get_irq_regs()->flags & X86_EFLAGS_IF) : v->evtchn_upcall_mask, + (get_irq_regs() && i == cpu) ? xen_irqs_disabled(get_irq_regs()) : v->evtchn_upcall_mask, v->evtchn_upcall_pending, v->evtchn_pending_sel); } @@ -527,7 +527,10 @@ void xen_evtchn_do_upcall(struct pt_regs *regs) if (__get_cpu_var(nesting_count)++) goto out; - /* NB. No need for a barrier here -- XCHG is a barrier on x86. */ +#ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */ + /* Clear master flag /before/ clearing selector flag. */ + rmb(); +#endif pending_words = xchg(&vcpu_info->evtchn_pending_sel, 0); while (pending_words != 0) { unsigned long pending_bits; @@ -539,10 +542,8 @@ void xen_evtchn_do_upcall(struct pt_regs *regs) int port = (word_idx * BITS_PER_LONG) + bit_idx; int irq = evtchn_to_irq[port]; - if (irq != -1) { - regs->orig_ax = ~irq; - do_IRQ(regs); - } + if (irq != -1) + xen_do_IRQ(irq, regs); } } diff --git a/include/asm-x86/xen/events.h b/include/asm-x86/xen/events.h new file mode 100644 index 000000000000..596312a7bfc9 --- /dev/null +++ b/include/asm-x86/xen/events.h @@ -0,0 +1,22 @@ +#ifndef __XEN_EVENTS_H +#define __XEN_EVENTS_H + +enum ipi_vector { + XEN_RESCHEDULE_VECTOR, + XEN_CALL_FUNCTION_VECTOR, + + XEN_NR_IPIS, +}; + +static inline int xen_irqs_disabled(struct pt_regs *regs) +{ + return raw_irqs_disabled_flags(regs->flags); +} + +static inline void xen_do_IRQ(int irq, struct pt_regs *regs) +{ + regs->orig_ax = ~irq; + do_IRQ(regs); +} + +#endif /* __XEN_EVENTS_H */ diff --git a/include/xen/events.h b/include/xen/events.h index 2bde54d29be5..d99a3e0df880 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -5,13 +5,7 @@ #include <xen/interface/event_channel.h> #include <asm/xen/hypercall.h> - -enum ipi_vector { - XEN_RESCHEDULE_VECTOR, - XEN_CALL_FUNCTION_VECTOR, - - XEN_NR_IPIS, -}; +#include <asm/xen/events.h> int bind_evtchn_to_irq(unsigned int evtchn); int bind_evtchn_to_irqhandler(unsigned int evtchn, |