diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-06 14:09:43 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-09 12:17:30 +0100 |
| commit | 792dc4f6cdacf50d3f2b93756d282fc04ee34bd5 (patch) | |
| tree | c65e8bc1324e5ba62b268bcd1fbe1b4b90342ecd /arch/x86 | |
| parent | eca217b36e5d7d4377493d5cedd89105e66a5a72 (diff) | |
xen: use our own eventchannel->irq path
Rather than overloading vectors for event channels, take full
responsibility for mapping an event channel to irq directly. With
this patch Xen has its own irq allocator.
When the kernel gets an event channel upcall, it maps the event
channel number to an irq and injects it into the normal interrupt
path.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/xen/events.h | 6 | ||||
| -rw-r--r-- | arch/x86/xen/irq.c | 17 |
2 files changed, 1 insertions, 22 deletions
diff --git a/arch/x86/include/asm/xen/events.h b/arch/x86/include/asm/xen/events.h index 19144184983..1df35417c41 100644 --- a/arch/x86/include/asm/xen/events.h +++ b/arch/x86/include/asm/xen/events.h @@ -15,10 +15,4 @@ 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 /* _ASM_X86_XEN_EVENTS_H */ diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c index 5a070900ad3..cfd17799bd6 100644 --- a/arch/x86/xen/irq.c +++ b/arch/x86/xen/irq.c @@ -19,21 +19,6 @@ void xen_force_evtchn_callback(void) (void)HYPERVISOR_xen_version(0, NULL); } -static void __init __xen_init_IRQ(void) -{ - int i; - - /* Create identity vector->irq map */ - for(i = 0; i < NR_VECTORS; i++) { - int cpu; - - for_each_possible_cpu(cpu) - per_cpu(vector_irq, cpu)[i] = i; - } - - xen_init_IRQ(); -} - static unsigned long xen_save_fl(void) { struct vcpu_info *vcpu; @@ -127,7 +112,7 @@ static void xen_halt(void) } static const struct pv_irq_ops xen_irq_ops __initdata = { - .init_IRQ = __xen_init_IRQ, + .init_IRQ = xen_init_IRQ, .save_fl = PV_CALLEE_SAVE(xen_save_fl), .restore_fl = PV_CALLEE_SAVE(xen_restore_fl), |