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| author |   Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-02-12 17:22:49 -0800 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-10-18 10:40:30 -0400 |
| commit | 7b586d71858091f0958e5808b7e3d5390c2ae47d (patch) | |
| tree | 6184c500731aad975103d8c87c5ee9ed18977040 | |
| parent | xen: implement pirq type event channels (diff) | |
| download | linux-dev-7b586d71858091f0958e5808b7e3d5390c2ae47d.tar.xz linux-dev-7b586d71858091f0958e5808b7e3d5390c2ae47d.zip | |
x86/io_apic: add get_nr_irqs_gsi()
Impact: new interface to get max GSI
Add get_nr_irqs_gsi() to return nr_irqs_gsi. Xen will use this to
determine how many irqs it needs to reserve for hardware irqs.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | arch/x86/include/asm/io_apic.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h index c8be4566c3d2..a6b28d017c2f 100644 --- a/arch/x86/include/asm/io_apic.h +++ b/arch/x86/include/asm/io_apic.h @@ -169,6 +169,7 @@ extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries); extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries); extern void probe_nr_irqs_gsi(void); +extern int get_nr_irqs_gsi(void); extern void setup_ioapic_ids_from_mpc(void); diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 20e47e045395..44bb914a42b2 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -3649,6 +3649,11 @@ void __init probe_nr_irqs_gsi(void) printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi); } +int get_nr_irqs_gsi(void) +{ + return nr_irqs_gsi; +} + #ifdef CONFIG_SPARSE_IRQ int __init arch_probe_nr_irqs(void) { |