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>
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index c8be456..a6b28d0 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -169,6 +169,7 @@
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);