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-rw-r--r--arch/x86/kernel/acpi/boot.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index d37593c2f438..7678f10c4568 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -973,6 +973,29 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
973 nr_ioapics++; 973 nr_ioapics++;
974} 974}
975 975
976int __init acpi_probe_gsi(void)
977{
978 int idx;
979 int gsi;
980 int max_gsi = 0;
981
982 if (acpi_disabled)
983 return 0;
984
985 if (!acpi_ioapic)
986 return 0;
987
988 max_gsi = 0;
989 for (idx = 0; idx < nr_ioapics; idx++) {
990 gsi = mp_ioapic_routing[idx].gsi_end;
991
992 if (gsi > max_gsi)
993 max_gsi = gsi;
994 }
995
996 return max_gsi + 1;
997}
998
976static void assign_to_mp_irq(struct mp_config_intsrc *m, 999static void assign_to_mp_irq(struct mp_config_intsrc *m,
977 struct mp_config_intsrc *mp_irq) 1000 struct mp_config_intsrc *mp_irq)
978{ 1001{