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Diffstat (limited to 'arch/x86_64/kernel/mpparse.c')
-rw-r--r--arch/x86_64/kernel/mpparse.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c
index 61ae57eb9e4..8bf0ca03ac8 100644
--- a/arch/x86_64/kernel/mpparse.c
+++ b/arch/x86_64/kernel/mpparse.c
@@ -32,7 +32,6 @@
/* Have we found an MP table */
int smp_found_config;
-unsigned int __initdata maxcpus = NR_CPUS;
/*
* Various Linux-internal data structures created from the
@@ -649,6 +648,20 @@ static int mp_find_ioapic(int gsi)
return -1;
}
+static u8 uniq_ioapic_id(u8 id)
+{
+ int i;
+ DECLARE_BITMAP(used, 256);
+ bitmap_zero(used, 256);
+ for (i = 0; i < nr_ioapics; i++) {
+ struct mpc_config_ioapic *ia = &mp_ioapics[i];
+ __set_bit(ia->mpc_apicid, used);
+ }
+ if (!test_bit(id, used))
+ return id;
+ return find_first_zero_bit(used, 256);
+}
+
void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
{
int idx = 0;
@@ -656,14 +669,14 @@ void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
if (bad_ioapic(address))
return;
- idx = nr_ioapics++;
+ idx = nr_ioapics;
mp_ioapics[idx].mpc_type = MP_IOAPIC;
mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
mp_ioapics[idx].mpc_apicaddr = address;
set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
- mp_ioapics[idx].mpc_apicid = id;
+ mp_ioapics[idx].mpc_apicid = uniq_ioapic_id(id);
mp_ioapics[idx].mpc_apicver = 0;
/*
@@ -680,6 +693,8 @@ void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
mp_ioapics[idx].mpc_apicaddr,
mp_ioapic_routing[idx].gsi_start,
mp_ioapic_routing[idx].gsi_end);
+
+ nr_ioapics++;
}
void __init