From 8893166ff8694f36655009aa9bf8e7f2e1c9339f Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Sat, 5 Nov 2005 17:25:54 +0100 Subject: [PATCH] x86_64: Increase the maximum number of local APICs to the maximum This is needed for large multinode IBM systems which have a sparse APIC space in clustered mode, fully covering the available 8 bits. The previous kernels would limit the local APIC number to 127, which caused it to reject some of the CPUs at boot. I increased the maximum and shrunk the apic_version array a bit to make up for that (the version is only 8 bit, so don't need an full int to store) Cc: Chris McDermott Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/kernel/mpparse.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'arch/x86_64') diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c index 1d61f10a92c..1105250bf02 100644 --- a/arch/x86_64/kernel/mpparse.c +++ b/arch/x86_64/kernel/mpparse.c @@ -42,7 +42,7 @@ int acpi_found_madt; * Various Linux-internal data structures created from the * MP-table. */ -int apic_version [MAX_APICS]; +unsigned char apic_version [MAX_APICS]; unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 }; int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 }; @@ -108,7 +108,8 @@ static int __init mpf_checksum(unsigned char *mp, int len) static void __init MP_processor_info (struct mpc_config_processor *m) { - int ver, cpu; + int cpu; + unsigned char ver; static int found_bsp=0; if (!(m->mpc_cpuflag & CPU_ENABLED)) { @@ -133,12 +134,14 @@ static void __init MP_processor_info (struct mpc_config_processor *m) } cpu = num_processors++; - - if (m->mpc_apicid > MAX_APICS) { + +#if MAX_APICS < 255 + if ((int)m->mpc_apicid > MAX_APICS) { printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n", m->mpc_apicid, MAX_APICS); return; } +#endif ver = m->mpc_apicver; physid_set(m->mpc_apicid, phys_cpu_present_map); -- cgit v1.2.3