diff options
| author | Andi Kleen <ak@suse.de> | 2005-11-05 19:25:54 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-15 06:55:17 +0300 |
| commit | 8893166ff8694f36655009aa9bf8e7f2e1c9339f (patch) | |
| tree | 89f030c84d807f58444667a401194cda06fcc1b0 | |
| parent | 9e43e1b7c7c9872da032442d8e4bb112a02d16f4 (diff) | |
| download | linux-8893166ff8694f36655009aa9bf8e7f2e1c9339f.tar.xz | |
[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 <lcm@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/kernel/mpparse.c | 11 | ||||
| -rw-r--r-- | include/asm-x86_64/mpspec.h | 4 |
2 files changed, 9 insertions, 6 deletions
diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c index 1d61f10a92c6..1105250bf02c 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); diff --git a/include/asm-x86_64/mpspec.h b/include/asm-x86_64/mpspec.h index 6b375384f5c2..6f8a17d105ab 100644 --- a/include/asm-x86_64/mpspec.h +++ b/include/asm-x86_64/mpspec.h @@ -16,7 +16,7 @@ /* * A maximum of 255 APICs with the current APIC ID architecture. */ -#define MAX_APICS 128 +#define MAX_APICS 255 struct intel_mp_floating { @@ -173,7 +173,7 @@ extern int smp_found_config; extern void find_smp_config (void); extern void get_smp_config (void); extern int nr_ioapics; -extern int apic_version [MAX_APICS]; +extern unsigned char apic_version [MAX_APICS]; extern int mp_irq_entries; extern struct mpc_config_intsrc mp_irqs [MAX_IRQ_SOURCES]; extern int mpc_default_type; |