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[PATCH] x86: sutomatically enable bigsmp when we have more than 8 CPUs

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i386 generic subarchitecture requires explicit dmi strings or command line
to enable bigsmp mode.  The patch below removes that restriction, and uses
bigsmp as soon as it finds more than 8 logical CPUs, Intel processors and
xAPIC support.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Venkatesh Pallipadi
2005-09-03 15:56:31 -07:00
committed by Linus Torvalds
parent 484b90c4b9
commit 911a62d423
8 changed files with 47 additions and 2 deletions
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1
include/asm-i386/apicdef.h
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@@ -16,6 +16,7 @@
#define GET_APIC_VERSION(x) ((x)&0xFF)
#define GET_APIC_MAXLVT(x) (((x)>>16)&0xFF)
#define APIC_INTEGRATED(x) ((x)&0xF0)
#define APIC_XAPIC(x) ((x) >= 0x14)
#define APIC_TASKPRI 0x80
#define APIC_TPRI_MASK 0xFF
#define APIC_ARBPRI 0x90

2
include/asm-i386/mach-generic/mach_apic.h
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@@ -28,4 +28,6 @@
#define enable_apic_mode (genapic->enable_apic_mode)
#define phys_pkg_id (genapic->phys_pkg_id)
extern void generic_bigsmp_probe(void);
#endif /* __ASM_MACH_APIC_H */

1
include/asm-i386/mpspec.h
View File

@@ -11,6 +11,7 @@ extern int mp_bus_id_to_local [MAX_MP_BUSSES];
extern int quad_local_to_mp_bus_id [NR_CPUS/4][4];
extern int mp_bus_id_to_pci_bus [MAX_MP_BUSSES];
extern unsigned int def_to_bigsmp;
extern unsigned int boot_cpu_physical_apicid;
extern int smp_found_config;
extern void find_smp_config (void);