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authorAshok Raj <ashok.raj@intel.com>2006-02-14 18:01:12 -0500
committerTony Luck <tony.luck@intel.com>2006-02-14 18:37:58 -0500
commita6b14fa6fdc01ab3519c2729624f808677539b59 (patch)
tree5bf76be44b0c9c7f80612ac71a1b1a4390decd7d /include/asm-ia64
parent69aa234b918c0d9bc4a20cd6d4453aaa3418f457 (diff)
[IA64] Count disabled cpus as potential hot-pluggable CPUs
Have a facility to account for potentially hot-pluggable CPUs. ACPI doesnt give a determinstic method to find hot-pluggable CPUs. Hence we use 2 methods to assist. - BIOS can mark potentially hot-pluggable CPUs as disabled in the MADT tables. - User can specify the number of hot-pluggable CPUs via parameter additional_cpus=X The option is enabled only if ACPI_CONFIG_HOTPLUG_CPU=y which enables the physical hotplug option. Without which user can still use logical onlining and offlining of CPUs by enabling CONFIG_HOTPLUG_CPU=y Adds more bits to cpu_possible_map for potentially hot-pluggable cpus. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64')
-rw-r--r--include/asm-ia64/acpi.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-ia64/acpi.h b/include/asm-ia64/acpi.h
index 3a544ffc5008..f7a517654308 100644
--- a/include/asm-ia64/acpi.h
+++ b/include/asm-ia64/acpi.h
@@ -106,6 +106,8 @@ extern unsigned int can_cpei_retarget(void);
106extern unsigned int is_cpu_cpei_target(unsigned int cpu); 106extern unsigned int is_cpu_cpei_target(unsigned int cpu);
107extern void set_cpei_target_cpu(unsigned int cpu); 107extern void set_cpei_target_cpu(unsigned int cpu);
108extern unsigned int get_cpei_target_cpu(void); 108extern unsigned int get_cpei_target_cpu(void);
109extern void prefill_possible_map(void);
110extern int additional_cpus;
109 111
110#ifdef CONFIG_ACPI_NUMA 112#ifdef CONFIG_ACPI_NUMA
111/* Proximity bitmap length; _PXM is at most 255 (8 bit)*/ 113/* Proximity bitmap length; _PXM is at most 255 (8 bit)*/