diff options
| author |   Ashok Raj <ashok.raj@intel.com> | 2006-02-14 15:01:12 -0800 |
|---|---|---|
| committer |   Tony Luck <tony.luck@intel.com> | 2006-02-14 15:37:58 -0800 |
| commit | a6b14fa6fdc01ab3519c2729624f808677539b59 (patch) | |
| tree | 5bf76be44b0c9c7f80612ac71a1b1a4390decd7d /include | |
| parent | [IA64] Dont set NR_CPUS for cpu_possible_map when CPU hotplug is enabled. (diff) | |
| download | linux-dev-a6b14fa6fdc01ab3519c2729624f808677539b59.tar.xz linux-dev-a6b14fa6fdc01ab3519c2729624f808677539b59.zip | |
[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')
| -rw-r--r-- | include/asm-ia64/acpi.h | 2 |
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); extern unsigned int is_cpu_cpei_target(unsigned int cpu); extern void set_cpei_target_cpu(unsigned int cpu); extern unsigned int get_cpei_target_cpu(void); +extern void prefill_possible_map(void); +extern int additional_cpus; #ifdef CONFIG_ACPI_NUMA /* Proximity bitmap length; _PXM is at most 255 (8 bit)*/ |