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 /arch/ia64/kernel/setup.c | |
| parent | 69aa234b918c0d9bc4a20cd6d4453aaa3418f457 (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 'arch/ia64/kernel/setup.c')
| -rw-r--r-- | arch/ia64/kernel/setup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 35f7835294a3..3258e09278d0 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -430,6 +430,7 @@ setup_arch (char **cmdline_p) if (early_console_setup(*cmdline_p) == 0) mark_bsp_online(); + parse_early_param(); #ifdef CONFIG_ACPI /* Initialize the ACPI boot-time table parser */ acpi_table_init(); @@ -688,6 +689,9 @@ void setup_per_cpu_areas (void) { /* start_kernel() requires this... */ +#ifdef CONFIG_ACPI_HOTPLUG_CPU + prefill_possible_map(); +#endif } /* |