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| author | Keir Fraser <keir.fraser@citrix.com> | 2009-11-10 13:04:45 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2009-11-10 13:04:45 +0000 |
| commit | 24be6cfe21e78262f7100e6d100aeef0cddd5ab7 (patch) | |
| tree | 0d1a729ee8fc9c5bfe3a43a7872fb819bcd0903e /xen/include/xen/smp.h | |
| parent | fee63693e0ea23d24f239a05c0607021de02dd7f (diff) | |
| download | xen-24be6cfe21e78262f7100e6d100aeef0cddd5ab7.tar.gz xen-24be6cfe21e78262f7100e6d100aeef0cddd5ab7.tar.bz2 xen-24be6cfe21e78262f7100e6d100aeef0cddd5ab7.zip | |
Mark CPU present when it is detected
Currently a CPU is marked as present only after it has been kicked off
successfully, i.e. before the CPU is brought up, it is not
present. This patch try to mark CPU as present when it is detected
(either through MPS table or ACPI). If it can't be brought up
successfully, it will be marked as non-present again. This change is
mainly for CPU hot-plug. As discussed, we'd take two step for physical
CPU hot-add. A CPU is firstly marked as present, and later will bring
as online.
Also, In smp_boot_cpus(), xen need only scan all present CPU, and no
need to loop from 0... NR_CPUS. With this change, the bios_cpu_apicid
is not needed anymore.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Diffstat (limited to 'xen/include/xen/smp.h')
| -rw-r--r-- | xen/include/xen/smp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xen/include/xen/smp.h b/xen/include/xen/smp.h index 3d889ba662..6d77c5d76b 100644 --- a/xen/include/xen/smp.h +++ b/xen/include/xen/smp.h @@ -68,4 +68,6 @@ static inline int on_each_cpu( #define lock_cpu_hotplug() ((void)0) #define unlock_cpu_hotplug() ((void)0) +int alloc_cpu_id(void); + #endif /* __XEN_SMP_H__ */ |