Jason Chen CJ 4b03c97a5e add smp_call_function support ...

take use of VCPU_NOTIFY vector, add smp_call_function support.
added a per_cpu field smp_call_info, and make each smp_call_function
is not re-entered, and the caller CPU is returned when all the target
CPUs complete the call.

v4:
- remove global lock
- take use of wait_sync_change function to do the sequence sync

v3:
- remove per_cpu lock in smp_call_info
- use a global lock to ensure smp_call_function sequence
- use pcpu_sync_sleep to wait IPI complete

v2:
- after new smp function come, if old one exist, changed from overwirte
  with the new one to ignore the new one.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>

2018-08-15 12:05:18 +08:00

..

x86

add smp_call_function support

2018-08-15 12:05:18 +08:00