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add smp_call_function support

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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>
This commit is contained in:
Jason Chen CJ
2018-08-12 21:02:27 +08:00
committed by lijinxia
parent 8ef072165f
commit 4b03c97a5e
3 changed files with 48 additions and 2 deletions
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1
hypervisor/include/arch/x86/per_cpu.h
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@@ -46,6 +46,7 @@ struct per_cpu_region {
uint8_t stack[CONFIG_STACK_SIZE] __aligned(16);
char logbuf[LOG_MESSAGE_MAX_SIZE];
uint8_t lapic_id;
struct smp_call_info_data smp_call_info;
} __aligned(CPU_PAGE_SIZE); //per_cpu_region size aligned with CPU_PAGE_SIZE
extern struct per_cpu_region *per_cpu_data_base_ptr;