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20c90d5b43
add support for set an IRQ affinity to CPUs by software
qemu-armv7a/bmp: switch uart irq to different CPUs
nsh> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED FILLED COMMAND
0 0 0 FIFO Kthread - Ready 0000000000000000 004080 000536 13.1% CPU0 IDLE
1 1 192 RR Kthread - Waiting Semaphore 0000000000000000 004032 000296 7.3% hpwork 0x4013f51c 0x4013f530
2 2 100 RR Task - Running 0000000000000000 004056 001168 28.7% nsh_main
nsh> irqaff 33 0x2
nsh> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED FILLED COMMAND
0 0 0 FIFO Kthread - Ready 0000000000000000 004080 000736 18.0% CPU1 IDLE
1 1 192 RR Kthread - Waiting Semaphore 0000000000000000 004032 000296 7.3% hpwork 0x4013f544 0x4013f558
2 2 100 RR Task - Running 0000000000000000 004056 001288 31.7% nsh_main
nsh> irqaff 33 0x4
nsh> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED FILLED COMMAND
0 0 0 FIFO Kthread - Ready 0000000000000000 004080 000736 18.0% CPU2 IDLE
1 1 192 RR Kthread - Waiting Semaphore 0000000000000000 004032 000296 7.3% hpwork 0x4013f56c 0x4013f580
2 2 100 RR Task - Running 0000000000000000 004056 001168 28.7% nsh_main
nsh> irqaff 33 0x8
nsh> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED FILLED COMMAND
0 0 0 FIFO Kthread - Ready 0000000000000000 004080 000736 18.0% CPU3 IDLE
1 1 192 RR Kthread - Waiting Semaphore 0000000000000000 004032 000296 7.3% hpwork 0x4013f594 0x4013f5a8
2 2 100 RR Task - Running 0000000000000000 004056 001168 28.7% nsh_main
Signed-off-by: chao an <anchao@lixiang.com>