I want to hotplug CPU-1 in 4 cpu system which is based on arm v8 arch. I am using Linux kernel 3.18.18. I want to add cpu1 at run time.

I tried below code base.

for (i=0; i<4; i++) { pr_err ("%s: checking online cpus : %d ", __func__, i); if (cpu_online(i)) continue; pr_err("Onlining CPU%d\n", i); if (cpu_up(i)) { pr_err("Onlining CPU%d failed\n", i); } else pr_err("Onlining CPU%d usng smp_call \n", i); }

It failed with below error : [ 7.085328] psci: failed to boot CPU2 (-22) [ 7.089136] CPU2: failed to boot: -22

Thanks, ---------------------------------------------------------------------------------------------------------------------------------- Atul Raut http://rautatul.weebly.com/ http://atulraut.wordpress.com/ http://rautatul.wordpress.com/ atulraut17@gmail.com hackbod@android.com

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