Part Number: DRA829V
Hi TI experts,
We're trying to test CPU hotplug on the TI Jacinto7 EVM platform. The CPU goes offline correctly but then when we try bring it back online it fails. Here are the logs.
cpuinfo
root@j7-evm:~# cat /proc/cpuinfo processor : 0 BogoMIPS : 400.00 Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x1 CPU part : 0xd08 CPU revision : 0 processor : 1 BogoMIPS : 400.00 Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x1 CPU part : 0xd08 CPU revision : 0
take the cpu1 offline
root@j7-evm:~# echo 0 > /sys/devices/system/cpu/cpu1/online [ 214.786894] CPU1: shutdown [ 214.789593] psci: CPU1 killed (polled 0 ms) root@j7-evm:~# root@j7-evm:~# cat /proc/cpuinfo processor : 0 BogoMIPS : 400.00 Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x1 CPU part : 0xd08 CPU revision : 0
now try to bring it back up again
root@j7-evm:~# echo 1 > /sys/devices/system/cpu/cpu1/online [ 229.726287] CPU1: failed to come online [ 229.730112] CPU1: failed in unknown state : 0x0 -sh: echo: write error: Input/output error root@j7-evm:~# root@j7-evm:~# cat /proc/cpuinfo processor : 0 BogoMIPS : 400.00 Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x1 CPU part : 0xd08 CPU revision : 0
Please suggest what might be going wrong here.
