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11e52bca84
This patch improves cpu hotplug, previous cpu_off implementation is NOT safe, a CPU can NOT power down itself in runtime, it will cause system bus hang due to pending transaction. So need to use other online CPU to kill it when it is ready for killed. Here use SRC parameter register and a magic number of ~0 as handshake for killing a offline CPU, when the online CPU checks the psci_affinity_info, it will help kill the offline CPU according to the magic number stored in SRC parameter register. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> |
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| .gitignore | ||
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