Hi Vivek, On Thu, 2014-10-02 at 15:08 -0400, Vivek Goyal wrote: > On Tue, Sep 30, 2014 at 02:27:56PM -0700, Geoff Levand wrote: > > For a running system you can check the device tree: > > > > cat /proc/device-tree/cpus/cpu\@0/enable-method | hexdump -C > > > > So system I have supports spin-table method for cpu bringup. How do I > test your patches with that system. Are there any patches on your > spin-table branch which can make it working? If possible, check if there is a firmware update that supports PSCI. My spin-table patches are now out of date, and fixing those up is now low priority. I modified kexec-tools to only issue a message, but accept a device tree that does not have the new cpu-return-addr property that is needed for kexec on spin-table systems. Since the spin-table stuff is only for managing secondary CPUs, this change should allow you to test kexec with a 1st stage kernel built with CONFIG_SMP=n. Since the secondary CPUs will have never left the spin-table, you should be able to kexec re-boot into an SMP kernel, but you will not be able to do a successful kexec re-boot from there. -Geoff
