[v4][PATCH 5/8] book3e/kexec/kdump: introduce a kexec kernel flag

We need to introduce a flag to indicate we're already running a kexec kernel then we can go proper path. For example, We shouldn't access spin_table from the bootloader to up any secondary cpu for kexec kernel, and kexec kernel already know how to jump to generic_secondary_smp_init.

[v4][PATCH 5/8] book3e/kexec/kdump: introduce a kexec kernel flag

We need to introduce a flag to indicate we're already running a kexec kernel then we can go proper path. For example, We shouldn't access spin_table from the bootloader to up any secondary cpu for kexec kernel, and kexec kernel already know how to jump to generic_secondary_smp_init.