/* * This function will be called by secondary cpus or by kexec cpu * if soft-reset is activated to stop some CPUs. */ void crash_kexec_secondary(struct pt_regs *regs) { int cpu = smp_processor_id(); unsigned long flags; int msecs = 5; local_irq_save(flags); /* Wait 5ms if the kexec CPU is not entered yet. */ while (crashing_cpu < 0) { if (--msecs < 0) { /* * Either kdump image is not loaded or * kdump process is not started - Probably xmon * exited using 'x'(exit and recover) or * kexec_should_crash() failed for all running tasks. */ cpu_clear(cpu, cpus_in_sr); local_irq_restore(flags); return; } mdelay(1); cpu_relax(); } if (cpu == crashing_cpu) { /* * Panic CPU will enter this func only via soft-reset. * Wait until all secondary CPUs entered and * then start kexec boot. */ crash_soft_reset_check(cpu); cpu_set(crashing_cpu, cpus_in_crash); if (ppc_md.kexec_cpu_down) ppc_md.kexec_cpu_down(1, 0); machine_kexec(kexec_crash_image); /* NOTREACHED */ } crash_ipi_callback(regs); }
void machine_reboot_kexec(xen_kexec_image_t *image) { machine_kexec(image); }