| /* |
| * Copyright 2006 Michael Ellerman, IBM Corporation |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/interrupt.h> |
| |
| #include <asm/machdep.h> |
| #include <asm/page.h> |
| #include <asm/firmware.h> |
| #include <asm/kexec.h> |
| #include <asm/xics.h> |
| #include <asm/xive.h> |
| #include <asm/smp.h> |
| #include <asm/plpar_wrappers.h> |
| |
| #include "pseries.h" |
| |
| void pseries_kexec_cpu_down(int crash_shutdown, int secondary) |
| { |
| /* |
| * Don't risk a hypervisor call if we're crashing |
| * XXX: Why? The hypervisor is not crashing. It might be better |
| * to at least attempt unregister to avoid the hypervisor stepping |
| * on our memory. |
| */ |
| if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) { |
| int ret; |
| int cpu = smp_processor_id(); |
| int hwcpu = hard_smp_processor_id(); |
| |
| if (get_lppaca()->dtl_enable_mask) { |
| ret = unregister_dtl(hwcpu); |
| if (ret) { |
| pr_err("WARNING: DTL deregistration for cpu " |
| "%d (hw %d) failed with %d\n", |
| cpu, hwcpu, ret); |
| } |
| } |
| |
| ret = unregister_slb_shadow(hwcpu); |
| if (ret) { |
| pr_err("WARNING: SLB shadow buffer deregistration " |
| "for cpu %d (hw %d) failed with %d\n", |
| cpu, hwcpu, ret); |
| } |
| |
| ret = unregister_vpa(hwcpu); |
| if (ret) { |
| pr_err("WARNING: VPA deregistration for cpu %d " |
| "(hw %d) failed with %d\n", cpu, hwcpu, ret); |
| } |
| } |
| |
| if (xive_enabled()) { |
| xive_kexec_teardown_cpu(secondary); |
| |
| if (!secondary) |
| xive_shutdown(); |
| } else |
| xics_kexec_teardown_cpu(secondary); |
| } |
