1 /* 2 * Copyright 2006 Michael Ellerman, IBM Corporation 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/interrupt.h> 12 13 #include <asm/machdep.h> 14 #include <asm/page.h> 15 #include <asm/firmware.h> 16 #include <asm/kexec.h> 17 #include <asm/xics.h> 18 #include <asm/xive.h> 19 #include <asm/smp.h> 20 #include <asm/plpar_wrappers.h> 21 22 #include "pseries.h" 23 24 void pseries_kexec_cpu_down(int crash_shutdown, int secondary) 25 { 26 /* Don't risk a hypervisor call if we're crashing */ 27 if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) { 28 int ret; 29 int cpu = smp_processor_id(); 30 int hwcpu = hard_smp_processor_id(); 31 32 if (get_lppaca()->dtl_enable_mask) { 33 ret = unregister_dtl(hwcpu); 34 if (ret) { 35 pr_err("WARNING: DTL deregistration for cpu " 36 "%d (hw %d) failed with %d\n", 37 cpu, hwcpu, ret); 38 } 39 } 40 41 ret = unregister_slb_shadow(hwcpu); 42 if (ret) { 43 pr_err("WARNING: SLB shadow buffer deregistration " 44 "for cpu %d (hw %d) failed with %d\n", 45 cpu, hwcpu, ret); 46 } 47 48 ret = unregister_vpa(hwcpu); 49 if (ret) { 50 pr_err("WARNING: VPA deregistration for cpu %d " 51 "(hw %d) failed with %d\n", cpu, hwcpu, ret); 52 } 53 } 54 55 if (xive_enabled()) 56 xive_kexec_teardown_cpu(secondary); 57 else 58 xics_kexec_teardown_cpu(secondary); 59 } 60