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/mpic.h>
18 #include <asm/xics.h>
19 #include <asm/smp.h>
20
21 #include "pseries.h"
22 #include "plpar_wrappers.h"
23
pseries_kexec_cpu_down(int crash_shutdown,int secondary)24 static 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
pseries_kexec_cpu_down_mpic(int crash_shutdown,int secondary)56 static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
57 {
58 pseries_kexec_cpu_down(crash_shutdown, secondary);
59 mpic_teardown_this_cpu(secondary);
60 }
61
setup_kexec_cpu_down_mpic(void)62 void __init setup_kexec_cpu_down_mpic(void)
63 {
64 ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
65 }
66
pseries_kexec_cpu_down_xics(int crash_shutdown,int secondary)67 static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
68 {
69 pseries_kexec_cpu_down(crash_shutdown, secondary);
70 xics_kexec_teardown_cpu(secondary);
71 }
72
setup_kexec_cpu_down_xics(void)73 void __init setup_kexec_cpu_down_xics(void)
74 {
75 ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
76 }
77