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
pseries_kexec_cpu_down(int crash_shutdown,int secondary)24 void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
25 {
26 /*
27 * Don't risk a hypervisor call if we're crashing
28 * XXX: Why? The hypervisor is not crashing. It might be better
29 * to at least attempt unregister to avoid the hypervisor stepping
30 * on our memory.
31 */
32 if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
33 int ret;
34 int cpu = smp_processor_id();
35 int hwcpu = hard_smp_processor_id();
36
37 if (get_lppaca()->dtl_enable_mask) {
38 ret = unregister_dtl(hwcpu);
39 if (ret) {
40 pr_err("WARNING: DTL deregistration for cpu "
41 "%d (hw %d) failed with %d\n",
42 cpu, hwcpu, ret);
43 }
44 }
45
46 ret = unregister_slb_shadow(hwcpu);
47 if (ret) {
48 pr_err("WARNING: SLB shadow buffer deregistration "
49 "for cpu %d (hw %d) failed with %d\n",
50 cpu, hwcpu, ret);
51 }
52
53 ret = unregister_vpa(hwcpu);
54 if (ret) {
55 pr_err("WARNING: VPA deregistration for cpu %d "
56 "(hw %d) failed with %d\n", cpu, hwcpu, ret);
57 }
58 }
59
60 if (xive_enabled()) {
61 xive_teardown_cpu();
62
63 if (!secondary)
64 xive_shutdown();
65 } else
66 xics_kexec_teardown_cpu(secondary);
67 }
68
