Commit | Line | Data |
---|---|---|
e28acfea | 1 | /* |
a53c8fab | 2 | * handling diagnose instructions |
e28acfea | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2011 |
e28acfea CB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | */ | |
13 | ||
14 | #include <linux/kvm.h> | |
15 | #include <linux/kvm_host.h> | |
16 | #include "kvm-s390.h" | |
17 | ||
388186bc CB |
18 | static int diag_release_pages(struct kvm_vcpu *vcpu) |
19 | { | |
20 | unsigned long start, end; | |
21 | unsigned long prefix = vcpu->arch.sie_block->prefix; | |
22 | ||
5a32c1af CB |
23 | start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4]; |
24 | end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096; | |
388186bc CB |
25 | |
26 | if (start & ~PAGE_MASK || end & ~PAGE_MASK || start > end | |
27 | || start < 2 * PAGE_SIZE) | |
28 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
29 | ||
30 | VCPU_EVENT(vcpu, 5, "diag release pages %lX %lX", start, end); | |
31 | vcpu->stat.diagnose_10++; | |
32 | ||
33 | /* we checked for start > end above */ | |
34 | if (end < prefix || start >= prefix + 2 * PAGE_SIZE) { | |
35 | gmap_discard(start, end, vcpu->arch.gmap); | |
36 | } else { | |
37 | if (start < prefix) | |
38 | gmap_discard(start, prefix, vcpu->arch.gmap); | |
39 | if (end >= prefix) | |
40 | gmap_discard(prefix + 2 * PAGE_SIZE, | |
41 | end, vcpu->arch.gmap); | |
42 | } | |
43 | return 0; | |
44 | } | |
45 | ||
e28acfea CB |
46 | static int __diag_time_slice_end(struct kvm_vcpu *vcpu) |
47 | { | |
48 | VCPU_EVENT(vcpu, 5, "%s", "diag time slice end"); | |
49 | vcpu->stat.diagnose_44++; | |
8733ac36 | 50 | kvm_vcpu_on_spin(vcpu); |
e28acfea CB |
51 | return 0; |
52 | } | |
53 | ||
41628d33 KW |
54 | static int __diag_time_slice_end_directed(struct kvm_vcpu *vcpu) |
55 | { | |
56 | struct kvm *kvm = vcpu->kvm; | |
57 | struct kvm_vcpu *tcpu; | |
58 | int tid; | |
59 | int i; | |
60 | ||
61 | tid = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4]; | |
62 | vcpu->stat.diagnose_9c++; | |
63 | VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d", tid); | |
64 | ||
65 | if (tid == vcpu->vcpu_id) | |
66 | return 0; | |
67 | ||
68 | kvm_for_each_vcpu(i, tcpu, kvm) | |
69 | if (tcpu->vcpu_id == tid) { | |
70 | kvm_vcpu_yield_to(tcpu); | |
71 | break; | |
72 | } | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
e28acfea CB |
77 | static int __diag_ipl_functions(struct kvm_vcpu *vcpu) |
78 | { | |
79 | unsigned int reg = vcpu->arch.sie_block->ipa & 0xf; | |
5a32c1af | 80 | unsigned long subcode = vcpu->run->s.regs.gprs[reg] & 0xffff; |
e28acfea CB |
81 | |
82 | VCPU_EVENT(vcpu, 5, "diag ipl functions, subcode %lx", subcode); | |
83 | switch (subcode) { | |
84 | case 3: | |
85 | vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR; | |
86 | break; | |
87 | case 4: | |
88 | vcpu->run->s390_reset_flags = 0; | |
89 | break; | |
90 | default: | |
b8e660b8 | 91 | return -EOPNOTSUPP; |
e28acfea CB |
92 | } |
93 | ||
9e6dabef | 94 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
e28acfea CB |
95 | vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM; |
96 | vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL; | |
97 | vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT; | |
98 | vcpu->run->exit_reason = KVM_EXIT_S390_RESET; | |
33e19115 | 99 | VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx", |
e28acfea CB |
100 | vcpu->run->s390_reset_flags); |
101 | return -EREMOTE; | |
102 | } | |
103 | ||
104 | int kvm_s390_handle_diag(struct kvm_vcpu *vcpu) | |
105 | { | |
106 | int code = (vcpu->arch.sie_block->ipb & 0xfff0000) >> 16; | |
107 | ||
108 | switch (code) { | |
388186bc CB |
109 | case 0x10: |
110 | return diag_release_pages(vcpu); | |
e28acfea CB |
111 | case 0x44: |
112 | return __diag_time_slice_end(vcpu); | |
41628d33 KW |
113 | case 0x9c: |
114 | return __diag_time_slice_end_directed(vcpu); | |
e28acfea CB |
115 | case 0x308: |
116 | return __diag_ipl_functions(vcpu); | |
117 | default: | |
b8e660b8 | 118 | return -EOPNOTSUPP; |
e28acfea CB |
119 | } |
120 | } |