1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2020, Red Hat, Inc.
4 */
5 #include "guest_modes.h"
6
7 #ifdef __aarch64__
8 #include "processor.h"
9 enum vm_guest_mode vm_mode_default;
10 #endif
11
12 struct guest_mode guest_modes[NUM_VM_MODES];
13
guest_modes_append_default(void)14 void guest_modes_append_default(void)
15 {
16 #ifndef __aarch64__
17 guest_mode_append(VM_MODE_DEFAULT, true, true);
18 #else
19 {
20 unsigned int limit = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);
21 bool ps4k, ps16k, ps64k;
22 int i;
23
24 aarch64_get_supported_page_sizes(limit, &ps4k, &ps16k, &ps64k);
25
26 vm_mode_default = NUM_VM_MODES;
27
28 if (limit >= 52)
29 guest_mode_append(VM_MODE_P52V48_64K, ps64k, ps64k);
30 if (limit >= 48) {
31 guest_mode_append(VM_MODE_P48V48_4K, ps4k, ps4k);
32 guest_mode_append(VM_MODE_P48V48_16K, ps16k, ps16k);
33 guest_mode_append(VM_MODE_P48V48_64K, ps64k, ps64k);
34 }
35 if (limit >= 40) {
36 guest_mode_append(VM_MODE_P40V48_4K, ps4k, ps4k);
37 guest_mode_append(VM_MODE_P40V48_16K, ps16k, ps16k);
38 guest_mode_append(VM_MODE_P40V48_64K, ps64k, ps64k);
39 if (ps4k)
40 vm_mode_default = VM_MODE_P40V48_4K;
41 }
42 if (limit >= 36) {
43 guest_mode_append(VM_MODE_P36V48_4K, ps4k, ps4k);
44 guest_mode_append(VM_MODE_P36V48_16K, ps16k, ps16k);
45 guest_mode_append(VM_MODE_P36V48_64K, ps64k, ps64k);
46 guest_mode_append(VM_MODE_P36V47_16K, ps16k, ps16k);
47 }
48
49 /*
50 * Pick the first supported IPA size if the default
51 * isn't available.
52 */
53 for (i = 0; vm_mode_default == NUM_VM_MODES && i < NUM_VM_MODES; i++) {
54 if (guest_modes[i].supported && guest_modes[i].enabled)
55 vm_mode_default = i;
56 }
57
58 TEST_ASSERT(vm_mode_default != NUM_VM_MODES,
59 "No supported mode!");
60 }
61 #endif
62 #ifdef __s390x__
63 {
64 int kvm_fd, vm_fd;
65 struct kvm_s390_vm_cpu_processor info;
66
67 kvm_fd = open_kvm_dev_path_or_exit();
68 vm_fd = __kvm_ioctl(kvm_fd, KVM_CREATE_VM, NULL);
69 kvm_device_attr_get(vm_fd, KVM_S390_VM_CPU_MODEL,
70 KVM_S390_VM_CPU_PROCESSOR, &info);
71 close(vm_fd);
72 close(kvm_fd);
73 /* Starting with z13 we have 47bits of physical address */
74 if (info.ibc >= 0x30)
75 guest_mode_append(VM_MODE_P47V64_4K, true, true);
76 }
77 #endif
78 #ifdef __riscv
79 {
80 unsigned int sz = kvm_check_cap(KVM_CAP_VM_GPA_BITS);
81
82 if (sz >= 52)
83 guest_mode_append(VM_MODE_P52V48_4K, true, true);
84 if (sz >= 48)
85 guest_mode_append(VM_MODE_P48V48_4K, true, true);
86 }
87 #endif
88 }
89
for_each_guest_mode(void (* func)(enum vm_guest_mode,void *),void * arg)90 void for_each_guest_mode(void (*func)(enum vm_guest_mode, void *), void *arg)
91 {
92 int i;
93
94 for (i = 0; i < NUM_VM_MODES; ++i) {
95 if (!guest_modes[i].enabled)
96 continue;
97 TEST_ASSERT(guest_modes[i].supported,
98 "Guest mode ID %d (%s) not supported.",
99 i, vm_guest_mode_string(i));
100 func(i, arg);
101 }
102 }
103
guest_modes_help(void)104 void guest_modes_help(void)
105 {
106 int i;
107
108 printf(" -m: specify the guest mode ID to test\n"
109 " (default: test all supported modes)\n"
110 " This option may be used multiple times.\n"
111 " Guest mode IDs:\n");
112 for (i = 0; i < NUM_VM_MODES; ++i) {
113 printf(" %d: %s%s\n", i, vm_guest_mode_string(i),
114 guest_modes[i].supported ? " (supported)" : "");
115 }
116 }
117
guest_modes_cmdline(const char * arg)118 void guest_modes_cmdline(const char *arg)
119 {
120 static bool mode_selected;
121 unsigned int mode;
122 int i;
123
124 if (!mode_selected) {
125 for (i = 0; i < NUM_VM_MODES; ++i)
126 guest_modes[i].enabled = false;
127 mode_selected = true;
128 }
129
130 mode = strtoul(optarg, NULL, 10);
131 TEST_ASSERT(mode < NUM_VM_MODES, "Guest mode ID %d too big", mode);
132 guest_modes[mode].enabled = true;
133 }
134
