]>
Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
be81c8a1 DK |
2 | /* |
3 | * EFI support for Xen. | |
4 | * | |
5 | * Copyright (C) 1999 VA Linux Systems | |
6 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
7 | * Copyright (C) 1999-2002 Hewlett-Packard Co. | |
8 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
9 | * Stephane Eranian <eranian@hpl.hp.com> | |
10 | * Copyright (C) 2005-2008 Intel Co. | |
11 | * Fenghua Yu <fenghua.yu@intel.com> | |
12 | * Bibo Mao <bibo.mao@intel.com> | |
13 | * Chandramouli Narayanan <mouli@linux.intel.com> | |
14 | * Huang Ying <ying.huang@intel.com> | |
15 | * Copyright (C) 2011 Novell Co. | |
16 | * Jan Beulich <JBeulich@suse.com> | |
17 | * Copyright (C) 2011-2012 Oracle Co. | |
18 | * Liang Tang <liang.tang@oracle.com> | |
19 | * Copyright (c) 2014 Oracle Co., Daniel Kiper | |
20 | */ | |
21 | ||
22 | #include <linux/bug.h> | |
23 | #include <linux/efi.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/string.h> | |
26 | ||
27 | #include <xen/interface/xen.h> | |
28 | #include <xen/interface/platform.h> | |
29 | #include <xen/xen.h> | |
e371fd76 | 30 | #include <xen/xen-ops.h> |
be81c8a1 | 31 | |
342cd340 DK |
32 | #include <asm/page.h> |
33 | ||
be81c8a1 DK |
34 | #include <asm/xen/hypercall.h> |
35 | ||
36 | #define INIT_EFI_OP(name) \ | |
37 | {.cmd = XENPF_efi_runtime_call, \ | |
38 | .u.efi_runtime_call.function = XEN_EFI_##name, \ | |
39 | .u.efi_runtime_call.misc = 0} | |
40 | ||
41 | #define efi_data(op) (op.u.efi_runtime_call) | |
42 | ||
09515706 | 43 | static efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) |
be81c8a1 DK |
44 | { |
45 | struct xen_platform_op op = INIT_EFI_OP(get_time); | |
46 | ||
cfafae94 | 47 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
48 | return EFI_UNSUPPORTED; |
49 | ||
50 | if (tm) { | |
51 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_time.time)); | |
52 | memcpy(tm, &efi_data(op).u.get_time.time, sizeof(*tm)); | |
53 | } | |
54 | ||
55 | if (tc) { | |
56 | tc->resolution = efi_data(op).u.get_time.resolution; | |
57 | tc->accuracy = efi_data(op).u.get_time.accuracy; | |
58 | tc->sets_to_zero = !!(efi_data(op).misc & | |
59 | XEN_EFI_GET_TIME_SET_CLEARS_NS); | |
60 | } | |
61 | ||
62 | return efi_data(op).status; | |
63 | } | |
64 | ||
09515706 | 65 | static efi_status_t xen_efi_set_time(efi_time_t *tm) |
be81c8a1 DK |
66 | { |
67 | struct xen_platform_op op = INIT_EFI_OP(set_time); | |
68 | ||
69 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_time)); | |
70 | memcpy(&efi_data(op).u.set_time, tm, sizeof(*tm)); | |
71 | ||
cfafae94 | 72 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
73 | return EFI_UNSUPPORTED; |
74 | ||
75 | return efi_data(op).status; | |
76 | } | |
77 | ||
09515706 JG |
78 | static efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, |
79 | efi_bool_t *pending, | |
80 | efi_time_t *tm) | |
be81c8a1 DK |
81 | { |
82 | struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time); | |
83 | ||
cfafae94 | 84 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
85 | return EFI_UNSUPPORTED; |
86 | ||
87 | if (tm) { | |
88 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_wakeup_time)); | |
89 | memcpy(tm, &efi_data(op).u.get_wakeup_time, sizeof(*tm)); | |
90 | } | |
91 | ||
92 | if (enabled) | |
93 | *enabled = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_ENABLED); | |
94 | ||
95 | if (pending) | |
96 | *pending = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_PENDING); | |
97 | ||
98 | return efi_data(op).status; | |
99 | } | |
100 | ||
09515706 | 101 | static efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) |
be81c8a1 DK |
102 | { |
103 | struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time); | |
104 | ||
105 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_wakeup_time)); | |
106 | if (enabled) | |
107 | efi_data(op).misc = XEN_EFI_SET_WAKEUP_TIME_ENABLE; | |
108 | if (tm) | |
109 | memcpy(&efi_data(op).u.set_wakeup_time, tm, sizeof(*tm)); | |
110 | else | |
111 | efi_data(op).misc |= XEN_EFI_SET_WAKEUP_TIME_ENABLE_ONLY; | |
112 | ||
cfafae94 | 113 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
114 | return EFI_UNSUPPORTED; |
115 | ||
116 | return efi_data(op).status; | |
117 | } | |
118 | ||
09515706 JG |
119 | static efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor, |
120 | u32 *attr, unsigned long *data_size, | |
121 | void *data) | |
be81c8a1 DK |
122 | { |
123 | struct xen_platform_op op = INIT_EFI_OP(get_variable); | |
124 | ||
125 | set_xen_guest_handle(efi_data(op).u.get_variable.name, name); | |
126 | BUILD_BUG_ON(sizeof(*vendor) != | |
127 | sizeof(efi_data(op).u.get_variable.vendor_guid)); | |
128 | memcpy(&efi_data(op).u.get_variable.vendor_guid, vendor, sizeof(*vendor)); | |
129 | efi_data(op).u.get_variable.size = *data_size; | |
130 | set_xen_guest_handle(efi_data(op).u.get_variable.data, data); | |
131 | ||
cfafae94 | 132 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
133 | return EFI_UNSUPPORTED; |
134 | ||
135 | *data_size = efi_data(op).u.get_variable.size; | |
136 | if (attr) | |
137 | *attr = efi_data(op).misc; | |
138 | ||
139 | return efi_data(op).status; | |
140 | } | |
141 | ||
09515706 JG |
142 | static efi_status_t xen_efi_get_next_variable(unsigned long *name_size, |
143 | efi_char16_t *name, | |
144 | efi_guid_t *vendor) | |
be81c8a1 DK |
145 | { |
146 | struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name); | |
147 | ||
148 | efi_data(op).u.get_next_variable_name.size = *name_size; | |
149 | set_xen_guest_handle(efi_data(op).u.get_next_variable_name.name, name); | |
150 | BUILD_BUG_ON(sizeof(*vendor) != | |
151 | sizeof(efi_data(op).u.get_next_variable_name.vendor_guid)); | |
152 | memcpy(&efi_data(op).u.get_next_variable_name.vendor_guid, vendor, | |
153 | sizeof(*vendor)); | |
154 | ||
cfafae94 | 155 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
156 | return EFI_UNSUPPORTED; |
157 | ||
158 | *name_size = efi_data(op).u.get_next_variable_name.size; | |
159 | memcpy(vendor, &efi_data(op).u.get_next_variable_name.vendor_guid, | |
160 | sizeof(*vendor)); | |
161 | ||
162 | return efi_data(op).status; | |
163 | } | |
164 | ||
09515706 JG |
165 | static efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor, |
166 | u32 attr, unsigned long data_size, | |
167 | void *data) | |
be81c8a1 DK |
168 | { |
169 | struct xen_platform_op op = INIT_EFI_OP(set_variable); | |
170 | ||
171 | set_xen_guest_handle(efi_data(op).u.set_variable.name, name); | |
172 | efi_data(op).misc = attr; | |
173 | BUILD_BUG_ON(sizeof(*vendor) != | |
174 | sizeof(efi_data(op).u.set_variable.vendor_guid)); | |
175 | memcpy(&efi_data(op).u.set_variable.vendor_guid, vendor, sizeof(*vendor)); | |
176 | efi_data(op).u.set_variable.size = data_size; | |
177 | set_xen_guest_handle(efi_data(op).u.set_variable.data, data); | |
178 | ||
cfafae94 | 179 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
180 | return EFI_UNSUPPORTED; |
181 | ||
182 | return efi_data(op).status; | |
183 | } | |
184 | ||
09515706 JG |
185 | static efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space, |
186 | u64 *remaining_space, | |
187 | u64 *max_variable_size) | |
be81c8a1 DK |
188 | { |
189 | struct xen_platform_op op = INIT_EFI_OP(query_variable_info); | |
190 | ||
191 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
192 | return EFI_UNSUPPORTED; | |
193 | ||
194 | efi_data(op).u.query_variable_info.attr = attr; | |
195 | ||
cfafae94 | 196 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
197 | return EFI_UNSUPPORTED; |
198 | ||
199 | *storage_space = efi_data(op).u.query_variable_info.max_store_size; | |
200 | *remaining_space = efi_data(op).u.query_variable_info.remain_store_size; | |
201 | *max_variable_size = efi_data(op).u.query_variable_info.max_size; | |
202 | ||
203 | return efi_data(op).status; | |
204 | } | |
205 | ||
09515706 | 206 | static efi_status_t xen_efi_get_next_high_mono_count(u32 *count) |
be81c8a1 DK |
207 | { |
208 | struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count); | |
209 | ||
cfafae94 | 210 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
211 | return EFI_UNSUPPORTED; |
212 | ||
213 | *count = efi_data(op).misc; | |
214 | ||
215 | return efi_data(op).status; | |
216 | } | |
217 | ||
09515706 JG |
218 | static efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules, |
219 | unsigned long count, unsigned long sg_list) | |
be81c8a1 DK |
220 | { |
221 | struct xen_platform_op op = INIT_EFI_OP(update_capsule); | |
222 | ||
223 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
224 | return EFI_UNSUPPORTED; | |
225 | ||
226 | set_xen_guest_handle(efi_data(op).u.update_capsule.capsule_header_array, | |
227 | capsules); | |
228 | efi_data(op).u.update_capsule.capsule_count = count; | |
229 | efi_data(op).u.update_capsule.sg_list = sg_list; | |
230 | ||
cfafae94 | 231 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
232 | return EFI_UNSUPPORTED; |
233 | ||
234 | return efi_data(op).status; | |
235 | } | |
236 | ||
09515706 JG |
237 | static efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules, |
238 | unsigned long count, u64 *max_size, int *reset_type) | |
be81c8a1 DK |
239 | { |
240 | struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities); | |
241 | ||
242 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
243 | return EFI_UNSUPPORTED; | |
244 | ||
245 | set_xen_guest_handle(efi_data(op).u.query_capsule_capabilities.capsule_header_array, | |
246 | capsules); | |
247 | efi_data(op).u.query_capsule_capabilities.capsule_count = count; | |
248 | ||
cfafae94 | 249 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
250 | return EFI_UNSUPPORTED; |
251 | ||
252 | *max_size = efi_data(op).u.query_capsule_capabilities.max_capsule_size; | |
253 | *reset_type = efi_data(op).u.query_capsule_capabilities.reset_type; | |
254 | ||
255 | return efi_data(op).status; | |
256 | } | |
e371fd76 | 257 | |
09515706 JG |
258 | static void xen_efi_reset_system(int reset_type, efi_status_t status, |
259 | unsigned long data_size, efi_char16_t *data) | |
e371fd76 JG |
260 | { |
261 | switch (reset_type) { | |
262 | case EFI_RESET_COLD: | |
263 | case EFI_RESET_WARM: | |
264 | xen_reboot(SHUTDOWN_reboot); | |
265 | break; | |
266 | case EFI_RESET_SHUTDOWN: | |
267 | xen_reboot(SHUTDOWN_poweroff); | |
268 | break; | |
269 | default: | |
270 | BUG(); | |
271 | } | |
272 | } | |
09515706 JG |
273 | |
274 | /* | |
275 | * Set XEN EFI runtime services function pointers. Other fields of struct efi, | |
276 | * e.g. efi.systab, will be set like normal EFI. | |
277 | */ | |
278 | void __init xen_efi_runtime_setup(void) | |
279 | { | |
280 | efi.get_time = xen_efi_get_time; | |
281 | efi.set_time = xen_efi_set_time; | |
282 | efi.get_wakeup_time = xen_efi_get_wakeup_time; | |
283 | efi.set_wakeup_time = xen_efi_set_wakeup_time; | |
284 | efi.get_variable = xen_efi_get_variable; | |
285 | efi.get_next_variable = xen_efi_get_next_variable; | |
286 | efi.set_variable = xen_efi_set_variable; | |
287 | efi.set_variable_nonblocking = xen_efi_set_variable; | |
288 | efi.query_variable_info = xen_efi_query_variable_info; | |
289 | efi.query_variable_info_nonblocking = xen_efi_query_variable_info; | |
290 | efi.update_capsule = xen_efi_update_capsule; | |
291 | efi.query_capsule_caps = xen_efi_query_capsule_caps; | |
292 | efi.get_next_high_mono_count = xen_efi_get_next_high_mono_count; | |
293 | efi.reset_system = xen_efi_reset_system; | |
294 | } |