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3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
b0069f43 | 20 | * K. Y. Srinivasan <kys@microsoft.com> |
52e5c1ce | 21 | * |
3e7ee490 | 22 | */ |
0a46618d HJ |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
3e7ee490 HJ |
25 | #include <linux/init.h> |
26 | #include <linux/module.h> | |
27 | #include <linux/device.h> | |
3e7ee490 HJ |
28 | #include <linux/interrupt.h> |
29 | #include <linux/sysctl.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
b0069f43 | 31 | #include <linux/acpi.h> |
8b5d6d3b | 32 | #include <linux/completion.h> |
46a97191 | 33 | #include <linux/hyperv.h> |
b0209501 | 34 | #include <linux/kernel_stat.h> |
4061ed9e | 35 | #include <linux/clockchips.h> |
e513229b | 36 | #include <linux/cpu.h> |
407dd164 | 37 | #include <asm/hyperv.h> |
1f94ea81 | 38 | #include <asm/hypervisor.h> |
302a3c0f | 39 | #include <asm/mshyperv.h> |
96c1d058 NM |
40 | #include <linux/notifier.h> |
41 | #include <linux/ptrace.h> | |
35464483 | 42 | #include <linux/screen_info.h> |
510f7aef | 43 | #include <linux/kdebug.h> |
6d146aef | 44 | #include <linux/efi.h> |
4b44f2d1 | 45 | #include <linux/random.h> |
0f2a6619 | 46 | #include "hyperv_vmbus.h" |
3e7ee490 | 47 | |
fc76936d SH |
48 | struct vmbus_dynid { |
49 | struct list_head node; | |
50 | struct hv_vmbus_device_id id; | |
51 | }; | |
52 | ||
607c1a11 | 53 | static struct acpi_device *hv_acpi_dev; |
1168ac22 | 54 | |
71a6655d | 55 | static struct completion probe_event; |
98db4335 | 56 | |
fdf5149c | 57 | static int hyperv_cpuhp_online; |
96c1d058 | 58 | |
510f7aef VK |
59 | static int hyperv_panic_event(struct notifier_block *nb, unsigned long val, |
60 | void *args) | |
61 | { | |
62 | struct pt_regs *regs; | |
63 | ||
64 | regs = current_pt_regs(); | |
65 | ||
66 | hyperv_report_panic(regs); | |
96c1d058 NM |
67 | return NOTIFY_DONE; |
68 | } | |
69 | ||
510f7aef VK |
70 | static int hyperv_die_event(struct notifier_block *nb, unsigned long val, |
71 | void *args) | |
72 | { | |
73 | struct die_args *die = (struct die_args *)args; | |
74 | struct pt_regs *regs = die->regs; | |
75 | ||
76 | hyperv_report_panic(regs); | |
77 | return NOTIFY_DONE; | |
78 | } | |
79 | ||
80 | static struct notifier_block hyperv_die_block = { | |
81 | .notifier_call = hyperv_die_event, | |
82 | }; | |
96c1d058 NM |
83 | static struct notifier_block hyperv_panic_block = { |
84 | .notifier_call = hyperv_panic_event, | |
85 | }; | |
86 | ||
6d146aef JO |
87 | static const char *fb_mmio_name = "fb_range"; |
88 | static struct resource *fb_mmio; | |
e2e80841 SH |
89 | static struct resource *hyperv_mmio; |
90 | static DEFINE_SEMAPHORE(hyperv_mmio_lock); | |
98db4335 | 91 | |
cf6a2eac S |
92 | static int vmbus_exists(void) |
93 | { | |
94 | if (hv_acpi_dev == NULL) | |
95 | return -ENODEV; | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
fd776ba9 OH |
100 | #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2) |
101 | static void print_alias_name(struct hv_device *hv_dev, char *alias_name) | |
102 | { | |
103 | int i; | |
104 | for (i = 0; i < VMBUS_ALIAS_LEN; i += 2) | |
105 | sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]); | |
106 | } | |
107 | ||
76c52bbe GKH |
108 | static u8 channel_monitor_group(struct vmbus_channel *channel) |
109 | { | |
110 | return (u8)channel->offermsg.monitorid / 32; | |
111 | } | |
112 | ||
113 | static u8 channel_monitor_offset(struct vmbus_channel *channel) | |
114 | { | |
115 | return (u8)channel->offermsg.monitorid % 32; | |
116 | } | |
117 | ||
118 | static u32 channel_pending(struct vmbus_channel *channel, | |
119 | struct hv_monitor_page *monitor_page) | |
120 | { | |
121 | u8 monitor_group = channel_monitor_group(channel); | |
122 | return monitor_page->trigger_group[monitor_group].pending; | |
123 | } | |
124 | ||
1cee272b GKH |
125 | static u32 channel_latency(struct vmbus_channel *channel, |
126 | struct hv_monitor_page *monitor_page) | |
127 | { | |
128 | u8 monitor_group = channel_monitor_group(channel); | |
129 | u8 monitor_offset = channel_monitor_offset(channel); | |
130 | return monitor_page->latency[monitor_group][monitor_offset]; | |
131 | } | |
132 | ||
4947c745 GKH |
133 | static u32 channel_conn_id(struct vmbus_channel *channel, |
134 | struct hv_monitor_page *monitor_page) | |
135 | { | |
136 | u8 monitor_group = channel_monitor_group(channel); | |
137 | u8 monitor_offset = channel_monitor_offset(channel); | |
138 | return monitor_page->parameter[monitor_group][monitor_offset].connectionid.u.id; | |
139 | } | |
140 | ||
03f3a910 GKH |
141 | static ssize_t id_show(struct device *dev, struct device_attribute *dev_attr, |
142 | char *buf) | |
143 | { | |
144 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
145 | ||
146 | if (!hv_dev->channel) | |
147 | return -ENODEV; | |
148 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.child_relid); | |
149 | } | |
150 | static DEVICE_ATTR_RO(id); | |
151 | ||
a8fb5f3d GKH |
152 | static ssize_t state_show(struct device *dev, struct device_attribute *dev_attr, |
153 | char *buf) | |
154 | { | |
155 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
156 | ||
157 | if (!hv_dev->channel) | |
158 | return -ENODEV; | |
159 | return sprintf(buf, "%d\n", hv_dev->channel->state); | |
160 | } | |
161 | static DEVICE_ATTR_RO(state); | |
162 | ||
5ffd00e2 GKH |
163 | static ssize_t monitor_id_show(struct device *dev, |
164 | struct device_attribute *dev_attr, char *buf) | |
165 | { | |
166 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
167 | ||
168 | if (!hv_dev->channel) | |
169 | return -ENODEV; | |
170 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.monitorid); | |
171 | } | |
172 | static DEVICE_ATTR_RO(monitor_id); | |
173 | ||
68234c04 GKH |
174 | static ssize_t class_id_show(struct device *dev, |
175 | struct device_attribute *dev_attr, char *buf) | |
176 | { | |
177 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
178 | ||
179 | if (!hv_dev->channel) | |
180 | return -ENODEV; | |
181 | return sprintf(buf, "{%pUl}\n", | |
182 | hv_dev->channel->offermsg.offer.if_type.b); | |
183 | } | |
184 | static DEVICE_ATTR_RO(class_id); | |
185 | ||
7c55e1d0 GKH |
186 | static ssize_t device_id_show(struct device *dev, |
187 | struct device_attribute *dev_attr, char *buf) | |
188 | { | |
189 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
190 | ||
191 | if (!hv_dev->channel) | |
192 | return -ENODEV; | |
193 | return sprintf(buf, "{%pUl}\n", | |
194 | hv_dev->channel->offermsg.offer.if_instance.b); | |
195 | } | |
196 | static DEVICE_ATTR_RO(device_id); | |
197 | ||
647fa371 GKH |
198 | static ssize_t modalias_show(struct device *dev, |
199 | struct device_attribute *dev_attr, char *buf) | |
200 | { | |
201 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
202 | char alias_name[VMBUS_ALIAS_LEN + 1]; | |
203 | ||
204 | print_alias_name(hv_dev, alias_name); | |
205 | return sprintf(buf, "vmbus:%s\n", alias_name); | |
206 | } | |
207 | static DEVICE_ATTR_RO(modalias); | |
208 | ||
76c52bbe GKH |
209 | static ssize_t server_monitor_pending_show(struct device *dev, |
210 | struct device_attribute *dev_attr, | |
211 | char *buf) | |
212 | { | |
213 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
214 | ||
215 | if (!hv_dev->channel) | |
216 | return -ENODEV; | |
217 | return sprintf(buf, "%d\n", | |
218 | channel_pending(hv_dev->channel, | |
219 | vmbus_connection.monitor_pages[1])); | |
220 | } | |
221 | static DEVICE_ATTR_RO(server_monitor_pending); | |
222 | ||
223 | static ssize_t client_monitor_pending_show(struct device *dev, | |
224 | struct device_attribute *dev_attr, | |
225 | char *buf) | |
226 | { | |
227 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
228 | ||
229 | if (!hv_dev->channel) | |
230 | return -ENODEV; | |
231 | return sprintf(buf, "%d\n", | |
232 | channel_pending(hv_dev->channel, | |
233 | vmbus_connection.monitor_pages[1])); | |
234 | } | |
235 | static DEVICE_ATTR_RO(client_monitor_pending); | |
68234c04 | 236 | |
1cee272b GKH |
237 | static ssize_t server_monitor_latency_show(struct device *dev, |
238 | struct device_attribute *dev_attr, | |
239 | char *buf) | |
240 | { | |
241 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
242 | ||
243 | if (!hv_dev->channel) | |
244 | return -ENODEV; | |
245 | return sprintf(buf, "%d\n", | |
246 | channel_latency(hv_dev->channel, | |
247 | vmbus_connection.monitor_pages[0])); | |
248 | } | |
249 | static DEVICE_ATTR_RO(server_monitor_latency); | |
250 | ||
251 | static ssize_t client_monitor_latency_show(struct device *dev, | |
252 | struct device_attribute *dev_attr, | |
253 | char *buf) | |
254 | { | |
255 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
256 | ||
257 | if (!hv_dev->channel) | |
258 | return -ENODEV; | |
259 | return sprintf(buf, "%d\n", | |
260 | channel_latency(hv_dev->channel, | |
261 | vmbus_connection.monitor_pages[1])); | |
262 | } | |
263 | static DEVICE_ATTR_RO(client_monitor_latency); | |
264 | ||
4947c745 GKH |
265 | static ssize_t server_monitor_conn_id_show(struct device *dev, |
266 | struct device_attribute *dev_attr, | |
267 | char *buf) | |
268 | { | |
269 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
270 | ||
271 | if (!hv_dev->channel) | |
272 | return -ENODEV; | |
273 | return sprintf(buf, "%d\n", | |
274 | channel_conn_id(hv_dev->channel, | |
275 | vmbus_connection.monitor_pages[0])); | |
276 | } | |
277 | static DEVICE_ATTR_RO(server_monitor_conn_id); | |
278 | ||
279 | static ssize_t client_monitor_conn_id_show(struct device *dev, | |
280 | struct device_attribute *dev_attr, | |
281 | char *buf) | |
282 | { | |
283 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
284 | ||
285 | if (!hv_dev->channel) | |
286 | return -ENODEV; | |
287 | return sprintf(buf, "%d\n", | |
288 | channel_conn_id(hv_dev->channel, | |
289 | vmbus_connection.monitor_pages[1])); | |
290 | } | |
291 | static DEVICE_ATTR_RO(client_monitor_conn_id); | |
292 | ||
98f4c651 GKH |
293 | static ssize_t out_intr_mask_show(struct device *dev, |
294 | struct device_attribute *dev_attr, char *buf) | |
295 | { | |
296 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
297 | struct hv_ring_buffer_debug_info outbound; | |
298 | ||
299 | if (!hv_dev->channel) | |
300 | return -ENODEV; | |
301 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
302 | return sprintf(buf, "%d\n", outbound.current_interrupt_mask); | |
303 | } | |
304 | static DEVICE_ATTR_RO(out_intr_mask); | |
305 | ||
306 | static ssize_t out_read_index_show(struct device *dev, | |
307 | struct device_attribute *dev_attr, char *buf) | |
308 | { | |
309 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
310 | struct hv_ring_buffer_debug_info outbound; | |
311 | ||
312 | if (!hv_dev->channel) | |
313 | return -ENODEV; | |
314 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
315 | return sprintf(buf, "%d\n", outbound.current_read_index); | |
316 | } | |
317 | static DEVICE_ATTR_RO(out_read_index); | |
318 | ||
319 | static ssize_t out_write_index_show(struct device *dev, | |
320 | struct device_attribute *dev_attr, | |
321 | char *buf) | |
322 | { | |
323 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
324 | struct hv_ring_buffer_debug_info outbound; | |
325 | ||
326 | if (!hv_dev->channel) | |
327 | return -ENODEV; | |
328 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
329 | return sprintf(buf, "%d\n", outbound.current_write_index); | |
330 | } | |
331 | static DEVICE_ATTR_RO(out_write_index); | |
332 | ||
333 | static ssize_t out_read_bytes_avail_show(struct device *dev, | |
334 | struct device_attribute *dev_attr, | |
335 | char *buf) | |
336 | { | |
337 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
338 | struct hv_ring_buffer_debug_info outbound; | |
339 | ||
340 | if (!hv_dev->channel) | |
341 | return -ENODEV; | |
342 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
343 | return sprintf(buf, "%d\n", outbound.bytes_avail_toread); | |
344 | } | |
345 | static DEVICE_ATTR_RO(out_read_bytes_avail); | |
346 | ||
347 | static ssize_t out_write_bytes_avail_show(struct device *dev, | |
348 | struct device_attribute *dev_attr, | |
349 | char *buf) | |
350 | { | |
351 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
352 | struct hv_ring_buffer_debug_info outbound; | |
353 | ||
354 | if (!hv_dev->channel) | |
355 | return -ENODEV; | |
356 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
357 | return sprintf(buf, "%d\n", outbound.bytes_avail_towrite); | |
358 | } | |
359 | static DEVICE_ATTR_RO(out_write_bytes_avail); | |
360 | ||
361 | static ssize_t in_intr_mask_show(struct device *dev, | |
362 | struct device_attribute *dev_attr, char *buf) | |
363 | { | |
364 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
365 | struct hv_ring_buffer_debug_info inbound; | |
366 | ||
367 | if (!hv_dev->channel) | |
368 | return -ENODEV; | |
369 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
370 | return sprintf(buf, "%d\n", inbound.current_interrupt_mask); | |
371 | } | |
372 | static DEVICE_ATTR_RO(in_intr_mask); | |
373 | ||
374 | static ssize_t in_read_index_show(struct device *dev, | |
375 | struct device_attribute *dev_attr, char *buf) | |
376 | { | |
377 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
378 | struct hv_ring_buffer_debug_info inbound; | |
379 | ||
380 | if (!hv_dev->channel) | |
381 | return -ENODEV; | |
382 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
383 | return sprintf(buf, "%d\n", inbound.current_read_index); | |
384 | } | |
385 | static DEVICE_ATTR_RO(in_read_index); | |
386 | ||
387 | static ssize_t in_write_index_show(struct device *dev, | |
388 | struct device_attribute *dev_attr, char *buf) | |
389 | { | |
390 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
391 | struct hv_ring_buffer_debug_info inbound; | |
392 | ||
393 | if (!hv_dev->channel) | |
394 | return -ENODEV; | |
395 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
396 | return sprintf(buf, "%d\n", inbound.current_write_index); | |
397 | } | |
398 | static DEVICE_ATTR_RO(in_write_index); | |
399 | ||
400 | static ssize_t in_read_bytes_avail_show(struct device *dev, | |
401 | struct device_attribute *dev_attr, | |
402 | char *buf) | |
403 | { | |
404 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
405 | struct hv_ring_buffer_debug_info inbound; | |
406 | ||
407 | if (!hv_dev->channel) | |
408 | return -ENODEV; | |
409 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
410 | return sprintf(buf, "%d\n", inbound.bytes_avail_toread); | |
411 | } | |
412 | static DEVICE_ATTR_RO(in_read_bytes_avail); | |
413 | ||
414 | static ssize_t in_write_bytes_avail_show(struct device *dev, | |
415 | struct device_attribute *dev_attr, | |
416 | char *buf) | |
417 | { | |
418 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
419 | struct hv_ring_buffer_debug_info inbound; | |
420 | ||
421 | if (!hv_dev->channel) | |
422 | return -ENODEV; | |
423 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
424 | return sprintf(buf, "%d\n", inbound.bytes_avail_towrite); | |
425 | } | |
426 | static DEVICE_ATTR_RO(in_write_bytes_avail); | |
427 | ||
042ab031 DC |
428 | static ssize_t channel_vp_mapping_show(struct device *dev, |
429 | struct device_attribute *dev_attr, | |
430 | char *buf) | |
431 | { | |
432 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
433 | struct vmbus_channel *channel = hv_dev->channel, *cur_sc; | |
434 | unsigned long flags; | |
435 | int buf_size = PAGE_SIZE, n_written, tot_written; | |
436 | struct list_head *cur; | |
437 | ||
438 | if (!channel) | |
439 | return -ENODEV; | |
440 | ||
441 | tot_written = snprintf(buf, buf_size, "%u:%u\n", | |
442 | channel->offermsg.child_relid, channel->target_cpu); | |
443 | ||
444 | spin_lock_irqsave(&channel->lock, flags); | |
445 | ||
446 | list_for_each(cur, &channel->sc_list) { | |
447 | if (tot_written >= buf_size - 1) | |
448 | break; | |
449 | ||
450 | cur_sc = list_entry(cur, struct vmbus_channel, sc_list); | |
451 | n_written = scnprintf(buf + tot_written, | |
452 | buf_size - tot_written, | |
453 | "%u:%u\n", | |
454 | cur_sc->offermsg.child_relid, | |
455 | cur_sc->target_cpu); | |
456 | tot_written += n_written; | |
457 | } | |
458 | ||
459 | spin_unlock_irqrestore(&channel->lock, flags); | |
460 | ||
461 | return tot_written; | |
462 | } | |
463 | static DEVICE_ATTR_RO(channel_vp_mapping); | |
464 | ||
7047f17d S |
465 | static ssize_t vendor_show(struct device *dev, |
466 | struct device_attribute *dev_attr, | |
467 | char *buf) | |
468 | { | |
469 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
470 | return sprintf(buf, "0x%x\n", hv_dev->vendor_id); | |
471 | } | |
472 | static DEVICE_ATTR_RO(vendor); | |
473 | ||
474 | static ssize_t device_show(struct device *dev, | |
475 | struct device_attribute *dev_attr, | |
476 | char *buf) | |
477 | { | |
478 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
479 | return sprintf(buf, "0x%x\n", hv_dev->device_id); | |
480 | } | |
481 | static DEVICE_ATTR_RO(device); | |
482 | ||
98f4c651 | 483 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
fc76936d | 484 | static struct attribute *vmbus_dev_attrs[] = { |
03f3a910 | 485 | &dev_attr_id.attr, |
a8fb5f3d | 486 | &dev_attr_state.attr, |
5ffd00e2 | 487 | &dev_attr_monitor_id.attr, |
68234c04 | 488 | &dev_attr_class_id.attr, |
7c55e1d0 | 489 | &dev_attr_device_id.attr, |
647fa371 | 490 | &dev_attr_modalias.attr, |
76c52bbe GKH |
491 | &dev_attr_server_monitor_pending.attr, |
492 | &dev_attr_client_monitor_pending.attr, | |
1cee272b GKH |
493 | &dev_attr_server_monitor_latency.attr, |
494 | &dev_attr_client_monitor_latency.attr, | |
4947c745 GKH |
495 | &dev_attr_server_monitor_conn_id.attr, |
496 | &dev_attr_client_monitor_conn_id.attr, | |
98f4c651 GKH |
497 | &dev_attr_out_intr_mask.attr, |
498 | &dev_attr_out_read_index.attr, | |
499 | &dev_attr_out_write_index.attr, | |
500 | &dev_attr_out_read_bytes_avail.attr, | |
501 | &dev_attr_out_write_bytes_avail.attr, | |
502 | &dev_attr_in_intr_mask.attr, | |
503 | &dev_attr_in_read_index.attr, | |
504 | &dev_attr_in_write_index.attr, | |
505 | &dev_attr_in_read_bytes_avail.attr, | |
506 | &dev_attr_in_write_bytes_avail.attr, | |
042ab031 | 507 | &dev_attr_channel_vp_mapping.attr, |
7047f17d S |
508 | &dev_attr_vendor.attr, |
509 | &dev_attr_device.attr, | |
03f3a910 GKH |
510 | NULL, |
511 | }; | |
fc76936d | 512 | ATTRIBUTE_GROUPS(vmbus_dev); |
03f3a910 | 513 | |
adde2487 S |
514 | /* |
515 | * vmbus_uevent - add uevent for our device | |
516 | * | |
517 | * This routine is invoked when a device is added or removed on the vmbus to | |
518 | * generate a uevent to udev in the userspace. The udev will then look at its | |
519 | * rule and the uevent generated here to load the appropriate driver | |
0ddda660 S |
520 | * |
521 | * The alias string will be of the form vmbus:guid where guid is the string | |
522 | * representation of the device guid (each byte of the guid will be | |
523 | * represented with two hex characters. | |
adde2487 S |
524 | */ |
525 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) | |
526 | { | |
527 | struct hv_device *dev = device_to_hv_device(device); | |
fd776ba9 OH |
528 | int ret; |
529 | char alias_name[VMBUS_ALIAS_LEN + 1]; | |
0ddda660 | 530 | |
fd776ba9 | 531 | print_alias_name(dev, alias_name); |
0ddda660 S |
532 | ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name); |
533 | return ret; | |
adde2487 S |
534 | } |
535 | ||
1b9d48f2 | 536 | static const uuid_le null_guid; |
5841a829 | 537 | |
af3ff643 | 538 | static inline bool is_null_guid(const uuid_le *guid) |
5841a829 | 539 | { |
4ae92508 | 540 | if (uuid_le_cmp(*guid, null_guid)) |
5841a829 S |
541 | return false; |
542 | return true; | |
543 | } | |
544 | ||
3037a7b6 S |
545 | /* |
546 | * Return a matching hv_vmbus_device_id pointer. | |
547 | * If there is no match, return NULL. | |
548 | */ | |
fc76936d | 549 | static const struct hv_vmbus_device_id *hv_vmbus_get_id(struct hv_driver *drv, |
af3ff643 | 550 | const uuid_le *guid) |
3037a7b6 | 551 | { |
fc76936d SH |
552 | const struct hv_vmbus_device_id *id = NULL; |
553 | struct vmbus_dynid *dynid; | |
554 | ||
555 | /* Look at the dynamic ids first, before the static ones */ | |
556 | spin_lock(&drv->dynids.lock); | |
557 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
558 | if (!uuid_le_cmp(dynid->id.guid, *guid)) { | |
559 | id = &dynid->id; | |
560 | break; | |
561 | } | |
562 | } | |
563 | spin_unlock(&drv->dynids.lock); | |
564 | ||
565 | if (id) | |
566 | return id; | |
567 | ||
568 | id = drv->id_table; | |
569 | if (id == NULL) | |
570 | return NULL; /* empty device table */ | |
571 | ||
af3ff643 | 572 | for (; !is_null_guid(&id->guid); id++) |
4ae92508 | 573 | if (!uuid_le_cmp(id->guid, *guid)) |
3037a7b6 S |
574 | return id; |
575 | ||
576 | return NULL; | |
577 | } | |
578 | ||
fc76936d SH |
579 | /* vmbus_add_dynid - add a new device ID to this driver and re-probe devices */ |
580 | static int vmbus_add_dynid(struct hv_driver *drv, uuid_le *guid) | |
581 | { | |
582 | struct vmbus_dynid *dynid; | |
583 | ||
584 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); | |
585 | if (!dynid) | |
586 | return -ENOMEM; | |
587 | ||
588 | dynid->id.guid = *guid; | |
589 | ||
590 | spin_lock(&drv->dynids.lock); | |
591 | list_add_tail(&dynid->node, &drv->dynids.list); | |
592 | spin_unlock(&drv->dynids.lock); | |
593 | ||
594 | return driver_attach(&drv->driver); | |
595 | } | |
596 | ||
597 | static void vmbus_free_dynids(struct hv_driver *drv) | |
598 | { | |
599 | struct vmbus_dynid *dynid, *n; | |
600 | ||
601 | spin_lock(&drv->dynids.lock); | |
602 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
603 | list_del(&dynid->node); | |
604 | kfree(dynid); | |
605 | } | |
606 | spin_unlock(&drv->dynids.lock); | |
607 | } | |
608 | ||
609 | /* Parse string of form: 1b4e28ba-2fa1-11d2-883f-b9a761bde3f */ | |
610 | static int get_uuid_le(const char *str, uuid_le *uu) | |
611 | { | |
612 | unsigned int b[16]; | |
613 | int i; | |
614 | ||
615 | if (strlen(str) < 37) | |
616 | return -1; | |
617 | ||
618 | for (i = 0; i < 36; i++) { | |
619 | switch (i) { | |
620 | case 8: case 13: case 18: case 23: | |
621 | if (str[i] != '-') | |
622 | return -1; | |
623 | break; | |
624 | default: | |
625 | if (!isxdigit(str[i])) | |
626 | return -1; | |
627 | } | |
628 | } | |
629 | ||
630 | /* unparse little endian output byte order */ | |
631 | if (sscanf(str, | |
632 | "%2x%2x%2x%2x-%2x%2x-%2x%2x-%2x%2x-%2x%2x%2x%2x%2x%2x", | |
633 | &b[3], &b[2], &b[1], &b[0], | |
634 | &b[5], &b[4], &b[7], &b[6], &b[8], &b[9], | |
635 | &b[10], &b[11], &b[12], &b[13], &b[14], &b[15]) != 16) | |
636 | return -1; | |
637 | ||
638 | for (i = 0; i < 16; i++) | |
639 | uu->b[i] = b[i]; | |
640 | return 0; | |
641 | } | |
642 | ||
643 | /* | |
644 | * store_new_id - sysfs frontend to vmbus_add_dynid() | |
645 | * | |
646 | * Allow GUIDs to be added to an existing driver via sysfs. | |
647 | */ | |
648 | static ssize_t new_id_store(struct device_driver *driver, const char *buf, | |
649 | size_t count) | |
650 | { | |
651 | struct hv_driver *drv = drv_to_hv_drv(driver); | |
652 | uuid_le guid = NULL_UUID_LE; | |
653 | ssize_t retval; | |
654 | ||
655 | if (get_uuid_le(buf, &guid) != 0) | |
656 | return -EINVAL; | |
657 | ||
658 | if (hv_vmbus_get_id(drv, &guid)) | |
659 | return -EEXIST; | |
660 | ||
661 | retval = vmbus_add_dynid(drv, &guid); | |
662 | if (retval) | |
663 | return retval; | |
664 | return count; | |
665 | } | |
666 | static DRIVER_ATTR_WO(new_id); | |
667 | ||
668 | /* | |
669 | * store_remove_id - remove a PCI device ID from this driver | |
670 | * | |
671 | * Removes a dynamic pci device ID to this driver. | |
672 | */ | |
673 | static ssize_t remove_id_store(struct device_driver *driver, const char *buf, | |
674 | size_t count) | |
675 | { | |
676 | struct hv_driver *drv = drv_to_hv_drv(driver); | |
677 | struct vmbus_dynid *dynid, *n; | |
678 | uuid_le guid = NULL_UUID_LE; | |
679 | size_t retval = -ENODEV; | |
680 | ||
681 | if (get_uuid_le(buf, &guid)) | |
682 | return -EINVAL; | |
683 | ||
684 | spin_lock(&drv->dynids.lock); | |
685 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
686 | struct hv_vmbus_device_id *id = &dynid->id; | |
687 | ||
688 | if (!uuid_le_cmp(id->guid, guid)) { | |
689 | list_del(&dynid->node); | |
690 | kfree(dynid); | |
691 | retval = count; | |
692 | break; | |
693 | } | |
694 | } | |
695 | spin_unlock(&drv->dynids.lock); | |
696 | ||
697 | return retval; | |
698 | } | |
699 | static DRIVER_ATTR_WO(remove_id); | |
700 | ||
701 | static struct attribute *vmbus_drv_attrs[] = { | |
702 | &driver_attr_new_id.attr, | |
703 | &driver_attr_remove_id.attr, | |
704 | NULL, | |
705 | }; | |
706 | ATTRIBUTE_GROUPS(vmbus_drv); | |
3037a7b6 | 707 | |
b7fc147b S |
708 | |
709 | /* | |
710 | * vmbus_match - Attempt to match the specified device to the specified driver | |
711 | */ | |
712 | static int vmbus_match(struct device *device, struct device_driver *driver) | |
713 | { | |
b7fc147b | 714 | struct hv_driver *drv = drv_to_hv_drv(driver); |
e8e27047 | 715 | struct hv_device *hv_dev = device_to_hv_device(device); |
b7fc147b | 716 | |
8981da32 DC |
717 | /* The hv_sock driver handles all hv_sock offers. */ |
718 | if (is_hvsock_channel(hv_dev->channel)) | |
719 | return drv->hvsock; | |
720 | ||
fc76936d | 721 | if (hv_vmbus_get_id(drv, &hv_dev->dev_type)) |
3037a7b6 | 722 | return 1; |
de632a2b | 723 | |
5841a829 | 724 | return 0; |
b7fc147b S |
725 | } |
726 | ||
f1f0d67b S |
727 | /* |
728 | * vmbus_probe - Add the new vmbus's child device | |
729 | */ | |
730 | static int vmbus_probe(struct device *child_device) | |
731 | { | |
732 | int ret = 0; | |
733 | struct hv_driver *drv = | |
734 | drv_to_hv_drv(child_device->driver); | |
9efd21e1 | 735 | struct hv_device *dev = device_to_hv_device(child_device); |
84946899 | 736 | const struct hv_vmbus_device_id *dev_id; |
f1f0d67b | 737 | |
fc76936d | 738 | dev_id = hv_vmbus_get_id(drv, &dev->dev_type); |
9efd21e1 | 739 | if (drv->probe) { |
84946899 | 740 | ret = drv->probe(dev, dev_id); |
b14a7b30 | 741 | if (ret != 0) |
0a46618d HJ |
742 | pr_err("probe failed for device %s (%d)\n", |
743 | dev_name(child_device), ret); | |
f1f0d67b | 744 | |
f1f0d67b | 745 | } else { |
0a46618d HJ |
746 | pr_err("probe not set for driver %s\n", |
747 | dev_name(child_device)); | |
6de925b1 | 748 | ret = -ENODEV; |
f1f0d67b S |
749 | } |
750 | return ret; | |
751 | } | |
752 | ||
c5dce3db S |
753 | /* |
754 | * vmbus_remove - Remove a vmbus device | |
755 | */ | |
756 | static int vmbus_remove(struct device *child_device) | |
757 | { | |
d15a0301 | 758 | struct hv_driver *drv; |
415b023a | 759 | struct hv_device *dev = device_to_hv_device(child_device); |
c5dce3db | 760 | |
d15a0301 S |
761 | if (child_device->driver) { |
762 | drv = drv_to_hv_drv(child_device->driver); | |
763 | if (drv->remove) | |
764 | drv->remove(dev); | |
d15a0301 | 765 | } |
c5dce3db S |
766 | |
767 | return 0; | |
768 | } | |
769 | ||
eb1bb259 S |
770 | |
771 | /* | |
772 | * vmbus_shutdown - Shutdown a vmbus device | |
773 | */ | |
774 | static void vmbus_shutdown(struct device *child_device) | |
775 | { | |
776 | struct hv_driver *drv; | |
ca6887fb | 777 | struct hv_device *dev = device_to_hv_device(child_device); |
eb1bb259 S |
778 | |
779 | ||
780 | /* The device may not be attached yet */ | |
781 | if (!child_device->driver) | |
782 | return; | |
783 | ||
784 | drv = drv_to_hv_drv(child_device->driver); | |
785 | ||
ca6887fb S |
786 | if (drv->shutdown) |
787 | drv->shutdown(dev); | |
eb1bb259 S |
788 | |
789 | return; | |
790 | } | |
791 | ||
086e7a56 S |
792 | |
793 | /* | |
794 | * vmbus_device_release - Final callback release of the vmbus child device | |
795 | */ | |
796 | static void vmbus_device_release(struct device *device) | |
797 | { | |
e8e27047 | 798 | struct hv_device *hv_dev = device_to_hv_device(device); |
34c6801e | 799 | struct vmbus_channel *channel = hv_dev->channel; |
086e7a56 | 800 | |
34c6801e DC |
801 | hv_process_channel_removal(channel, |
802 | channel->offermsg.child_relid); | |
e8e27047 | 803 | kfree(hv_dev); |
086e7a56 S |
804 | |
805 | } | |
806 | ||
454f18a9 | 807 | /* The one and only one */ |
9adcac5c S |
808 | static struct bus_type hv_bus = { |
809 | .name = "vmbus", | |
810 | .match = vmbus_match, | |
811 | .shutdown = vmbus_shutdown, | |
812 | .remove = vmbus_remove, | |
813 | .probe = vmbus_probe, | |
814 | .uevent = vmbus_uevent, | |
fc76936d SH |
815 | .dev_groups = vmbus_dev_groups, |
816 | .drv_groups = vmbus_drv_groups, | |
3e7ee490 HJ |
817 | }; |
818 | ||
bf6506f6 TT |
819 | struct onmessage_work_context { |
820 | struct work_struct work; | |
821 | struct hv_message msg; | |
822 | }; | |
823 | ||
824 | static void vmbus_onmessage_work(struct work_struct *work) | |
825 | { | |
826 | struct onmessage_work_context *ctx; | |
827 | ||
09a19628 VK |
828 | /* Do not process messages if we're in DISCONNECTED state */ |
829 | if (vmbus_connection.conn_state == DISCONNECTED) | |
830 | return; | |
831 | ||
bf6506f6 TT |
832 | ctx = container_of(work, struct onmessage_work_context, |
833 | work); | |
834 | vmbus_onmessage(&ctx->msg); | |
835 | kfree(ctx); | |
836 | } | |
837 | ||
d8a60e00 | 838 | static void hv_process_timer_expiration(struct hv_message *msg, int cpu) |
4061ed9e S |
839 | { |
840 | struct clock_event_device *dev = hv_context.clk_evt[cpu]; | |
841 | ||
842 | if (dev->event_handler) | |
843 | dev->event_handler(dev); | |
844 | ||
cd95aad5 | 845 | vmbus_signal_eom(msg, HVMSG_TIMER_EXPIRED); |
4061ed9e S |
846 | } |
847 | ||
d81274aa | 848 | void vmbus_on_msg_dpc(unsigned long data) |
36199a99 GKH |
849 | { |
850 | int cpu = smp_processor_id(); | |
851 | void *page_addr = hv_context.synic_message_page[cpu]; | |
852 | struct hv_message *msg = (struct hv_message *)page_addr + | |
853 | VMBUS_MESSAGE_SINT; | |
652594c7 DC |
854 | struct vmbus_channel_message_header *hdr; |
855 | struct vmbus_channel_message_table_entry *entry; | |
bf6506f6 | 856 | struct onmessage_work_context *ctx; |
cd95aad5 | 857 | u32 message_type = msg->header.message_type; |
36199a99 | 858 | |
cd95aad5 | 859 | if (message_type == HVMSG_NONE) |
7be3e169 VK |
860 | /* no msg */ |
861 | return; | |
652594c7 | 862 | |
7be3e169 | 863 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
652594c7 | 864 | |
7be3e169 VK |
865 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
866 | WARN_ONCE(1, "unknown msgtype=%d\n", hdr->msgtype); | |
867 | goto msg_handled; | |
868 | } | |
652594c7 | 869 | |
7be3e169 VK |
870 | entry = &channel_message_table[hdr->msgtype]; |
871 | if (entry->handler_type == VMHT_BLOCKING) { | |
872 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); | |
873 | if (ctx == NULL) | |
874 | return; | |
652594c7 | 875 | |
7be3e169 VK |
876 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
877 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
652594c7 | 878 | |
7be3e169 VK |
879 | queue_work(vmbus_connection.work_queue, &ctx->work); |
880 | } else | |
881 | entry->message_handler(hdr); | |
36199a99 | 882 | |
652594c7 | 883 | msg_handled: |
cd95aad5 | 884 | vmbus_signal_eom(msg, message_type); |
36199a99 GKH |
885 | } |
886 | ||
76d388cd | 887 | static void vmbus_isr(void) |
36199a99 | 888 | { |
36199a99 GKH |
889 | int cpu = smp_processor_id(); |
890 | void *page_addr; | |
891 | struct hv_message *msg; | |
892 | union hv_synic_event_flags *event; | |
ae4636e6 | 893 | bool handled = false; |
36199a99 | 894 | |
5ab05951 S |
895 | page_addr = hv_context.synic_event_page[cpu]; |
896 | if (page_addr == NULL) | |
76d388cd | 897 | return; |
5ab05951 S |
898 | |
899 | event = (union hv_synic_event_flags *)page_addr + | |
900 | VMBUS_MESSAGE_SINT; | |
7341d908 S |
901 | /* |
902 | * Check for events before checking for messages. This is the order | |
903 | * in which events and messages are checked in Windows guests on | |
904 | * Hyper-V, and the Windows team suggested we do the same. | |
905 | */ | |
36199a99 | 906 | |
6552ecd7 S |
907 | if ((vmbus_proto_version == VERSION_WS2008) || |
908 | (vmbus_proto_version == VERSION_WIN7)) { | |
36199a99 | 909 | |
6552ecd7 S |
910 | /* Since we are a child, we only need to check bit 0 */ |
911 | if (sync_test_and_clear_bit(0, | |
912 | (unsigned long *) &event->flags32[0])) { | |
913 | handled = true; | |
914 | } | |
915 | } else { | |
916 | /* | |
917 | * Our host is win8 or above. The signaling mechanism | |
918 | * has changed and we can directly look at the event page. | |
919 | * If bit n is set then we have an interrup on the channel | |
920 | * whose id is n. | |
921 | */ | |
ae4636e6 | 922 | handled = true; |
ae4636e6 | 923 | } |
793be9c7 | 924 | |
6552ecd7 | 925 | if (handled) |
db11f12a | 926 | tasklet_schedule(hv_context.event_dpc[cpu]); |
6552ecd7 S |
927 | |
928 | ||
7341d908 S |
929 | page_addr = hv_context.synic_message_page[cpu]; |
930 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
931 | ||
932 | /* Check if there are actual msgs to be processed */ | |
4061ed9e S |
933 | if (msg->header.message_type != HVMSG_NONE) { |
934 | if (msg->header.message_type == HVMSG_TIMER_EXPIRED) | |
935 | hv_process_timer_expiration(msg, cpu); | |
936 | else | |
d81274aa | 937 | tasklet_schedule(hv_context.msg_dpc[cpu]); |
4061ed9e | 938 | } |
4b44f2d1 SM |
939 | |
940 | add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0); | |
793be9c7 S |
941 | } |
942 | ||
e513229b | 943 | |
3e189519 | 944 | /* |
90c9960e GKH |
945 | * vmbus_bus_init -Main vmbus driver initialization routine. |
946 | * | |
947 | * Here, we | |
0686e4f4 | 948 | * - initialize the vmbus driver context |
0686e4f4 | 949 | * - invoke the vmbus hv main init routine |
0686e4f4 | 950 | * - retrieve the channel offers |
90c9960e | 951 | */ |
efc26722 | 952 | static int vmbus_bus_init(void) |
3e7ee490 | 953 | { |
90c9960e | 954 | int ret; |
3e7ee490 | 955 | |
6d26e38f GKH |
956 | /* Hypervisor initialization...setup hypercall page..etc */ |
957 | ret = hv_init(); | |
90c9960e | 958 | if (ret != 0) { |
0a46618d | 959 | pr_err("Unable to initialize the hypervisor - 0x%x\n", ret); |
d6c1c5de | 960 | return ret; |
3e7ee490 HJ |
961 | } |
962 | ||
9adcac5c | 963 | ret = bus_register(&hv_bus); |
d6c1c5de | 964 | if (ret) |
27a01f1e | 965 | return ret; |
3e7ee490 | 966 | |
76d388cd | 967 | hv_setup_vmbus_irq(vmbus_isr); |
3e7ee490 | 968 | |
2608fb65 JW |
969 | ret = hv_synic_alloc(); |
970 | if (ret) | |
971 | goto err_alloc; | |
800b6902 | 972 | /* |
302a3c0f | 973 | * Initialize the per-cpu interrupt state and |
800b6902 S |
974 | * connect to the host. |
975 | */ | |
fdf5149c VK |
976 | ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/hyperv:online", |
977 | hv_synic_init, hv_synic_cleanup); | |
978 | if (ret < 0) | |
979 | goto err_alloc; | |
980 | hyperv_cpuhp_online = ret; | |
981 | ||
800b6902 | 982 | ret = vmbus_connect(); |
8b9987e9 | 983 | if (ret) |
17efbee8 | 984 | goto err_connect; |
800b6902 | 985 | |
96c1d058 NM |
986 | /* |
987 | * Only register if the crash MSRs are available | |
988 | */ | |
cc2dd402 | 989 | if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) { |
510f7aef | 990 | register_die_notifier(&hyperv_die_block); |
96c1d058 NM |
991 | atomic_notifier_chain_register(&panic_notifier_list, |
992 | &hyperv_panic_block); | |
993 | } | |
994 | ||
2d6e882b | 995 | vmbus_request_offers(); |
8b5d6d3b | 996 | |
d6c1c5de | 997 | return 0; |
8b9987e9 | 998 | |
17efbee8 | 999 | err_connect: |
fdf5149c | 1000 | cpuhp_remove_state(hyperv_cpuhp_online); |
2608fb65 JW |
1001 | err_alloc: |
1002 | hv_synic_free(); | |
76d388cd | 1003 | hv_remove_vmbus_irq(); |
8b9987e9 | 1004 | |
8b9987e9 S |
1005 | bus_unregister(&hv_bus); |
1006 | ||
8b9987e9 | 1007 | return ret; |
3e7ee490 HJ |
1008 | } |
1009 | ||
90c9960e | 1010 | /** |
35464483 JO |
1011 | * __vmbus_child_driver_register() - Register a vmbus's driver |
1012 | * @hv_driver: Pointer to driver structure you want to register | |
768fa219 GKH |
1013 | * @owner: owner module of the drv |
1014 | * @mod_name: module name string | |
3e189519 HJ |
1015 | * |
1016 | * Registers the given driver with Linux through the 'driver_register()' call | |
768fa219 | 1017 | * and sets up the hyper-v vmbus handling for this driver. |
3e189519 HJ |
1018 | * It will return the state of the 'driver_register()' call. |
1019 | * | |
90c9960e | 1020 | */ |
768fa219 | 1021 | int __vmbus_driver_register(struct hv_driver *hv_driver, struct module *owner, const char *mod_name) |
3e7ee490 | 1022 | { |
5d48a1c2 | 1023 | int ret; |
3e7ee490 | 1024 | |
768fa219 | 1025 | pr_info("registering driver %s\n", hv_driver->name); |
3e7ee490 | 1026 | |
cf6a2eac S |
1027 | ret = vmbus_exists(); |
1028 | if (ret < 0) | |
1029 | return ret; | |
1030 | ||
768fa219 GKH |
1031 | hv_driver->driver.name = hv_driver->name; |
1032 | hv_driver->driver.owner = owner; | |
1033 | hv_driver->driver.mod_name = mod_name; | |
1034 | hv_driver->driver.bus = &hv_bus; | |
3e7ee490 | 1035 | |
fc76936d SH |
1036 | spin_lock_init(&hv_driver->dynids.lock); |
1037 | INIT_LIST_HEAD(&hv_driver->dynids.list); | |
1038 | ||
768fa219 | 1039 | ret = driver_register(&hv_driver->driver); |
3e7ee490 | 1040 | |
5d48a1c2 | 1041 | return ret; |
3e7ee490 | 1042 | } |
768fa219 | 1043 | EXPORT_SYMBOL_GPL(__vmbus_driver_register); |
3e7ee490 | 1044 | |
90c9960e | 1045 | /** |
768fa219 | 1046 | * vmbus_driver_unregister() - Unregister a vmbus's driver |
35464483 JO |
1047 | * @hv_driver: Pointer to driver structure you want to |
1048 | * un-register | |
3e189519 | 1049 | * |
768fa219 GKH |
1050 | * Un-register the given driver that was previous registered with a call to |
1051 | * vmbus_driver_register() | |
90c9960e | 1052 | */ |
768fa219 | 1053 | void vmbus_driver_unregister(struct hv_driver *hv_driver) |
3e7ee490 | 1054 | { |
768fa219 | 1055 | pr_info("unregistering driver %s\n", hv_driver->name); |
3e7ee490 | 1056 | |
fc76936d | 1057 | if (!vmbus_exists()) { |
8f257a14 | 1058 | driver_unregister(&hv_driver->driver); |
fc76936d SH |
1059 | vmbus_free_dynids(hv_driver); |
1060 | } | |
3e7ee490 | 1061 | } |
768fa219 | 1062 | EXPORT_SYMBOL_GPL(vmbus_driver_unregister); |
3e7ee490 | 1063 | |
3e189519 | 1064 | /* |
f2c73011 | 1065 | * vmbus_device_create - Creates and registers a new child device |
3e189519 | 1066 | * on the vmbus. |
90c9960e | 1067 | */ |
1b9d48f2 | 1068 | struct hv_device *vmbus_device_create(const uuid_le *type, |
1069 | const uuid_le *instance, | |
1070 | struct vmbus_channel *channel) | |
3e7ee490 | 1071 | { |
3d3b5518 | 1072 | struct hv_device *child_device_obj; |
3e7ee490 | 1073 | |
6bad88da S |
1074 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
1075 | if (!child_device_obj) { | |
0a46618d | 1076 | pr_err("Unable to allocate device object for child device\n"); |
3e7ee490 HJ |
1077 | return NULL; |
1078 | } | |
1079 | ||
cae5b843 | 1080 | child_device_obj->channel = channel; |
358d2ee2 | 1081 | memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le)); |
ca623ad3 | 1082 | memcpy(&child_device_obj->dev_instance, instance, |
358d2ee2 | 1083 | sizeof(uuid_le)); |
7047f17d | 1084 | child_device_obj->vendor_id = 0x1414; /* MSFT vendor ID */ |
3e7ee490 | 1085 | |
3e7ee490 | 1086 | |
3e7ee490 HJ |
1087 | return child_device_obj; |
1088 | } | |
1089 | ||
3e189519 | 1090 | /* |
22794281 | 1091 | * vmbus_device_register - Register the child device |
90c9960e | 1092 | */ |
22794281 | 1093 | int vmbus_device_register(struct hv_device *child_device_obj) |
3e7ee490 | 1094 | { |
90c9960e | 1095 | int ret = 0; |
6bad88da | 1096 | |
f6b2db08 | 1097 | dev_set_name(&child_device_obj->device, "%pUl", |
b294809d | 1098 | child_device_obj->channel->offermsg.offer.if_instance.b); |
3e7ee490 | 1099 | |
0bce28b6 | 1100 | child_device_obj->device.bus = &hv_bus; |
607c1a11 | 1101 | child_device_obj->device.parent = &hv_acpi_dev->dev; |
6bad88da | 1102 | child_device_obj->device.release = vmbus_device_release; |
3e7ee490 | 1103 | |
90c9960e GKH |
1104 | /* |
1105 | * Register with the LDM. This will kick off the driver/device | |
1106 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
1107 | */ | |
6bad88da | 1108 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 1109 | |
3e7ee490 | 1110 | if (ret) |
0a46618d | 1111 | pr_err("Unable to register child device\n"); |
3e7ee490 | 1112 | else |
84672369 | 1113 | pr_debug("child device %s registered\n", |
0a46618d | 1114 | dev_name(&child_device_obj->device)); |
3e7ee490 | 1115 | |
3e7ee490 HJ |
1116 | return ret; |
1117 | } | |
1118 | ||
3e189519 | 1119 | /* |
696453ba | 1120 | * vmbus_device_unregister - Remove the specified child device |
3e189519 | 1121 | * from the vmbus. |
90c9960e | 1122 | */ |
696453ba | 1123 | void vmbus_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 1124 | { |
84672369 FS |
1125 | pr_debug("child device %s unregistered\n", |
1126 | dev_name(&device_obj->device)); | |
1127 | ||
90c9960e GKH |
1128 | /* |
1129 | * Kick off the process of unregistering the device. | |
1130 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
1131 | */ | |
6bad88da | 1132 | device_unregister(&device_obj->device); |
3e7ee490 HJ |
1133 | } |
1134 | ||
3e7ee490 | 1135 | |
b0069f43 | 1136 | /* |
7f163a6f | 1137 | * VMBUS is an acpi enumerated device. Get the information we |
90f34535 | 1138 | * need from DSDT. |
b0069f43 | 1139 | */ |
7f163a6f | 1140 | #define VTPM_BASE_ADDRESS 0xfed40000 |
90f34535 | 1141 | static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx) |
b0069f43 | 1142 | { |
7f163a6f JO |
1143 | resource_size_t start = 0; |
1144 | resource_size_t end = 0; | |
1145 | struct resource *new_res; | |
1146 | struct resource **old_res = &hyperv_mmio; | |
1147 | struct resource **prev_res = NULL; | |
1148 | ||
90f34535 | 1149 | switch (res->type) { |
7f163a6f JO |
1150 | |
1151 | /* | |
1152 | * "Address" descriptors are for bus windows. Ignore | |
1153 | * "memory" descriptors, which are for registers on | |
1154 | * devices. | |
1155 | */ | |
1156 | case ACPI_RESOURCE_TYPE_ADDRESS32: | |
1157 | start = res->data.address32.address.minimum; | |
1158 | end = res->data.address32.address.maximum; | |
4eb923f8 | 1159 | break; |
b0069f43 | 1160 | |
90f34535 | 1161 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
7f163a6f JO |
1162 | start = res->data.address64.address.minimum; |
1163 | end = res->data.address64.address.maximum; | |
4eb923f8 | 1164 | break; |
7f163a6f JO |
1165 | |
1166 | default: | |
1167 | /* Unused resource type */ | |
1168 | return AE_OK; | |
1169 | ||
b0069f43 | 1170 | } |
7f163a6f JO |
1171 | /* |
1172 | * Ignore ranges that are below 1MB, as they're not | |
1173 | * necessary or useful here. | |
1174 | */ | |
1175 | if (end < 0x100000) | |
1176 | return AE_OK; | |
1177 | ||
1178 | new_res = kzalloc(sizeof(*new_res), GFP_ATOMIC); | |
1179 | if (!new_res) | |
1180 | return AE_NO_MEMORY; | |
1181 | ||
1182 | /* If this range overlaps the virtual TPM, truncate it. */ | |
1183 | if (end > VTPM_BASE_ADDRESS && start < VTPM_BASE_ADDRESS) | |
1184 | end = VTPM_BASE_ADDRESS; | |
1185 | ||
1186 | new_res->name = "hyperv mmio"; | |
1187 | new_res->flags = IORESOURCE_MEM; | |
1188 | new_res->start = start; | |
1189 | new_res->end = end; | |
1190 | ||
40f26f31 | 1191 | /* |
40f26f31 JO |
1192 | * If two ranges are adjacent, merge them. |
1193 | */ | |
7f163a6f JO |
1194 | do { |
1195 | if (!*old_res) { | |
1196 | *old_res = new_res; | |
1197 | break; | |
1198 | } | |
1199 | ||
40f26f31 JO |
1200 | if (((*old_res)->end + 1) == new_res->start) { |
1201 | (*old_res)->end = new_res->end; | |
1202 | kfree(new_res); | |
1203 | break; | |
1204 | } | |
1205 | ||
1206 | if ((*old_res)->start == new_res->end + 1) { | |
1207 | (*old_res)->start = new_res->start; | |
1208 | kfree(new_res); | |
1209 | break; | |
1210 | } | |
1211 | ||
23a06831 | 1212 | if ((*old_res)->start > new_res->end) { |
7f163a6f JO |
1213 | new_res->sibling = *old_res; |
1214 | if (prev_res) | |
1215 | (*prev_res)->sibling = new_res; | |
1216 | *old_res = new_res; | |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | prev_res = old_res; | |
1221 | old_res = &(*old_res)->sibling; | |
1222 | ||
1223 | } while (1); | |
b0069f43 S |
1224 | |
1225 | return AE_OK; | |
1226 | } | |
1227 | ||
7f163a6f JO |
1228 | static int vmbus_acpi_remove(struct acpi_device *device) |
1229 | { | |
1230 | struct resource *cur_res; | |
1231 | struct resource *next_res; | |
1232 | ||
1233 | if (hyperv_mmio) { | |
6d146aef JO |
1234 | if (fb_mmio) { |
1235 | __release_region(hyperv_mmio, fb_mmio->start, | |
1236 | resource_size(fb_mmio)); | |
1237 | fb_mmio = NULL; | |
1238 | } | |
1239 | ||
7f163a6f JO |
1240 | for (cur_res = hyperv_mmio; cur_res; cur_res = next_res) { |
1241 | next_res = cur_res->sibling; | |
1242 | kfree(cur_res); | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
6d146aef JO |
1249 | static void vmbus_reserve_fb(void) |
1250 | { | |
1251 | int size; | |
1252 | /* | |
1253 | * Make a claim for the frame buffer in the resource tree under the | |
1254 | * first node, which will be the one below 4GB. The length seems to | |
1255 | * be underreported, particularly in a Generation 1 VM. So start out | |
1256 | * reserving a larger area and make it smaller until it succeeds. | |
1257 | */ | |
1258 | ||
1259 | if (screen_info.lfb_base) { | |
1260 | if (efi_enabled(EFI_BOOT)) | |
1261 | size = max_t(__u32, screen_info.lfb_size, 0x800000); | |
1262 | else | |
1263 | size = max_t(__u32, screen_info.lfb_size, 0x4000000); | |
1264 | ||
1265 | for (; !fb_mmio && (size >= 0x100000); size >>= 1) { | |
1266 | fb_mmio = __request_region(hyperv_mmio, | |
1267 | screen_info.lfb_base, size, | |
1268 | fb_mmio_name, 0); | |
1269 | } | |
1270 | } | |
1271 | } | |
1272 | ||
35464483 JO |
1273 | /** |
1274 | * vmbus_allocate_mmio() - Pick a memory-mapped I/O range. | |
1275 | * @new: If successful, supplied a pointer to the | |
1276 | * allocated MMIO space. | |
1277 | * @device_obj: Identifies the caller | |
1278 | * @min: Minimum guest physical address of the | |
1279 | * allocation | |
1280 | * @max: Maximum guest physical address | |
1281 | * @size: Size of the range to be allocated | |
1282 | * @align: Alignment of the range to be allocated | |
1283 | * @fb_overlap_ok: Whether this allocation can be allowed | |
1284 | * to overlap the video frame buffer. | |
1285 | * | |
1286 | * This function walks the resources granted to VMBus by the | |
1287 | * _CRS object in the ACPI namespace underneath the parent | |
1288 | * "bridge" whether that's a root PCI bus in the Generation 1 | |
1289 | * case or a Module Device in the Generation 2 case. It then | |
1290 | * attempts to allocate from the global MMIO pool in a way that | |
1291 | * matches the constraints supplied in these parameters and by | |
1292 | * that _CRS. | |
1293 | * | |
1294 | * Return: 0 on success, -errno on failure | |
1295 | */ | |
1296 | int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, | |
1297 | resource_size_t min, resource_size_t max, | |
1298 | resource_size_t size, resource_size_t align, | |
1299 | bool fb_overlap_ok) | |
1300 | { | |
be000f93 | 1301 | struct resource *iter, *shadow; |
ea37a6b8 | 1302 | resource_size_t range_min, range_max, start; |
35464483 | 1303 | const char *dev_n = dev_name(&device_obj->device); |
ea37a6b8 | 1304 | int retval; |
e16dad6b JO |
1305 | |
1306 | retval = -ENXIO; | |
1307 | down(&hyperv_mmio_lock); | |
35464483 | 1308 | |
ea37a6b8 JO |
1309 | /* |
1310 | * If overlaps with frame buffers are allowed, then first attempt to | |
1311 | * make the allocation from within the reserved region. Because it | |
1312 | * is already reserved, no shadow allocation is necessary. | |
1313 | */ | |
1314 | if (fb_overlap_ok && fb_mmio && !(min > fb_mmio->end) && | |
1315 | !(max < fb_mmio->start)) { | |
1316 | ||
1317 | range_min = fb_mmio->start; | |
1318 | range_max = fb_mmio->end; | |
1319 | start = (range_min + align - 1) & ~(align - 1); | |
1320 | for (; start + size - 1 <= range_max; start += align) { | |
1321 | *new = request_mem_region_exclusive(start, size, dev_n); | |
1322 | if (*new) { | |
1323 | retval = 0; | |
1324 | goto exit; | |
1325 | } | |
1326 | } | |
1327 | } | |
1328 | ||
35464483 JO |
1329 | for (iter = hyperv_mmio; iter; iter = iter->sibling) { |
1330 | if ((iter->start >= max) || (iter->end <= min)) | |
1331 | continue; | |
1332 | ||
1333 | range_min = iter->start; | |
1334 | range_max = iter->end; | |
ea37a6b8 JO |
1335 | start = (range_min + align - 1) & ~(align - 1); |
1336 | for (; start + size - 1 <= range_max; start += align) { | |
1337 | shadow = __request_region(iter, start, size, NULL, | |
1338 | IORESOURCE_BUSY); | |
1339 | if (!shadow) | |
1340 | continue; | |
1341 | ||
1342 | *new = request_mem_region_exclusive(start, size, dev_n); | |
1343 | if (*new) { | |
1344 | shadow->name = (char *)*new; | |
1345 | retval = 0; | |
1346 | goto exit; | |
35464483 JO |
1347 | } |
1348 | ||
ea37a6b8 | 1349 | __release_region(iter, start, size); |
35464483 JO |
1350 | } |
1351 | } | |
1352 | ||
e16dad6b JO |
1353 | exit: |
1354 | up(&hyperv_mmio_lock); | |
1355 | return retval; | |
35464483 JO |
1356 | } |
1357 | EXPORT_SYMBOL_GPL(vmbus_allocate_mmio); | |
1358 | ||
97fb77dc JO |
1359 | /** |
1360 | * vmbus_free_mmio() - Free a memory-mapped I/O range. | |
1361 | * @start: Base address of region to release. | |
1362 | * @size: Size of the range to be allocated | |
1363 | * | |
1364 | * This function releases anything requested by | |
1365 | * vmbus_mmio_allocate(). | |
1366 | */ | |
1367 | void vmbus_free_mmio(resource_size_t start, resource_size_t size) | |
1368 | { | |
be000f93 JO |
1369 | struct resource *iter; |
1370 | ||
1371 | down(&hyperv_mmio_lock); | |
1372 | for (iter = hyperv_mmio; iter; iter = iter->sibling) { | |
1373 | if ((iter->start >= start + size) || (iter->end <= start)) | |
1374 | continue; | |
1375 | ||
1376 | __release_region(iter, start, size); | |
1377 | } | |
97fb77dc | 1378 | release_mem_region(start, size); |
be000f93 | 1379 | up(&hyperv_mmio_lock); |
97fb77dc JO |
1380 | |
1381 | } | |
1382 | EXPORT_SYMBOL_GPL(vmbus_free_mmio); | |
1383 | ||
619848bd JO |
1384 | /** |
1385 | * vmbus_cpu_number_to_vp_number() - Map CPU to VP. | |
1386 | * @cpu_number: CPU number in Linux terms | |
1387 | * | |
1388 | * This function returns the mapping between the Linux processor | |
1389 | * number and the hypervisor's virtual processor number, useful | |
1390 | * in making hypercalls and such that talk about specific | |
1391 | * processors. | |
1392 | * | |
1393 | * Return: Virtual processor number in Hyper-V terms | |
1394 | */ | |
1395 | int vmbus_cpu_number_to_vp_number(int cpu_number) | |
1396 | { | |
1397 | return hv_context.vp_index[cpu_number]; | |
1398 | } | |
1399 | EXPORT_SYMBOL_GPL(vmbus_cpu_number_to_vp_number); | |
1400 | ||
b0069f43 S |
1401 | static int vmbus_acpi_add(struct acpi_device *device) |
1402 | { | |
1403 | acpi_status result; | |
90f34535 | 1404 | int ret_val = -ENODEV; |
7f163a6f | 1405 | struct acpi_device *ancestor; |
b0069f43 | 1406 | |
607c1a11 S |
1407 | hv_acpi_dev = device; |
1408 | ||
0a4425b6 | 1409 | result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, |
90f34535 | 1410 | vmbus_walk_resources, NULL); |
b0069f43 | 1411 | |
90f34535 S |
1412 | if (ACPI_FAILURE(result)) |
1413 | goto acpi_walk_err; | |
1414 | /* | |
7f163a6f JO |
1415 | * Some ancestor of the vmbus acpi device (Gen1 or Gen2 |
1416 | * firmware) is the VMOD that has the mmio ranges. Get that. | |
90f34535 | 1417 | */ |
7f163a6f JO |
1418 | for (ancestor = device->parent; ancestor; ancestor = ancestor->parent) { |
1419 | result = acpi_walk_resources(ancestor->handle, METHOD_NAME__CRS, | |
1420 | vmbus_walk_resources, NULL); | |
90f34535 S |
1421 | |
1422 | if (ACPI_FAILURE(result)) | |
7f163a6f | 1423 | continue; |
6d146aef JO |
1424 | if (hyperv_mmio) { |
1425 | vmbus_reserve_fb(); | |
7f163a6f | 1426 | break; |
6d146aef | 1427 | } |
b0069f43 | 1428 | } |
90f34535 S |
1429 | ret_val = 0; |
1430 | ||
1431 | acpi_walk_err: | |
b0069f43 | 1432 | complete(&probe_event); |
7f163a6f JO |
1433 | if (ret_val) |
1434 | vmbus_acpi_remove(device); | |
90f34535 | 1435 | return ret_val; |
b0069f43 S |
1436 | } |
1437 | ||
1438 | static const struct acpi_device_id vmbus_acpi_device_ids[] = { | |
1439 | {"VMBUS", 0}, | |
9d7b18d1 | 1440 | {"VMBus", 0}, |
b0069f43 S |
1441 | {"", 0}, |
1442 | }; | |
1443 | MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); | |
1444 | ||
1445 | static struct acpi_driver vmbus_acpi_driver = { | |
1446 | .name = "vmbus", | |
1447 | .ids = vmbus_acpi_device_ids, | |
1448 | .ops = { | |
1449 | .add = vmbus_acpi_add, | |
e4ecb41c | 1450 | .remove = vmbus_acpi_remove, |
b0069f43 S |
1451 | }, |
1452 | }; | |
1453 | ||
2517281d VK |
1454 | static void hv_kexec_handler(void) |
1455 | { | |
2517281d | 1456 | hv_synic_clockevents_cleanup(); |
75ff3a8a | 1457 | vmbus_initiate_unload(false); |
ccbf4254 VK |
1458 | vmbus_connection.conn_state = DISCONNECTED; |
1459 | /* Make sure conn_state is set as hv_synic_cleanup checks for it */ | |
1460 | mb(); | |
fdf5149c | 1461 | cpuhp_remove_state(hyperv_cpuhp_online); |
27a01f1e | 1462 | hyperv_cleanup(); |
2517281d VK |
1463 | }; |
1464 | ||
b4370df2 VK |
1465 | static void hv_crash_handler(struct pt_regs *regs) |
1466 | { | |
75ff3a8a | 1467 | vmbus_initiate_unload(true); |
b4370df2 VK |
1468 | /* |
1469 | * In crash handler we can't schedule synic cleanup for all CPUs, | |
1470 | * doing the cleanup for current CPU only. This should be sufficient | |
1471 | * for kdump. | |
1472 | */ | |
ccbf4254 | 1473 | vmbus_connection.conn_state = DISCONNECTED; |
fdf5149c | 1474 | hv_synic_cleanup(smp_processor_id()); |
27a01f1e | 1475 | hyperv_cleanup(); |
b4370df2 VK |
1476 | }; |
1477 | ||
607c1a11 | 1478 | static int __init hv_acpi_init(void) |
1168ac22 | 1479 | { |
2dda95f8 | 1480 | int ret, t; |
b0069f43 | 1481 | |
1f94ea81 | 1482 | if (x86_hyper != &x86_hyper_ms_hyperv) |
0592969e JW |
1483 | return -ENODEV; |
1484 | ||
b0069f43 S |
1485 | init_completion(&probe_event); |
1486 | ||
1487 | /* | |
efc26722 | 1488 | * Get ACPI resources first. |
b0069f43 | 1489 | */ |
0246604c S |
1490 | ret = acpi_bus_register_driver(&vmbus_acpi_driver); |
1491 | ||
b0069f43 S |
1492 | if (ret) |
1493 | return ret; | |
1494 | ||
2dda95f8 S |
1495 | t = wait_for_completion_timeout(&probe_event, 5*HZ); |
1496 | if (t == 0) { | |
1497 | ret = -ETIMEDOUT; | |
1498 | goto cleanup; | |
1499 | } | |
b0069f43 | 1500 | |
efc26722 | 1501 | ret = vmbus_bus_init(); |
91fd799e | 1502 | if (ret) |
2dda95f8 S |
1503 | goto cleanup; |
1504 | ||
2517281d | 1505 | hv_setup_kexec_handler(hv_kexec_handler); |
b4370df2 | 1506 | hv_setup_crash_handler(hv_crash_handler); |
2517281d | 1507 | |
2dda95f8 S |
1508 | return 0; |
1509 | ||
1510 | cleanup: | |
1511 | acpi_bus_unregister_driver(&vmbus_acpi_driver); | |
cf6a2eac | 1512 | hv_acpi_dev = NULL; |
91fd799e | 1513 | return ret; |
1168ac22 S |
1514 | } |
1515 | ||
93e5bd06 S |
1516 | static void __exit vmbus_exit(void) |
1517 | { | |
e72e7ac5 VK |
1518 | int cpu; |
1519 | ||
2517281d | 1520 | hv_remove_kexec_handler(); |
b4370df2 | 1521 | hv_remove_crash_handler(); |
09a19628 | 1522 | vmbus_connection.conn_state = DISCONNECTED; |
e086748c | 1523 | hv_synic_clockevents_cleanup(); |
2db84eff | 1524 | vmbus_disconnect(); |
76d388cd | 1525 | hv_remove_vmbus_irq(); |
d81274aa S |
1526 | for_each_online_cpu(cpu) |
1527 | tasklet_kill(hv_context.msg_dpc[cpu]); | |
93e5bd06 | 1528 | vmbus_free_channels(); |
cc2dd402 | 1529 | if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) { |
510f7aef | 1530 | unregister_die_notifier(&hyperv_die_block); |
096c605f VK |
1531 | atomic_notifier_chain_unregister(&panic_notifier_list, |
1532 | &hyperv_panic_block); | |
1533 | } | |
93e5bd06 | 1534 | bus_unregister(&hv_bus); |
1959a28e VK |
1535 | for_each_online_cpu(cpu) { |
1536 | tasklet_kill(hv_context.event_dpc[cpu]); | |
1959a28e | 1537 | } |
fdf5149c | 1538 | cpuhp_remove_state(hyperv_cpuhp_online); |
06210b42 | 1539 | hv_synic_free(); |
93e5bd06 S |
1540 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
1541 | } | |
1542 | ||
1168ac22 | 1543 | |
90c9960e | 1544 | MODULE_LICENSE("GPL"); |
3e7ee490 | 1545 | |
43d4e119 | 1546 | subsys_initcall(hv_acpi_init); |
93e5bd06 | 1547 | module_exit(vmbus_exit); |