Commit | Line | Data |
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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> | |
20 | * | |
21 | */ | |
0a46618d HJ |
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
23 | ||
a0086dc5 GKH |
24 | #include <linux/kernel.h> |
25 | #include <linux/mm.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
b7c947f0 | 27 | #include <linux/vmalloc.h> |
46a97191 | 28 | #include <linux/hyperv.h> |
83ba0c4f | 29 | #include <linux/version.h> |
db11f12a | 30 | #include <linux/interrupt.h> |
4061ed9e | 31 | #include <linux/clockchips.h> |
407dd164 | 32 | #include <asm/hyperv.h> |
4061ed9e | 33 | #include <asm/mshyperv.h> |
0f2a6619 | 34 | #include "hyperv_vmbus.h" |
3e7ee490 | 35 | |
454f18a9 | 36 | /* The one and only */ |
6a0aaa18 HZ |
37 | struct hv_context hv_context = { |
38 | .synic_initialized = false, | |
39 | .hypercall_page = NULL, | |
3e7ee490 HJ |
40 | }; |
41 | ||
4061ed9e S |
42 | #define HV_TIMER_FREQUENCY (10 * 1000 * 1000) /* 100ns period */ |
43 | #define HV_MAX_MAX_DELTA_TICKS 0xffffffff | |
44 | #define HV_MIN_DELTA_TICKS 1 | |
45 | ||
3e189519 | 46 | /* |
d44890c8 | 47 | * query_hypervisor_info - Get version info of the windows hypervisor |
0831ad04 | 48 | */ |
5fbebb2d S |
49 | unsigned int host_info_eax; |
50 | unsigned int host_info_ebx; | |
51 | unsigned int host_info_ecx; | |
52 | unsigned int host_info_edx; | |
53 | ||
d44890c8 | 54 | static int query_hypervisor_info(void) |
0831ad04 GKH |
55 | { |
56 | unsigned int eax; | |
57 | unsigned int ebx; | |
58 | unsigned int ecx; | |
59 | unsigned int edx; | |
b8dfb264 | 60 | unsigned int max_leaf; |
0831ad04 | 61 | unsigned int op; |
3e7ee490 | 62 | |
0831ad04 GKH |
63 | /* |
64 | * Its assumed that this is called after confirming that Viridian | |
65 | * is present. Query id and revision. | |
66 | */ | |
67 | eax = 0; | |
68 | ebx = 0; | |
69 | ecx = 0; | |
70 | edx = 0; | |
f6feebe0 | 71 | op = HVCPUID_VENDOR_MAXFUNCTION; |
0831ad04 | 72 | cpuid(op, &eax, &ebx, &ecx, &edx); |
3e7ee490 | 73 | |
b8dfb264 | 74 | max_leaf = eax; |
0831ad04 | 75 | |
b8dfb264 | 76 | if (max_leaf >= HVCPUID_VERSION) { |
0831ad04 GKH |
77 | eax = 0; |
78 | ebx = 0; | |
79 | ecx = 0; | |
80 | edx = 0; | |
f6feebe0 | 81 | op = HVCPUID_VERSION; |
0831ad04 | 82 | cpuid(op, &eax, &ebx, &ecx, &edx); |
5fbebb2d S |
83 | host_info_eax = eax; |
84 | host_info_ebx = ebx; | |
85 | host_info_ecx = ecx; | |
86 | host_info_edx = edx; | |
0831ad04 | 87 | } |
b8dfb264 | 88 | return max_leaf; |
0831ad04 | 89 | } |
3e7ee490 | 90 | |
3e189519 | 91 | /* |
d44890c8 | 92 | * do_hypercall- Invoke the specified hypercall |
0831ad04 | 93 | */ |
d44890c8 | 94 | static u64 do_hypercall(u64 control, void *input, void *output) |
3e7ee490 | 95 | { |
530cf207 | 96 | #ifdef CONFIG_X86_64 |
b8dfb264 HZ |
97 | u64 hv_status = 0; |
98 | u64 input_address = (input) ? virt_to_phys(input) : 0; | |
99 | u64 output_address = (output) ? virt_to_phys(output) : 0; | |
dec317fd | 100 | void *hypercall_page = hv_context.hypercall_page; |
3e7ee490 | 101 | |
b8dfb264 HZ |
102 | __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); |
103 | __asm__ __volatile__("call *%3" : "=a" (hv_status) : | |
104 | "c" (control), "d" (input_address), | |
105 | "m" (hypercall_page)); | |
3e7ee490 | 106 | |
b8dfb264 | 107 | return hv_status; |
3e7ee490 HJ |
108 | |
109 | #else | |
110 | ||
b8dfb264 HZ |
111 | u32 control_hi = control >> 32; |
112 | u32 control_lo = control & 0xFFFFFFFF; | |
113 | u32 hv_status_hi = 1; | |
114 | u32 hv_status_lo = 1; | |
115 | u64 input_address = (input) ? virt_to_phys(input) : 0; | |
116 | u32 input_address_hi = input_address >> 32; | |
117 | u32 input_address_lo = input_address & 0xFFFFFFFF; | |
118 | u64 output_address = (output) ? virt_to_phys(output) : 0; | |
119 | u32 output_address_hi = output_address >> 32; | |
120 | u32 output_address_lo = output_address & 0xFFFFFFFF; | |
dec317fd | 121 | void *hypercall_page = hv_context.hypercall_page; |
3e7ee490 | 122 | |
b8dfb264 HZ |
123 | __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), |
124 | "=a"(hv_status_lo) : "d" (control_hi), | |
125 | "a" (control_lo), "b" (input_address_hi), | |
126 | "c" (input_address_lo), "D"(output_address_hi), | |
127 | "S"(output_address_lo), "m" (hypercall_page)); | |
3e7ee490 | 128 | |
b8dfb264 | 129 | return hv_status_lo | ((u64)hv_status_hi << 32); |
0831ad04 | 130 | #endif /* !x86_64 */ |
3e7ee490 HJ |
131 | } |
132 | ||
3e189519 | 133 | /* |
d44890c8 | 134 | * hv_init - Main initialization routine. |
0831ad04 GKH |
135 | * |
136 | * This routine must be called before any other routines in here are called | |
137 | */ | |
d44890c8 | 138 | int hv_init(void) |
3e7ee490 | 139 | { |
b8dfb264 HZ |
140 | int max_leaf; |
141 | union hv_x64_msr_hypercall_contents hypercall_msr; | |
142 | void *virtaddr = NULL; | |
3e7ee490 | 143 | |
14c1bf8a | 144 | memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS); |
6a0aaa18 | 145 | memset(hv_context.synic_message_page, 0, |
14c1bf8a | 146 | sizeof(void *) * NR_CPUS); |
b29ef354 S |
147 | memset(hv_context.post_msg_page, 0, |
148 | sizeof(void *) * NR_CPUS); | |
917ea427 S |
149 | memset(hv_context.vp_index, 0, |
150 | sizeof(int) * NR_CPUS); | |
db11f12a S |
151 | memset(hv_context.event_dpc, 0, |
152 | sizeof(void *) * NR_CPUS); | |
4061ed9e S |
153 | memset(hv_context.clk_evt, 0, |
154 | sizeof(void *) * NR_CPUS); | |
3e7ee490 | 155 | |
d44890c8 | 156 | max_leaf = query_hypervisor_info(); |
3e7ee490 | 157 | |
83ba0c4f S |
158 | /* |
159 | * Write our OS ID. | |
160 | */ | |
161 | hv_context.guestid = generate_guest_id(0, LINUX_VERSION_CODE, 0); | |
162 | wrmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); | |
a73e6b7c | 163 | |
454f18a9 | 164 | /* See if the hypercall page is already set */ |
b8dfb264 | 165 | rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |
3e7ee490 | 166 | |
df3493e0 | 167 | virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); |
3e7ee490 | 168 | |
98e08702 | 169 | if (!virtaddr) |
44939d37 | 170 | goto cleanup; |
3e7ee490 | 171 | |
b8dfb264 | 172 | hypercall_msr.enable = 1; |
a73e6b7c | 173 | |
b8dfb264 HZ |
174 | hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); |
175 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); | |
a73e6b7c HJ |
176 | |
177 | /* Confirm that hypercall page did get setup. */ | |
b8dfb264 HZ |
178 | hypercall_msr.as_uint64 = 0; |
179 | rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); | |
a73e6b7c | 180 | |
98e08702 | 181 | if (!hypercall_msr.enable) |
44939d37 | 182 | goto cleanup; |
3e7ee490 | 183 | |
b8dfb264 | 184 | hv_context.hypercall_page = virtaddr; |
a73e6b7c | 185 | |
5433e003 | 186 | return 0; |
3e7ee490 | 187 | |
44939d37 | 188 | cleanup: |
b8dfb264 HZ |
189 | if (virtaddr) { |
190 | if (hypercall_msr.enable) { | |
191 | hypercall_msr.as_uint64 = 0; | |
192 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); | |
3e7ee490 HJ |
193 | } |
194 | ||
b8dfb264 | 195 | vfree(virtaddr); |
3e7ee490 | 196 | } |
5433e003 S |
197 | |
198 | return -ENOTSUPP; | |
3e7ee490 HJ |
199 | } |
200 | ||
3e189519 | 201 | /* |
d44890c8 | 202 | * hv_cleanup - Cleanup routine. |
0831ad04 GKH |
203 | * |
204 | * This routine is called normally during driver unloading or exiting. | |
205 | */ | |
d44890c8 | 206 | void hv_cleanup(void) |
3e7ee490 | 207 | { |
b8dfb264 | 208 | union hv_x64_msr_hypercall_contents hypercall_msr; |
3e7ee490 | 209 | |
93e5bd06 S |
210 | /* Reset our OS id */ |
211 | wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0); | |
212 | ||
6a0aaa18 | 213 | if (hv_context.hypercall_page) { |
b8dfb264 HZ |
214 | hypercall_msr.as_uint64 = 0; |
215 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); | |
6a0aaa18 HZ |
216 | vfree(hv_context.hypercall_page); |
217 | hv_context.hypercall_page = NULL; | |
3e7ee490 | 218 | } |
3e7ee490 HJ |
219 | } |
220 | ||
3e189519 | 221 | /* |
d44890c8 | 222 | * hv_post_message - Post a message using the hypervisor message IPC. |
0831ad04 GKH |
223 | * |
224 | * This involves a hypercall. | |
225 | */ | |
415f0a02 | 226 | int hv_post_message(union hv_connection_id connection_id, |
b8dfb264 HZ |
227 | enum hv_message_type message_type, |
228 | void *payload, size_t payload_size) | |
3e7ee490 | 229 | { |
3e7ee490 | 230 | |
b8dfb264 | 231 | struct hv_input_post_message *aligned_msg; |
034469e6 | 232 | u16 status; |
3e7ee490 | 233 | |
b8dfb264 | 234 | if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) |
39594abc | 235 | return -EMSGSIZE; |
3e7ee490 | 236 | |
b8dfb264 | 237 | aligned_msg = (struct hv_input_post_message *) |
b29ef354 | 238 | hv_context.post_msg_page[get_cpu()]; |
3e7ee490 | 239 | |
b8dfb264 | 240 | aligned_msg->connectionid = connection_id; |
b29ef354 | 241 | aligned_msg->reserved = 0; |
b8dfb264 HZ |
242 | aligned_msg->message_type = message_type; |
243 | aligned_msg->payload_size = payload_size; | |
244 | memcpy((void *)aligned_msg->payload, payload, payload_size); | |
3e7ee490 | 245 | |
d44890c8 HZ |
246 | status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) |
247 | & 0xFFFF; | |
3e7ee490 | 248 | |
b29ef354 | 249 | put_cpu(); |
3e7ee490 HJ |
250 | return status; |
251 | } | |
252 | ||
253 | ||
3e189519 | 254 | /* |
d44890c8 HZ |
255 | * hv_signal_event - |
256 | * Signal an event on the specified connection using the hypervisor event IPC. | |
0831ad04 GKH |
257 | * |
258 | * This involves a hypercall. | |
259 | */ | |
1f42248d | 260 | u16 hv_signal_event(void *con_id) |
3e7ee490 | 261 | { |
034469e6 | 262 | u16 status; |
3e7ee490 | 263 | |
1f42248d S |
264 | status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF); |
265 | ||
3e7ee490 HJ |
266 | return status; |
267 | } | |
268 | ||
4061ed9e S |
269 | static int hv_ce_set_next_event(unsigned long delta, |
270 | struct clock_event_device *evt) | |
271 | { | |
272 | cycle_t current_tick; | |
273 | ||
274 | WARN_ON(evt->mode != CLOCK_EVT_MODE_ONESHOT); | |
275 | ||
276 | rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick); | |
277 | current_tick += delta; | |
278 | wrmsrl(HV_X64_MSR_STIMER0_COUNT, current_tick); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static void hv_ce_setmode(enum clock_event_mode mode, | |
283 | struct clock_event_device *evt) | |
284 | { | |
285 | union hv_timer_config timer_cfg; | |
286 | ||
287 | switch (mode) { | |
288 | case CLOCK_EVT_MODE_PERIODIC: | |
289 | /* unsupported */ | |
290 | break; | |
291 | ||
292 | case CLOCK_EVT_MODE_ONESHOT: | |
293 | timer_cfg.enable = 1; | |
294 | timer_cfg.auto_enable = 1; | |
295 | timer_cfg.sintx = VMBUS_MESSAGE_SINT; | |
296 | wrmsrl(HV_X64_MSR_STIMER0_CONFIG, timer_cfg.as_uint64); | |
297 | break; | |
298 | ||
299 | case CLOCK_EVT_MODE_UNUSED: | |
300 | case CLOCK_EVT_MODE_SHUTDOWN: | |
301 | wrmsrl(HV_X64_MSR_STIMER0_COUNT, 0); | |
302 | wrmsrl(HV_X64_MSR_STIMER0_CONFIG, 0); | |
303 | break; | |
304 | case CLOCK_EVT_MODE_RESUME: | |
305 | break; | |
306 | } | |
307 | } | |
308 | ||
309 | static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu) | |
310 | { | |
311 | dev->name = "Hyper-V clockevent"; | |
312 | dev->features = CLOCK_EVT_FEAT_ONESHOT; | |
313 | dev->cpumask = cpumask_of(cpu); | |
314 | dev->rating = 1000; | |
315 | dev->owner = THIS_MODULE; | |
316 | ||
317 | dev->set_mode = hv_ce_setmode; | |
318 | dev->set_next_event = hv_ce_set_next_event; | |
319 | } | |
320 | ||
2608fb65 JW |
321 | |
322 | int hv_synic_alloc(void) | |
323 | { | |
324 | size_t size = sizeof(struct tasklet_struct); | |
4061ed9e | 325 | size_t ced_size = sizeof(struct clock_event_device); |
2608fb65 JW |
326 | int cpu; |
327 | ||
328 | for_each_online_cpu(cpu) { | |
329 | hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC); | |
330 | if (hv_context.event_dpc[cpu] == NULL) { | |
331 | pr_err("Unable to allocate event dpc\n"); | |
332 | goto err; | |
333 | } | |
334 | tasklet_init(hv_context.event_dpc[cpu], vmbus_on_event, cpu); | |
335 | ||
4061ed9e S |
336 | hv_context.clk_evt[cpu] = kzalloc(ced_size, GFP_ATOMIC); |
337 | if (hv_context.clk_evt[cpu] == NULL) { | |
338 | pr_err("Unable to allocate clock event device\n"); | |
339 | goto err; | |
340 | } | |
341 | hv_init_clockevent_device(hv_context.clk_evt[cpu], cpu); | |
342 | ||
2608fb65 JW |
343 | hv_context.synic_message_page[cpu] = |
344 | (void *)get_zeroed_page(GFP_ATOMIC); | |
345 | ||
346 | if (hv_context.synic_message_page[cpu] == NULL) { | |
347 | pr_err("Unable to allocate SYNIC message page\n"); | |
348 | goto err; | |
349 | } | |
350 | ||
351 | hv_context.synic_event_page[cpu] = | |
352 | (void *)get_zeroed_page(GFP_ATOMIC); | |
353 | ||
354 | if (hv_context.synic_event_page[cpu] == NULL) { | |
355 | pr_err("Unable to allocate SYNIC event page\n"); | |
356 | goto err; | |
357 | } | |
b29ef354 S |
358 | |
359 | hv_context.post_msg_page[cpu] = | |
360 | (void *)get_zeroed_page(GFP_ATOMIC); | |
361 | ||
362 | if (hv_context.post_msg_page[cpu] == NULL) { | |
363 | pr_err("Unable to allocate post msg page\n"); | |
364 | goto err; | |
365 | } | |
2608fb65 JW |
366 | } |
367 | ||
368 | return 0; | |
369 | err: | |
370 | return -ENOMEM; | |
371 | } | |
372 | ||
8712954d | 373 | static void hv_synic_free_cpu(int cpu) |
2608fb65 JW |
374 | { |
375 | kfree(hv_context.event_dpc[cpu]); | |
4061ed9e | 376 | kfree(hv_context.clk_evt[cpu]); |
fdf91dae | 377 | if (hv_context.synic_event_page[cpu]) |
2608fb65 JW |
378 | free_page((unsigned long)hv_context.synic_event_page[cpu]); |
379 | if (hv_context.synic_message_page[cpu]) | |
380 | free_page((unsigned long)hv_context.synic_message_page[cpu]); | |
b29ef354 S |
381 | if (hv_context.post_msg_page[cpu]) |
382 | free_page((unsigned long)hv_context.post_msg_page[cpu]); | |
2608fb65 JW |
383 | } |
384 | ||
385 | void hv_synic_free(void) | |
386 | { | |
387 | int cpu; | |
388 | ||
389 | for_each_online_cpu(cpu) | |
390 | hv_synic_free_cpu(cpu); | |
391 | } | |
392 | ||
3e189519 | 393 | /* |
d44890c8 | 394 | * hv_synic_init - Initialize the Synthethic Interrupt Controller. |
0831ad04 GKH |
395 | * |
396 | * If it is already initialized by another entity (ie x2v shim), we need to | |
397 | * retrieve the initialized message and event pages. Otherwise, we create and | |
398 | * initialize the message and event pages. | |
399 | */ | |
302a3c0f | 400 | void hv_synic_init(void *arg) |
3e7ee490 | 401 | { |
0831ad04 | 402 | u64 version; |
eacb1b4d GKH |
403 | union hv_synic_simp simp; |
404 | union hv_synic_siefp siefp; | |
b8dfb264 | 405 | union hv_synic_sint shared_sint; |
eacb1b4d | 406 | union hv_synic_scontrol sctrl; |
917ea427 | 407 | u64 vp_index; |
a73e6b7c | 408 | |
7692fd4d | 409 | int cpu = smp_processor_id(); |
3e7ee490 | 410 | |
6a0aaa18 | 411 | if (!hv_context.hypercall_page) |
7692fd4d | 412 | return; |
3e7ee490 | 413 | |
454f18a9 | 414 | /* Check the version */ |
a51ed7d6 | 415 | rdmsrl(HV_X64_MSR_SVERSION, version); |
3e7ee490 | 416 | |
a73e6b7c | 417 | /* Setup the Synic's message page */ |
f6feebe0 HZ |
418 | rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
419 | simp.simp_enabled = 1; | |
6a0aaa18 | 420 | simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) |
a73e6b7c | 421 | >> PAGE_SHIFT; |
3e7ee490 | 422 | |
f6feebe0 | 423 | wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
3e7ee490 | 424 | |
a73e6b7c | 425 | /* Setup the Synic's event page */ |
f6feebe0 HZ |
426 | rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
427 | siefp.siefp_enabled = 1; | |
6a0aaa18 | 428 | siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) |
a73e6b7c HJ |
429 | >> PAGE_SHIFT; |
430 | ||
f6feebe0 | 431 | wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
0831ad04 | 432 | |
0831ad04 | 433 | /* Setup the shared SINT. */ |
b8dfb264 | 434 | rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
3e7ee490 | 435 | |
b8dfb264 | 436 | shared_sint.as_uint64 = 0; |
302a3c0f | 437 | shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR; |
b8dfb264 | 438 | shared_sint.masked = false; |
b0209501 | 439 | shared_sint.auto_eoi = true; |
3e7ee490 | 440 | |
b8dfb264 | 441 | wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
3e7ee490 | 442 | |
454f18a9 | 443 | /* Enable the global synic bit */ |
f6feebe0 HZ |
444 | rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); |
445 | sctrl.enable = 1; | |
3e7ee490 | 446 | |
f6feebe0 | 447 | wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); |
3e7ee490 | 448 | |
6a0aaa18 | 449 | hv_context.synic_initialized = true; |
917ea427 S |
450 | |
451 | /* | |
452 | * Setup the mapping between Hyper-V's notion | |
453 | * of cpuid and Linux' notion of cpuid. | |
454 | * This array will be indexed using Linux cpuid. | |
455 | */ | |
456 | rdmsrl(HV_X64_MSR_VP_INDEX, vp_index); | |
457 | hv_context.vp_index[cpu] = (u32)vp_index; | |
3a28fa35 S |
458 | |
459 | INIT_LIST_HEAD(&hv_context.percpu_list[cpu]); | |
4061ed9e S |
460 | |
461 | /* | |
462 | * Register the per-cpu clockevent source. | |
463 | */ | |
464 | if (ms_hyperv.features & HV_X64_MSR_SYNTIMER_AVAILABLE) | |
465 | clockevents_config_and_register(hv_context.clk_evt[cpu], | |
466 | HV_TIMER_FREQUENCY, | |
467 | HV_MIN_DELTA_TICKS, | |
468 | HV_MAX_MAX_DELTA_TICKS); | |
7692fd4d | 469 | return; |
3e7ee490 HJ |
470 | } |
471 | ||
3e189519 | 472 | /* |
d44890c8 | 473 | * hv_synic_cleanup - Cleanup routine for hv_synic_init(). |
0831ad04 | 474 | */ |
d44890c8 | 475 | void hv_synic_cleanup(void *arg) |
3e7ee490 | 476 | { |
b8dfb264 | 477 | union hv_synic_sint shared_sint; |
eacb1b4d GKH |
478 | union hv_synic_simp simp; |
479 | union hv_synic_siefp siefp; | |
e72e7ac5 | 480 | union hv_synic_scontrol sctrl; |
7692fd4d | 481 | int cpu = smp_processor_id(); |
3e7ee490 | 482 | |
6a0aaa18 | 483 | if (!hv_context.synic_initialized) |
3e7ee490 | 484 | return; |
3e7ee490 | 485 | |
b8dfb264 | 486 | rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
3e7ee490 | 487 | |
b8dfb264 | 488 | shared_sint.masked = 1; |
3e7ee490 | 489 | |
7692fd4d | 490 | /* Need to correctly cleanup in the case of SMP!!! */ |
454f18a9 | 491 | /* Disable the interrupt */ |
b8dfb264 | 492 | wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
3e7ee490 | 493 | |
f6feebe0 HZ |
494 | rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
495 | simp.simp_enabled = 0; | |
496 | simp.base_simp_gpa = 0; | |
3e7ee490 | 497 | |
f6feebe0 | 498 | wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
3e7ee490 | 499 | |
f6feebe0 HZ |
500 | rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
501 | siefp.siefp_enabled = 0; | |
502 | siefp.base_siefp_gpa = 0; | |
3e7ee490 | 503 | |
f6feebe0 | 504 | wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
3e7ee490 | 505 | |
e72e7ac5 VK |
506 | /* Disable the global synic bit */ |
507 | rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); | |
508 | sctrl.enable = 0; | |
509 | wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); | |
510 | ||
511 | hv_synic_free_cpu(cpu); | |
3e7ee490 | 512 | } |