Commit | Line | Data |
---|---|---|
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 | */ | |
a0086dc5 GKH |
22 | #include <linux/kernel.h> |
23 | #include <linux/mm.h> | |
b7c947f0 | 24 | #include <linux/vmalloc.h> |
4983b39a | 25 | #include "osd.h" |
645954c5 | 26 | #include "logging.h" |
3e7ee490 HJ |
27 | #include "VmbusPrivate.h" |
28 | ||
454f18a9 | 29 | /* The one and only */ |
af248e1f GKH |
30 | struct hv_context gHvContext = { |
31 | .SynICInitialized = false, | |
32 | .HypercallPage = NULL, | |
33 | .SignalEventParam = NULL, | |
34 | .SignalEventBuffer = NULL, | |
3e7ee490 HJ |
35 | }; |
36 | ||
0831ad04 GKH |
37 | /** |
38 | * HvQueryHypervisorPresence - Query the cpuid for presense of windows hypervisor | |
39 | */ | |
40 | static int HvQueryHypervisorPresence(void) | |
3e7ee490 | 41 | { |
0831ad04 GKH |
42 | unsigned int eax; |
43 | unsigned int ebx; | |
44 | unsigned int ecx; | |
45 | unsigned int edx; | |
46 | unsigned int op; | |
3e7ee490 | 47 | |
454f18a9 BP |
48 | eax = 0; |
49 | ebx = 0; | |
50 | ecx = 0; | |
51 | edx = 0; | |
0831ad04 | 52 | op = HvCpuIdFunctionVersionAndFeatures; |
f931a70c | 53 | cpuid(op, &eax, &ebx, &ecx, &edx); |
0831ad04 GKH |
54 | |
55 | return ecx & HV_PRESENT_BIT; | |
3e7ee490 HJ |
56 | } |
57 | ||
0831ad04 GKH |
58 | /** |
59 | * HvQueryHypervisorInfo - Get version info of the windows hypervisor | |
60 | */ | |
61 | static int HvQueryHypervisorInfo(void) | |
62 | { | |
63 | unsigned int eax; | |
64 | unsigned int ebx; | |
65 | unsigned int ecx; | |
66 | unsigned int edx; | |
67 | unsigned int maxLeaf; | |
68 | unsigned int op; | |
3e7ee490 | 69 | |
0831ad04 GKH |
70 | /* |
71 | * Its assumed that this is called after confirming that Viridian | |
72 | * is present. Query id and revision. | |
73 | */ | |
74 | eax = 0; | |
75 | ebx = 0; | |
76 | ecx = 0; | |
77 | edx = 0; | |
78 | op = HvCpuIdFunctionHvVendorAndMaxFunction; | |
79 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
3e7ee490 | 80 | |
0831ad04 GKH |
81 | DPRINT_INFO(VMBUS, "Vendor ID: %c%c%c%c%c%c%c%c%c%c%c%c", |
82 | (ebx & 0xFF), | |
83 | ((ebx >> 8) & 0xFF), | |
84 | ((ebx >> 16) & 0xFF), | |
85 | ((ebx >> 24) & 0xFF), | |
86 | (ecx & 0xFF), | |
87 | ((ecx >> 8) & 0xFF), | |
88 | ((ecx >> 16) & 0xFF), | |
89 | ((ecx >> 24) & 0xFF), | |
90 | (edx & 0xFF), | |
91 | ((edx >> 8) & 0xFF), | |
92 | ((edx >> 16) & 0xFF), | |
93 | ((edx >> 24) & 0xFF)); | |
94 | ||
95 | maxLeaf = eax; | |
96 | eax = 0; | |
97 | ebx = 0; | |
98 | ecx = 0; | |
99 | edx = 0; | |
100 | op = HvCpuIdFunctionHvInterface; | |
101 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
3e7ee490 | 102 | |
0831ad04 GKH |
103 | DPRINT_INFO(VMBUS, "Interface ID: %c%c%c%c", |
104 | (eax & 0xFF), | |
105 | ((eax >> 8) & 0xFF), | |
106 | ((eax >> 16) & 0xFF), | |
107 | ((eax >> 24) & 0xFF)); | |
108 | ||
109 | if (maxLeaf >= HvCpuIdFunctionMsHvVersion) { | |
110 | eax = 0; | |
111 | ebx = 0; | |
112 | ecx = 0; | |
113 | edx = 0; | |
114 | op = HvCpuIdFunctionMsHvVersion; | |
115 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
116 | DPRINT_INFO(VMBUS, "OS Build:%d-%d.%d-%d-%d.%d",\ | |
117 | eax, | |
118 | ebx >> 16, | |
119 | ebx & 0xFFFF, | |
120 | ecx, | |
121 | edx >> 24, | |
122 | edx & 0xFFFFFF); | |
123 | } | |
124 | return maxLeaf; | |
125 | } | |
3e7ee490 | 126 | |
0831ad04 GKH |
127 | /** |
128 | * HvDoHypercall - Invoke the specified hypercall | |
129 | */ | |
130 | static u64 HvDoHypercall(u64 Control, void *Input, void *Output) | |
3e7ee490 | 131 | { |
530cf207 | 132 | #ifdef CONFIG_X86_64 |
0831ad04 GKH |
133 | u64 hvStatus = 0; |
134 | u64 inputAddress = (Input) ? virt_to_phys(Input) : 0; | |
135 | u64 outputAddress = (Output) ? virt_to_phys(Output) : 0; | |
136 | volatile void *hypercallPage = gHvContext.HypercallPage; | |
3e7ee490 | 137 | |
0831ad04 GKH |
138 | DPRINT_DBG(VMBUS, "Hypercall <control %llx input phys %llx virt %p " |
139 | "output phys %llx virt %p hypercall %p>", | |
140 | Control, inputAddress, Input, | |
141 | outputAddress, Output, hypercallPage); | |
3e7ee490 | 142 | |
0831ad04 GKH |
143 | __asm__ __volatile__("mov %0, %%r8" : : "r" (outputAddress) : "r8"); |
144 | __asm__ __volatile__("call *%3" : "=a" (hvStatus) : | |
145 | "c" (Control), "d" (inputAddress), | |
146 | "m" (hypercallPage)); | |
3e7ee490 | 147 | |
0831ad04 | 148 | DPRINT_DBG(VMBUS, "Hypercall <return %llx>", hvStatus); |
3e7ee490 | 149 | |
0831ad04 | 150 | return hvStatus; |
3e7ee490 HJ |
151 | |
152 | #else | |
153 | ||
0831ad04 GKH |
154 | u32 controlHi = Control >> 32; |
155 | u32 controlLo = Control & 0xFFFFFFFF; | |
156 | u32 hvStatusHi = 1; | |
157 | u32 hvStatusLo = 1; | |
158 | u64 inputAddress = (Input) ? virt_to_phys(Input) : 0; | |
159 | u32 inputAddressHi = inputAddress >> 32; | |
160 | u32 inputAddressLo = inputAddress & 0xFFFFFFFF; | |
fa56d361 | 161 | u64 outputAddress = (Output) ? virt_to_phys(Output) : 0; |
0831ad04 GKH |
162 | u32 outputAddressHi = outputAddress >> 32; |
163 | u32 outputAddressLo = outputAddress & 0xFFFFFFFF; | |
164 | volatile void *hypercallPage = gHvContext.HypercallPage; | |
3e7ee490 | 165 | |
0831ad04 GKH |
166 | DPRINT_DBG(VMBUS, "Hypercall <control %llx input %p output %p>", |
167 | Control, Input, Output); | |
3e7ee490 | 168 | |
0831ad04 GKH |
169 | __asm__ __volatile__ ("call *%8" : "=d"(hvStatusHi), |
170 | "=a"(hvStatusLo) : "d" (controlHi), | |
171 | "a" (controlLo), "b" (inputAddressHi), | |
172 | "c" (inputAddressLo), "D"(outputAddressHi), | |
173 | "S"(outputAddressLo), "m" (hypercallPage)); | |
3e7ee490 | 174 | |
0831ad04 GKH |
175 | DPRINT_DBG(VMBUS, "Hypercall <return %llx>", |
176 | hvStatusLo | ((u64)hvStatusHi << 32)); | |
3e7ee490 | 177 | |
0831ad04 GKH |
178 | return hvStatusLo | ((u64)hvStatusHi << 32); |
179 | #endif /* !x86_64 */ | |
3e7ee490 HJ |
180 | } |
181 | ||
0831ad04 GKH |
182 | /** |
183 | * HvInit - Main initialization routine. | |
184 | * | |
185 | * This routine must be called before any other routines in here are called | |
186 | */ | |
187 | int HvInit(void) | |
3e7ee490 | 188 | { |
0831ad04 GKH |
189 | int ret = 0; |
190 | int maxLeaf; | |
f80b3d51 | 191 | union hv_x64_msr_hypercall_contents hypercallMsr; |
949cadaa | 192 | void *virtAddr = NULL; |
3e7ee490 HJ |
193 | |
194 | DPRINT_ENTER(VMBUS); | |
195 | ||
44f357f8 BP |
196 | memset(gHvContext.synICEventPage, 0, sizeof(void *) * MAX_NUM_CPUS); |
197 | memset(gHvContext.synICMessagePage, 0, sizeof(void *) * MAX_NUM_CPUS); | |
3e7ee490 | 198 | |
0831ad04 | 199 | if (!HvQueryHypervisorPresence()) { |
3e7ee490 HJ |
200 | DPRINT_ERR(VMBUS, "No Windows hypervisor detected!!"); |
201 | goto Cleanup; | |
202 | } | |
203 | ||
0831ad04 GKH |
204 | DPRINT_INFO(VMBUS, |
205 | "Windows hypervisor detected! Retrieving more info..."); | |
3e7ee490 | 206 | |
0831ad04 GKH |
207 | maxLeaf = HvQueryHypervisorInfo(); |
208 | /* HvQueryHypervisorFeatures(maxLeaf); */ | |
3e7ee490 | 209 | |
0831ad04 GKH |
210 | /* |
211 | * Determine if we are running on xenlinux (ie x2v shim) or native | |
212 | * linux | |
213 | */ | |
a51ed7d6 | 214 | rdmsrl(HV_X64_MSR_GUEST_OS_ID, gHvContext.GuestId); |
0831ad04 | 215 | if (gHvContext.GuestId == 0) { |
454f18a9 | 216 | /* Write our OS info */ |
a51ed7d6 | 217 | wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID); |
3e7ee490 HJ |
218 | gHvContext.GuestId = HV_LINUX_GUEST_ID; |
219 | } | |
220 | ||
454f18a9 | 221 | /* See if the hypercall page is already set */ |
a51ed7d6 | 222 | rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64); |
0831ad04 | 223 | if (gHvContext.GuestId == HV_LINUX_GUEST_ID) { |
454f18a9 | 224 | /* Allocate the hypercall page memory */ |
bfc30aae GKH |
225 | /* virtAddr = osd_PageAlloc(1); */ |
226 | virtAddr = osd_VirtualAllocExec(PAGE_SIZE); | |
3e7ee490 | 227 | |
0831ad04 GKH |
228 | if (!virtAddr) { |
229 | DPRINT_ERR(VMBUS, | |
230 | "unable to allocate hypercall page!!"); | |
3e7ee490 HJ |
231 | goto Cleanup; |
232 | } | |
233 | ||
234 | hypercallMsr.Enable = 1; | |
0831ad04 GKH |
235 | /* hypercallMsr.GuestPhysicalAddress = |
236 | * virt_to_phys(virtAddr) >> PAGE_SHIFT; */ | |
fa56d361 | 237 | hypercallMsr.GuestPhysicalAddress = vmalloc_to_pfn(virtAddr); |
a51ed7d6 | 238 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64); |
3e7ee490 | 239 | |
0831ad04 | 240 | /* Confirm that hypercall page did get setup. */ |
3e7ee490 | 241 | hypercallMsr.AsUINT64 = 0; |
a51ed7d6 | 242 | rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64); |
0831ad04 | 243 | if (!hypercallMsr.Enable) { |
3e7ee490 HJ |
244 | DPRINT_ERR(VMBUS, "unable to set hypercall page!!"); |
245 | goto Cleanup; | |
246 | } | |
247 | ||
248 | gHvContext.HypercallPage = virtAddr; | |
0831ad04 GKH |
249 | } else { |
250 | DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!", | |
251 | gHvContext.GuestId); | |
3e7ee490 HJ |
252 | goto Cleanup; |
253 | } | |
254 | ||
2701f686 GKH |
255 | DPRINT_INFO(VMBUS, "Hypercall page VA=%p, PA=0x%0llx", |
256 | gHvContext.HypercallPage, | |
257 | (u64)hypercallMsr.GuestPhysicalAddress << PAGE_SHIFT); | |
3e7ee490 | 258 | |
454f18a9 | 259 | /* Setup the global signal event param for the signal event hypercall */ |
0831ad04 GKH |
260 | gHvContext.SignalEventBuffer = |
261 | kmalloc(sizeof(struct hv_input_signal_event_buffer), | |
262 | GFP_KERNEL); | |
3e7ee490 | 263 | if (!gHvContext.SignalEventBuffer) |
3e7ee490 | 264 | goto Cleanup; |
3e7ee490 | 265 | |
0831ad04 GKH |
266 | gHvContext.SignalEventParam = |
267 | (struct hv_input_signal_event *) | |
268 | (ALIGN_UP((unsigned long)gHvContext.SignalEventBuffer, | |
269 | HV_HYPERCALL_PARAM_ALIGN)); | |
4d643114 | 270 | gHvContext.SignalEventParam->ConnectionId.Asu32 = 0; |
0831ad04 GKH |
271 | gHvContext.SignalEventParam->ConnectionId.u.Id = |
272 | VMBUS_EVENT_CONNECTION_ID; | |
3e7ee490 HJ |
273 | gHvContext.SignalEventParam->FlagNumber = 0; |
274 | gHvContext.SignalEventParam->RsvdZ = 0; | |
275 | ||
0831ad04 | 276 | /* DPRINT_DBG(VMBUS, "My id %llu", HvGetCurrentPartitionId()); */ |
3e7ee490 HJ |
277 | |
278 | DPRINT_EXIT(VMBUS); | |
279 | ||
0831ad04 | 280 | return ret; |
3e7ee490 HJ |
281 | |
282 | Cleanup: | |
0831ad04 GKH |
283 | if (virtAddr) { |
284 | if (hypercallMsr.Enable) { | |
3e7ee490 | 285 | hypercallMsr.AsUINT64 = 0; |
a51ed7d6 | 286 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64); |
3e7ee490 HJ |
287 | } |
288 | ||
b7c947f0 | 289 | vfree(virtAddr); |
3e7ee490 HJ |
290 | } |
291 | ret = -1; | |
292 | DPRINT_EXIT(VMBUS); | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
0831ad04 GKH |
297 | /** |
298 | * HvCleanup - Cleanup routine. | |
299 | * | |
300 | * This routine is called normally during driver unloading or exiting. | |
301 | */ | |
302 | void HvCleanup(void) | |
3e7ee490 | 303 | { |
f80b3d51 | 304 | union hv_x64_msr_hypercall_contents hypercallMsr; |
3e7ee490 HJ |
305 | |
306 | DPRINT_ENTER(VMBUS); | |
307 | ||
0831ad04 | 308 | if (gHvContext.SignalEventBuffer) { |
3e7ee490 HJ |
309 | gHvContext.SignalEventBuffer = NULL; |
310 | gHvContext.SignalEventParam = NULL; | |
0831ad04 | 311 | kfree(gHvContext.SignalEventBuffer); |
3e7ee490 HJ |
312 | } |
313 | ||
0831ad04 GKH |
314 | if (gHvContext.GuestId == HV_LINUX_GUEST_ID) { |
315 | if (gHvContext.HypercallPage) { | |
3e7ee490 | 316 | hypercallMsr.AsUINT64 = 0; |
a51ed7d6 | 317 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64); |
b7c947f0 | 318 | vfree(gHvContext.HypercallPage); |
3e7ee490 HJ |
319 | gHvContext.HypercallPage = NULL; |
320 | } | |
321 | } | |
322 | ||
323 | DPRINT_EXIT(VMBUS); | |
324 | ||
325 | } | |
326 | ||
0831ad04 GKH |
327 | /** |
328 | * HvPostMessage - Post a message using the hypervisor message IPC. | |
329 | * | |
330 | * This involves a hypercall. | |
331 | */ | |
034469e6 GKH |
332 | u16 HvPostMessage(union hv_connection_id connectionId, |
333 | enum hv_message_type messageType, | |
334 | void *payload, size_t payloadSize) | |
3e7ee490 HJ |
335 | { |
336 | struct alignedInput { | |
0831ad04 | 337 | u64 alignment8; |
cba4decd | 338 | struct hv_input_post_message msg; |
3e7ee490 HJ |
339 | }; |
340 | ||
cba4decd | 341 | struct hv_input_post_message *alignedMsg; |
034469e6 | 342 | u16 status; |
c4b0bc94 | 343 | unsigned long addr; |
3e7ee490 HJ |
344 | |
345 | if (payloadSize > HV_MESSAGE_PAYLOAD_BYTE_COUNT) | |
3e7ee490 | 346 | return -1; |
3e7ee490 | 347 | |
0a72f3cf | 348 | addr = (unsigned long)kmalloc(sizeof(struct alignedInput), GFP_ATOMIC); |
3e7ee490 | 349 | if (!addr) |
3e7ee490 | 350 | return -1; |
3e7ee490 | 351 | |
0831ad04 GKH |
352 | alignedMsg = (struct hv_input_post_message *) |
353 | (ALIGN_UP(addr, HV_HYPERCALL_PARAM_ALIGN)); | |
3e7ee490 HJ |
354 | |
355 | alignedMsg->ConnectionId = connectionId; | |
356 | alignedMsg->MessageType = messageType; | |
357 | alignedMsg->PayloadSize = payloadSize; | |
0831ad04 | 358 | memcpy((void *)alignedMsg->Payload, payload, payloadSize); |
3e7ee490 | 359 | |
949cadaa | 360 | status = HvDoHypercall(HvCallPostMessage, alignedMsg, NULL) & 0xFFFF; |
3e7ee490 | 361 | |
0831ad04 | 362 | kfree((void *)addr); |
3e7ee490 HJ |
363 | |
364 | return status; | |
365 | } | |
366 | ||
367 | ||
0831ad04 GKH |
368 | /** |
369 | * HvSignalEvent - Signal an event on the specified connection using the hypervisor event IPC. | |
370 | * | |
371 | * This involves a hypercall. | |
372 | */ | |
034469e6 | 373 | u16 HvSignalEvent(void) |
3e7ee490 | 374 | { |
034469e6 | 375 | u16 status; |
3e7ee490 | 376 | |
0831ad04 GKH |
377 | status = HvDoHypercall(HvCallSignalEvent, gHvContext.SignalEventParam, |
378 | NULL) & 0xFFFF; | |
3e7ee490 HJ |
379 | return status; |
380 | } | |
381 | ||
0831ad04 GKH |
382 | /** |
383 | * HvSynicInit - Initialize the Synthethic Interrupt Controller. | |
384 | * | |
385 | * If it is already initialized by another entity (ie x2v shim), we need to | |
386 | * retrieve the initialized message and event pages. Otherwise, we create and | |
387 | * initialize the message and event pages. | |
388 | */ | |
7692fd4d | 389 | void HvSynicInit(void *irqarg) |
3e7ee490 | 390 | { |
0831ad04 | 391 | u64 version; |
eacb1b4d GKH |
392 | union hv_synic_simp simp; |
393 | union hv_synic_siefp siefp; | |
394 | union hv_synic_sint sharedSint; | |
395 | union hv_synic_scontrol sctrl; | |
0831ad04 | 396 | u64 guestID; |
7692fd4d GKH |
397 | u32 irqVector = *((u32 *)(irqarg)); |
398 | int cpu = smp_processor_id(); | |
3e7ee490 HJ |
399 | |
400 | DPRINT_ENTER(VMBUS); | |
401 | ||
0831ad04 | 402 | if (!gHvContext.HypercallPage) { |
3e7ee490 | 403 | DPRINT_EXIT(VMBUS); |
7692fd4d | 404 | return; |
3e7ee490 HJ |
405 | } |
406 | ||
454f18a9 | 407 | /* Check the version */ |
a51ed7d6 | 408 | rdmsrl(HV_X64_MSR_SVERSION, version); |
3e7ee490 HJ |
409 | |
410 | DPRINT_INFO(VMBUS, "SynIC version: %llx", version); | |
411 | ||
454f18a9 | 412 | /* TODO: Handle SMP */ |
0831ad04 GKH |
413 | if (gHvContext.GuestId == HV_XENLINUX_GUEST_ID) { |
414 | DPRINT_INFO(VMBUS, "Skipping SIMP and SIEFP setup since " | |
415 | "it is already set."); | |
3e7ee490 | 416 | |
a51ed7d6 GKH |
417 | rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64); |
418 | rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64); | |
3e7ee490 | 419 | |
0831ad04 GKH |
420 | DPRINT_DBG(VMBUS, "Simp: %llx, Sifep: %llx", |
421 | simp.AsUINT64, siefp.AsUINT64); | |
3e7ee490 | 422 | |
0831ad04 GKH |
423 | /* |
424 | * Determine if we are running on xenlinux (ie x2v shim) or | |
425 | * native linux | |
426 | */ | |
a51ed7d6 | 427 | rdmsrl(HV_X64_MSR_GUEST_OS_ID, guestID); |
0831ad04 | 428 | if (guestID == HV_LINUX_GUEST_ID) { |
7692fd4d | 429 | gHvContext.synICMessagePage[cpu] = |
0831ad04 | 430 | phys_to_virt(simp.BaseSimpGpa << PAGE_SHIFT); |
7692fd4d | 431 | gHvContext.synICEventPage[cpu] = |
0831ad04 GKH |
432 | phys_to_virt(siefp.BaseSiefpGpa << PAGE_SHIFT); |
433 | } else { | |
3e7ee490 HJ |
434 | DPRINT_ERR(VMBUS, "unknown guest id!!"); |
435 | goto Cleanup; | |
436 | } | |
0831ad04 | 437 | DPRINT_DBG(VMBUS, "MAPPED: Simp: %p, Sifep: %p", |
7692fd4d GKH |
438 | gHvContext.synICMessagePage[cpu], |
439 | gHvContext.synICEventPage[cpu]); | |
0831ad04 | 440 | } else { |
7692fd4d GKH |
441 | gHvContext.synICMessagePage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC); |
442 | if (gHvContext.synICMessagePage[cpu] == NULL) { | |
0831ad04 GKH |
443 | DPRINT_ERR(VMBUS, |
444 | "unable to allocate SYNIC message page!!"); | |
3e7ee490 HJ |
445 | goto Cleanup; |
446 | } | |
447 | ||
7692fd4d GKH |
448 | gHvContext.synICEventPage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC); |
449 | if (gHvContext.synICEventPage[cpu] == NULL) { | |
0831ad04 GKH |
450 | DPRINT_ERR(VMBUS, |
451 | "unable to allocate SYNIC event page!!"); | |
3e7ee490 HJ |
452 | goto Cleanup; |
453 | } | |
454 | ||
454f18a9 | 455 | /* Setup the Synic's message page */ |
a51ed7d6 | 456 | rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64); |
3e7ee490 | 457 | simp.SimpEnabled = 1; |
7692fd4d | 458 | simp.BaseSimpGpa = virt_to_phys(gHvContext.synICMessagePage[cpu]) |
0831ad04 | 459 | >> PAGE_SHIFT; |
3e7ee490 | 460 | |
0831ad04 GKH |
461 | DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx", |
462 | simp.AsUINT64); | |
3e7ee490 | 463 | |
a51ed7d6 | 464 | wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64); |
3e7ee490 | 465 | |
454f18a9 | 466 | /* Setup the Synic's event page */ |
a51ed7d6 | 467 | rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64); |
3e7ee490 | 468 | siefp.SiefpEnabled = 1; |
7692fd4d | 469 | siefp.BaseSiefpGpa = virt_to_phys(gHvContext.synICEventPage[cpu]) |
0831ad04 | 470 | >> PAGE_SHIFT; |
3e7ee490 | 471 | |
0831ad04 GKH |
472 | DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx", |
473 | siefp.AsUINT64); | |
3e7ee490 | 474 | |
a51ed7d6 | 475 | wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64); |
3e7ee490 | 476 | } |
0831ad04 GKH |
477 | |
478 | /* Setup the interception SINT. */ | |
a51ed7d6 | 479 | /* wrmsrl((HV_X64_MSR_SINT0 + HV_SYNIC_INTERCEPTION_SINT_INDEX), */ |
0831ad04 | 480 | /* interceptionSint.AsUINT64); */ |
454f18a9 | 481 | |
0831ad04 | 482 | /* Setup the shared SINT. */ |
a51ed7d6 | 483 | rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64); |
3e7ee490 HJ |
484 | |
485 | sharedSint.AsUINT64 = 0; | |
454f18a9 BP |
486 | sharedSint.Vector = irqVector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ |
487 | sharedSint.Masked = false; | |
488 | sharedSint.AutoEoi = true; | |
3e7ee490 | 489 | |
0831ad04 GKH |
490 | DPRINT_DBG(VMBUS, "HV_X64_MSR_SINT1 msr set to: %llx", |
491 | sharedSint.AsUINT64); | |
3e7ee490 | 492 | |
a51ed7d6 | 493 | wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64); |
3e7ee490 | 494 | |
454f18a9 | 495 | /* Enable the global synic bit */ |
a51ed7d6 | 496 | rdmsrl(HV_X64_MSR_SCONTROL, sctrl.AsUINT64); |
3e7ee490 HJ |
497 | sctrl.Enable = 1; |
498 | ||
a51ed7d6 | 499 | wrmsrl(HV_X64_MSR_SCONTROL, sctrl.AsUINT64); |
3e7ee490 | 500 | |
0e727613 | 501 | gHvContext.SynICInitialized = true; |
3e7ee490 HJ |
502 | |
503 | DPRINT_EXIT(VMBUS); | |
504 | ||
7692fd4d | 505 | return; |
3e7ee490 HJ |
506 | |
507 | Cleanup: | |
0831ad04 | 508 | if (gHvContext.GuestId == HV_LINUX_GUEST_ID) { |
7692fd4d GKH |
509 | if (gHvContext.synICEventPage[cpu]) |
510 | osd_PageFree(gHvContext.synICEventPage[cpu], 1); | |
3e7ee490 | 511 | |
7692fd4d GKH |
512 | if (gHvContext.synICMessagePage[cpu]) |
513 | osd_PageFree(gHvContext.synICMessagePage[cpu], 1); | |
3e7ee490 HJ |
514 | } |
515 | ||
516 | DPRINT_EXIT(VMBUS); | |
7692fd4d | 517 | return; |
3e7ee490 HJ |
518 | } |
519 | ||
0831ad04 GKH |
520 | /** |
521 | * HvSynicCleanup - Cleanup routine for HvSynicInit(). | |
522 | */ | |
7692fd4d | 523 | void HvSynicCleanup(void *arg) |
3e7ee490 | 524 | { |
eacb1b4d GKH |
525 | union hv_synic_sint sharedSint; |
526 | union hv_synic_simp simp; | |
527 | union hv_synic_siefp siefp; | |
7692fd4d | 528 | int cpu = smp_processor_id(); |
3e7ee490 HJ |
529 | |
530 | DPRINT_ENTER(VMBUS); | |
531 | ||
0831ad04 | 532 | if (!gHvContext.SynICInitialized) { |
3e7ee490 HJ |
533 | DPRINT_EXIT(VMBUS); |
534 | return; | |
535 | } | |
536 | ||
a51ed7d6 | 537 | rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64); |
3e7ee490 HJ |
538 | |
539 | sharedSint.Masked = 1; | |
540 | ||
7692fd4d | 541 | /* Need to correctly cleanup in the case of SMP!!! */ |
454f18a9 | 542 | /* Disable the interrupt */ |
a51ed7d6 | 543 | wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64); |
3e7ee490 | 544 | |
454f18a9 BP |
545 | /* |
546 | * Disable and free the resources only if we are running as | |
547 | * native linux since in xenlinux, we are sharing the | |
548 | * resources with the x2v shim | |
549 | */ | |
0831ad04 | 550 | if (gHvContext.GuestId == HV_LINUX_GUEST_ID) { |
a51ed7d6 | 551 | rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64); |
3e7ee490 HJ |
552 | simp.SimpEnabled = 0; |
553 | simp.BaseSimpGpa = 0; | |
554 | ||
a51ed7d6 | 555 | wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64); |
3e7ee490 | 556 | |
a51ed7d6 | 557 | rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64); |
3e7ee490 HJ |
558 | siefp.SiefpEnabled = 0; |
559 | siefp.BaseSiefpGpa = 0; | |
560 | ||
a51ed7d6 | 561 | wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64); |
3e7ee490 | 562 | |
7692fd4d GKH |
563 | osd_PageFree(gHvContext.synICMessagePage[cpu], 1); |
564 | osd_PageFree(gHvContext.synICEventPage[cpu], 1); | |
3e7ee490 HJ |
565 | } |
566 | ||
567 | DPRINT_EXIT(VMBUS); | |
568 | } |