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bbf45ba5 HB |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License, version 2, as | |
4 | * published by the Free Software Foundation. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, | |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | * | |
11 | * You should have received a copy of the GNU General Public License | |
12 | * along with this program; if not, write to the Free Software | |
13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
14 | * | |
15 | * Copyright IBM Corp. 2007 | |
16 | * | |
17 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> | |
18 | * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> | |
19 | */ | |
20 | ||
21 | #include <linux/errno.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/fs.h> | |
27 | #include <asm/cputable.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <asm/kvm_ppc.h> | |
83aae4a8 | 30 | #include <asm/tlbflush.h> |
73e75b41 | 31 | #include "timing.h" |
fad7b9b5 | 32 | #include "../mm/mmu_decl.h" |
bbf45ba5 | 33 | |
46f43c6e MT |
34 | #define CREATE_TRACE_POINTS |
35 | #include "trace.h" | |
36 | ||
bbf45ba5 HB |
37 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
38 | { | |
39 | return gfn; | |
40 | } | |
41 | ||
bbf45ba5 HB |
42 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
43 | { | |
a1b37100 | 44 | return !(v->arch.msr & MSR_WE) || !!(v->arch.pending_exceptions); |
bbf45ba5 HB |
45 | } |
46 | ||
47 | ||
48 | int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) | |
49 | { | |
50 | enum emulation_result er; | |
51 | int r; | |
52 | ||
53 | er = kvmppc_emulate_instruction(run, vcpu); | |
54 | switch (er) { | |
55 | case EMULATE_DONE: | |
56 | /* Future optimization: only reload non-volatiles if they were | |
57 | * actually modified. */ | |
58 | r = RESUME_GUEST_NV; | |
59 | break; | |
60 | case EMULATE_DO_MMIO: | |
61 | run->exit_reason = KVM_EXIT_MMIO; | |
62 | /* We must reload nonvolatiles because "update" load/store | |
63 | * instructions modify register state. */ | |
64 | /* Future optimization: only reload non-volatiles if they were | |
65 | * actually modified. */ | |
66 | r = RESUME_HOST_NV; | |
67 | break; | |
68 | case EMULATE_FAIL: | |
69 | /* XXX Deliver Program interrupt to guest. */ | |
70 | printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, | |
71 | vcpu->arch.last_inst); | |
72 | r = RESUME_HOST; | |
73 | break; | |
74 | default: | |
75 | BUG(); | |
76 | } | |
77 | ||
78 | return r; | |
79 | } | |
80 | ||
81 | void kvm_arch_hardware_enable(void *garbage) | |
82 | { | |
83 | } | |
84 | ||
85 | void kvm_arch_hardware_disable(void *garbage) | |
86 | { | |
87 | } | |
88 | ||
89 | int kvm_arch_hardware_setup(void) | |
90 | { | |
91 | return 0; | |
92 | } | |
93 | ||
94 | void kvm_arch_hardware_unsetup(void) | |
95 | { | |
96 | } | |
97 | ||
98 | void kvm_arch_check_processor_compat(void *rtn) | |
99 | { | |
9dd921cf | 100 | *(int *)rtn = kvmppc_core_check_processor_compat(); |
bbf45ba5 HB |
101 | } |
102 | ||
103 | struct kvm *kvm_arch_create_vm(void) | |
104 | { | |
105 | struct kvm *kvm; | |
106 | ||
107 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
108 | if (!kvm) | |
109 | return ERR_PTR(-ENOMEM); | |
110 | ||
111 | return kvm; | |
112 | } | |
113 | ||
114 | static void kvmppc_free_vcpus(struct kvm *kvm) | |
115 | { | |
116 | unsigned int i; | |
988a2cae | 117 | struct kvm_vcpu *vcpu; |
bbf45ba5 | 118 | |
988a2cae GN |
119 | kvm_for_each_vcpu(i, vcpu, kvm) |
120 | kvm_arch_vcpu_free(vcpu); | |
121 | ||
122 | mutex_lock(&kvm->lock); | |
123 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
124 | kvm->vcpus[i] = NULL; | |
125 | ||
126 | atomic_set(&kvm->online_vcpus, 0); | |
127 | mutex_unlock(&kvm->lock); | |
bbf45ba5 HB |
128 | } |
129 | ||
ad8ba2cd SY |
130 | void kvm_arch_sync_events(struct kvm *kvm) |
131 | { | |
132 | } | |
133 | ||
bbf45ba5 HB |
134 | void kvm_arch_destroy_vm(struct kvm *kvm) |
135 | { | |
136 | kvmppc_free_vcpus(kvm); | |
137 | kvm_free_physmem(kvm); | |
138 | kfree(kvm); | |
139 | } | |
140 | ||
141 | int kvm_dev_ioctl_check_extension(long ext) | |
142 | { | |
143 | int r; | |
144 | ||
145 | switch (ext) { | |
588968b6 LV |
146 | case KVM_CAP_COALESCED_MMIO: |
147 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
148 | break; | |
bbf45ba5 HB |
149 | default: |
150 | r = 0; | |
151 | break; | |
152 | } | |
153 | return r; | |
154 | ||
155 | } | |
156 | ||
157 | long kvm_arch_dev_ioctl(struct file *filp, | |
158 | unsigned int ioctl, unsigned long arg) | |
159 | { | |
160 | return -EINVAL; | |
161 | } | |
162 | ||
163 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
164 | struct kvm_userspace_memory_region *mem, | |
165 | struct kvm_memory_slot old, | |
166 | int user_alloc) | |
167 | { | |
168 | return 0; | |
169 | } | |
170 | ||
34d4cb8f MT |
171 | void kvm_arch_flush_shadow(struct kvm *kvm) |
172 | { | |
173 | } | |
174 | ||
bbf45ba5 HB |
175 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
176 | { | |
73e75b41 HB |
177 | struct kvm_vcpu *vcpu; |
178 | vcpu = kvmppc_core_vcpu_create(kvm, id); | |
179 | kvmppc_create_vcpu_debugfs(vcpu, id); | |
180 | return vcpu; | |
bbf45ba5 HB |
181 | } |
182 | ||
183 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
184 | { | |
73e75b41 | 185 | kvmppc_remove_vcpu_debugfs(vcpu); |
db93f574 | 186 | kvmppc_core_vcpu_free(vcpu); |
bbf45ba5 HB |
187 | } |
188 | ||
189 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
190 | { | |
191 | kvm_arch_vcpu_free(vcpu); | |
192 | } | |
193 | ||
194 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
195 | { | |
9dd921cf | 196 | return kvmppc_core_pending_dec(vcpu); |
bbf45ba5 HB |
197 | } |
198 | ||
199 | static void kvmppc_decrementer_func(unsigned long data) | |
200 | { | |
201 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; | |
202 | ||
9dd921cf | 203 | kvmppc_core_queue_dec(vcpu); |
45c5eb67 HB |
204 | |
205 | if (waitqueue_active(&vcpu->wq)) { | |
206 | wake_up_interruptible(&vcpu->wq); | |
207 | vcpu->stat.halt_wakeup++; | |
208 | } | |
bbf45ba5 HB |
209 | } |
210 | ||
211 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
212 | { | |
213 | setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func, | |
214 | (unsigned long)vcpu); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
220 | { | |
ecc0981f | 221 | kvmppc_mmu_destroy(vcpu); |
bbf45ba5 HB |
222 | } |
223 | ||
224 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
225 | { | |
9dd921cf | 226 | kvmppc_core_vcpu_load(vcpu, cpu); |
bbf45ba5 HB |
227 | } |
228 | ||
229 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
230 | { | |
9dd921cf | 231 | kvmppc_core_vcpu_put(vcpu); |
bbf45ba5 HB |
232 | } |
233 | ||
d0bfb940 | 234 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
f5d0906b | 235 | struct kvm_guest_debug *dbg) |
bbf45ba5 | 236 | { |
f5d0906b | 237 | return -EINVAL; |
bbf45ba5 HB |
238 | } |
239 | ||
240 | static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, | |
241 | struct kvm_run *run) | |
242 | { | |
5cf8ca22 | 243 | ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; |
bbf45ba5 HB |
244 | *gpr = run->dcr.data; |
245 | } | |
246 | ||
247 | static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, | |
248 | struct kvm_run *run) | |
249 | { | |
5cf8ca22 | 250 | ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; |
bbf45ba5 HB |
251 | |
252 | if (run->mmio.len > sizeof(*gpr)) { | |
253 | printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); | |
254 | return; | |
255 | } | |
256 | ||
257 | if (vcpu->arch.mmio_is_bigendian) { | |
258 | switch (run->mmio.len) { | |
259 | case 4: *gpr = *(u32 *)run->mmio.data; break; | |
260 | case 2: *gpr = *(u16 *)run->mmio.data; break; | |
261 | case 1: *gpr = *(u8 *)run->mmio.data; break; | |
262 | } | |
263 | } else { | |
264 | /* Convert BE data from userland back to LE. */ | |
265 | switch (run->mmio.len) { | |
266 | case 4: *gpr = ld_le32((u32 *)run->mmio.data); break; | |
267 | case 2: *gpr = ld_le16((u16 *)run->mmio.data); break; | |
268 | case 1: *gpr = *(u8 *)run->mmio.data; break; | |
269 | } | |
270 | } | |
271 | } | |
272 | ||
273 | int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
274 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
275 | { | |
276 | if (bytes > sizeof(run->mmio.data)) { | |
277 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
278 | run->mmio.len); | |
279 | } | |
280 | ||
281 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
282 | run->mmio.len = bytes; | |
283 | run->mmio.is_write = 0; | |
284 | ||
285 | vcpu->arch.io_gpr = rt; | |
286 | vcpu->arch.mmio_is_bigendian = is_bigendian; | |
287 | vcpu->mmio_needed = 1; | |
288 | vcpu->mmio_is_write = 0; | |
289 | ||
290 | return EMULATE_DO_MMIO; | |
291 | } | |
292 | ||
293 | int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
294 | u32 val, unsigned int bytes, int is_bigendian) | |
295 | { | |
296 | void *data = run->mmio.data; | |
297 | ||
298 | if (bytes > sizeof(run->mmio.data)) { | |
299 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
300 | run->mmio.len); | |
301 | } | |
302 | ||
303 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
304 | run->mmio.len = bytes; | |
305 | run->mmio.is_write = 1; | |
306 | vcpu->mmio_needed = 1; | |
307 | vcpu->mmio_is_write = 1; | |
308 | ||
309 | /* Store the value at the lowest bytes in 'data'. */ | |
310 | if (is_bigendian) { | |
311 | switch (bytes) { | |
312 | case 4: *(u32 *)data = val; break; | |
313 | case 2: *(u16 *)data = val; break; | |
314 | case 1: *(u8 *)data = val; break; | |
315 | } | |
316 | } else { | |
317 | /* Store LE value into 'data'. */ | |
318 | switch (bytes) { | |
319 | case 4: st_le32(data, val); break; | |
320 | case 2: st_le16(data, val); break; | |
321 | case 1: *(u8 *)data = val; break; | |
322 | } | |
323 | } | |
324 | ||
325 | return EMULATE_DO_MMIO; | |
326 | } | |
327 | ||
328 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
329 | { | |
330 | int r; | |
331 | sigset_t sigsaved; | |
332 | ||
45c5eb67 HB |
333 | vcpu_load(vcpu); |
334 | ||
bbf45ba5 HB |
335 | if (vcpu->sigset_active) |
336 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
337 | ||
338 | if (vcpu->mmio_needed) { | |
339 | if (!vcpu->mmio_is_write) | |
340 | kvmppc_complete_mmio_load(vcpu, run); | |
341 | vcpu->mmio_needed = 0; | |
342 | } else if (vcpu->arch.dcr_needed) { | |
343 | if (!vcpu->arch.dcr_is_write) | |
344 | kvmppc_complete_dcr_load(vcpu, run); | |
345 | vcpu->arch.dcr_needed = 0; | |
346 | } | |
347 | ||
9dd921cf | 348 | kvmppc_core_deliver_interrupts(vcpu); |
bbf45ba5 HB |
349 | |
350 | local_irq_disable(); | |
351 | kvm_guest_enter(); | |
352 | r = __kvmppc_vcpu_run(run, vcpu); | |
353 | kvm_guest_exit(); | |
354 | local_irq_enable(); | |
355 | ||
356 | if (vcpu->sigset_active) | |
357 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
358 | ||
45c5eb67 HB |
359 | vcpu_put(vcpu); |
360 | ||
bbf45ba5 HB |
361 | return r; |
362 | } | |
363 | ||
364 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) | |
365 | { | |
9dd921cf | 366 | kvmppc_core_queue_external(vcpu, irq); |
45c5eb67 HB |
367 | |
368 | if (waitqueue_active(&vcpu->wq)) { | |
369 | wake_up_interruptible(&vcpu->wq); | |
370 | vcpu->stat.halt_wakeup++; | |
371 | } | |
372 | ||
bbf45ba5 HB |
373 | return 0; |
374 | } | |
375 | ||
376 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
377 | struct kvm_mp_state *mp_state) | |
378 | { | |
379 | return -EINVAL; | |
380 | } | |
381 | ||
382 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
383 | struct kvm_mp_state *mp_state) | |
384 | { | |
385 | return -EINVAL; | |
386 | } | |
387 | ||
388 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
389 | unsigned int ioctl, unsigned long arg) | |
390 | { | |
391 | struct kvm_vcpu *vcpu = filp->private_data; | |
392 | void __user *argp = (void __user *)arg; | |
393 | long r; | |
394 | ||
395 | switch (ioctl) { | |
396 | case KVM_INTERRUPT: { | |
397 | struct kvm_interrupt irq; | |
398 | r = -EFAULT; | |
399 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
400 | goto out; | |
401 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
402 | break; | |
403 | } | |
404 | default: | |
405 | r = -EINVAL; | |
406 | } | |
407 | ||
408 | out: | |
409 | return r; | |
410 | } | |
411 | ||
bbf45ba5 HB |
412 | long kvm_arch_vm_ioctl(struct file *filp, |
413 | unsigned int ioctl, unsigned long arg) | |
414 | { | |
415 | long r; | |
416 | ||
417 | switch (ioctl) { | |
418 | default: | |
419 | r = -EINVAL; | |
420 | } | |
421 | ||
422 | return r; | |
423 | } | |
424 | ||
425 | int kvm_arch_init(void *opaque) | |
426 | { | |
427 | return 0; | |
428 | } | |
429 | ||
430 | void kvm_arch_exit(void) | |
431 | { | |
432 | } |