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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 | |
bbf45ba5 HB |
34 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
35 | { | |
36 | return gfn; | |
37 | } | |
38 | ||
39 | int kvm_cpu_has_interrupt(struct kvm_vcpu *v) | |
40 | { | |
45c5eb67 | 41 | return !!(v->arch.pending_exceptions); |
bbf45ba5 HB |
42 | } |
43 | ||
78646121 GN |
44 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) |
45 | { | |
46 | /* do real check here */ | |
47 | return 1; | |
48 | } | |
49 | ||
bbf45ba5 HB |
50 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
51 | { | |
45c5eb67 | 52 | return !(v->arch.msr & MSR_WE); |
bbf45ba5 HB |
53 | } |
54 | ||
55 | ||
56 | int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) | |
57 | { | |
58 | enum emulation_result er; | |
59 | int r; | |
60 | ||
61 | er = kvmppc_emulate_instruction(run, vcpu); | |
62 | switch (er) { | |
63 | case EMULATE_DONE: | |
64 | /* Future optimization: only reload non-volatiles if they were | |
65 | * actually modified. */ | |
66 | r = RESUME_GUEST_NV; | |
67 | break; | |
68 | case EMULATE_DO_MMIO: | |
69 | run->exit_reason = KVM_EXIT_MMIO; | |
70 | /* We must reload nonvolatiles because "update" load/store | |
71 | * instructions modify register state. */ | |
72 | /* Future optimization: only reload non-volatiles if they were | |
73 | * actually modified. */ | |
74 | r = RESUME_HOST_NV; | |
75 | break; | |
76 | case EMULATE_FAIL: | |
77 | /* XXX Deliver Program interrupt to guest. */ | |
78 | printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, | |
79 | vcpu->arch.last_inst); | |
80 | r = RESUME_HOST; | |
81 | break; | |
82 | default: | |
83 | BUG(); | |
84 | } | |
85 | ||
86 | return r; | |
87 | } | |
88 | ||
89 | void kvm_arch_hardware_enable(void *garbage) | |
90 | { | |
91 | } | |
92 | ||
93 | void kvm_arch_hardware_disable(void *garbage) | |
94 | { | |
95 | } | |
96 | ||
97 | int kvm_arch_hardware_setup(void) | |
98 | { | |
99 | return 0; | |
100 | } | |
101 | ||
102 | void kvm_arch_hardware_unsetup(void) | |
103 | { | |
104 | } | |
105 | ||
106 | void kvm_arch_check_processor_compat(void *rtn) | |
107 | { | |
9dd921cf | 108 | *(int *)rtn = kvmppc_core_check_processor_compat(); |
bbf45ba5 HB |
109 | } |
110 | ||
111 | struct kvm *kvm_arch_create_vm(void) | |
112 | { | |
113 | struct kvm *kvm; | |
114 | ||
115 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
116 | if (!kvm) | |
117 | return ERR_PTR(-ENOMEM); | |
118 | ||
119 | return kvm; | |
120 | } | |
121 | ||
122 | static void kvmppc_free_vcpus(struct kvm *kvm) | |
123 | { | |
124 | unsigned int i; | |
125 | ||
126 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
127 | if (kvm->vcpus[i]) { | |
128 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
129 | kvm->vcpus[i] = NULL; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
ad8ba2cd SY |
134 | void kvm_arch_sync_events(struct kvm *kvm) |
135 | { | |
136 | } | |
137 | ||
bbf45ba5 HB |
138 | void kvm_arch_destroy_vm(struct kvm *kvm) |
139 | { | |
140 | kvmppc_free_vcpus(kvm); | |
141 | kvm_free_physmem(kvm); | |
142 | kfree(kvm); | |
143 | } | |
144 | ||
145 | int kvm_dev_ioctl_check_extension(long ext) | |
146 | { | |
147 | int r; | |
148 | ||
149 | switch (ext) { | |
588968b6 LV |
150 | case KVM_CAP_COALESCED_MMIO: |
151 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
152 | break; | |
bbf45ba5 HB |
153 | default: |
154 | r = 0; | |
155 | break; | |
156 | } | |
157 | return r; | |
158 | ||
159 | } | |
160 | ||
161 | long kvm_arch_dev_ioctl(struct file *filp, | |
162 | unsigned int ioctl, unsigned long arg) | |
163 | { | |
164 | return -EINVAL; | |
165 | } | |
166 | ||
167 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
168 | struct kvm_userspace_memory_region *mem, | |
169 | struct kvm_memory_slot old, | |
170 | int user_alloc) | |
171 | { | |
172 | return 0; | |
173 | } | |
174 | ||
34d4cb8f MT |
175 | void kvm_arch_flush_shadow(struct kvm *kvm) |
176 | { | |
177 | } | |
178 | ||
bbf45ba5 HB |
179 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
180 | { | |
73e75b41 HB |
181 | struct kvm_vcpu *vcpu; |
182 | vcpu = kvmppc_core_vcpu_create(kvm, id); | |
183 | kvmppc_create_vcpu_debugfs(vcpu, id); | |
184 | return vcpu; | |
bbf45ba5 HB |
185 | } |
186 | ||
187 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
188 | { | |
73e75b41 | 189 | kvmppc_remove_vcpu_debugfs(vcpu); |
db93f574 | 190 | kvmppc_core_vcpu_free(vcpu); |
bbf45ba5 HB |
191 | } |
192 | ||
193 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
194 | { | |
195 | kvm_arch_vcpu_free(vcpu); | |
196 | } | |
197 | ||
198 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
199 | { | |
9dd921cf | 200 | return kvmppc_core_pending_dec(vcpu); |
bbf45ba5 HB |
201 | } |
202 | ||
203 | static void kvmppc_decrementer_func(unsigned long data) | |
204 | { | |
205 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; | |
206 | ||
9dd921cf | 207 | kvmppc_core_queue_dec(vcpu); |
45c5eb67 HB |
208 | |
209 | if (waitqueue_active(&vcpu->wq)) { | |
210 | wake_up_interruptible(&vcpu->wq); | |
211 | vcpu->stat.halt_wakeup++; | |
212 | } | |
bbf45ba5 HB |
213 | } |
214 | ||
215 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
216 | { | |
217 | setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func, | |
218 | (unsigned long)vcpu); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
224 | { | |
ecc0981f | 225 | kvmppc_mmu_destroy(vcpu); |
bbf45ba5 HB |
226 | } |
227 | ||
228 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
229 | { | |
9dd921cf | 230 | kvmppc_core_vcpu_load(vcpu, cpu); |
bbf45ba5 HB |
231 | } |
232 | ||
233 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
234 | { | |
9dd921cf | 235 | kvmppc_core_vcpu_put(vcpu); |
bbf45ba5 HB |
236 | } |
237 | ||
d0bfb940 | 238 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
f5d0906b | 239 | struct kvm_guest_debug *dbg) |
bbf45ba5 | 240 | { |
f5d0906b | 241 | return -EINVAL; |
bbf45ba5 HB |
242 | } |
243 | ||
244 | static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, | |
245 | struct kvm_run *run) | |
246 | { | |
5cf8ca22 | 247 | ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; |
bbf45ba5 HB |
248 | *gpr = run->dcr.data; |
249 | } | |
250 | ||
251 | static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, | |
252 | struct kvm_run *run) | |
253 | { | |
5cf8ca22 | 254 | ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; |
bbf45ba5 HB |
255 | |
256 | if (run->mmio.len > sizeof(*gpr)) { | |
257 | printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); | |
258 | return; | |
259 | } | |
260 | ||
261 | if (vcpu->arch.mmio_is_bigendian) { | |
262 | switch (run->mmio.len) { | |
263 | case 4: *gpr = *(u32 *)run->mmio.data; break; | |
264 | case 2: *gpr = *(u16 *)run->mmio.data; break; | |
265 | case 1: *gpr = *(u8 *)run->mmio.data; break; | |
266 | } | |
267 | } else { | |
268 | /* Convert BE data from userland back to LE. */ | |
269 | switch (run->mmio.len) { | |
270 | case 4: *gpr = ld_le32((u32 *)run->mmio.data); break; | |
271 | case 2: *gpr = ld_le16((u16 *)run->mmio.data); break; | |
272 | case 1: *gpr = *(u8 *)run->mmio.data; break; | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
277 | int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
278 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
279 | { | |
280 | if (bytes > sizeof(run->mmio.data)) { | |
281 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
282 | run->mmio.len); | |
283 | } | |
284 | ||
285 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
286 | run->mmio.len = bytes; | |
287 | run->mmio.is_write = 0; | |
288 | ||
289 | vcpu->arch.io_gpr = rt; | |
290 | vcpu->arch.mmio_is_bigendian = is_bigendian; | |
291 | vcpu->mmio_needed = 1; | |
292 | vcpu->mmio_is_write = 0; | |
293 | ||
294 | return EMULATE_DO_MMIO; | |
295 | } | |
296 | ||
297 | int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
298 | u32 val, unsigned int bytes, int is_bigendian) | |
299 | { | |
300 | void *data = run->mmio.data; | |
301 | ||
302 | if (bytes > sizeof(run->mmio.data)) { | |
303 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
304 | run->mmio.len); | |
305 | } | |
306 | ||
307 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
308 | run->mmio.len = bytes; | |
309 | run->mmio.is_write = 1; | |
310 | vcpu->mmio_needed = 1; | |
311 | vcpu->mmio_is_write = 1; | |
312 | ||
313 | /* Store the value at the lowest bytes in 'data'. */ | |
314 | if (is_bigendian) { | |
315 | switch (bytes) { | |
316 | case 4: *(u32 *)data = val; break; | |
317 | case 2: *(u16 *)data = val; break; | |
318 | case 1: *(u8 *)data = val; break; | |
319 | } | |
320 | } else { | |
321 | /* Store LE value into 'data'. */ | |
322 | switch (bytes) { | |
323 | case 4: st_le32(data, val); break; | |
324 | case 2: st_le16(data, val); break; | |
325 | case 1: *(u8 *)data = val; break; | |
326 | } | |
327 | } | |
328 | ||
329 | return EMULATE_DO_MMIO; | |
330 | } | |
331 | ||
332 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
333 | { | |
334 | int r; | |
335 | sigset_t sigsaved; | |
336 | ||
45c5eb67 HB |
337 | vcpu_load(vcpu); |
338 | ||
bbf45ba5 HB |
339 | if (vcpu->sigset_active) |
340 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
341 | ||
342 | if (vcpu->mmio_needed) { | |
343 | if (!vcpu->mmio_is_write) | |
344 | kvmppc_complete_mmio_load(vcpu, run); | |
345 | vcpu->mmio_needed = 0; | |
346 | } else if (vcpu->arch.dcr_needed) { | |
347 | if (!vcpu->arch.dcr_is_write) | |
348 | kvmppc_complete_dcr_load(vcpu, run); | |
349 | vcpu->arch.dcr_needed = 0; | |
350 | } | |
351 | ||
9dd921cf | 352 | kvmppc_core_deliver_interrupts(vcpu); |
bbf45ba5 HB |
353 | |
354 | local_irq_disable(); | |
355 | kvm_guest_enter(); | |
356 | r = __kvmppc_vcpu_run(run, vcpu); | |
357 | kvm_guest_exit(); | |
358 | local_irq_enable(); | |
359 | ||
360 | if (vcpu->sigset_active) | |
361 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
362 | ||
45c5eb67 HB |
363 | vcpu_put(vcpu); |
364 | ||
bbf45ba5 HB |
365 | return r; |
366 | } | |
367 | ||
368 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) | |
369 | { | |
9dd921cf | 370 | kvmppc_core_queue_external(vcpu, irq); |
45c5eb67 HB |
371 | |
372 | if (waitqueue_active(&vcpu->wq)) { | |
373 | wake_up_interruptible(&vcpu->wq); | |
374 | vcpu->stat.halt_wakeup++; | |
375 | } | |
376 | ||
bbf45ba5 HB |
377 | return 0; |
378 | } | |
379 | ||
380 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
381 | struct kvm_mp_state *mp_state) | |
382 | { | |
383 | return -EINVAL; | |
384 | } | |
385 | ||
386 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
387 | struct kvm_mp_state *mp_state) | |
388 | { | |
389 | return -EINVAL; | |
390 | } | |
391 | ||
392 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
393 | unsigned int ioctl, unsigned long arg) | |
394 | { | |
395 | struct kvm_vcpu *vcpu = filp->private_data; | |
396 | void __user *argp = (void __user *)arg; | |
397 | long r; | |
398 | ||
399 | switch (ioctl) { | |
400 | case KVM_INTERRUPT: { | |
401 | struct kvm_interrupt irq; | |
402 | r = -EFAULT; | |
403 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
404 | goto out; | |
405 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
406 | break; | |
407 | } | |
408 | default: | |
409 | r = -EINVAL; | |
410 | } | |
411 | ||
412 | out: | |
413 | return r; | |
414 | } | |
415 | ||
416 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
417 | { | |
418 | return -ENOTSUPP; | |
419 | } | |
420 | ||
421 | long kvm_arch_vm_ioctl(struct file *filp, | |
422 | unsigned int ioctl, unsigned long arg) | |
423 | { | |
424 | long r; | |
425 | ||
426 | switch (ioctl) { | |
427 | default: | |
428 | r = -EINVAL; | |
429 | } | |
430 | ||
431 | return r; | |
432 | } | |
433 | ||
434 | int kvm_arch_init(void *opaque) | |
435 | { | |
436 | return 0; | |
437 | } | |
438 | ||
439 | void kvm_arch_exit(void) | |
440 | { | |
441 | } |