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.
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.
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.
15 * Copyright IBM Corp. 2007
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
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/hrtimer.h>
28 #include <linux/slab.h>
29 #include <asm/cputable.h>
30 #include <asm/uaccess.h>
31 #include <asm/kvm_ppc.h>
32 #include <asm/tlbflush.h>
34 #include "../mm/mmu_decl.h"
36 #define CREATE_TRACE_POINTS
39 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
44 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*v
)
46 return !(v
->arch
.msr
& MSR_WE
) || !!(v
->arch
.pending_exceptions
);
50 int kvmppc_emulate_mmio(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
)
52 enum emulation_result er
;
55 er
= kvmppc_emulate_instruction(run
, vcpu
);
58 /* Future optimization: only reload non-volatiles if they were
59 * actually modified. */
63 run
->exit_reason
= KVM_EXIT_MMIO
;
64 /* We must reload nonvolatiles because "update" load/store
65 * instructions modify register state. */
66 /* Future optimization: only reload non-volatiles if they were
67 * actually modified. */
71 /* XXX Deliver Program interrupt to guest. */
72 printk(KERN_EMERG
"%s: emulation failed (%08x)\n", __func__
,
73 kvmppc_get_last_inst(vcpu
));
83 int kvm_arch_hardware_enable(void *garbage
)
88 void kvm_arch_hardware_disable(void *garbage
)
92 int kvm_arch_hardware_setup(void)
97 void kvm_arch_hardware_unsetup(void)
101 void kvm_arch_check_processor_compat(void *rtn
)
103 *(int *)rtn
= kvmppc_core_check_processor_compat();
106 struct kvm
*kvm_arch_create_vm(void)
110 kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
112 return ERR_PTR(-ENOMEM
);
117 static void kvmppc_free_vcpus(struct kvm
*kvm
)
120 struct kvm_vcpu
*vcpu
;
122 kvm_for_each_vcpu(i
, vcpu
, kvm
)
123 kvm_arch_vcpu_free(vcpu
);
125 mutex_lock(&kvm
->lock
);
126 for (i
= 0; i
< atomic_read(&kvm
->online_vcpus
); i
++)
127 kvm
->vcpus
[i
] = NULL
;
129 atomic_set(&kvm
->online_vcpus
, 0);
130 mutex_unlock(&kvm
->lock
);
133 void kvm_arch_sync_events(struct kvm
*kvm
)
137 void kvm_arch_destroy_vm(struct kvm
*kvm
)
139 kvmppc_free_vcpus(kvm
);
140 kvm_free_physmem(kvm
);
141 cleanup_srcu_struct(&kvm
->srcu
);
145 int kvm_dev_ioctl_check_extension(long ext
)
150 case KVM_CAP_PPC_SEGSTATE
:
151 case KVM_CAP_PPC_PAIRED_SINGLES
:
152 case KVM_CAP_PPC_UNSET_IRQ
:
153 case KVM_CAP_ENABLE_CAP
:
154 case KVM_CAP_PPC_OSI
:
157 case KVM_CAP_COALESCED_MMIO
:
158 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
168 long kvm_arch_dev_ioctl(struct file
*filp
,
169 unsigned int ioctl
, unsigned long arg
)
174 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
175 struct kvm_memory_slot
*memslot
,
176 struct kvm_memory_slot old
,
177 struct kvm_userspace_memory_region
*mem
,
183 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
184 struct kvm_userspace_memory_region
*mem
,
185 struct kvm_memory_slot old
,
192 void kvm_arch_flush_shadow(struct kvm
*kvm
)
196 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
)
198 struct kvm_vcpu
*vcpu
;
199 vcpu
= kvmppc_core_vcpu_create(kvm
, id
);
201 kvmppc_create_vcpu_debugfs(vcpu
, id
);
205 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
207 /* Make sure we're not using the vcpu anymore */
208 hrtimer_cancel(&vcpu
->arch
.dec_timer
);
209 tasklet_kill(&vcpu
->arch
.tasklet
);
211 kvmppc_remove_vcpu_debugfs(vcpu
);
212 kvmppc_core_vcpu_free(vcpu
);
215 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
217 kvm_arch_vcpu_free(vcpu
);
220 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
)
222 return kvmppc_core_pending_dec(vcpu
);
225 static void kvmppc_decrementer_func(unsigned long data
)
227 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)data
;
229 kvmppc_core_queue_dec(vcpu
);
231 if (waitqueue_active(&vcpu
->wq
)) {
232 wake_up_interruptible(&vcpu
->wq
);
233 vcpu
->stat
.halt_wakeup
++;
238 * low level hrtimer wake routine. Because this runs in hardirq context
239 * we schedule a tasklet to do the real work.
241 enum hrtimer_restart
kvmppc_decrementer_wakeup(struct hrtimer
*timer
)
243 struct kvm_vcpu
*vcpu
;
245 vcpu
= container_of(timer
, struct kvm_vcpu
, arch
.dec_timer
);
246 tasklet_schedule(&vcpu
->arch
.tasklet
);
248 return HRTIMER_NORESTART
;
251 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
253 hrtimer_init(&vcpu
->arch
.dec_timer
, CLOCK_REALTIME
, HRTIMER_MODE_ABS
);
254 tasklet_init(&vcpu
->arch
.tasklet
, kvmppc_decrementer_func
, (ulong
)vcpu
);
255 vcpu
->arch
.dec_timer
.function
= kvmppc_decrementer_wakeup
;
260 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
262 kvmppc_mmu_destroy(vcpu
);
265 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
267 kvmppc_core_vcpu_load(vcpu
, cpu
);
270 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
272 kvmppc_core_vcpu_put(vcpu
);
275 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
276 struct kvm_guest_debug
*dbg
)
281 static void kvmppc_complete_dcr_load(struct kvm_vcpu
*vcpu
,
284 kvmppc_set_gpr(vcpu
, vcpu
->arch
.io_gpr
, run
->dcr
.data
);
287 static void kvmppc_complete_mmio_load(struct kvm_vcpu
*vcpu
,
292 if (run
->mmio
.len
> sizeof(gpr
)) {
293 printk(KERN_ERR
"bad MMIO length: %d\n", run
->mmio
.len
);
297 if (vcpu
->arch
.mmio_is_bigendian
) {
298 switch (run
->mmio
.len
) {
299 case 8: gpr
= *(u64
*)run
->mmio
.data
; break;
300 case 4: gpr
= *(u32
*)run
->mmio
.data
; break;
301 case 2: gpr
= *(u16
*)run
->mmio
.data
; break;
302 case 1: gpr
= *(u8
*)run
->mmio
.data
; break;
305 /* Convert BE data from userland back to LE. */
306 switch (run
->mmio
.len
) {
307 case 4: gpr
= ld_le32((u32
*)run
->mmio
.data
); break;
308 case 2: gpr
= ld_le16((u16
*)run
->mmio
.data
); break;
309 case 1: gpr
= *(u8
*)run
->mmio
.data
; break;
313 if (vcpu
->arch
.mmio_sign_extend
) {
314 switch (run
->mmio
.len
) {
329 kvmppc_set_gpr(vcpu
, vcpu
->arch
.io_gpr
, gpr
);
331 switch (vcpu
->arch
.io_gpr
& KVM_REG_EXT_MASK
) {
333 kvmppc_set_gpr(vcpu
, vcpu
->arch
.io_gpr
, gpr
);
336 vcpu
->arch
.fpr
[vcpu
->arch
.io_gpr
& KVM_REG_MASK
] = gpr
;
338 #ifdef CONFIG_PPC_BOOK3S
340 vcpu
->arch
.qpr
[vcpu
->arch
.io_gpr
& KVM_REG_MASK
] = gpr
;
343 vcpu
->arch
.fpr
[vcpu
->arch
.io_gpr
& KVM_REG_MASK
] = gpr
;
344 vcpu
->arch
.qpr
[vcpu
->arch
.io_gpr
& KVM_REG_MASK
] = gpr
;
352 int kvmppc_handle_load(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
353 unsigned int rt
, unsigned int bytes
, int is_bigendian
)
355 if (bytes
> sizeof(run
->mmio
.data
)) {
356 printk(KERN_ERR
"%s: bad MMIO length: %d\n", __func__
,
360 run
->mmio
.phys_addr
= vcpu
->arch
.paddr_accessed
;
361 run
->mmio
.len
= bytes
;
362 run
->mmio
.is_write
= 0;
364 vcpu
->arch
.io_gpr
= rt
;
365 vcpu
->arch
.mmio_is_bigendian
= is_bigendian
;
366 vcpu
->mmio_needed
= 1;
367 vcpu
->mmio_is_write
= 0;
368 vcpu
->arch
.mmio_sign_extend
= 0;
370 return EMULATE_DO_MMIO
;
373 /* Same as above, but sign extends */
374 int kvmppc_handle_loads(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
375 unsigned int rt
, unsigned int bytes
, int is_bigendian
)
379 r
= kvmppc_handle_load(run
, vcpu
, rt
, bytes
, is_bigendian
);
380 vcpu
->arch
.mmio_sign_extend
= 1;
385 int kvmppc_handle_store(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
386 u64 val
, unsigned int bytes
, int is_bigendian
)
388 void *data
= run
->mmio
.data
;
390 if (bytes
> sizeof(run
->mmio
.data
)) {
391 printk(KERN_ERR
"%s: bad MMIO length: %d\n", __func__
,
395 run
->mmio
.phys_addr
= vcpu
->arch
.paddr_accessed
;
396 run
->mmio
.len
= bytes
;
397 run
->mmio
.is_write
= 1;
398 vcpu
->mmio_needed
= 1;
399 vcpu
->mmio_is_write
= 1;
401 /* Store the value at the lowest bytes in 'data'. */
404 case 8: *(u64
*)data
= val
; break;
405 case 4: *(u32
*)data
= val
; break;
406 case 2: *(u16
*)data
= val
; break;
407 case 1: *(u8
*)data
= val
; break;
410 /* Store LE value into 'data'. */
412 case 4: st_le32(data
, val
); break;
413 case 2: st_le16(data
, val
); break;
414 case 1: *(u8
*)data
= val
; break;
418 return EMULATE_DO_MMIO
;
421 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
)
426 if (vcpu
->sigset_active
)
427 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
429 if (vcpu
->mmio_needed
) {
430 if (!vcpu
->mmio_is_write
)
431 kvmppc_complete_mmio_load(vcpu
, run
);
432 vcpu
->mmio_needed
= 0;
433 } else if (vcpu
->arch
.dcr_needed
) {
434 if (!vcpu
->arch
.dcr_is_write
)
435 kvmppc_complete_dcr_load(vcpu
, run
);
436 vcpu
->arch
.dcr_needed
= 0;
437 } else if (vcpu
->arch
.osi_needed
) {
438 u64
*gprs
= run
->osi
.gprs
;
441 for (i
= 0; i
< 32; i
++)
442 kvmppc_set_gpr(vcpu
, i
, gprs
[i
]);
443 vcpu
->arch
.osi_needed
= 0;
446 kvmppc_core_deliver_interrupts(vcpu
);
450 r
= __kvmppc_vcpu_run(run
, vcpu
);
454 if (vcpu
->sigset_active
)
455 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
460 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
, struct kvm_interrupt
*irq
)
462 if (irq
->irq
== KVM_INTERRUPT_UNSET
)
463 kvmppc_core_dequeue_external(vcpu
, irq
);
465 kvmppc_core_queue_external(vcpu
, irq
);
467 if (waitqueue_active(&vcpu
->wq
)) {
468 wake_up_interruptible(&vcpu
->wq
);
469 vcpu
->stat
.halt_wakeup
++;
475 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu
*vcpu
,
476 struct kvm_enable_cap
*cap
)
484 case KVM_CAP_PPC_OSI
:
486 vcpu
->arch
.osi_enabled
= true;
496 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
497 struct kvm_mp_state
*mp_state
)
502 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
503 struct kvm_mp_state
*mp_state
)
508 long kvm_arch_vcpu_ioctl(struct file
*filp
,
509 unsigned int ioctl
, unsigned long arg
)
511 struct kvm_vcpu
*vcpu
= filp
->private_data
;
512 void __user
*argp
= (void __user
*)arg
;
515 if (ioctl
== KVM_INTERRUPT
) {
516 struct kvm_interrupt irq
;
518 if (copy_from_user(&irq
, argp
, sizeof(irq
)))
520 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
528 struct kvm_enable_cap cap
;
530 if (copy_from_user(&cap
, argp
, sizeof(cap
)))
532 r
= kvm_vcpu_ioctl_enable_cap(vcpu
, &cap
);
545 long kvm_arch_vm_ioctl(struct file
*filp
,
546 unsigned int ioctl
, unsigned long arg
)
558 int kvm_arch_init(void *opaque
)
563 void kvm_arch_exit(void)