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 <asm/cputable.h>
29 #include <asm/uaccess.h>
30 #include <asm/kvm_ppc.h>
31 #include <asm/tlbflush.h>
33 #include "../mm/mmu_decl.h"
35 #define CREATE_TRACE_POINTS
38 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
43 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*v
)
45 return !(v
->arch
.msr
& MSR_WE
) || !!(v
->arch
.pending_exceptions
);
49 int kvmppc_emulate_mmio(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
)
51 enum emulation_result er
;
54 er
= kvmppc_emulate_instruction(run
, vcpu
);
57 /* Future optimization: only reload non-volatiles if they were
58 * actually modified. */
62 run
->exit_reason
= KVM_EXIT_MMIO
;
63 /* We must reload nonvolatiles because "update" load/store
64 * instructions modify register state. */
65 /* Future optimization: only reload non-volatiles if they were
66 * actually modified. */
70 /* XXX Deliver Program interrupt to guest. */
71 printk(KERN_EMERG
"%s: emulation failed (%08x)\n", __func__
,
72 vcpu
->arch
.last_inst
);
82 int kvm_arch_hardware_enable(void *garbage
)
87 void kvm_arch_hardware_disable(void *garbage
)
91 int kvm_arch_hardware_setup(void)
96 void kvm_arch_hardware_unsetup(void)
100 void kvm_arch_check_processor_compat(void *rtn
)
102 *(int *)rtn
= kvmppc_core_check_processor_compat();
105 struct kvm
*kvm_arch_create_vm(void)
109 kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
111 return ERR_PTR(-ENOMEM
);
116 static void kvmppc_free_vcpus(struct kvm
*kvm
)
119 struct kvm_vcpu
*vcpu
;
121 kvm_for_each_vcpu(i
, vcpu
, kvm
)
122 kvm_arch_vcpu_free(vcpu
);
124 mutex_lock(&kvm
->lock
);
125 for (i
= 0; i
< atomic_read(&kvm
->online_vcpus
); i
++)
126 kvm
->vcpus
[i
] = NULL
;
128 atomic_set(&kvm
->online_vcpus
, 0);
129 mutex_unlock(&kvm
->lock
);
132 void kvm_arch_sync_events(struct kvm
*kvm
)
136 void kvm_arch_destroy_vm(struct kvm
*kvm
)
138 kvmppc_free_vcpus(kvm
);
139 kvm_free_physmem(kvm
);
140 cleanup_srcu_struct(&kvm
->srcu
);
144 int kvm_dev_ioctl_check_extension(long ext
)
149 case KVM_CAP_PPC_SEGSTATE
:
152 case KVM_CAP_COALESCED_MMIO
:
153 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
163 long kvm_arch_dev_ioctl(struct file
*filp
,
164 unsigned int ioctl
, unsigned long arg
)
169 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
170 struct kvm_memory_slot
*memslot
,
171 struct kvm_memory_slot old
,
172 struct kvm_userspace_memory_region
*mem
,
178 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
179 struct kvm_userspace_memory_region
*mem
,
180 struct kvm_memory_slot old
,
187 void kvm_arch_flush_shadow(struct kvm
*kvm
)
191 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
)
193 struct kvm_vcpu
*vcpu
;
194 vcpu
= kvmppc_core_vcpu_create(kvm
, id
);
195 kvmppc_create_vcpu_debugfs(vcpu
, id
);
199 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
201 kvmppc_remove_vcpu_debugfs(vcpu
);
202 kvmppc_core_vcpu_free(vcpu
);
205 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
207 kvm_arch_vcpu_free(vcpu
);
210 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
)
212 return kvmppc_core_pending_dec(vcpu
);
215 static void kvmppc_decrementer_func(unsigned long data
)
217 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)data
;
219 kvmppc_core_queue_dec(vcpu
);
221 if (waitqueue_active(&vcpu
->wq
)) {
222 wake_up_interruptible(&vcpu
->wq
);
223 vcpu
->stat
.halt_wakeup
++;
228 * low level hrtimer wake routine. Because this runs in hardirq context
229 * we schedule a tasklet to do the real work.
231 enum hrtimer_restart
kvmppc_decrementer_wakeup(struct hrtimer
*timer
)
233 struct kvm_vcpu
*vcpu
;
235 vcpu
= container_of(timer
, struct kvm_vcpu
, arch
.dec_timer
);
236 tasklet_schedule(&vcpu
->arch
.tasklet
);
238 return HRTIMER_NORESTART
;
241 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
243 hrtimer_init(&vcpu
->arch
.dec_timer
, CLOCK_REALTIME
, HRTIMER_MODE_ABS
);
244 tasklet_init(&vcpu
->arch
.tasklet
, kvmppc_decrementer_func
, (ulong
)vcpu
);
245 vcpu
->arch
.dec_timer
.function
= kvmppc_decrementer_wakeup
;
250 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
252 kvmppc_mmu_destroy(vcpu
);
255 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
257 kvmppc_core_vcpu_load(vcpu
, cpu
);
260 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
262 kvmppc_core_vcpu_put(vcpu
);
265 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
266 struct kvm_guest_debug
*dbg
)
271 static void kvmppc_complete_dcr_load(struct kvm_vcpu
*vcpu
,
274 kvmppc_set_gpr(vcpu
, vcpu
->arch
.io_gpr
, run
->dcr
.data
);
277 static void kvmppc_complete_mmio_load(struct kvm_vcpu
*vcpu
,
282 if (run
->mmio
.len
> sizeof(gpr
)) {
283 printk(KERN_ERR
"bad MMIO length: %d\n", run
->mmio
.len
);
287 if (vcpu
->arch
.mmio_is_bigendian
) {
288 switch (run
->mmio
.len
) {
289 case 4: gpr
= *(u32
*)run
->mmio
.data
; break;
290 case 2: gpr
= *(u16
*)run
->mmio
.data
; break;
291 case 1: gpr
= *(u8
*)run
->mmio
.data
; break;
294 /* Convert BE data from userland back to LE. */
295 switch (run
->mmio
.len
) {
296 case 4: gpr
= ld_le32((u32
*)run
->mmio
.data
); break;
297 case 2: gpr
= ld_le16((u16
*)run
->mmio
.data
); break;
298 case 1: gpr
= *(u8
*)run
->mmio
.data
; break;
302 kvmppc_set_gpr(vcpu
, vcpu
->arch
.io_gpr
, gpr
);
305 int kvmppc_handle_load(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
306 unsigned int rt
, unsigned int bytes
, int is_bigendian
)
308 if (bytes
> sizeof(run
->mmio
.data
)) {
309 printk(KERN_ERR
"%s: bad MMIO length: %d\n", __func__
,
313 run
->mmio
.phys_addr
= vcpu
->arch
.paddr_accessed
;
314 run
->mmio
.len
= bytes
;
315 run
->mmio
.is_write
= 0;
317 vcpu
->arch
.io_gpr
= rt
;
318 vcpu
->arch
.mmio_is_bigendian
= is_bigendian
;
319 vcpu
->mmio_needed
= 1;
320 vcpu
->mmio_is_write
= 0;
322 return EMULATE_DO_MMIO
;
325 int kvmppc_handle_store(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
326 u32 val
, unsigned int bytes
, int is_bigendian
)
328 void *data
= run
->mmio
.data
;
330 if (bytes
> sizeof(run
->mmio
.data
)) {
331 printk(KERN_ERR
"%s: bad MMIO length: %d\n", __func__
,
335 run
->mmio
.phys_addr
= vcpu
->arch
.paddr_accessed
;
336 run
->mmio
.len
= bytes
;
337 run
->mmio
.is_write
= 1;
338 vcpu
->mmio_needed
= 1;
339 vcpu
->mmio_is_write
= 1;
341 /* Store the value at the lowest bytes in 'data'. */
344 case 4: *(u32
*)data
= val
; break;
345 case 2: *(u16
*)data
= val
; break;
346 case 1: *(u8
*)data
= val
; break;
349 /* Store LE value into 'data'. */
351 case 4: st_le32(data
, val
); break;
352 case 2: st_le16(data
, val
); break;
353 case 1: *(u8
*)data
= val
; break;
357 return EMULATE_DO_MMIO
;
360 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
)
367 if (vcpu
->sigset_active
)
368 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
370 if (vcpu
->mmio_needed
) {
371 if (!vcpu
->mmio_is_write
)
372 kvmppc_complete_mmio_load(vcpu
, run
);
373 vcpu
->mmio_needed
= 0;
374 } else if (vcpu
->arch
.dcr_needed
) {
375 if (!vcpu
->arch
.dcr_is_write
)
376 kvmppc_complete_dcr_load(vcpu
, run
);
377 vcpu
->arch
.dcr_needed
= 0;
380 kvmppc_core_deliver_interrupts(vcpu
);
384 r
= __kvmppc_vcpu_run(run
, vcpu
);
388 if (vcpu
->sigset_active
)
389 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
396 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
, struct kvm_interrupt
*irq
)
398 kvmppc_core_queue_external(vcpu
, irq
);
400 if (waitqueue_active(&vcpu
->wq
)) {
401 wake_up_interruptible(&vcpu
->wq
);
402 vcpu
->stat
.halt_wakeup
++;
408 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
409 struct kvm_mp_state
*mp_state
)
414 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
415 struct kvm_mp_state
*mp_state
)
420 long kvm_arch_vcpu_ioctl(struct file
*filp
,
421 unsigned int ioctl
, unsigned long arg
)
423 struct kvm_vcpu
*vcpu
= filp
->private_data
;
424 void __user
*argp
= (void __user
*)arg
;
428 case KVM_INTERRUPT
: {
429 struct kvm_interrupt irq
;
431 if (copy_from_user(&irq
, argp
, sizeof(irq
)))
433 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
444 long kvm_arch_vm_ioctl(struct file
*filp
,
445 unsigned int ioctl
, unsigned long arg
)
457 int kvm_arch_init(void *opaque
)
462 void kvm_arch_exit(void)