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>
27 #include <asm/cputable.h>
28 #include <asm/uaccess.h>
29 #include <asm/kvm_ppc.h>
32 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
37 int kvm_cpu_has_interrupt(struct kvm_vcpu
*v
)
39 return !!(v
->arch
.pending_exceptions
);
42 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*v
)
44 return !(v
->arch
.msr
& MSR_WE
);
48 int kvmppc_emulate_mmio(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
)
50 enum emulation_result er
;
53 er
= kvmppc_emulate_instruction(run
, vcpu
);
56 /* Future optimization: only reload non-volatiles if they were
57 * actually modified. */
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. */
69 /* XXX Deliver Program interrupt to guest. */
70 printk(KERN_EMERG
"%s: emulation failed (%08x)\n", __func__
,
71 vcpu
->arch
.last_inst
);
81 void kvm_arch_hardware_enable(void *garbage
)
85 void kvm_arch_hardware_disable(void *garbage
)
89 int kvm_arch_hardware_setup(void)
94 void kvm_arch_hardware_unsetup(void)
98 void kvm_arch_check_processor_compat(void *rtn
)
102 if (strcmp(cur_cpu_spec
->platform
, "ppc440") == 0)
110 struct kvm
*kvm_arch_create_vm(void)
114 kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
116 return ERR_PTR(-ENOMEM
);
121 static void kvmppc_free_vcpus(struct kvm
*kvm
)
125 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
127 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
128 kvm
->vcpus
[i
] = NULL
;
133 void kvm_arch_destroy_vm(struct kvm
*kvm
)
135 kvmppc_free_vcpus(kvm
);
136 kvm_free_physmem(kvm
);
140 int kvm_dev_ioctl_check_extension(long ext
)
145 case KVM_CAP_USER_MEMORY
:
148 case KVM_CAP_COALESCED_MMIO
:
149 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
159 long kvm_arch_dev_ioctl(struct file
*filp
,
160 unsigned int ioctl
, unsigned long arg
)
165 int kvm_arch_set_memory_region(struct kvm
*kvm
,
166 struct kvm_userspace_memory_region
*mem
,
167 struct kvm_memory_slot old
,
173 void kvm_arch_flush_shadow(struct kvm
*kvm
)
177 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
)
179 struct kvm_vcpu
*vcpu
;
182 vcpu
= kmem_cache_zalloc(kvm_vcpu_cache
, GFP_KERNEL
);
188 err
= kvm_vcpu_init(vcpu
, kvm
, id
);
195 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
200 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
202 kvm_vcpu_uninit(vcpu
);
203 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
206 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
208 kvm_arch_vcpu_free(vcpu
);
211 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
)
213 unsigned int priority
= exception_priority
[BOOKE_INTERRUPT_DECREMENTER
];
215 return test_bit(priority
, &vcpu
->arch
.pending_exceptions
);
218 static void kvmppc_decrementer_func(unsigned long data
)
220 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)data
;
222 kvmppc_queue_exception(vcpu
, BOOKE_INTERRUPT_DECREMENTER
);
224 if (waitqueue_active(&vcpu
->wq
)) {
225 wake_up_interruptible(&vcpu
->wq
);
226 vcpu
->stat
.halt_wakeup
++;
230 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
232 setup_timer(&vcpu
->arch
.dec_timer
, kvmppc_decrementer_func
,
233 (unsigned long)vcpu
);
238 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
242 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
246 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
250 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu
*vcpu
,
251 struct kvm_debug_guest
*dbg
)
256 static void kvmppc_complete_dcr_load(struct kvm_vcpu
*vcpu
,
259 u32
*gpr
= &vcpu
->arch
.gpr
[vcpu
->arch
.io_gpr
];
260 *gpr
= run
->dcr
.data
;
263 static void kvmppc_complete_mmio_load(struct kvm_vcpu
*vcpu
,
266 u32
*gpr
= &vcpu
->arch
.gpr
[vcpu
->arch
.io_gpr
];
268 if (run
->mmio
.len
> sizeof(*gpr
)) {
269 printk(KERN_ERR
"bad MMIO length: %d\n", run
->mmio
.len
);
273 if (vcpu
->arch
.mmio_is_bigendian
) {
274 switch (run
->mmio
.len
) {
275 case 4: *gpr
= *(u32
*)run
->mmio
.data
; break;
276 case 2: *gpr
= *(u16
*)run
->mmio
.data
; break;
277 case 1: *gpr
= *(u8
*)run
->mmio
.data
; break;
280 /* Convert BE data from userland back to LE. */
281 switch (run
->mmio
.len
) {
282 case 4: *gpr
= ld_le32((u32
*)run
->mmio
.data
); break;
283 case 2: *gpr
= ld_le16((u16
*)run
->mmio
.data
); break;
284 case 1: *gpr
= *(u8
*)run
->mmio
.data
; break;
289 int kvmppc_handle_load(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
290 unsigned int rt
, unsigned int bytes
, int is_bigendian
)
292 if (bytes
> sizeof(run
->mmio
.data
)) {
293 printk(KERN_ERR
"%s: bad MMIO length: %d\n", __func__
,
297 run
->mmio
.phys_addr
= vcpu
->arch
.paddr_accessed
;
298 run
->mmio
.len
= bytes
;
299 run
->mmio
.is_write
= 0;
301 vcpu
->arch
.io_gpr
= rt
;
302 vcpu
->arch
.mmio_is_bigendian
= is_bigendian
;
303 vcpu
->mmio_needed
= 1;
304 vcpu
->mmio_is_write
= 0;
306 return EMULATE_DO_MMIO
;
309 int kvmppc_handle_store(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
310 u32 val
, unsigned int bytes
, int is_bigendian
)
312 void *data
= run
->mmio
.data
;
314 if (bytes
> sizeof(run
->mmio
.data
)) {
315 printk(KERN_ERR
"%s: bad MMIO length: %d\n", __func__
,
319 run
->mmio
.phys_addr
= vcpu
->arch
.paddr_accessed
;
320 run
->mmio
.len
= bytes
;
321 run
->mmio
.is_write
= 1;
322 vcpu
->mmio_needed
= 1;
323 vcpu
->mmio_is_write
= 1;
325 /* Store the value at the lowest bytes in 'data'. */
328 case 4: *(u32
*)data
= val
; break;
329 case 2: *(u16
*)data
= val
; break;
330 case 1: *(u8
*)data
= val
; break;
333 /* Store LE value into 'data'. */
335 case 4: st_le32(data
, val
); break;
336 case 2: st_le16(data
, val
); break;
337 case 1: *(u8
*)data
= val
; break;
341 return EMULATE_DO_MMIO
;
344 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
)
351 if (vcpu
->sigset_active
)
352 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
354 if (vcpu
->mmio_needed
) {
355 if (!vcpu
->mmio_is_write
)
356 kvmppc_complete_mmio_load(vcpu
, run
);
357 vcpu
->mmio_needed
= 0;
358 } else if (vcpu
->arch
.dcr_needed
) {
359 if (!vcpu
->arch
.dcr_is_write
)
360 kvmppc_complete_dcr_load(vcpu
, run
);
361 vcpu
->arch
.dcr_needed
= 0;
364 kvmppc_check_and_deliver_interrupts(vcpu
);
368 r
= __kvmppc_vcpu_run(run
, vcpu
);
372 if (vcpu
->sigset_active
)
373 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
380 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
, struct kvm_interrupt
*irq
)
382 kvmppc_queue_exception(vcpu
, BOOKE_INTERRUPT_EXTERNAL
);
384 if (waitqueue_active(&vcpu
->wq
)) {
385 wake_up_interruptible(&vcpu
->wq
);
386 vcpu
->stat
.halt_wakeup
++;
392 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
393 struct kvm_mp_state
*mp_state
)
398 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
399 struct kvm_mp_state
*mp_state
)
404 long kvm_arch_vcpu_ioctl(struct file
*filp
,
405 unsigned int ioctl
, unsigned long arg
)
407 struct kvm_vcpu
*vcpu
= filp
->private_data
;
408 void __user
*argp
= (void __user
*)arg
;
412 case KVM_INTERRUPT
: {
413 struct kvm_interrupt irq
;
415 if (copy_from_user(&irq
, argp
, sizeof(irq
)))
417 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
428 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
, struct kvm_dirty_log
*log
)
433 long kvm_arch_vm_ioctl(struct file
*filp
,
434 unsigned int ioctl
, unsigned long arg
)
446 int kvm_arch_init(void *opaque
)
451 void kvm_arch_exit(void)