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 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
41 return !(v->arch.shared->msr & MSR_WE) ||
42 !!(v->arch.pending_exceptions);
46 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
48 enum emulation_result er;
51 er = kvmppc_emulate_instruction(run, vcpu);
54 /* Future optimization: only reload non-volatiles if they were
55 * actually modified. */
59 run->exit_reason = KVM_EXIT_MMIO;
60 /* We must reload nonvolatiles because "update" load/store
61 * instructions modify register state. */
62 /* Future optimization: only reload non-volatiles if they were
63 * actually modified. */
67 /* XXX Deliver Program interrupt to guest. */
68 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
69 kvmppc_get_last_inst(vcpu));
79 int kvm_arch_hardware_enable(void *garbage)
84 void kvm_arch_hardware_disable(void *garbage)
88 int kvm_arch_hardware_setup(void)
93 void kvm_arch_hardware_unsetup(void)
97 void kvm_arch_check_processor_compat(void *rtn)
99 *(int *)rtn = kvmppc_core_check_processor_compat();
102 struct kvm *kvm_arch_create_vm(void)
106 kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
108 return ERR_PTR(-ENOMEM);
113 static void kvmppc_free_vcpus(struct kvm *kvm)
116 struct kvm_vcpu *vcpu;
118 kvm_for_each_vcpu(i, vcpu, kvm)
119 kvm_arch_vcpu_free(vcpu);
121 mutex_lock(&kvm->lock);
122 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
123 kvm->vcpus[i] = NULL;
125 atomic_set(&kvm->online_vcpus, 0);
126 mutex_unlock(&kvm->lock);
129 void kvm_arch_sync_events(struct kvm *kvm)
133 void kvm_arch_destroy_vm(struct kvm *kvm)
135 kvmppc_free_vcpus(kvm);
136 kvm_free_physmem(kvm);
137 cleanup_srcu_struct(&kvm->srcu);
141 int kvm_dev_ioctl_check_extension(long ext)
146 case KVM_CAP_PPC_SEGSTATE:
147 case KVM_CAP_PPC_PAIRED_SINGLES:
148 case KVM_CAP_PPC_UNSET_IRQ:
149 case KVM_CAP_ENABLE_CAP:
150 case KVM_CAP_PPC_OSI:
153 case KVM_CAP_COALESCED_MMIO:
154 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
164 long kvm_arch_dev_ioctl(struct file *filp,
165 unsigned int ioctl, unsigned long arg)
170 int kvm_arch_prepare_memory_region(struct kvm *kvm,
171 struct kvm_memory_slot *memslot,
172 struct kvm_memory_slot old,
173 struct kvm_userspace_memory_region *mem,
179 void kvm_arch_commit_memory_region(struct kvm *kvm,
180 struct kvm_userspace_memory_region *mem,
181 struct kvm_memory_slot old,
188 void kvm_arch_flush_shadow(struct kvm *kvm)
192 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
194 struct kvm_vcpu *vcpu;
195 vcpu = kvmppc_core_vcpu_create(kvm, id);
197 kvmppc_create_vcpu_debugfs(vcpu, id);
201 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
203 /* Make sure we're not using the vcpu anymore */
204 hrtimer_cancel(&vcpu->arch.dec_timer);
205 tasklet_kill(&vcpu->arch.tasklet);
207 kvmppc_remove_vcpu_debugfs(vcpu);
208 kvmppc_core_vcpu_free(vcpu);
211 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
213 kvm_arch_vcpu_free(vcpu);
216 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
218 return kvmppc_core_pending_dec(vcpu);
221 static void kvmppc_decrementer_func(unsigned long data)
223 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
225 kvmppc_core_queue_dec(vcpu);
227 if (waitqueue_active(&vcpu->wq)) {
228 wake_up_interruptible(&vcpu->wq);
229 vcpu->stat.halt_wakeup++;
234 * low level hrtimer wake routine. Because this runs in hardirq context
235 * we schedule a tasklet to do the real work.
237 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
239 struct kvm_vcpu *vcpu;
241 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
242 tasklet_schedule(&vcpu->arch.tasklet);
244 return HRTIMER_NORESTART;
247 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
249 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
250 tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
251 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
256 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
258 kvmppc_mmu_destroy(vcpu);
261 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
263 kvmppc_core_vcpu_load(vcpu, cpu);
266 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
268 kvmppc_core_vcpu_put(vcpu);
271 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
272 struct kvm_guest_debug *dbg)
277 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
280 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
283 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
286 u64 uninitialized_var(gpr);
288 if (run->mmio.len > sizeof(gpr)) {
289 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
293 if (vcpu->arch.mmio_is_bigendian) {
294 switch (run->mmio.len) {
295 case 8: gpr = *(u64 *)run->mmio.data; break;
296 case 4: gpr = *(u32 *)run->mmio.data; break;
297 case 2: gpr = *(u16 *)run->mmio.data; break;
298 case 1: gpr = *(u8 *)run->mmio.data; break;
301 /* Convert BE data from userland back to LE. */
302 switch (run->mmio.len) {
303 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
304 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
305 case 1: gpr = *(u8 *)run->mmio.data; break;
309 if (vcpu->arch.mmio_sign_extend) {
310 switch (run->mmio.len) {
325 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
327 switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
329 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
332 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
334 #ifdef CONFIG_PPC_BOOK3S
336 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
339 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
340 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
348 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
349 unsigned int rt, unsigned int bytes, int is_bigendian)
351 if (bytes > sizeof(run->mmio.data)) {
352 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
356 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
357 run->mmio.len = bytes;
358 run->mmio.is_write = 0;
360 vcpu->arch.io_gpr = rt;
361 vcpu->arch.mmio_is_bigendian = is_bigendian;
362 vcpu->mmio_needed = 1;
363 vcpu->mmio_is_write = 0;
364 vcpu->arch.mmio_sign_extend = 0;
366 return EMULATE_DO_MMIO;
369 /* Same as above, but sign extends */
370 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
371 unsigned int rt, unsigned int bytes, int is_bigendian)
375 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
376 vcpu->arch.mmio_sign_extend = 1;
381 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
382 u64 val, unsigned int bytes, int is_bigendian)
384 void *data = run->mmio.data;
386 if (bytes > sizeof(run->mmio.data)) {
387 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
391 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
392 run->mmio.len = bytes;
393 run->mmio.is_write = 1;
394 vcpu->mmio_needed = 1;
395 vcpu->mmio_is_write = 1;
397 /* Store the value at the lowest bytes in 'data'. */
400 case 8: *(u64 *)data = val; break;
401 case 4: *(u32 *)data = val; break;
402 case 2: *(u16 *)data = val; break;
403 case 1: *(u8 *)data = val; break;
406 /* Store LE value into 'data'. */
408 case 4: st_le32(data, val); break;
409 case 2: st_le16(data, val); break;
410 case 1: *(u8 *)data = val; break;
414 return EMULATE_DO_MMIO;
417 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
422 if (vcpu->sigset_active)
423 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
425 if (vcpu->mmio_needed) {
426 if (!vcpu->mmio_is_write)
427 kvmppc_complete_mmio_load(vcpu, run);
428 vcpu->mmio_needed = 0;
429 } else if (vcpu->arch.dcr_needed) {
430 if (!vcpu->arch.dcr_is_write)
431 kvmppc_complete_dcr_load(vcpu, run);
432 vcpu->arch.dcr_needed = 0;
433 } else if (vcpu->arch.osi_needed) {
434 u64 *gprs = run->osi.gprs;
437 for (i = 0; i < 32; i++)
438 kvmppc_set_gpr(vcpu, i, gprs[i]);
439 vcpu->arch.osi_needed = 0;
442 kvmppc_core_deliver_interrupts(vcpu);
446 r = __kvmppc_vcpu_run(run, vcpu);
450 if (vcpu->sigset_active)
451 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
456 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
458 if (irq->irq == KVM_INTERRUPT_UNSET)
459 kvmppc_core_dequeue_external(vcpu, irq);
461 kvmppc_core_queue_external(vcpu, irq);
463 if (waitqueue_active(&vcpu->wq)) {
464 wake_up_interruptible(&vcpu->wq);
465 vcpu->stat.halt_wakeup++;
471 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
472 struct kvm_enable_cap *cap)
480 case KVM_CAP_PPC_OSI:
482 vcpu->arch.osi_enabled = true;
492 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
493 struct kvm_mp_state *mp_state)
498 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
499 struct kvm_mp_state *mp_state)
504 long kvm_arch_vcpu_ioctl(struct file *filp,
505 unsigned int ioctl, unsigned long arg)
507 struct kvm_vcpu *vcpu = filp->private_data;
508 void __user *argp = (void __user *)arg;
512 case KVM_INTERRUPT: {
513 struct kvm_interrupt irq;
515 if (copy_from_user(&irq, argp, sizeof(irq)))
517 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
523 struct kvm_enable_cap cap;
525 if (copy_from_user(&cap, argp, sizeof(cap)))
527 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
538 long kvm_arch_vm_ioctl(struct file *filp,
539 unsigned int ioctl, unsigned long arg)
551 int kvm_arch_init(void *opaque)
556 void kvm_arch_exit(void)