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)
428 if (vcpu->sigset_active)
429 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
431 if (vcpu->mmio_needed) {
432 if (!vcpu->mmio_is_write)
433 kvmppc_complete_mmio_load(vcpu, run);
434 vcpu->mmio_needed = 0;
435 } else if (vcpu->arch.dcr_needed) {
436 if (!vcpu->arch.dcr_is_write)
437 kvmppc_complete_dcr_load(vcpu, run);
438 vcpu->arch.dcr_needed = 0;
439 } else if (vcpu->arch.osi_needed) {
440 u64 *gprs = run->osi.gprs;
443 for (i = 0; i < 32; i++)
444 kvmppc_set_gpr(vcpu, i, gprs[i]);
445 vcpu->arch.osi_needed = 0;
448 kvmppc_core_deliver_interrupts(vcpu);
452 r = __kvmppc_vcpu_run(run, vcpu);
456 if (vcpu->sigset_active)
457 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
464 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
466 if (irq->irq == KVM_INTERRUPT_UNSET)
467 kvmppc_core_dequeue_external(vcpu, irq);
469 kvmppc_core_queue_external(vcpu, irq);
471 if (waitqueue_active(&vcpu->wq)) {
472 wake_up_interruptible(&vcpu->wq);
473 vcpu->stat.halt_wakeup++;
479 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
480 struct kvm_enable_cap *cap)
488 case KVM_CAP_PPC_OSI:
490 vcpu->arch.osi_enabled = true;
500 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
501 struct kvm_mp_state *mp_state)
506 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
507 struct kvm_mp_state *mp_state)
512 long kvm_arch_vcpu_ioctl(struct file *filp,
513 unsigned int ioctl, unsigned long arg)
515 struct kvm_vcpu *vcpu = filp->private_data;
516 void __user *argp = (void __user *)arg;
520 case KVM_INTERRUPT: {
521 struct kvm_interrupt irq;
523 if (copy_from_user(&irq, argp, sizeof(irq)))
525 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
530 struct kvm_enable_cap cap;
532 if (copy_from_user(&cap, argp, sizeof(cap)))
534 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)