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.msr & MSR_WE) || !!(v->arch.pending_exceptions);
45 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
47 enum emulation_result er;
50 er = kvmppc_emulate_instruction(run, vcpu);
53 /* Future optimization: only reload non-volatiles if they were
54 * actually modified. */
58 run->exit_reason = KVM_EXIT_MMIO;
59 /* We must reload nonvolatiles because "update" load/store
60 * instructions modify register state. */
61 /* Future optimization: only reload non-volatiles if they were
62 * actually modified. */
66 /* XXX Deliver Program interrupt to guest. */
67 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
68 kvmppc_get_last_inst(vcpu));
78 int kvm_arch_hardware_enable(void *garbage)
83 void kvm_arch_hardware_disable(void *garbage)
87 int kvm_arch_hardware_setup(void)
92 void kvm_arch_hardware_unsetup(void)
96 void kvm_arch_check_processor_compat(void *rtn)
98 *(int *)rtn = kvmppc_core_check_processor_compat();
101 struct kvm *kvm_arch_create_vm(void)
105 kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
107 return ERR_PTR(-ENOMEM);
112 static void kvmppc_free_vcpus(struct kvm *kvm)
115 struct kvm_vcpu *vcpu;
117 kvm_for_each_vcpu(i, vcpu, kvm)
118 kvm_arch_vcpu_free(vcpu);
120 mutex_lock(&kvm->lock);
121 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
122 kvm->vcpus[i] = NULL;
124 atomic_set(&kvm->online_vcpus, 0);
125 mutex_unlock(&kvm->lock);
128 void kvm_arch_sync_events(struct kvm *kvm)
132 void kvm_arch_destroy_vm(struct kvm *kvm)
134 kvmppc_free_vcpus(kvm);
135 kvm_free_physmem(kvm);
136 cleanup_srcu_struct(&kvm->srcu);
140 int kvm_dev_ioctl_check_extension(long ext)
145 case KVM_CAP_PPC_SEGSTATE:
146 case KVM_CAP_PPC_PAIRED_SINGLES:
147 case KVM_CAP_PPC_UNSET_IRQ:
148 case KVM_CAP_ENABLE_CAP:
149 case KVM_CAP_PPC_OSI:
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);
196 kvmppc_create_vcpu_debugfs(vcpu, id);
200 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
202 /* Make sure we're not using the vcpu anymore */
203 hrtimer_cancel(&vcpu->arch.dec_timer);
204 tasklet_kill(&vcpu->arch.tasklet);
206 kvmppc_remove_vcpu_debugfs(vcpu);
207 kvmppc_core_vcpu_free(vcpu);
210 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
212 kvm_arch_vcpu_free(vcpu);
215 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
217 return kvmppc_core_pending_dec(vcpu);
220 static void kvmppc_decrementer_func(unsigned long data)
222 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
224 kvmppc_core_queue_dec(vcpu);
226 if (waitqueue_active(&vcpu->wq)) {
227 wake_up_interruptible(&vcpu->wq);
228 vcpu->stat.halt_wakeup++;
233 * low level hrtimer wake routine. Because this runs in hardirq context
234 * we schedule a tasklet to do the real work.
236 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
238 struct kvm_vcpu *vcpu;
240 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
241 tasklet_schedule(&vcpu->arch.tasklet);
243 return HRTIMER_NORESTART;
246 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
248 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
249 tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
250 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
255 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
257 kvmppc_mmu_destroy(vcpu);
260 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
262 kvmppc_core_vcpu_load(vcpu, cpu);
265 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
267 kvmppc_core_vcpu_put(vcpu);
270 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
271 struct kvm_guest_debug *dbg)
276 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
279 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
282 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
285 u64 uninitialized_var(gpr);
287 if (run->mmio.len > sizeof(gpr)) {
288 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
292 if (vcpu->arch.mmio_is_bigendian) {
293 switch (run->mmio.len) {
294 case 8: gpr = *(u64 *)run->mmio.data; break;
295 case 4: gpr = *(u32 *)run->mmio.data; break;
296 case 2: gpr = *(u16 *)run->mmio.data; break;
297 case 1: gpr = *(u8 *)run->mmio.data; break;
300 /* Convert BE data from userland back to LE. */
301 switch (run->mmio.len) {
302 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
303 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
304 case 1: gpr = *(u8 *)run->mmio.data; break;
308 if (vcpu->arch.mmio_sign_extend) {
309 switch (run->mmio.len) {
324 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
326 switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
328 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
331 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
333 #ifdef CONFIG_PPC_BOOK3S
335 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
338 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
339 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
347 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
348 unsigned int rt, unsigned int bytes, int is_bigendian)
350 if (bytes > sizeof(run->mmio.data)) {
351 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
355 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
356 run->mmio.len = bytes;
357 run->mmio.is_write = 0;
359 vcpu->arch.io_gpr = rt;
360 vcpu->arch.mmio_is_bigendian = is_bigendian;
361 vcpu->mmio_needed = 1;
362 vcpu->mmio_is_write = 0;
363 vcpu->arch.mmio_sign_extend = 0;
365 return EMULATE_DO_MMIO;
368 /* Same as above, but sign extends */
369 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
370 unsigned int rt, unsigned int bytes, int is_bigendian)
374 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
375 vcpu->arch.mmio_sign_extend = 1;
380 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
381 u64 val, unsigned int bytes, int is_bigendian)
383 void *data = run->mmio.data;
385 if (bytes > sizeof(run->mmio.data)) {
386 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
390 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
391 run->mmio.len = bytes;
392 run->mmio.is_write = 1;
393 vcpu->mmio_needed = 1;
394 vcpu->mmio_is_write = 1;
396 /* Store the value at the lowest bytes in 'data'. */
399 case 8: *(u64 *)data = val; break;
400 case 4: *(u32 *)data = val; break;
401 case 2: *(u16 *)data = val; break;
402 case 1: *(u8 *)data = val; break;
405 /* Store LE value into 'data'. */
407 case 4: st_le32(data, val); break;
408 case 2: st_le16(data, val); break;
409 case 1: *(u8 *)data = val; break;
413 return EMULATE_DO_MMIO;
416 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
421 if (vcpu->sigset_active)
422 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
424 if (vcpu->mmio_needed) {
425 if (!vcpu->mmio_is_write)
426 kvmppc_complete_mmio_load(vcpu, run);
427 vcpu->mmio_needed = 0;
428 } else if (vcpu->arch.dcr_needed) {
429 if (!vcpu->arch.dcr_is_write)
430 kvmppc_complete_dcr_load(vcpu, run);
431 vcpu->arch.dcr_needed = 0;
432 } else if (vcpu->arch.osi_needed) {
433 u64 *gprs = run->osi.gprs;
436 for (i = 0; i < 32; i++)
437 kvmppc_set_gpr(vcpu, i, gprs[i]);
438 vcpu->arch.osi_needed = 0;
441 kvmppc_core_deliver_interrupts(vcpu);
445 r = __kvmppc_vcpu_run(run, vcpu);
449 if (vcpu->sigset_active)
450 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
455 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
457 if (irq->irq == KVM_INTERRUPT_UNSET)
458 kvmppc_core_dequeue_external(vcpu, irq);
460 kvmppc_core_queue_external(vcpu, irq);
462 if (waitqueue_active(&vcpu->wq)) {
463 wake_up_interruptible(&vcpu->wq);
464 vcpu->stat.halt_wakeup++;
470 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
471 struct kvm_enable_cap *cap)
479 case KVM_CAP_PPC_OSI:
481 vcpu->arch.osi_enabled = true;
491 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
492 struct kvm_mp_state *mp_state)
497 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
498 struct kvm_mp_state *mp_state)
503 long kvm_arch_vcpu_ioctl(struct file *filp,
504 unsigned int ioctl, unsigned long arg)
506 struct kvm_vcpu *vcpu = filp->private_data;
507 void __user *argp = (void __user *)arg;
511 case KVM_INTERRUPT: {
512 struct kvm_interrupt irq;
514 if (copy_from_user(&irq, argp, sizeof(irq)))
516 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
522 struct kvm_enable_cap cap;
524 if (copy_from_user(&cap, argp, sizeof(cap)))
526 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
537 long kvm_arch_vm_ioctl(struct file *filp,
538 unsigned int ioctl, unsigned long arg)
550 int kvm_arch_init(void *opaque)
555 void kvm_arch_exit(void)