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>
30 #include <asm/tlbflush.h>
31 #include "../mm/mmu_decl.h"
34 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
39 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
41 return !!(v->arch.pending_exceptions);
44 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
46 return !(v->arch.msr & MSR_WE);
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 vcpu->arch.last_inst);
83 void 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)
104 if (strcmp(cur_cpu_spec->platform, "ppc440") == 0)
112 struct kvm *kvm_arch_create_vm(void)
116 kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
118 return ERR_PTR(-ENOMEM);
123 static void kvmppc_free_vcpus(struct kvm *kvm)
127 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
129 kvm_arch_vcpu_free(kvm->vcpus[i]);
130 kvm->vcpus[i] = NULL;
135 void kvm_arch_destroy_vm(struct kvm *kvm)
137 kvmppc_free_vcpus(kvm);
138 kvm_free_physmem(kvm);
142 int kvm_dev_ioctl_check_extension(long ext)
147 case KVM_CAP_USER_MEMORY:
150 case KVM_CAP_COALESCED_MMIO:
151 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
161 long kvm_arch_dev_ioctl(struct file *filp,
162 unsigned int ioctl, unsigned long arg)
167 int kvm_arch_set_memory_region(struct kvm *kvm,
168 struct kvm_userspace_memory_region *mem,
169 struct kvm_memory_slot old,
175 void kvm_arch_flush_shadow(struct kvm *kvm)
179 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
181 struct kvm_vcpu *vcpu;
184 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
190 err = kvm_vcpu_init(vcpu, kvm, id);
197 kmem_cache_free(kvm_vcpu_cache, vcpu);
202 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
204 kvm_vcpu_uninit(vcpu);
205 kmem_cache_free(kvm_vcpu_cache, vcpu);
208 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
210 kvm_arch_vcpu_free(vcpu);
213 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
215 unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER];
217 return test_bit(priority, &vcpu->arch.pending_exceptions);
220 static void kvmppc_decrementer_func(unsigned long data)
222 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
224 kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER);
226 if (waitqueue_active(&vcpu->wq)) {
227 wake_up_interruptible(&vcpu->wq);
228 vcpu->stat.halt_wakeup++;
232 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
234 setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
235 (unsigned long)vcpu);
240 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
242 kvmppc_core_destroy_mmu(vcpu);
245 /* Note: clearing MSR[DE] just means that the debug interrupt will not be
246 * delivered *immediately*. Instead, it simply sets the appropriate DBSR bits.
247 * If those DBSR bits are still set when MSR[DE] is re-enabled, the interrupt
248 * will be delivered as an "imprecise debug event" (which is indicated by
251 static void kvmppc_disable_debug_interrupts(void)
253 mtmsr(mfmsr() & ~MSR_DE);
256 static void kvmppc_restore_host_debug_state(struct kvm_vcpu *vcpu)
258 kvmppc_disable_debug_interrupts();
260 mtspr(SPRN_IAC1, vcpu->arch.host_iac[0]);
261 mtspr(SPRN_IAC2, vcpu->arch.host_iac[1]);
262 mtspr(SPRN_IAC3, vcpu->arch.host_iac[2]);
263 mtspr(SPRN_IAC4, vcpu->arch.host_iac[3]);
264 mtspr(SPRN_DBCR1, vcpu->arch.host_dbcr1);
265 mtspr(SPRN_DBCR2, vcpu->arch.host_dbcr2);
266 mtspr(SPRN_DBCR0, vcpu->arch.host_dbcr0);
267 mtmsr(vcpu->arch.host_msr);
270 static void kvmppc_load_guest_debug_registers(struct kvm_vcpu *vcpu)
272 struct kvm_guest_debug *dbg = &vcpu->guest_debug;
275 vcpu->arch.host_msr = mfmsr();
276 kvmppc_disable_debug_interrupts();
278 /* Save host debug register state. */
279 vcpu->arch.host_iac[0] = mfspr(SPRN_IAC1);
280 vcpu->arch.host_iac[1] = mfspr(SPRN_IAC2);
281 vcpu->arch.host_iac[2] = mfspr(SPRN_IAC3);
282 vcpu->arch.host_iac[3] = mfspr(SPRN_IAC4);
283 vcpu->arch.host_dbcr0 = mfspr(SPRN_DBCR0);
284 vcpu->arch.host_dbcr1 = mfspr(SPRN_DBCR1);
285 vcpu->arch.host_dbcr2 = mfspr(SPRN_DBCR2);
287 /* set registers up for guest */
290 mtspr(SPRN_IAC1, dbg->bp[0]);
291 dbcr0 |= DBCR0_IAC1 | DBCR0_IDM;
294 mtspr(SPRN_IAC2, dbg->bp[1]);
295 dbcr0 |= DBCR0_IAC2 | DBCR0_IDM;
298 mtspr(SPRN_IAC3, dbg->bp[2]);
299 dbcr0 |= DBCR0_IAC3 | DBCR0_IDM;
302 mtspr(SPRN_IAC4, dbg->bp[3]);
303 dbcr0 |= DBCR0_IAC4 | DBCR0_IDM;
306 mtspr(SPRN_DBCR0, dbcr0);
307 mtspr(SPRN_DBCR1, 0);
308 mtspr(SPRN_DBCR2, 0);
311 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
315 if (vcpu->guest_debug.enabled)
316 kvmppc_load_guest_debug_registers(vcpu);
318 /* Mark every guest entry in the shadow TLB entry modified, so that they
319 * will all be reloaded on the next vcpu run (instead of being
320 * demand-faulted). */
321 for (i = 0; i <= tlb_44x_hwater; i++)
322 kvmppc_tlbe_set_modified(vcpu, i);
325 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
327 if (vcpu->guest_debug.enabled)
328 kvmppc_restore_host_debug_state(vcpu);
330 /* Don't leave guest TLB entries resident when being de-scheduled. */
331 /* XXX It would be nice to differentiate between heavyweight exit and
332 * sched_out here, since we could avoid the TLB flush for heavyweight
337 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
338 struct kvm_debug_guest *dbg)
342 vcpu->guest_debug.enabled = dbg->enabled;
343 if (vcpu->guest_debug.enabled) {
344 for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) {
345 if (dbg->breakpoints[i].enabled)
346 vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
348 vcpu->guest_debug.bp[i] = 0;
355 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
358 u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
359 *gpr = run->dcr.data;
362 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
365 u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
367 if (run->mmio.len > sizeof(*gpr)) {
368 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
372 if (vcpu->arch.mmio_is_bigendian) {
373 switch (run->mmio.len) {
374 case 4: *gpr = *(u32 *)run->mmio.data; break;
375 case 2: *gpr = *(u16 *)run->mmio.data; break;
376 case 1: *gpr = *(u8 *)run->mmio.data; break;
379 /* Convert BE data from userland back to LE. */
380 switch (run->mmio.len) {
381 case 4: *gpr = ld_le32((u32 *)run->mmio.data); break;
382 case 2: *gpr = ld_le16((u16 *)run->mmio.data); break;
383 case 1: *gpr = *(u8 *)run->mmio.data; break;
388 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
389 unsigned int rt, unsigned int bytes, int is_bigendian)
391 if (bytes > sizeof(run->mmio.data)) {
392 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
396 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
397 run->mmio.len = bytes;
398 run->mmio.is_write = 0;
400 vcpu->arch.io_gpr = rt;
401 vcpu->arch.mmio_is_bigendian = is_bigendian;
402 vcpu->mmio_needed = 1;
403 vcpu->mmio_is_write = 0;
405 return EMULATE_DO_MMIO;
408 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
409 u32 val, unsigned int bytes, int is_bigendian)
411 void *data = run->mmio.data;
413 if (bytes > sizeof(run->mmio.data)) {
414 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
418 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
419 run->mmio.len = bytes;
420 run->mmio.is_write = 1;
421 vcpu->mmio_needed = 1;
422 vcpu->mmio_is_write = 1;
424 /* Store the value at the lowest bytes in 'data'. */
427 case 4: *(u32 *)data = val; break;
428 case 2: *(u16 *)data = val; break;
429 case 1: *(u8 *)data = val; break;
432 /* Store LE value into 'data'. */
434 case 4: st_le32(data, val); break;
435 case 2: st_le16(data, val); break;
436 case 1: *(u8 *)data = val; break;
440 return EMULATE_DO_MMIO;
443 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
450 if (vcpu->sigset_active)
451 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
453 if (vcpu->mmio_needed) {
454 if (!vcpu->mmio_is_write)
455 kvmppc_complete_mmio_load(vcpu, run);
456 vcpu->mmio_needed = 0;
457 } else if (vcpu->arch.dcr_needed) {
458 if (!vcpu->arch.dcr_is_write)
459 kvmppc_complete_dcr_load(vcpu, run);
460 vcpu->arch.dcr_needed = 0;
463 kvmppc_check_and_deliver_interrupts(vcpu);
467 r = __kvmppc_vcpu_run(run, vcpu);
471 if (vcpu->sigset_active)
472 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
479 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
481 kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL);
483 if (waitqueue_active(&vcpu->wq)) {
484 wake_up_interruptible(&vcpu->wq);
485 vcpu->stat.halt_wakeup++;
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);
527 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
532 long kvm_arch_vm_ioctl(struct file *filp,
533 unsigned int ioctl, unsigned long arg)
545 int kvm_arch_init(void *opaque)
550 void kvm_arch_exit(void)