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>
32 #include "../mm/mmu_decl.h"
34 #define CREATE_TRACE_POINTS
37 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
42 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
44 return !!(v->arch.pending_exceptions);
47 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
49 /* do real check here */
53 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
55 return !(v->arch.msr & MSR_WE);
59 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
61 enum emulation_result er;
64 er = kvmppc_emulate_instruction(run, vcpu);
67 /* Future optimization: only reload non-volatiles if they were
68 * actually modified. */
72 run->exit_reason = KVM_EXIT_MMIO;
73 /* We must reload nonvolatiles because "update" load/store
74 * instructions modify register state. */
75 /* Future optimization: only reload non-volatiles if they were
76 * actually modified. */
80 /* XXX Deliver Program interrupt to guest. */
81 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
82 vcpu->arch.last_inst);
92 void kvm_arch_hardware_enable(void *garbage)
96 void kvm_arch_hardware_disable(void *garbage)
100 int kvm_arch_hardware_setup(void)
105 void kvm_arch_hardware_unsetup(void)
109 void kvm_arch_check_processor_compat(void *rtn)
111 *(int *)rtn = kvmppc_core_check_processor_compat();
114 struct kvm *kvm_arch_create_vm(void)
118 kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
120 return ERR_PTR(-ENOMEM);
125 static void kvmppc_free_vcpus(struct kvm *kvm)
128 struct kvm_vcpu *vcpu;
130 kvm_for_each_vcpu(i, vcpu, kvm)
131 kvm_arch_vcpu_free(vcpu);
133 mutex_lock(&kvm->lock);
134 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
135 kvm->vcpus[i] = NULL;
137 atomic_set(&kvm->online_vcpus, 0);
138 mutex_unlock(&kvm->lock);
141 void kvm_arch_sync_events(struct kvm *kvm)
145 void kvm_arch_destroy_vm(struct kvm *kvm)
147 kvmppc_free_vcpus(kvm);
148 kvm_free_physmem(kvm);
152 int kvm_dev_ioctl_check_extension(long ext)
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_set_memory_region(struct kvm *kvm,
175 struct kvm_userspace_memory_region *mem,
176 struct kvm_memory_slot old,
182 void kvm_arch_flush_shadow(struct kvm *kvm)
186 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
188 struct kvm_vcpu *vcpu;
189 vcpu = kvmppc_core_vcpu_create(kvm, id);
190 kvmppc_create_vcpu_debugfs(vcpu, id);
194 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
196 kvmppc_remove_vcpu_debugfs(vcpu);
197 kvmppc_core_vcpu_free(vcpu);
200 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
202 kvm_arch_vcpu_free(vcpu);
205 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
207 return kvmppc_core_pending_dec(vcpu);
210 static void kvmppc_decrementer_func(unsigned long data)
212 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
214 kvmppc_core_queue_dec(vcpu);
216 if (waitqueue_active(&vcpu->wq)) {
217 wake_up_interruptible(&vcpu->wq);
218 vcpu->stat.halt_wakeup++;
222 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
224 setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
225 (unsigned long)vcpu);
230 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
232 kvmppc_mmu_destroy(vcpu);
235 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
237 kvmppc_core_vcpu_load(vcpu, cpu);
240 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
242 kvmppc_core_vcpu_put(vcpu);
245 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
246 struct kvm_guest_debug *dbg)
251 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
254 ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
255 *gpr = run->dcr.data;
258 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
261 ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
263 if (run->mmio.len > sizeof(*gpr)) {
264 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
268 if (vcpu->arch.mmio_is_bigendian) {
269 switch (run->mmio.len) {
270 case 4: *gpr = *(u32 *)run->mmio.data; break;
271 case 2: *gpr = *(u16 *)run->mmio.data; break;
272 case 1: *gpr = *(u8 *)run->mmio.data; break;
275 /* Convert BE data from userland back to LE. */
276 switch (run->mmio.len) {
277 case 4: *gpr = ld_le32((u32 *)run->mmio.data); break;
278 case 2: *gpr = ld_le16((u16 *)run->mmio.data); break;
279 case 1: *gpr = *(u8 *)run->mmio.data; break;
284 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
285 unsigned int rt, unsigned int bytes, int is_bigendian)
287 if (bytes > sizeof(run->mmio.data)) {
288 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
292 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
293 run->mmio.len = bytes;
294 run->mmio.is_write = 0;
296 vcpu->arch.io_gpr = rt;
297 vcpu->arch.mmio_is_bigendian = is_bigendian;
298 vcpu->mmio_needed = 1;
299 vcpu->mmio_is_write = 0;
301 return EMULATE_DO_MMIO;
304 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
305 u32 val, unsigned int bytes, int is_bigendian)
307 void *data = run->mmio.data;
309 if (bytes > sizeof(run->mmio.data)) {
310 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
314 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
315 run->mmio.len = bytes;
316 run->mmio.is_write = 1;
317 vcpu->mmio_needed = 1;
318 vcpu->mmio_is_write = 1;
320 /* Store the value at the lowest bytes in 'data'. */
323 case 4: *(u32 *)data = val; break;
324 case 2: *(u16 *)data = val; break;
325 case 1: *(u8 *)data = val; break;
328 /* Store LE value into 'data'. */
330 case 4: st_le32(data, val); break;
331 case 2: st_le16(data, val); break;
332 case 1: *(u8 *)data = val; break;
336 return EMULATE_DO_MMIO;
339 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
346 if (vcpu->sigset_active)
347 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
349 if (vcpu->mmio_needed) {
350 if (!vcpu->mmio_is_write)
351 kvmppc_complete_mmio_load(vcpu, run);
352 vcpu->mmio_needed = 0;
353 } else if (vcpu->arch.dcr_needed) {
354 if (!vcpu->arch.dcr_is_write)
355 kvmppc_complete_dcr_load(vcpu, run);
356 vcpu->arch.dcr_needed = 0;
359 kvmppc_core_deliver_interrupts(vcpu);
363 r = __kvmppc_vcpu_run(run, vcpu);
367 if (vcpu->sigset_active)
368 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
375 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
377 kvmppc_core_queue_external(vcpu, irq);
379 if (waitqueue_active(&vcpu->wq)) {
380 wake_up_interruptible(&vcpu->wq);
381 vcpu->stat.halt_wakeup++;
387 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
388 struct kvm_mp_state *mp_state)
393 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
394 struct kvm_mp_state *mp_state)
399 long kvm_arch_vcpu_ioctl(struct file *filp,
400 unsigned int ioctl, unsigned long arg)
402 struct kvm_vcpu *vcpu = filp->private_data;
403 void __user *argp = (void __user *)arg;
407 case KVM_INTERRUPT: {
408 struct kvm_interrupt irq;
410 if (copy_from_user(&irq, argp, sizeof(irq)))
412 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
423 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
428 long kvm_arch_vm_ioctl(struct file *filp,
429 unsigned int ioctl, unsigned long arg)
441 int kvm_arch_init(void *opaque)
446 void kvm_arch_exit(void)