eeepc-laptop: Register as a pci-hotplug device
[linux-2.6/linux-acpi-2.6.git] / arch / powerpc / kvm / powerpc.c
blob2cf915e51e7e9e7c7ad6202e0d287187b8a313ed
1 /*
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/fs.h>
27 #include <asm/cputable.h>
28 #include <asm/uaccess.h>
29 #include <asm/kvm_ppc.h>
30 #include <asm/tlbflush.h>
31 #include "timing.h"
32 #include "../mm/mmu_decl.h"
34 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
36 return gfn;
39 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
41 return !!(v->arch.pending_exceptions);
44 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
46 /* do real check here */
47 return 1;
50 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
52 return !(v->arch.msr & MSR_WE);
56 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
58 enum emulation_result er;
59 int r;
61 er = kvmppc_emulate_instruction(run, vcpu);
62 switch (er) {
63 case EMULATE_DONE:
64 /* Future optimization: only reload non-volatiles if they were
65 * actually modified. */
66 r = RESUME_GUEST_NV;
67 break;
68 case EMULATE_DO_MMIO:
69 run->exit_reason = KVM_EXIT_MMIO;
70 /* We must reload nonvolatiles because "update" load/store
71 * instructions modify register state. */
72 /* Future optimization: only reload non-volatiles if they were
73 * actually modified. */
74 r = RESUME_HOST_NV;
75 break;
76 case EMULATE_FAIL:
77 /* XXX Deliver Program interrupt to guest. */
78 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
79 vcpu->arch.last_inst);
80 r = RESUME_HOST;
81 break;
82 default:
83 BUG();
86 return r;
89 void kvm_arch_hardware_enable(void *garbage)
93 void kvm_arch_hardware_disable(void *garbage)
97 int kvm_arch_hardware_setup(void)
99 return 0;
102 void kvm_arch_hardware_unsetup(void)
106 void kvm_arch_check_processor_compat(void *rtn)
108 *(int *)rtn = kvmppc_core_check_processor_compat();
111 struct kvm *kvm_arch_create_vm(void)
113 struct kvm *kvm;
115 kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
116 if (!kvm)
117 return ERR_PTR(-ENOMEM);
119 return kvm;
122 static void kvmppc_free_vcpus(struct kvm *kvm)
124 unsigned int i;
126 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
127 if (kvm->vcpus[i]) {
128 kvm_arch_vcpu_free(kvm->vcpus[i]);
129 kvm->vcpus[i] = NULL;
134 void kvm_arch_sync_events(struct kvm *kvm)
138 void kvm_arch_destroy_vm(struct kvm *kvm)
140 kvmppc_free_vcpus(kvm);
141 kvm_free_physmem(kvm);
142 kfree(kvm);
145 int kvm_dev_ioctl_check_extension(long ext)
147 int r;
149 switch (ext) {
150 case KVM_CAP_COALESCED_MMIO:
151 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
152 break;
153 default:
154 r = 0;
155 break;
157 return r;
161 long kvm_arch_dev_ioctl(struct file *filp,
162 unsigned int ioctl, unsigned long arg)
164 return -EINVAL;
167 int kvm_arch_set_memory_region(struct kvm *kvm,
168 struct kvm_userspace_memory_region *mem,
169 struct kvm_memory_slot old,
170 int user_alloc)
172 return 0;
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;
182 vcpu = kvmppc_core_vcpu_create(kvm, id);
183 kvmppc_create_vcpu_debugfs(vcpu, id);
184 return vcpu;
187 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
189 kvmppc_remove_vcpu_debugfs(vcpu);
190 kvmppc_core_vcpu_free(vcpu);
193 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
195 kvm_arch_vcpu_free(vcpu);
198 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
200 return kvmppc_core_pending_dec(vcpu);
203 static void kvmppc_decrementer_func(unsigned long data)
205 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
207 kvmppc_core_queue_dec(vcpu);
209 if (waitqueue_active(&vcpu->wq)) {
210 wake_up_interruptible(&vcpu->wq);
211 vcpu->stat.halt_wakeup++;
215 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
217 setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
218 (unsigned long)vcpu);
220 return 0;
223 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
225 kvmppc_mmu_destroy(vcpu);
228 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
230 kvmppc_core_vcpu_load(vcpu, cpu);
233 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
235 kvmppc_core_vcpu_put(vcpu);
238 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
239 struct kvm_guest_debug *dbg)
241 return -EINVAL;
244 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
245 struct kvm_run *run)
247 ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
248 *gpr = run->dcr.data;
251 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
252 struct kvm_run *run)
254 ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
256 if (run->mmio.len > sizeof(*gpr)) {
257 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
258 return;
261 if (vcpu->arch.mmio_is_bigendian) {
262 switch (run->mmio.len) {
263 case 4: *gpr = *(u32 *)run->mmio.data; break;
264 case 2: *gpr = *(u16 *)run->mmio.data; break;
265 case 1: *gpr = *(u8 *)run->mmio.data; break;
267 } else {
268 /* Convert BE data from userland back to LE. */
269 switch (run->mmio.len) {
270 case 4: *gpr = ld_le32((u32 *)run->mmio.data); break;
271 case 2: *gpr = ld_le16((u16 *)run->mmio.data); break;
272 case 1: *gpr = *(u8 *)run->mmio.data; break;
277 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
278 unsigned int rt, unsigned int bytes, int is_bigendian)
280 if (bytes > sizeof(run->mmio.data)) {
281 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
282 run->mmio.len);
285 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
286 run->mmio.len = bytes;
287 run->mmio.is_write = 0;
289 vcpu->arch.io_gpr = rt;
290 vcpu->arch.mmio_is_bigendian = is_bigendian;
291 vcpu->mmio_needed = 1;
292 vcpu->mmio_is_write = 0;
294 return EMULATE_DO_MMIO;
297 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
298 u32 val, unsigned int bytes, int is_bigendian)
300 void *data = run->mmio.data;
302 if (bytes > sizeof(run->mmio.data)) {
303 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
304 run->mmio.len);
307 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
308 run->mmio.len = bytes;
309 run->mmio.is_write = 1;
310 vcpu->mmio_needed = 1;
311 vcpu->mmio_is_write = 1;
313 /* Store the value at the lowest bytes in 'data'. */
314 if (is_bigendian) {
315 switch (bytes) {
316 case 4: *(u32 *)data = val; break;
317 case 2: *(u16 *)data = val; break;
318 case 1: *(u8 *)data = val; break;
320 } else {
321 /* Store LE value into 'data'. */
322 switch (bytes) {
323 case 4: st_le32(data, val); break;
324 case 2: st_le16(data, val); break;
325 case 1: *(u8 *)data = val; break;
329 return EMULATE_DO_MMIO;
332 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
334 int r;
335 sigset_t sigsaved;
337 vcpu_load(vcpu);
339 if (vcpu->sigset_active)
340 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
342 if (vcpu->mmio_needed) {
343 if (!vcpu->mmio_is_write)
344 kvmppc_complete_mmio_load(vcpu, run);
345 vcpu->mmio_needed = 0;
346 } else if (vcpu->arch.dcr_needed) {
347 if (!vcpu->arch.dcr_is_write)
348 kvmppc_complete_dcr_load(vcpu, run);
349 vcpu->arch.dcr_needed = 0;
352 kvmppc_core_deliver_interrupts(vcpu);
354 local_irq_disable();
355 kvm_guest_enter();
356 r = __kvmppc_vcpu_run(run, vcpu);
357 kvm_guest_exit();
358 local_irq_enable();
360 if (vcpu->sigset_active)
361 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
363 vcpu_put(vcpu);
365 return r;
368 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
370 kvmppc_core_queue_external(vcpu, irq);
372 if (waitqueue_active(&vcpu->wq)) {
373 wake_up_interruptible(&vcpu->wq);
374 vcpu->stat.halt_wakeup++;
377 return 0;
380 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
381 struct kvm_mp_state *mp_state)
383 return -EINVAL;
386 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
387 struct kvm_mp_state *mp_state)
389 return -EINVAL;
392 long kvm_arch_vcpu_ioctl(struct file *filp,
393 unsigned int ioctl, unsigned long arg)
395 struct kvm_vcpu *vcpu = filp->private_data;
396 void __user *argp = (void __user *)arg;
397 long r;
399 switch (ioctl) {
400 case KVM_INTERRUPT: {
401 struct kvm_interrupt irq;
402 r = -EFAULT;
403 if (copy_from_user(&irq, argp, sizeof(irq)))
404 goto out;
405 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
406 break;
408 default:
409 r = -EINVAL;
412 out:
413 return r;
416 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
418 return -ENOTSUPP;
421 long kvm_arch_vm_ioctl(struct file *filp,
422 unsigned int ioctl, unsigned long arg)
424 long r;
426 switch (ioctl) {
427 default:
428 r = -EINVAL;
431 return r;
434 int kvm_arch_init(void *opaque)
436 return 0;
439 void kvm_arch_exit(void)