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>
32 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
37 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
39 return !!(v->arch.pending_exceptions);
42 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
44 return !(v->arch.msr & MSR_WE);
48 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
50 enum emulation_result er;
53 er = kvmppc_emulate_instruction(run, vcpu);
56 /* Future optimization: only reload non-volatiles if they were
57 * actually modified. */
61 run->exit_reason = KVM_EXIT_MMIO;
62 /* We must reload nonvolatiles because "update" load/store
63 * instructions modify register state. */
64 /* Future optimization: only reload non-volatiles if they were
65 * actually modified. */
69 /* XXX Deliver Program interrupt to guest. */
70 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
71 vcpu->arch.last_inst);
81 void kvm_arch_hardware_enable(void *garbage)
85 void kvm_arch_hardware_disable(void *garbage)
89 int kvm_arch_hardware_setup(void)
94 void kvm_arch_hardware_unsetup(void)
98 void kvm_arch_check_processor_compat(void *rtn)
102 if (strcmp(cur_cpu_spec->platform, "ppc440") == 0)
110 struct kvm *kvm_arch_create_vm(void)
114 kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
116 return ERR_PTR(-ENOMEM);
121 static void kvmppc_free_vcpus(struct kvm *kvm)
125 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
127 kvm_arch_vcpu_free(kvm->vcpus[i]);
128 kvm->vcpus[i] = NULL;
133 void kvm_arch_destroy_vm(struct kvm *kvm)
135 kvmppc_free_vcpus(kvm);
136 kvm_free_physmem(kvm);
140 int kvm_dev_ioctl_check_extension(long ext)
145 case KVM_CAP_USER_MEMORY:
148 case KVM_CAP_COALESCED_MMIO:
149 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
159 long kvm_arch_dev_ioctl(struct file *filp,
160 unsigned int ioctl, unsigned long arg)
165 int kvm_arch_set_memory_region(struct kvm *kvm,
166 struct kvm_userspace_memory_region *mem,
167 struct kvm_memory_slot old,
173 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
175 struct kvm_vcpu *vcpu;
178 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
184 err = kvm_vcpu_init(vcpu, kvm, id);
191 kmem_cache_free(kvm_vcpu_cache, vcpu);
196 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
198 kvm_vcpu_uninit(vcpu);
199 kmem_cache_free(kvm_vcpu_cache, vcpu);
202 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
204 kvm_arch_vcpu_free(vcpu);
207 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
209 unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER];
211 return test_bit(priority, &vcpu->arch.pending_exceptions);
214 static void kvmppc_decrementer_func(unsigned long data)
216 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
218 kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER);
220 if (waitqueue_active(&vcpu->wq)) {
221 wake_up_interruptible(&vcpu->wq);
222 vcpu->stat.halt_wakeup++;
226 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
228 setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
229 (unsigned long)vcpu);
234 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
238 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
242 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
246 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
247 struct kvm_debug_guest *dbg)
252 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
255 u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
256 *gpr = run->dcr.data;
259 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
262 u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
264 if (run->mmio.len > sizeof(*gpr)) {
265 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
269 if (vcpu->arch.mmio_is_bigendian) {
270 switch (run->mmio.len) {
271 case 4: *gpr = *(u32 *)run->mmio.data; break;
272 case 2: *gpr = *(u16 *)run->mmio.data; break;
273 case 1: *gpr = *(u8 *)run->mmio.data; break;
276 /* Convert BE data from userland back to LE. */
277 switch (run->mmio.len) {
278 case 4: *gpr = ld_le32((u32 *)run->mmio.data); break;
279 case 2: *gpr = ld_le16((u16 *)run->mmio.data); break;
280 case 1: *gpr = *(u8 *)run->mmio.data; break;
285 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
286 unsigned int rt, unsigned int bytes, int is_bigendian)
288 if (bytes > sizeof(run->mmio.data)) {
289 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
293 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
294 run->mmio.len = bytes;
295 run->mmio.is_write = 0;
297 vcpu->arch.io_gpr = rt;
298 vcpu->arch.mmio_is_bigendian = is_bigendian;
299 vcpu->mmio_needed = 1;
300 vcpu->mmio_is_write = 0;
302 return EMULATE_DO_MMIO;
305 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
306 u32 val, unsigned int bytes, int is_bigendian)
308 void *data = run->mmio.data;
310 if (bytes > sizeof(run->mmio.data)) {
311 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
315 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
316 run->mmio.len = bytes;
317 run->mmio.is_write = 1;
318 vcpu->mmio_needed = 1;
319 vcpu->mmio_is_write = 1;
321 /* Store the value at the lowest bytes in 'data'. */
324 case 4: *(u32 *)data = val; break;
325 case 2: *(u16 *)data = val; break;
326 case 1: *(u8 *)data = val; break;
329 /* Store LE value into 'data'. */
331 case 4: st_le32(data, val); break;
332 case 2: st_le16(data, val); break;
333 case 1: *(u8 *)data = val; break;
337 return EMULATE_DO_MMIO;
340 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
347 if (vcpu->sigset_active)
348 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
350 if (vcpu->mmio_needed) {
351 if (!vcpu->mmio_is_write)
352 kvmppc_complete_mmio_load(vcpu, run);
353 vcpu->mmio_needed = 0;
354 } else if (vcpu->arch.dcr_needed) {
355 if (!vcpu->arch.dcr_is_write)
356 kvmppc_complete_dcr_load(vcpu, run);
357 vcpu->arch.dcr_needed = 0;
360 kvmppc_check_and_deliver_interrupts(vcpu);
364 r = __kvmppc_vcpu_run(run, vcpu);
368 if (vcpu->sigset_active)
369 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
376 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
378 kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL);
380 if (waitqueue_active(&vcpu->wq)) {
381 wake_up_interruptible(&vcpu->wq);
382 vcpu->stat.halt_wakeup++;
388 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
389 struct kvm_mp_state *mp_state)
394 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
395 struct kvm_mp_state *mp_state)
400 long kvm_arch_vcpu_ioctl(struct file *filp,
401 unsigned int ioctl, unsigned long arg)
403 struct kvm_vcpu *vcpu = filp->private_data;
404 void __user *argp = (void __user *)arg;
408 case KVM_INTERRUPT: {
409 struct kvm_interrupt irq;
411 if (copy_from_user(&irq, argp, sizeof(irq)))
413 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
424 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
429 long kvm_arch_vm_ioctl(struct file *filp,
430 unsigned int ioctl, unsigned long arg)
442 int kvm_arch_init(void *opaque)
447 void kvm_arch_exit(void)