Root/arch/ia64/kvm/kvm-ia64.c

1/*
2 * kvm_ia64.c: Basic KVM suppport On Itanium series processors
3 *
4 *
5 * Copyright (C) 2007, Intel Corporation.
6 * Xiantao Zhang (xiantao.zhang@intel.com)
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
19 * Place - Suite 330, Boston, MA 02111-1307 USA.
20 *
21 */
22
23#include <linux/module.h>
24#include <linux/errno.h>
25#include <linux/percpu.h>
26#include <linux/fs.h>
27#include <linux/slab.h>
28#include <linux/smp.h>
29#include <linux/kvm_host.h>
30#include <linux/kvm.h>
31#include <linux/bitops.h>
32#include <linux/hrtimer.h>
33#include <linux/uaccess.h>
34#include <linux/iommu.h>
35#include <linux/intel-iommu.h>
36
37#include <asm/pgtable.h>
38#include <asm/gcc_intrin.h>
39#include <asm/pal.h>
40#include <asm/cacheflush.h>
41#include <asm/div64.h>
42#include <asm/tlb.h>
43#include <asm/elf.h>
44#include <asm/sn/addrs.h>
45#include <asm/sn/clksupport.h>
46#include <asm/sn/shub_mmr.h>
47
48#include "misc.h"
49#include "vti.h"
50#include "iodev.h"
51#include "ioapic.h"
52#include "lapic.h"
53#include "irq.h"
54
55static unsigned long kvm_vmm_base;
56static unsigned long kvm_vsa_base;
57static unsigned long kvm_vm_buffer;
58static unsigned long kvm_vm_buffer_size;
59unsigned long kvm_vmm_gp;
60
61static long vp_env_info;
62
63static struct kvm_vmm_info *kvm_vmm_info;
64
65static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
66
67struct kvm_stats_debugfs_item debugfs_entries[] = {
68    { NULL }
69};
70
71static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
72{
73#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
74    if (vcpu->kvm->arch.is_sn2)
75        return rtc_time();
76    else
77#endif
78        return ia64_getreg(_IA64_REG_AR_ITC);
79}
80
81static void kvm_flush_icache(unsigned long start, unsigned long len)
82{
83    int l;
84
85    for (l = 0; l < (len + 32); l += 32)
86        ia64_fc((void *)(start + l));
87
88    ia64_sync_i();
89    ia64_srlz_i();
90}
91
92static void kvm_flush_tlb_all(void)
93{
94    unsigned long i, j, count0, count1, stride0, stride1, addr;
95    long flags;
96
97    addr = local_cpu_data->ptce_base;
98    count0 = local_cpu_data->ptce_count[0];
99    count1 = local_cpu_data->ptce_count[1];
100    stride0 = local_cpu_data->ptce_stride[0];
101    stride1 = local_cpu_data->ptce_stride[1];
102
103    local_irq_save(flags);
104    for (i = 0; i < count0; ++i) {
105        for (j = 0; j < count1; ++j) {
106            ia64_ptce(addr);
107            addr += stride1;
108        }
109        addr += stride0;
110    }
111    local_irq_restore(flags);
112    ia64_srlz_i(); /* srlz.i implies srlz.d */
113}
114
115long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
116{
117    struct ia64_pal_retval iprv;
118
119    PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
120            (u64)opt_handler);
121
122    return iprv.status;
123}
124
125static DEFINE_SPINLOCK(vp_lock);
126
127int kvm_arch_hardware_enable(void *garbage)
128{
129    long status;
130    long tmp_base;
131    unsigned long pte;
132    unsigned long saved_psr;
133    int slot;
134
135    pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
136    local_irq_save(saved_psr);
137    slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
138    local_irq_restore(saved_psr);
139    if (slot < 0)
140        return -EINVAL;
141
142    spin_lock(&vp_lock);
143    status = ia64_pal_vp_init_env(kvm_vsa_base ?
144                VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
145            __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
146    if (status != 0) {
147        spin_unlock(&vp_lock);
148        printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
149        return -EINVAL;
150    }
151
152    if (!kvm_vsa_base) {
153        kvm_vsa_base = tmp_base;
154        printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
155    }
156    spin_unlock(&vp_lock);
157    ia64_ptr_entry(0x3, slot);
158
159    return 0;
160}
161
162void kvm_arch_hardware_disable(void *garbage)
163{
164
165    long status;
166    int slot;
167    unsigned long pte;
168    unsigned long saved_psr;
169    unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
170
171    pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
172                PAGE_KERNEL));
173
174    local_irq_save(saved_psr);
175    slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
176    local_irq_restore(saved_psr);
177    if (slot < 0)
178        return;
179
180    status = ia64_pal_vp_exit_env(host_iva);
181    if (status)
182        printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
183                status);
184    ia64_ptr_entry(0x3, slot);
185}
186
187void kvm_arch_check_processor_compat(void *rtn)
188{
189    *(int *)rtn = 0;
190}
191
192int kvm_dev_ioctl_check_extension(long ext)
193{
194
195    int r;
196
197    switch (ext) {
198    case KVM_CAP_IRQCHIP:
199    case KVM_CAP_MP_STATE:
200    case KVM_CAP_IRQ_INJECT_STATUS:
201        r = 1;
202        break;
203    case KVM_CAP_COALESCED_MMIO:
204        r = KVM_COALESCED_MMIO_PAGE_OFFSET;
205        break;
206    case KVM_CAP_IOMMU:
207        r = iommu_found();
208        break;
209    default:
210        r = 0;
211    }
212    return r;
213
214}
215
216static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
217{
218    kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
219    kvm_run->hw.hardware_exit_reason = 1;
220    return 0;
221}
222
223static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
224{
225    struct kvm_mmio_req *p;
226    struct kvm_io_device *mmio_dev;
227    int r;
228
229    p = kvm_get_vcpu_ioreq(vcpu);
230
231    if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
232        goto mmio;
233    vcpu->mmio_needed = 1;
234    vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
235    vcpu->mmio_size = kvm_run->mmio.len = p->size;
236    vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
237
238    if (vcpu->mmio_is_write)
239        memcpy(vcpu->mmio_data, &p->data, p->size);
240    memcpy(kvm_run->mmio.data, &p->data, p->size);
241    kvm_run->exit_reason = KVM_EXIT_MMIO;
242    return 0;
243mmio:
244    if (p->dir)
245        r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
246                    p->size, &p->data);
247    else
248        r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
249                     p->size, &p->data);
250    if (r)
251        printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
252    p->state = STATE_IORESP_READY;
253
254    return 1;
255}
256
257static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
258{
259    struct exit_ctl_data *p;
260
261    p = kvm_get_exit_data(vcpu);
262
263    if (p->exit_reason == EXIT_REASON_PAL_CALL)
264        return kvm_pal_emul(vcpu, kvm_run);
265    else {
266        kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
267        kvm_run->hw.hardware_exit_reason = 2;
268        return 0;
269    }
270}
271
272static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
273{
274    struct exit_ctl_data *p;
275
276    p = kvm_get_exit_data(vcpu);
277
278    if (p->exit_reason == EXIT_REASON_SAL_CALL) {
279        kvm_sal_emul(vcpu);
280        return 1;
281    } else {
282        kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
283        kvm_run->hw.hardware_exit_reason = 3;
284        return 0;
285    }
286
287}
288
289static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
290{
291    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
292
293    if (!test_and_set_bit(vector, &vpd->irr[0])) {
294        vcpu->arch.irq_new_pending = 1;
295        kvm_vcpu_kick(vcpu);
296        return 1;
297    }
298    return 0;
299}
300
301/*
302 * offset: address offset to IPI space.
303 * value: deliver value.
304 */
305static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
306                uint64_t vector)
307{
308    switch (dm) {
309    case SAPIC_FIXED:
310        break;
311    case SAPIC_NMI:
312        vector = 2;
313        break;
314    case SAPIC_EXTINT:
315        vector = 0;
316        break;
317    case SAPIC_INIT:
318    case SAPIC_PMI:
319    default:
320        printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
321        return;
322    }
323    __apic_accept_irq(vcpu, vector);
324}
325
326static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
327            unsigned long eid)
328{
329    union ia64_lid lid;
330    int i;
331    struct kvm_vcpu *vcpu;
332
333    kvm_for_each_vcpu(i, vcpu, kvm) {
334        lid.val = VCPU_LID(vcpu);
335        if (lid.id == id && lid.eid == eid)
336            return vcpu;
337    }
338
339    return NULL;
340}
341
342static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
343{
344    struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
345    struct kvm_vcpu *target_vcpu;
346    struct kvm_pt_regs *regs;
347    union ia64_ipi_a addr = p->u.ipi_data.addr;
348    union ia64_ipi_d data = p->u.ipi_data.data;
349
350    target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
351    if (!target_vcpu)
352        return handle_vm_error(vcpu, kvm_run);
353
354    if (!target_vcpu->arch.launched) {
355        regs = vcpu_regs(target_vcpu);
356
357        regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
358        regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
359
360        target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
361        if (waitqueue_active(&target_vcpu->wq))
362            wake_up_interruptible(&target_vcpu->wq);
363    } else {
364        vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
365        if (target_vcpu != vcpu)
366            kvm_vcpu_kick(target_vcpu);
367    }
368
369    return 1;
370}
371
372struct call_data {
373    struct kvm_ptc_g ptc_g_data;
374    struct kvm_vcpu *vcpu;
375};
376
377static void vcpu_global_purge(void *info)
378{
379    struct call_data *p = (struct call_data *)info;
380    struct kvm_vcpu *vcpu = p->vcpu;
381
382    if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
383        return;
384
385    set_bit(KVM_REQ_PTC_G, &vcpu->requests);
386    if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
387        vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
388                            p->ptc_g_data;
389    } else {
390        clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
391        vcpu->arch.ptc_g_count = 0;
392        set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
393    }
394}
395
396static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
397{
398    struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
399    struct kvm *kvm = vcpu->kvm;
400    struct call_data call_data;
401    int i;
402    struct kvm_vcpu *vcpui;
403
404    call_data.ptc_g_data = p->u.ptc_g_data;
405
406    kvm_for_each_vcpu(i, vcpui, kvm) {
407        if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
408                vcpu == vcpui)
409            continue;
410
411        if (waitqueue_active(&vcpui->wq))
412            wake_up_interruptible(&vcpui->wq);
413
414        if (vcpui->cpu != -1) {
415            call_data.vcpu = vcpui;
416            smp_call_function_single(vcpui->cpu,
417                    vcpu_global_purge, &call_data, 1);
418        } else
419            printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
420
421    }
422    return 1;
423}
424
425static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
426{
427    return 1;
428}
429
430static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
431{
432    unsigned long pte, rtc_phys_addr, map_addr;
433    int slot;
434
435    map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
436    rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
437    pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
438    slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
439    vcpu->arch.sn_rtc_tr_slot = slot;
440    if (slot < 0) {
441        printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
442        slot = 0;
443    }
444    return slot;
445}
446
447int kvm_emulate_halt(struct kvm_vcpu *vcpu)
448{
449
450    ktime_t kt;
451    long itc_diff;
452    unsigned long vcpu_now_itc;
453    unsigned long expires;
454    struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
455    unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
456    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
457
458    if (irqchip_in_kernel(vcpu->kvm)) {
459
460        vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
461
462        if (time_after(vcpu_now_itc, vpd->itm)) {
463            vcpu->arch.timer_check = 1;
464            return 1;
465        }
466        itc_diff = vpd->itm - vcpu_now_itc;
467        if (itc_diff < 0)
468            itc_diff = -itc_diff;
469
470        expires = div64_u64(itc_diff, cyc_per_usec);
471        kt = ktime_set(0, 1000 * expires);
472
473        vcpu->arch.ht_active = 1;
474        hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
475
476        vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
477        kvm_vcpu_block(vcpu);
478        hrtimer_cancel(p_ht);
479        vcpu->arch.ht_active = 0;
480
481        if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
482                kvm_cpu_has_pending_timer(vcpu))
483            if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
484                vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
485
486        if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
487            return -EINTR;
488        return 1;
489    } else {
490        printk(KERN_ERR"kvm: Unsupported userspace halt!");
491        return 0;
492    }
493}
494
495static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
496        struct kvm_run *kvm_run)
497{
498    kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
499    return 0;
500}
501
502static int handle_external_interrupt(struct kvm_vcpu *vcpu,
503        struct kvm_run *kvm_run)
504{
505    return 1;
506}
507
508static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
509                struct kvm_run *kvm_run)
510{
511    printk("VMM: %s", vcpu->arch.log_buf);
512    return 1;
513}
514
515static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
516        struct kvm_run *kvm_run) = {
517    [EXIT_REASON_VM_PANIC] = handle_vm_error,
518    [EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio,
519    [EXIT_REASON_PAL_CALL] = handle_pal_call,
520    [EXIT_REASON_SAL_CALL] = handle_sal_call,
521    [EXIT_REASON_SWITCH_RR6] = handle_switch_rr6,
522    [EXIT_REASON_VM_DESTROY] = handle_vm_shutdown,
523    [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
524    [EXIT_REASON_IPI] = handle_ipi,
525    [EXIT_REASON_PTC_G] = handle_global_purge,
526    [EXIT_REASON_DEBUG] = handle_vcpu_debug,
527
528};
529
530static const int kvm_vti_max_exit_handlers =
531        sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
532
533static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
534{
535    struct exit_ctl_data *p_exit_data;
536
537    p_exit_data = kvm_get_exit_data(vcpu);
538    return p_exit_data->exit_reason;
539}
540
541/*
542 * The guest has exited. See if we can fix it or if we need userspace
543 * assistance.
544 */
545static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
546{
547    u32 exit_reason = kvm_get_exit_reason(vcpu);
548    vcpu->arch.last_exit = exit_reason;
549
550    if (exit_reason < kvm_vti_max_exit_handlers
551            && kvm_vti_exit_handlers[exit_reason])
552        return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
553    else {
554        kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
555        kvm_run->hw.hardware_exit_reason = exit_reason;
556    }
557    return 0;
558}
559
560static inline void vti_set_rr6(unsigned long rr6)
561{
562    ia64_set_rr(RR6, rr6);
563    ia64_srlz_i();
564}
565
566static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
567{
568    unsigned long pte;
569    struct kvm *kvm = vcpu->kvm;
570    int r;
571
572    /*Insert a pair of tr to map vmm*/
573    pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
574    r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
575    if (r < 0)
576        goto out;
577    vcpu->arch.vmm_tr_slot = r;
578    /*Insert a pairt of tr to map data of vm*/
579    pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
580    r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
581                    pte, KVM_VM_DATA_SHIFT);
582    if (r < 0)
583        goto out;
584    vcpu->arch.vm_tr_slot = r;
585
586#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
587    if (kvm->arch.is_sn2) {
588        r = kvm_sn2_setup_mappings(vcpu);
589        if (r < 0)
590            goto out;
591    }
592#endif
593
594    r = 0;
595out:
596    return r;
597}
598
599static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
600{
601    struct kvm *kvm = vcpu->kvm;
602    ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
603    ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
604#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
605    if (kvm->arch.is_sn2)
606        ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
607#endif
608}
609
610static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
611{
612    unsigned long psr;
613    int r;
614    int cpu = smp_processor_id();
615
616    if (vcpu->arch.last_run_cpu != cpu ||
617            per_cpu(last_vcpu, cpu) != vcpu) {
618        per_cpu(last_vcpu, cpu) = vcpu;
619        vcpu->arch.last_run_cpu = cpu;
620        kvm_flush_tlb_all();
621    }
622
623    vcpu->arch.host_rr6 = ia64_get_rr(RR6);
624    vti_set_rr6(vcpu->arch.vmm_rr);
625    local_irq_save(psr);
626    r = kvm_insert_vmm_mapping(vcpu);
627    local_irq_restore(psr);
628    return r;
629}
630
631static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
632{
633    kvm_purge_vmm_mapping(vcpu);
634    vti_set_rr6(vcpu->arch.host_rr6);
635}
636
637static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
638{
639    union context *host_ctx, *guest_ctx;
640    int r, idx;
641
642    idx = srcu_read_lock(&vcpu->kvm->srcu);
643
644again:
645    if (signal_pending(current)) {
646        r = -EINTR;
647        kvm_run->exit_reason = KVM_EXIT_INTR;
648        goto out;
649    }
650
651    preempt_disable();
652    local_irq_disable();
653
654    /*Get host and guest context with guest address space.*/
655    host_ctx = kvm_get_host_context(vcpu);
656    guest_ctx = kvm_get_guest_context(vcpu);
657
658    clear_bit(KVM_REQ_KICK, &vcpu->requests);
659
660    r = kvm_vcpu_pre_transition(vcpu);
661    if (r < 0)
662        goto vcpu_run_fail;
663
664    srcu_read_unlock(&vcpu->kvm->srcu, idx);
665    kvm_guest_enter();
666
667    /*
668     * Transition to the guest
669     */
670    kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
671
672    kvm_vcpu_post_transition(vcpu);
673
674    vcpu->arch.launched = 1;
675    set_bit(KVM_REQ_KICK, &vcpu->requests);
676    local_irq_enable();
677
678    /*
679     * We must have an instruction between local_irq_enable() and
680     * kvm_guest_exit(), so the timer interrupt isn't delayed by
681     * the interrupt shadow. The stat.exits increment will do nicely.
682     * But we need to prevent reordering, hence this barrier():
683     */
684    barrier();
685    kvm_guest_exit();
686    preempt_enable();
687
688    idx = srcu_read_lock(&vcpu->kvm->srcu);
689
690    r = kvm_handle_exit(kvm_run, vcpu);
691
692    if (r > 0) {
693        if (!need_resched())
694            goto again;
695    }
696
697out:
698    srcu_read_unlock(&vcpu->kvm->srcu, idx);
699    if (r > 0) {
700        kvm_resched(vcpu);
701        idx = srcu_read_lock(&vcpu->kvm->srcu);
702        goto again;
703    }
704
705    return r;
706
707vcpu_run_fail:
708    local_irq_enable();
709    preempt_enable();
710    kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
711    goto out;
712}
713
714static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
715{
716    struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
717
718    if (!vcpu->mmio_is_write)
719        memcpy(&p->data, vcpu->mmio_data, 8);
720    p->state = STATE_IORESP_READY;
721}
722
723int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
724{
725    int r;
726    sigset_t sigsaved;
727
728    if (vcpu->sigset_active)
729        sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
730
731    if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
732        kvm_vcpu_block(vcpu);
733        clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
734        r = -EAGAIN;
735        goto out;
736    }
737
738    if (vcpu->mmio_needed) {
739        memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
740        kvm_set_mmio_data(vcpu);
741        vcpu->mmio_read_completed = 1;
742        vcpu->mmio_needed = 0;
743    }
744    r = __vcpu_run(vcpu, kvm_run);
745out:
746    if (vcpu->sigset_active)
747        sigprocmask(SIG_SETMASK, &sigsaved, NULL);
748
749    return r;
750}
751
752static struct kvm *kvm_alloc_kvm(void)
753{
754
755    struct kvm *kvm;
756    uint64_t vm_base;
757
758    BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
759
760    vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
761
762    if (!vm_base)
763        return ERR_PTR(-ENOMEM);
764
765    memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
766    kvm = (struct kvm *)(vm_base +
767            offsetof(struct kvm_vm_data, kvm_vm_struct));
768    kvm->arch.vm_base = vm_base;
769    printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
770
771    return kvm;
772}
773
774struct kvm_io_range {
775    unsigned long start;
776    unsigned long size;
777    unsigned long type;
778};
779
780static const struct kvm_io_range io_ranges[] = {
781    {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
782    {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
783    {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
784    {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
785    {PIB_START, PIB_SIZE, GPFN_PIB},
786};
787
788static void kvm_build_io_pmt(struct kvm *kvm)
789{
790    unsigned long i, j;
791
792    /* Mark I/O ranges */
793    for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
794                            i++) {
795        for (j = io_ranges[i].start;
796                j < io_ranges[i].start + io_ranges[i].size;
797                j += PAGE_SIZE)
798            kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
799                    io_ranges[i].type, 0);
800    }
801
802}
803
804/*Use unused rids to virtualize guest rid.*/
805#define GUEST_PHYSICAL_RR0 0x1739
806#define GUEST_PHYSICAL_RR4 0x2739
807#define VMM_INIT_RR 0x1660
808
809static void kvm_init_vm(struct kvm *kvm)
810{
811    BUG_ON(!kvm);
812
813    kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
814    kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
815    kvm->arch.vmm_init_rr = VMM_INIT_RR;
816
817    /*
818     *Fill P2M entries for MMIO/IO ranges
819     */
820    kvm_build_io_pmt(kvm);
821
822    INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
823
824    /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
825    set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
826}
827
828struct kvm *kvm_arch_create_vm(void)
829{
830    struct kvm *kvm = kvm_alloc_kvm();
831
832    if (IS_ERR(kvm))
833        return ERR_PTR(-ENOMEM);
834
835    kvm->arch.is_sn2 = ia64_platform_is("sn2");
836
837    kvm_init_vm(kvm);
838
839    return kvm;
840
841}
842
843static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
844                    struct kvm_irqchip *chip)
845{
846    int r;
847
848    r = 0;
849    switch (chip->chip_id) {
850    case KVM_IRQCHIP_IOAPIC:
851        r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
852        break;
853    default:
854        r = -EINVAL;
855        break;
856    }
857    return r;
858}
859
860static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
861{
862    int r;
863
864    r = 0;
865    switch (chip->chip_id) {
866    case KVM_IRQCHIP_IOAPIC:
867        r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
868        break;
869    default:
870        r = -EINVAL;
871        break;
872    }
873    return r;
874}
875
876#define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
877
878int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
879{
880    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
881    int i;
882
883    for (i = 0; i < 16; i++) {
884        vpd->vgr[i] = regs->vpd.vgr[i];
885        vpd->vbgr[i] = regs->vpd.vbgr[i];
886    }
887    for (i = 0; i < 128; i++)
888        vpd->vcr[i] = regs->vpd.vcr[i];
889    vpd->vhpi = regs->vpd.vhpi;
890    vpd->vnat = regs->vpd.vnat;
891    vpd->vbnat = regs->vpd.vbnat;
892    vpd->vpsr = regs->vpd.vpsr;
893
894    vpd->vpr = regs->vpd.vpr;
895
896    memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
897
898    RESTORE_REGS(mp_state);
899    RESTORE_REGS(vmm_rr);
900    memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
901    memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
902    RESTORE_REGS(itr_regions);
903    RESTORE_REGS(dtr_regions);
904    RESTORE_REGS(tc_regions);
905    RESTORE_REGS(irq_check);
906    RESTORE_REGS(itc_check);
907    RESTORE_REGS(timer_check);
908    RESTORE_REGS(timer_pending);
909    RESTORE_REGS(last_itc);
910    for (i = 0; i < 8; i++) {
911        vcpu->arch.vrr[i] = regs->vrr[i];
912        vcpu->arch.ibr[i] = regs->ibr[i];
913        vcpu->arch.dbr[i] = regs->dbr[i];
914    }
915    for (i = 0; i < 4; i++)
916        vcpu->arch.insvc[i] = regs->insvc[i];
917    RESTORE_REGS(xtp);
918    RESTORE_REGS(metaphysical_rr0);
919    RESTORE_REGS(metaphysical_rr4);
920    RESTORE_REGS(metaphysical_saved_rr0);
921    RESTORE_REGS(metaphysical_saved_rr4);
922    RESTORE_REGS(fp_psr);
923    RESTORE_REGS(saved_gp);
924
925    vcpu->arch.irq_new_pending = 1;
926    vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
927    set_bit(KVM_REQ_RESUME, &vcpu->requests);
928
929    return 0;
930}
931
932long kvm_arch_vm_ioctl(struct file *filp,
933        unsigned int ioctl, unsigned long arg)
934{
935    struct kvm *kvm = filp->private_data;
936    void __user *argp = (void __user *)arg;
937    int r = -ENOTTY;
938
939    switch (ioctl) {
940    case KVM_SET_MEMORY_REGION: {
941        struct kvm_memory_region kvm_mem;
942        struct kvm_userspace_memory_region kvm_userspace_mem;
943
944        r = -EFAULT;
945        if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
946            goto out;
947        kvm_userspace_mem.slot = kvm_mem.slot;
948        kvm_userspace_mem.flags = kvm_mem.flags;
949        kvm_userspace_mem.guest_phys_addr =
950                    kvm_mem.guest_phys_addr;
951        kvm_userspace_mem.memory_size = kvm_mem.memory_size;
952        r = kvm_vm_ioctl_set_memory_region(kvm,
953                    &kvm_userspace_mem, 0);
954        if (r)
955            goto out;
956        break;
957        }
958    case KVM_CREATE_IRQCHIP:
959        r = -EFAULT;
960        r = kvm_ioapic_init(kvm);
961        if (r)
962            goto out;
963        r = kvm_setup_default_irq_routing(kvm);
964        if (r) {
965            kvm_ioapic_destroy(kvm);
966            goto out;
967        }
968        break;
969    case KVM_IRQ_LINE_STATUS:
970    case KVM_IRQ_LINE: {
971        struct kvm_irq_level irq_event;
972
973        r = -EFAULT;
974        if (copy_from_user(&irq_event, argp, sizeof irq_event))
975            goto out;
976        r = -ENXIO;
977        if (irqchip_in_kernel(kvm)) {
978            __s32 status;
979            status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
980                    irq_event.irq, irq_event.level);
981            if (ioctl == KVM_IRQ_LINE_STATUS) {
982                r = -EFAULT;
983                irq_event.status = status;
984                if (copy_to_user(argp, &irq_event,
985                            sizeof irq_event))
986                    goto out;
987            }
988            r = 0;
989        }
990        break;
991        }
992    case KVM_GET_IRQCHIP: {
993        /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
994        struct kvm_irqchip chip;
995
996        r = -EFAULT;
997        if (copy_from_user(&chip, argp, sizeof chip))
998                goto out;
999        r = -ENXIO;
1000        if (!irqchip_in_kernel(kvm))
1001            goto out;
1002        r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1003        if (r)
1004            goto out;
1005        r = -EFAULT;
1006        if (copy_to_user(argp, &chip, sizeof chip))
1007                goto out;
1008        r = 0;
1009        break;
1010        }
1011    case KVM_SET_IRQCHIP: {
1012        /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1013        struct kvm_irqchip chip;
1014
1015        r = -EFAULT;
1016        if (copy_from_user(&chip, argp, sizeof chip))
1017                goto out;
1018        r = -ENXIO;
1019        if (!irqchip_in_kernel(kvm))
1020            goto out;
1021        r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1022        if (r)
1023            goto out;
1024        r = 0;
1025        break;
1026        }
1027    default:
1028        ;
1029    }
1030out:
1031    return r;
1032}
1033
1034int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1035        struct kvm_sregs *sregs)
1036{
1037    return -EINVAL;
1038}
1039
1040int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1041        struct kvm_sregs *sregs)
1042{
1043    return -EINVAL;
1044
1045}
1046int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1047        struct kvm_translation *tr)
1048{
1049
1050    return -EINVAL;
1051}
1052
1053static int kvm_alloc_vmm_area(void)
1054{
1055    if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1056        kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1057                get_order(KVM_VMM_SIZE));
1058        if (!kvm_vmm_base)
1059            return -ENOMEM;
1060
1061        memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1062        kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1063
1064        printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1065                kvm_vmm_base, kvm_vm_buffer);
1066    }
1067
1068    return 0;
1069}
1070
1071static void kvm_free_vmm_area(void)
1072{
1073    if (kvm_vmm_base) {
1074        /*Zero this area before free to avoid bits leak!!*/
1075        memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1076        free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1077        kvm_vmm_base = 0;
1078        kvm_vm_buffer = 0;
1079        kvm_vsa_base = 0;
1080    }
1081}
1082
1083static int vti_init_vpd(struct kvm_vcpu *vcpu)
1084{
1085    int i;
1086    union cpuid3_t cpuid3;
1087    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1088
1089    if (IS_ERR(vpd))
1090        return PTR_ERR(vpd);
1091
1092    /* CPUID init */
1093    for (i = 0; i < 5; i++)
1094        vpd->vcpuid[i] = ia64_get_cpuid(i);
1095
1096    /* Limit the CPUID number to 5 */
1097    cpuid3.value = vpd->vcpuid[3];
1098    cpuid3.number = 4; /* 5 - 1 */
1099    vpd->vcpuid[3] = cpuid3.value;
1100
1101    /*Set vac and vdc fields*/
1102    vpd->vac.a_from_int_cr = 1;
1103    vpd->vac.a_to_int_cr = 1;
1104    vpd->vac.a_from_psr = 1;
1105    vpd->vac.a_from_cpuid = 1;
1106    vpd->vac.a_cover = 1;
1107    vpd->vac.a_bsw = 1;
1108    vpd->vac.a_int = 1;
1109    vpd->vdc.d_vmsw = 1;
1110
1111    /*Set virtual buffer*/
1112    vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1113
1114    return 0;
1115}
1116
1117static int vti_create_vp(struct kvm_vcpu *vcpu)
1118{
1119    long ret;
1120    struct vpd *vpd = vcpu->arch.vpd;
1121    unsigned long vmm_ivt;
1122
1123    vmm_ivt = kvm_vmm_info->vmm_ivt;
1124
1125    printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1126
1127    ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1128
1129    if (ret) {
1130        printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1131        return -EINVAL;
1132    }
1133    return 0;
1134}
1135
1136static void init_ptce_info(struct kvm_vcpu *vcpu)
1137{
1138    ia64_ptce_info_t ptce = {0};
1139
1140    ia64_get_ptce(&ptce);
1141    vcpu->arch.ptce_base = ptce.base;
1142    vcpu->arch.ptce_count[0] = ptce.count[0];
1143    vcpu->arch.ptce_count[1] = ptce.count[1];
1144    vcpu->arch.ptce_stride[0] = ptce.stride[0];
1145    vcpu->arch.ptce_stride[1] = ptce.stride[1];
1146}
1147
1148static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1149{
1150    struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1151
1152    if (hrtimer_cancel(p_ht))
1153        hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1154}
1155
1156static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1157{
1158    struct kvm_vcpu *vcpu;
1159    wait_queue_head_t *q;
1160
1161    vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1162    q = &vcpu->wq;
1163
1164    if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1165        goto out;
1166
1167    if (waitqueue_active(q))
1168        wake_up_interruptible(q);
1169
1170out:
1171    vcpu->arch.timer_fired = 1;
1172    vcpu->arch.timer_check = 1;
1173    return HRTIMER_NORESTART;
1174}
1175
1176#define PALE_RESET_ENTRY 0x80000000ffffffb0UL
1177
1178int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1179{
1180    struct kvm_vcpu *v;
1181    int r;
1182    int i;
1183    long itc_offset;
1184    struct kvm *kvm = vcpu->kvm;
1185    struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1186
1187    union context *p_ctx = &vcpu->arch.guest;
1188    struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1189
1190    /*Init vcpu context for first run.*/
1191    if (IS_ERR(vmm_vcpu))
1192        return PTR_ERR(vmm_vcpu);
1193
1194    if (kvm_vcpu_is_bsp(vcpu)) {
1195        vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1196
1197        /*Set entry address for first run.*/
1198        regs->cr_iip = PALE_RESET_ENTRY;
1199
1200        /*Initialize itc offset for vcpus*/
1201        itc_offset = 0UL - kvm_get_itc(vcpu);
1202        for (i = 0; i < KVM_MAX_VCPUS; i++) {
1203            v = (struct kvm_vcpu *)((char *)vcpu +
1204                    sizeof(struct kvm_vcpu_data) * i);
1205            v->arch.itc_offset = itc_offset;
1206            v->arch.last_itc = 0;
1207        }
1208    } else
1209        vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1210
1211    r = -ENOMEM;
1212    vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1213    if (!vcpu->arch.apic)
1214        goto out;
1215    vcpu->arch.apic->vcpu = vcpu;
1216
1217    p_ctx->gr[1] = 0;
1218    p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1219    p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1220    p_ctx->psr = 0x1008522000UL;
1221    p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1222    p_ctx->caller_unat = 0;
1223    p_ctx->pr = 0x0;
1224    p_ctx->ar[36] = 0x0; /*unat*/
1225    p_ctx->ar[19] = 0x0; /*rnat*/
1226    p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1227                ((sizeof(struct kvm_vcpu)+15) & ~15);
1228    p_ctx->ar[64] = 0x0; /*pfs*/
1229    p_ctx->cr[0] = 0x7e04UL;
1230    p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1231    p_ctx->cr[8] = 0x3c;
1232
1233    /*Initialize region register*/
1234    p_ctx->rr[0] = 0x30;
1235    p_ctx->rr[1] = 0x30;
1236    p_ctx->rr[2] = 0x30;
1237    p_ctx->rr[3] = 0x30;
1238    p_ctx->rr[4] = 0x30;
1239    p_ctx->rr[5] = 0x30;
1240    p_ctx->rr[7] = 0x30;
1241
1242    /*Initialize branch register 0*/
1243    p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1244
1245    vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1246    vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1247    vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1248
1249    hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1250    vcpu->arch.hlt_timer.function = hlt_timer_fn;
1251
1252    vcpu->arch.last_run_cpu = -1;
1253    vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1254    vcpu->arch.vsa_base = kvm_vsa_base;
1255    vcpu->arch.__gp = kvm_vmm_gp;
1256    vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1257    vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1258    vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1259    init_ptce_info(vcpu);
1260
1261    r = 0;
1262out:
1263    return r;
1264}
1265
1266static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1267{
1268    unsigned long psr;
1269    int r;
1270
1271    local_irq_save(psr);
1272    r = kvm_insert_vmm_mapping(vcpu);
1273    local_irq_restore(psr);
1274    if (r)
1275        goto fail;
1276    r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1277    if (r)
1278        goto fail;
1279
1280    r = vti_init_vpd(vcpu);
1281    if (r) {
1282        printk(KERN_DEBUG"kvm: vpd init error!!\n");
1283        goto uninit;
1284    }
1285
1286    r = vti_create_vp(vcpu);
1287    if (r)
1288        goto uninit;
1289
1290    kvm_purge_vmm_mapping(vcpu);
1291
1292    return 0;
1293uninit:
1294    kvm_vcpu_uninit(vcpu);
1295fail:
1296    return r;
1297}
1298
1299struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1300        unsigned int id)
1301{
1302    struct kvm_vcpu *vcpu;
1303    unsigned long vm_base = kvm->arch.vm_base;
1304    int r;
1305    int cpu;
1306
1307    BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1308
1309    r = -EINVAL;
1310    if (id >= KVM_MAX_VCPUS) {
1311        printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1312                KVM_MAX_VCPUS);
1313        goto fail;
1314    }
1315
1316    r = -ENOMEM;
1317    if (!vm_base) {
1318        printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1319        goto fail;
1320    }
1321    vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1322                    vcpu_data[id].vcpu_struct));
1323    vcpu->kvm = kvm;
1324
1325    cpu = get_cpu();
1326    r = vti_vcpu_setup(vcpu, id);
1327    put_cpu();
1328
1329    if (r) {
1330        printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1331        goto fail;
1332    }
1333
1334    return vcpu;
1335fail:
1336    return ERR_PTR(r);
1337}
1338
1339int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1340{
1341    return 0;
1342}
1343
1344int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1345{
1346    return -EINVAL;
1347}
1348
1349int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1350{
1351    return -EINVAL;
1352}
1353
1354int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1355                    struct kvm_guest_debug *dbg)
1356{
1357    return -EINVAL;
1358}
1359
1360static void free_kvm(struct kvm *kvm)
1361{
1362    unsigned long vm_base = kvm->arch.vm_base;
1363
1364    if (vm_base) {
1365        memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1366        free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1367    }
1368
1369}
1370
1371static void kvm_release_vm_pages(struct kvm *kvm)
1372{
1373    struct kvm_memslots *slots;
1374    struct kvm_memory_slot *memslot;
1375    int i, j;
1376    unsigned long base_gfn;
1377
1378    slots = kvm_memslots(kvm);
1379    for (i = 0; i < slots->nmemslots; i++) {
1380        memslot = &slots->memslots[i];
1381        base_gfn = memslot->base_gfn;
1382
1383        for (j = 0; j < memslot->npages; j++) {
1384            if (memslot->rmap[j])
1385                put_page((struct page *)memslot->rmap[j]);
1386        }
1387    }
1388}
1389
1390void kvm_arch_sync_events(struct kvm *kvm)
1391{
1392}
1393
1394void kvm_arch_destroy_vm(struct kvm *kvm)
1395{
1396    kvm_iommu_unmap_guest(kvm);
1397#ifdef KVM_CAP_DEVICE_ASSIGNMENT
1398    kvm_free_all_assigned_devices(kvm);
1399#endif
1400    kfree(kvm->arch.vioapic);
1401    kvm_release_vm_pages(kvm);
1402    kvm_free_physmem(kvm);
1403    cleanup_srcu_struct(&kvm->srcu);
1404    free_kvm(kvm);
1405}
1406
1407void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1408{
1409}
1410
1411void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1412{
1413    if (cpu != vcpu->cpu) {
1414        vcpu->cpu = cpu;
1415        if (vcpu->arch.ht_active)
1416            kvm_migrate_hlt_timer(vcpu);
1417    }
1418}
1419
1420#define SAVE_REGS(_x) regs->_x = vcpu->arch._x
1421
1422int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1423{
1424    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1425    int i;
1426
1427    vcpu_load(vcpu);
1428
1429    for (i = 0; i < 16; i++) {
1430        regs->vpd.vgr[i] = vpd->vgr[i];
1431        regs->vpd.vbgr[i] = vpd->vbgr[i];
1432    }
1433    for (i = 0; i < 128; i++)
1434        regs->vpd.vcr[i] = vpd->vcr[i];
1435    regs->vpd.vhpi = vpd->vhpi;
1436    regs->vpd.vnat = vpd->vnat;
1437    regs->vpd.vbnat = vpd->vbnat;
1438    regs->vpd.vpsr = vpd->vpsr;
1439    regs->vpd.vpr = vpd->vpr;
1440
1441    memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1442
1443    SAVE_REGS(mp_state);
1444    SAVE_REGS(vmm_rr);
1445    memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1446    memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1447    SAVE_REGS(itr_regions);
1448    SAVE_REGS(dtr_regions);
1449    SAVE_REGS(tc_regions);
1450    SAVE_REGS(irq_check);
1451    SAVE_REGS(itc_check);
1452    SAVE_REGS(timer_check);
1453    SAVE_REGS(timer_pending);
1454    SAVE_REGS(last_itc);
1455    for (i = 0; i < 8; i++) {
1456        regs->vrr[i] = vcpu->arch.vrr[i];
1457        regs->ibr[i] = vcpu->arch.ibr[i];
1458        regs->dbr[i] = vcpu->arch.dbr[i];
1459    }
1460    for (i = 0; i < 4; i++)
1461        regs->insvc[i] = vcpu->arch.insvc[i];
1462    regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1463    SAVE_REGS(xtp);
1464    SAVE_REGS(metaphysical_rr0);
1465    SAVE_REGS(metaphysical_rr4);
1466    SAVE_REGS(metaphysical_saved_rr0);
1467    SAVE_REGS(metaphysical_saved_rr4);
1468    SAVE_REGS(fp_psr);
1469    SAVE_REGS(saved_gp);
1470
1471    vcpu_put(vcpu);
1472    return 0;
1473}
1474
1475int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1476                  struct kvm_ia64_vcpu_stack *stack)
1477{
1478    memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1479    return 0;
1480}
1481
1482int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1483                  struct kvm_ia64_vcpu_stack *stack)
1484{
1485    memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1486           sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1487
1488    vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1489    return 0;
1490}
1491
1492void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1493{
1494
1495    hrtimer_cancel(&vcpu->arch.hlt_timer);
1496    kfree(vcpu->arch.apic);
1497}
1498
1499
1500long kvm_arch_vcpu_ioctl(struct file *filp,
1501             unsigned int ioctl, unsigned long arg)
1502{
1503    struct kvm_vcpu *vcpu = filp->private_data;
1504    void __user *argp = (void __user *)arg;
1505    struct kvm_ia64_vcpu_stack *stack = NULL;
1506    long r;
1507
1508    switch (ioctl) {
1509    case KVM_IA64_VCPU_GET_STACK: {
1510        struct kvm_ia64_vcpu_stack __user *user_stack;
1511            void __user *first_p = argp;
1512
1513        r = -EFAULT;
1514        if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1515            goto out;
1516
1517        if (!access_ok(VERIFY_WRITE, user_stack,
1518                   sizeof(struct kvm_ia64_vcpu_stack))) {
1519            printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1520                   "Illegal user destination address for stack\n");
1521            goto out;
1522        }
1523        stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1524        if (!stack) {
1525            r = -ENOMEM;
1526            goto out;
1527        }
1528
1529        r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1530        if (r)
1531            goto out;
1532
1533        if (copy_to_user(user_stack, stack,
1534                 sizeof(struct kvm_ia64_vcpu_stack))) {
1535            r = -EFAULT;
1536            goto out;
1537        }
1538
1539        break;
1540    }
1541    case KVM_IA64_VCPU_SET_STACK: {
1542        struct kvm_ia64_vcpu_stack __user *user_stack;
1543            void __user *first_p = argp;
1544
1545        r = -EFAULT;
1546        if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1547            goto out;
1548
1549        if (!access_ok(VERIFY_READ, user_stack,
1550                sizeof(struct kvm_ia64_vcpu_stack))) {
1551            printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1552                   "Illegal user address for stack\n");
1553            goto out;
1554        }
1555        stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1556        if (!stack) {
1557            r = -ENOMEM;
1558            goto out;
1559        }
1560        if (copy_from_user(stack, user_stack,
1561                   sizeof(struct kvm_ia64_vcpu_stack)))
1562            goto out;
1563
1564        r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1565        break;
1566    }
1567
1568    default:
1569        r = -EINVAL;
1570    }
1571
1572out:
1573    kfree(stack);
1574    return r;
1575}
1576
1577int kvm_arch_prepare_memory_region(struct kvm *kvm,
1578        struct kvm_memory_slot *memslot,
1579        struct kvm_memory_slot old,
1580        struct kvm_userspace_memory_region *mem,
1581        int user_alloc)
1582{
1583    unsigned long i;
1584    unsigned long pfn;
1585    int npages = memslot->npages;
1586    unsigned long base_gfn = memslot->base_gfn;
1587
1588    if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1589        return -ENOMEM;
1590
1591    for (i = 0; i < npages; i++) {
1592        pfn = gfn_to_pfn(kvm, base_gfn + i);
1593        if (!kvm_is_mmio_pfn(pfn)) {
1594            kvm_set_pmt_entry(kvm, base_gfn + i,
1595                    pfn << PAGE_SHIFT,
1596                _PAGE_AR_RWX | _PAGE_MA_WB);
1597            memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1598        } else {
1599            kvm_set_pmt_entry(kvm, base_gfn + i,
1600                    GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1601                    _PAGE_MA_UC);
1602            memslot->rmap[i] = 0;
1603            }
1604    }
1605
1606    return 0;
1607}
1608
1609void kvm_arch_commit_memory_region(struct kvm *kvm,
1610        struct kvm_userspace_memory_region *mem,
1611        struct kvm_memory_slot old,
1612        int user_alloc)
1613{
1614    return;
1615}
1616
1617void kvm_arch_flush_shadow(struct kvm *kvm)
1618{
1619    kvm_flush_remote_tlbs(kvm);
1620}
1621
1622long kvm_arch_dev_ioctl(struct file *filp,
1623            unsigned int ioctl, unsigned long arg)
1624{
1625    return -EINVAL;
1626}
1627
1628void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1629{
1630    kvm_vcpu_uninit(vcpu);
1631}
1632
1633static int vti_cpu_has_kvm_support(void)
1634{
1635    long avail = 1, status = 1, control = 1;
1636    long ret;
1637
1638    ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1639    if (ret)
1640        goto out;
1641
1642    if (!(avail & PAL_PROC_VM_BIT))
1643        goto out;
1644
1645    printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1646
1647    ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1648    if (ret)
1649        goto out;
1650    printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1651
1652    if (!(vp_env_info & VP_OPCODE)) {
1653        printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1654                "vm_env_info:0x%lx\n", vp_env_info);
1655    }
1656
1657    return 1;
1658out:
1659    return 0;
1660}
1661
1662
1663/*
1664 * On SN2, the ITC isn't stable, so copy in fast path code to use the
1665 * SN2 RTC, replacing the ITC based default verion.
1666 */
1667static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1668              struct module *module)
1669{
1670    unsigned long new_ar, new_ar_sn2;
1671    unsigned long module_base;
1672
1673    if (!ia64_platform_is("sn2"))
1674        return;
1675
1676    module_base = (unsigned long)module->module_core;
1677
1678    new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1679    new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1680
1681    printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1682           "as source\n");
1683
1684    /*
1685     * Copy the SN2 version of mov_ar into place. They are both
1686     * the same size, so 6 bundles is sufficient (6 * 0x10).
1687     */
1688    memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1689}
1690
1691static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1692                struct module *module)
1693{
1694    unsigned long module_base;
1695    unsigned long vmm_size;
1696
1697    unsigned long vmm_offset, func_offset, fdesc_offset;
1698    struct fdesc *p_fdesc;
1699
1700    BUG_ON(!module);
1701
1702    if (!kvm_vmm_base) {
1703        printk("kvm: kvm area hasn't been initialized yet!!\n");
1704        return -EFAULT;
1705    }
1706
1707    /*Calculate new position of relocated vmm module.*/
1708    module_base = (unsigned long)module->module_core;
1709    vmm_size = module->core_size;
1710    if (unlikely(vmm_size > KVM_VMM_SIZE))
1711        return -EFAULT;
1712
1713    memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1714    kvm_patch_vmm(vmm_info, module);
1715    kvm_flush_icache(kvm_vmm_base, vmm_size);
1716
1717    /*Recalculate kvm_vmm_info based on new VMM*/
1718    vmm_offset = vmm_info->vmm_ivt - module_base;
1719    kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1720    printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1721            kvm_vmm_info->vmm_ivt);
1722
1723    fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1724    kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1725                            fdesc_offset);
1726    func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1727    p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1728    p_fdesc->ip = KVM_VMM_BASE + func_offset;
1729    p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1730
1731    printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1732            KVM_VMM_BASE+func_offset);
1733
1734    fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1735    kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1736            fdesc_offset);
1737    func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1738    p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1739    p_fdesc->ip = KVM_VMM_BASE + func_offset;
1740    p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1741
1742    kvm_vmm_gp = p_fdesc->gp;
1743
1744    printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1745                        kvm_vmm_info->vmm_entry);
1746    printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1747                        KVM_VMM_BASE + func_offset);
1748
1749    return 0;
1750}
1751
1752int kvm_arch_init(void *opaque)
1753{
1754    int r;
1755    struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1756
1757    if (!vti_cpu_has_kvm_support()) {
1758        printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1759        r = -EOPNOTSUPP;
1760        goto out;
1761    }
1762
1763    if (kvm_vmm_info) {
1764        printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1765        r = -EEXIST;
1766        goto out;
1767    }
1768
1769    r = -ENOMEM;
1770    kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1771    if (!kvm_vmm_info)
1772        goto out;
1773
1774    if (kvm_alloc_vmm_area())
1775        goto out_free0;
1776
1777    r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1778    if (r)
1779        goto out_free1;
1780
1781    return 0;
1782
1783out_free1:
1784    kvm_free_vmm_area();
1785out_free0:
1786    kfree(kvm_vmm_info);
1787out:
1788    return r;
1789}
1790
1791void kvm_arch_exit(void)
1792{
1793    kvm_free_vmm_area();
1794    kfree(kvm_vmm_info);
1795    kvm_vmm_info = NULL;
1796}
1797
1798static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
1799                    struct kvm_memory_slot *memslot)
1800{
1801    int i;
1802    long base;
1803    unsigned long n;
1804    unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1805            offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1806
1807    n = kvm_dirty_bitmap_bytes(memslot);
1808    base = memslot->base_gfn / BITS_PER_LONG;
1809
1810    spin_lock(&kvm->arch.dirty_log_lock);
1811    for (i = 0; i < n/sizeof(long); ++i) {
1812        memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1813        dirty_bitmap[base + i] = 0;
1814    }
1815    spin_unlock(&kvm->arch.dirty_log_lock);
1816}
1817
1818int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1819        struct kvm_dirty_log *log)
1820{
1821    int r;
1822    unsigned long n;
1823    struct kvm_memory_slot *memslot;
1824    int is_dirty = 0;
1825
1826    mutex_lock(&kvm->slots_lock);
1827
1828    r = -EINVAL;
1829    if (log->slot >= KVM_MEMORY_SLOTS)
1830        goto out;
1831
1832    memslot = &kvm->memslots->memslots[log->slot];
1833    r = -ENOENT;
1834    if (!memslot->dirty_bitmap)
1835        goto out;
1836
1837    kvm_ia64_sync_dirty_log(kvm, memslot);
1838    r = kvm_get_dirty_log(kvm, log, &is_dirty);
1839    if (r)
1840        goto out;
1841
1842    /* If nothing is dirty, don't bother messing with page tables. */
1843    if (is_dirty) {
1844        kvm_flush_remote_tlbs(kvm);
1845        n = kvm_dirty_bitmap_bytes(memslot);
1846        memset(memslot->dirty_bitmap, 0, n);
1847    }
1848    r = 0;
1849out:
1850    mutex_unlock(&kvm->slots_lock);
1851    return r;
1852}
1853
1854int kvm_arch_hardware_setup(void)
1855{
1856    return 0;
1857}
1858
1859void kvm_arch_hardware_unsetup(void)
1860{
1861}
1862
1863void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1864{
1865    int me;
1866    int cpu = vcpu->cpu;
1867
1868    if (waitqueue_active(&vcpu->wq))
1869        wake_up_interruptible(&vcpu->wq);
1870
1871    me = get_cpu();
1872    if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
1873        if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
1874            smp_send_reschedule(cpu);
1875    put_cpu();
1876}
1877
1878int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1879{
1880    return __apic_accept_irq(vcpu, irq->vector);
1881}
1882
1883int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1884{
1885    return apic->vcpu->vcpu_id == dest;
1886}
1887
1888int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1889{
1890    return 0;
1891}
1892
1893int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1894{
1895    return vcpu1->arch.xtp - vcpu2->arch.xtp;
1896}
1897
1898int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1899        int short_hand, int dest, int dest_mode)
1900{
1901    struct kvm_lapic *target = vcpu->arch.apic;
1902    return (dest_mode == 0) ?
1903        kvm_apic_match_physical_addr(target, dest) :
1904        kvm_apic_match_logical_addr(target, dest);
1905}
1906
1907static int find_highest_bits(int *dat)
1908{
1909    u32 bits, bitnum;
1910    int i;
1911
1912    /* loop for all 256 bits */
1913    for (i = 7; i >= 0 ; i--) {
1914        bits = dat[i];
1915        if (bits) {
1916            bitnum = fls(bits);
1917            return i * 32 + bitnum - 1;
1918        }
1919    }
1920
1921    return -1;
1922}
1923
1924int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1925{
1926    struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1927
1928    if (vpd->irr[0] & (1UL << NMI_VECTOR))
1929        return NMI_VECTOR;
1930    if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1931        return ExtINT_VECTOR;
1932
1933    return find_highest_bits((int *)&vpd->irr[0]);
1934}
1935
1936int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1937{
1938    return vcpu->arch.timer_fired;
1939}
1940
1941int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1942{
1943    return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1944        (kvm_highest_pending_irq(vcpu) != -1);
1945}
1946
1947int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1948                    struct kvm_mp_state *mp_state)
1949{
1950    mp_state->mp_state = vcpu->arch.mp_state;
1951    return 0;
1952}
1953
1954static int vcpu_reset(struct kvm_vcpu *vcpu)
1955{
1956    int r;
1957    long psr;
1958    local_irq_save(psr);
1959    r = kvm_insert_vmm_mapping(vcpu);
1960    local_irq_restore(psr);
1961    if (r)
1962        goto fail;
1963
1964    vcpu->arch.launched = 0;
1965    kvm_arch_vcpu_uninit(vcpu);
1966    r = kvm_arch_vcpu_init(vcpu);
1967    if (r)
1968        goto fail;
1969
1970    kvm_purge_vmm_mapping(vcpu);
1971    r = 0;
1972fail:
1973    return r;
1974}
1975
1976int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1977                    struct kvm_mp_state *mp_state)
1978{
1979    int r = 0;
1980
1981    vcpu->arch.mp_state = mp_state->mp_state;
1982    if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1983        r = vcpu_reset(vcpu);
1984    return r;
1985}
1986

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