hw/kvm/apic.c

   1 /*
   2  * KVM in-kernel APIC support
   3  *
   4  * Copyright (c) 2011 Siemens AG
   5  *
   6  * Authors:
   7  *  Jan Kiszka          <jan.kiszka@siemens.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL version 2.
  10  * See the COPYING file in the top-level directory.
  11  */
  12 #include "hw/apic_internal.h"
  13 #include "kvm.h"
  14
  15 static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic,
  16                                     int reg_id, uint32_t val)
  17 {
  18     *((uint32_t *)(kapic->regs + (reg_id << 4))) = val;
  19 }
  20
  21 static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic,
  22                                         int reg_id)
  23 {
  24     return *((uint32_t *)(kapic->regs + (reg_id << 4)));
  25 }
  26
  27 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
  28 {
  29     APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
  30     int i;
  31
  32     memset(kapic, 0, sizeof(kapic));
  33     kvm_apic_set_reg(kapic, 0x2, s->id << 24);
  34     kvm_apic_set_reg(kapic, 0x8, s->tpr);
  35     kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24);
  36     kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff);
  37     kvm_apic_set_reg(kapic, 0xf, s->spurious_vec);
  38     for (i = 0; i < 8; i++) {
  39         kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]);
  40         kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]);
  41         kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]);
  42     }
  43     kvm_apic_set_reg(kapic, 0x28, s->esr);
  44     kvm_apic_set_reg(kapic, 0x30, s->icr[0]);
  45     kvm_apic_set_reg(kapic, 0x31, s->icr[1]);
  46     for (i = 0; i < APIC_LVT_NB; i++) {
  47         kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]);
  48     }
  49     kvm_apic_set_reg(kapic, 0x38, s->initial_count);
  50     kvm_apic_set_reg(kapic, 0x3e, s->divide_conf);
  51 }
  52
  53 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
  54 {
  55     APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
  56     int i, v;
  57
  58     s->id = kvm_apic_get_reg(kapic, 0x2) >> 24;
  59     s->tpr = kvm_apic_get_reg(kapic, 0x8);
  60     s->arb_id = kvm_apic_get_reg(kapic, 0x9);
  61     s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24;
  62     s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28;
  63     s->spurious_vec = kvm_apic_get_reg(kapic, 0xf);
  64     for (i = 0; i < 8; i++) {
  65         s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i);
  66         s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i);
  67         s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i);
  68     }
  69     s->esr = kvm_apic_get_reg(kapic, 0x28);
  70     s->icr[0] = kvm_apic_get_reg(kapic, 0x30);
  71     s->icr[1] = kvm_apic_get_reg(kapic, 0x31);
  72     for (i = 0; i < APIC_LVT_NB; i++) {
  73         s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i);
  74     }
  75     s->initial_count = kvm_apic_get_reg(kapic, 0x38);
  76     s->divide_conf = kvm_apic_get_reg(kapic, 0x3e);
  77
  78     v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);
  79     s->count_shift = (v + 1) & 7;
  80
  81     s->initial_count_load_time = qemu_get_clock_ns(vm_clock);
  82     apic_next_timer(s, s->initial_count_load_time);
  83 }
  84
  85 static void kvm_apic_set_base(APICCommonState *s, uint64_t val)
  86 {
  87     s->apicbase = val;
  88 }
  89
  90 static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val)
  91 {
  92     s->tpr = (val & 0x0f) << 4;
  93 }
  94
  95 static void do_inject_external_nmi(void *data)
  96 {
  97     APICCommonState *s = data;
  98     CPUState *env = s->cpu_env;
  99     uint32_t lvt;
 100     int ret;
 101
 102     cpu_synchronize_state(env);
 103
 104     lvt = s->lvt[APIC_LVT_LINT1];
 105     if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) {
 106         ret = kvm_vcpu_ioctl(env, KVM_NMI);
 107         if (ret < 0) {
 108             fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
 109                     strerror(-ret));
 110         }
 111     }
 112 }
 113
 114 static void kvm_apic_external_nmi(APICCommonState *s)
 115 {
 116     run_on_cpu(s->cpu_env, do_inject_external_nmi, s);
 117 }
 118
 119 static void kvm_apic_init(APICCommonState *s)
 120 {
 121     memory_region_init_reservation(&s->io_memory, "kvm-apic-msi",
 122                                    MSI_SPACE_SIZE);
 123 }
 124
 125 static void kvm_apic_class_init(ObjectClass *klass, void *data)
 126 {
 127     APICCommonClass *k = APIC_COMMON_CLASS(klass);
 128
 129     k->init = kvm_apic_init;
 130     k->set_base = kvm_apic_set_base;
 131     k->set_tpr = kvm_apic_set_tpr;
 132     k->external_nmi = kvm_apic_external_nmi;
 133 }
 134
 135 static TypeInfo kvm_apic_info = {
 136     .name = "kvm-apic",
 137     .parent = TYPE_APIC_COMMON,
 138     .instance_size = sizeof(APICCommonState),
 139     .class_init = kvm_apic_class_init,
 140 };
 141
 142 static void kvm_apic_register_types(void)
 143 {
 144     type_register_static(&kvm_apic_info);
 145 }
 146
 147 type_init(kvm_apic_register_types)