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 uint8_t kvm_apic_get_tpr(APICCommonState *s)
  96 {
  97     return s->tpr >> 4;
  98 }
  99
 100 static void kvm_apic_enable_tpr_reporting(APICCommonState *s, bool enable)
 101 {
 102     struct kvm_tpr_access_ctl ctl = {
 103         .enabled = enable
 104     };
 105
 106     kvm_vcpu_ioctl(s->cpu_env, KVM_TPR_ACCESS_REPORTING, &ctl);
 107 }
 108
 109 static void kvm_apic_vapic_base_update(APICCommonState *s)
 110 {
 111     struct kvm_vapic_addr vapid_addr = {
 112         .vapic_addr = s->vapic_paddr,
 113     };
 114     int ret;
 115
 116     ret = kvm_vcpu_ioctl(s->cpu_env, KVM_SET_VAPIC_ADDR, &vapid_addr);
 117     if (ret < 0) {
 118         fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n",
 119                 strerror(-ret));
 120         abort();
 121     }
 122 }
 123
 124 static void do_inject_external_nmi(void *data)
 125 {
 126     APICCommonState *s = data;
 127     CPUX86State *env = s->cpu_env;
 128     uint32_t lvt;
 129     int ret;
 130
 131     cpu_synchronize_state(env);
 132
 133     lvt = s->lvt[APIC_LVT_LINT1];
 134     if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) {
 135         ret = kvm_vcpu_ioctl(env, KVM_NMI);
 136         if (ret < 0) {
 137             fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
 138                     strerror(-ret));
 139         }
 140     }
 141 }
 142
 143 static void kvm_apic_external_nmi(APICCommonState *s)
 144 {
 145     run_on_cpu(s->cpu_env, do_inject_external_nmi, s);
 146 }
 147
 148 static void kvm_apic_init(APICCommonState *s)
 149 {
 150     memory_region_init_reservation(&s->io_memory, "kvm-apic-msi",
 151                                    MSI_SPACE_SIZE);
 152 }
 153
 154 static void kvm_apic_class_init(ObjectClass *klass, void *data)
 155 {
 156     APICCommonClass *k = APIC_COMMON_CLASS(klass);
 157
 158     k->init = kvm_apic_init;
 159     k->set_base = kvm_apic_set_base;
 160     k->set_tpr = kvm_apic_set_tpr;
 161     k->get_tpr = kvm_apic_get_tpr;
 162     k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting;
 163     k->vapic_base_update = kvm_apic_vapic_base_update;
 164     k->external_nmi = kvm_apic_external_nmi;
 165 }
 166
 167 static TypeInfo kvm_apic_info = {
 168     .name = "kvm-apic",
 169     .parent = TYPE_APIC_COMMON,
 170     .instance_size = sizeof(APICCommonState),
 171     .class_init = kvm_apic_class_init,
 172 };
 173
 174 static void kvm_apic_register_types(void)
 175 {
 176     type_register_static(&kvm_apic_info);
 177 }
 178
 179 type_init(kvm_apic_register_types)