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 "qemu/osdep.h" 13 #include "hw/i386/apic_internal.h" 14 #include "hw/pci/msi.h" 15 #include "sysemu/kvm.h" 16 17 static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic, 18 int reg_id, uint32_t val) 19 { 20 *((uint32_t *)(kapic->regs + (reg_id << 4))) = val; 21 } 22 23 static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic, 24 int reg_id) 25 { 26 return *((uint32_t *)(kapic->regs + (reg_id << 4))); 27 } 28 29 void kvm_put_apic_state(DeviceState *dev, struct kvm_lapic_state *kapic) 30 { 31 APICCommonState *s = APIC_COMMON(dev); 32 int i; 33 34 memset(kapic, 0, sizeof(*kapic)); 35 kvm_apic_set_reg(kapic, 0x2, s->id << 24); 36 kvm_apic_set_reg(kapic, 0x8, s->tpr); 37 kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24); 38 kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff); 39 kvm_apic_set_reg(kapic, 0xf, s->spurious_vec); 40 for (i = 0; i < 8; i++) { 41 kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]); 42 kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]); 43 kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]); 44 } 45 kvm_apic_set_reg(kapic, 0x28, s->esr); 46 kvm_apic_set_reg(kapic, 0x30, s->icr[0]); 47 kvm_apic_set_reg(kapic, 0x31, s->icr[1]); 48 for (i = 0; i < APIC_LVT_NB; i++) { 49 kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]); 50 } 51 kvm_apic_set_reg(kapic, 0x38, s->initial_count); 52 kvm_apic_set_reg(kapic, 0x3e, s->divide_conf); 53 } 54 55 void kvm_get_apic_state(DeviceState *dev, struct kvm_lapic_state *kapic) 56 { 57 APICCommonState *s = APIC_COMMON(dev); 58 int i, v; 59 60 s->id = kvm_apic_get_reg(kapic, 0x2) >> 24; 61 s->tpr = kvm_apic_get_reg(kapic, 0x8); 62 s->arb_id = kvm_apic_get_reg(kapic, 0x9); 63 s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24; 64 s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28; 65 s->spurious_vec = kvm_apic_get_reg(kapic, 0xf); 66 for (i = 0; i < 8; i++) { 67 s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i); 68 s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i); 69 s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i); 70 } 71 s->esr = kvm_apic_get_reg(kapic, 0x28); 72 s->icr[0] = kvm_apic_get_reg(kapic, 0x30); 73 s->icr[1] = kvm_apic_get_reg(kapic, 0x31); 74 for (i = 0; i < APIC_LVT_NB; i++) { 75 s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i); 76 } 77 s->initial_count = kvm_apic_get_reg(kapic, 0x38); 78 s->divide_conf = kvm_apic_get_reg(kapic, 0x3e); 79 80 v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4); 81 s->count_shift = (v + 1) & 7; 82 83 s->initial_count_load_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 84 apic_next_timer(s, s->initial_count_load_time); 85 } 86 87 static void kvm_apic_set_base(APICCommonState *s, uint64_t val) 88 { 89 s->apicbase = val; 90 } 91 92 static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val) 93 { 94 s->tpr = (val & 0x0f) << 4; 95 } 96 97 static uint8_t kvm_apic_get_tpr(APICCommonState *s) 98 { 99 return s->tpr >> 4; 100 } 101 102 static void kvm_apic_enable_tpr_reporting(APICCommonState *s, bool enable) 103 { 104 struct kvm_tpr_access_ctl ctl = { 105 .enabled = enable 106 }; 107 108 kvm_vcpu_ioctl(CPU(s->cpu), KVM_TPR_ACCESS_REPORTING, &ctl); 109 } 110 111 static void kvm_apic_vapic_base_update(APICCommonState *s) 112 { 113 struct kvm_vapic_addr vapid_addr = { 114 .vapic_addr = s->vapic_paddr, 115 }; 116 int ret; 117 118 ret = kvm_vcpu_ioctl(CPU(s->cpu), KVM_SET_VAPIC_ADDR, &vapid_addr); 119 if (ret < 0) { 120 fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n", 121 strerror(-ret)); 122 abort(); 123 } 124 } 125 126 static void do_inject_external_nmi(void *data) 127 { 128 APICCommonState *s = data; 129 CPUState *cpu = CPU(s->cpu); 130 uint32_t lvt; 131 int ret; 132 133 cpu_synchronize_state(cpu); 134 135 lvt = s->lvt[APIC_LVT_LINT1]; 136 if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) { 137 ret = kvm_vcpu_ioctl(cpu, KVM_NMI); 138 if (ret < 0) { 139 fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", 140 strerror(-ret)); 141 } 142 } 143 } 144 145 static void kvm_apic_external_nmi(APICCommonState *s) 146 { 147 run_on_cpu(CPU(s->cpu), do_inject_external_nmi, s); 148 } 149 150 static uint64_t kvm_apic_mem_read(void *opaque, hwaddr addr, 151 unsigned size) 152 { 153 return ~(uint64_t)0; 154 } 155 156 static void kvm_apic_mem_write(void *opaque, hwaddr addr, 157 uint64_t data, unsigned size) 158 { 159 MSIMessage msg = { .address = addr, .data = data }; 160 int ret; 161 162 ret = kvm_irqchip_send_msi(kvm_state, msg); 163 if (ret < 0) { 164 fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n", 165 strerror(-ret)); 166 } 167 } 168 169 static const MemoryRegionOps kvm_apic_io_ops = { 170 .read = kvm_apic_mem_read, 171 .write = kvm_apic_mem_write, 172 .endianness = DEVICE_NATIVE_ENDIAN, 173 }; 174 175 static void kvm_apic_reset(APICCommonState *s) 176 { 177 /* Not used by KVM, which uses the CPU mp_state instead. */ 178 s->wait_for_sipi = 0; 179 } 180 181 static void kvm_apic_realize(DeviceState *dev, Error **errp) 182 { 183 APICCommonState *s = APIC_COMMON(dev); 184 185 memory_region_init_io(&s->io_memory, NULL, &kvm_apic_io_ops, s, "kvm-apic-msi", 186 APIC_SPACE_SIZE); 187 188 if (kvm_has_gsi_routing()) { 189 msi_supported = true; 190 } 191 } 192 193 static void kvm_apic_class_init(ObjectClass *klass, void *data) 194 { 195 APICCommonClass *k = APIC_COMMON_CLASS(klass); 196 197 k->realize = kvm_apic_realize; 198 k->reset = kvm_apic_reset; 199 k->set_base = kvm_apic_set_base; 200 k->set_tpr = kvm_apic_set_tpr; 201 k->get_tpr = kvm_apic_get_tpr; 202 k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting; 203 k->vapic_base_update = kvm_apic_vapic_base_update; 204 k->external_nmi = kvm_apic_external_nmi; 205 } 206 207 static const TypeInfo kvm_apic_info = { 208 .name = "kvm-apic", 209 .parent = TYPE_APIC_COMMON, 210 .instance_size = sizeof(APICCommonState), 211 .class_init = kvm_apic_class_init, 212 }; 213 214 static void kvm_apic_register_types(void) 215 { 216 type_register_static(&kvm_apic_info); 217 } 218 219 type_init(kvm_apic_register_types) 220