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 "qemu-common.h" 14 #include "cpu.h" 15 #include "hw/i386/apic_internal.h" 16 #include "hw/pci/msi.h" 17 #include "sysemu/kvm.h" 18 19 static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic, 20 int reg_id, uint32_t val) 21 { 22 *((uint32_t *)(kapic->regs + (reg_id << 4))) = val; 23 } 24 25 static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic, 26 int reg_id) 27 { 28 return *((uint32_t *)(kapic->regs + (reg_id << 4))); 29 } 30 31 void kvm_put_apic_state(DeviceState *dev, struct kvm_lapic_state *kapic) 32 { 33 APICCommonState *s = APIC_COMMON(dev); 34 int i; 35 36 memset(kapic, 0, sizeof(*kapic)); 37 kvm_apic_set_reg(kapic, 0x2, s->id << 24); 38 kvm_apic_set_reg(kapic, 0x8, s->tpr); 39 kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24); 40 kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff); 41 kvm_apic_set_reg(kapic, 0xf, s->spurious_vec); 42 for (i = 0; i < 8; i++) { 43 kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]); 44 kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]); 45 kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]); 46 } 47 kvm_apic_set_reg(kapic, 0x28, s->esr); 48 kvm_apic_set_reg(kapic, 0x30, s->icr[0]); 49 kvm_apic_set_reg(kapic, 0x31, s->icr[1]); 50 for (i = 0; i < APIC_LVT_NB; i++) { 51 kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]); 52 } 53 kvm_apic_set_reg(kapic, 0x38, s->initial_count); 54 kvm_apic_set_reg(kapic, 0x3e, s->divide_conf); 55 } 56 57 void kvm_get_apic_state(DeviceState *dev, struct kvm_lapic_state *kapic) 58 { 59 APICCommonState *s = APIC_COMMON(dev); 60 int i, v; 61 62 s->id = kvm_apic_get_reg(kapic, 0x2) >> 24; 63 s->tpr = kvm_apic_get_reg(kapic, 0x8); 64 s->arb_id = kvm_apic_get_reg(kapic, 0x9); 65 s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24; 66 s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28; 67 s->spurious_vec = kvm_apic_get_reg(kapic, 0xf); 68 for (i = 0; i < 8; i++) { 69 s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i); 70 s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i); 71 s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i); 72 } 73 s->esr = kvm_apic_get_reg(kapic, 0x28); 74 s->icr[0] = kvm_apic_get_reg(kapic, 0x30); 75 s->icr[1] = kvm_apic_get_reg(kapic, 0x31); 76 for (i = 0; i < APIC_LVT_NB; i++) { 77 s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i); 78 } 79 s->initial_count = kvm_apic_get_reg(kapic, 0x38); 80 s->divide_conf = kvm_apic_get_reg(kapic, 0x3e); 81 82 v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4); 83 s->count_shift = (v + 1) & 7; 84 85 s->initial_count_load_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 86 apic_next_timer(s, s->initial_count_load_time); 87 } 88 89 static void kvm_apic_set_base(APICCommonState *s, uint64_t val) 90 { 91 s->apicbase = val; 92 } 93 94 static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val) 95 { 96 s->tpr = (val & 0x0f) << 4; 97 } 98 99 static uint8_t kvm_apic_get_tpr(APICCommonState *s) 100 { 101 return s->tpr >> 4; 102 } 103 104 static void kvm_apic_enable_tpr_reporting(APICCommonState *s, bool enable) 105 { 106 struct kvm_tpr_access_ctl ctl = { 107 .enabled = enable 108 }; 109 110 kvm_vcpu_ioctl(CPU(s->cpu), KVM_TPR_ACCESS_REPORTING, &ctl); 111 } 112 113 static void kvm_apic_vapic_base_update(APICCommonState *s) 114 { 115 struct kvm_vapic_addr vapid_addr = { 116 .vapic_addr = s->vapic_paddr, 117 }; 118 int ret; 119 120 ret = kvm_vcpu_ioctl(CPU(s->cpu), KVM_SET_VAPIC_ADDR, &vapid_addr); 121 if (ret < 0) { 122 fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n", 123 strerror(-ret)); 124 abort(); 125 } 126 } 127 128 static void do_inject_external_nmi(void *data) 129 { 130 APICCommonState *s = data; 131 CPUState *cpu = CPU(s->cpu); 132 uint32_t lvt; 133 int ret; 134 135 cpu_synchronize_state(cpu); 136 137 lvt = s->lvt[APIC_LVT_LINT1]; 138 if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) { 139 ret = kvm_vcpu_ioctl(cpu, KVM_NMI); 140 if (ret < 0) { 141 fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", 142 strerror(-ret)); 143 } 144 } 145 } 146 147 static void kvm_apic_external_nmi(APICCommonState *s) 148 { 149 run_on_cpu(CPU(s->cpu), do_inject_external_nmi, s); 150 } 151 152 static uint64_t kvm_apic_mem_read(void *opaque, hwaddr addr, 153 unsigned size) 154 { 155 return ~(uint64_t)0; 156 } 157 158 static void kvm_apic_mem_write(void *opaque, hwaddr addr, 159 uint64_t data, unsigned size) 160 { 161 MSIMessage msg = { .address = addr, .data = data }; 162 int ret; 163 164 ret = kvm_irqchip_send_msi(kvm_state, msg); 165 if (ret < 0) { 166 fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n", 167 strerror(-ret)); 168 } 169 } 170 171 static const MemoryRegionOps kvm_apic_io_ops = { 172 .read = kvm_apic_mem_read, 173 .write = kvm_apic_mem_write, 174 .endianness = DEVICE_NATIVE_ENDIAN, 175 }; 176 177 static void kvm_apic_reset(APICCommonState *s) 178 { 179 /* Not used by KVM, which uses the CPU mp_state instead. */ 180 s->wait_for_sipi = 0; 181 } 182 183 static void kvm_apic_realize(DeviceState *dev, Error **errp) 184 { 185 APICCommonState *s = APIC_COMMON(dev); 186 187 memory_region_init_io(&s->io_memory, OBJECT(s), &kvm_apic_io_ops, s, 188 "kvm-apic-msi", APIC_SPACE_SIZE); 189 190 if (kvm_has_gsi_routing()) { 191 msi_nonbroken = true; 192 } 193 } 194 195 static void kvm_apic_unrealize(DeviceState *dev, Error **errp) 196 { 197 } 198 199 static void kvm_apic_class_init(ObjectClass *klass, void *data) 200 { 201 APICCommonClass *k = APIC_COMMON_CLASS(klass); 202 203 k->realize = kvm_apic_realize; 204 k->unrealize = kvm_apic_unrealize; 205 k->reset = kvm_apic_reset; 206 k->set_base = kvm_apic_set_base; 207 k->set_tpr = kvm_apic_set_tpr; 208 k->get_tpr = kvm_apic_get_tpr; 209 k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting; 210 k->vapic_base_update = kvm_apic_vapic_base_update; 211 k->external_nmi = kvm_apic_external_nmi; 212 } 213 214 static const TypeInfo kvm_apic_info = { 215 .name = "kvm-apic", 216 .parent = TYPE_APIC_COMMON, 217 .instance_size = sizeof(APICCommonState), 218 .class_init = kvm_apic_class_init, 219 }; 220 221 static void kvm_apic_register_types(void) 222 { 223 type_register_static(&kvm_apic_info); 224 } 225 226 type_init(kvm_apic_register_types) 227