vmport.c (9756B)
1 /* 2 * QEMU VMPort emulation 3 * 4 * Copyright (C) 2007 Hervé Poussineau 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 /* 26 * Guest code that interacts with this virtual device can be found 27 * in VMware open-vm-tools open-source project: 28 * https://github.com/vmware/open-vm-tools 29 */ 30 31 #include "qemu/osdep.h" 32 #include "hw/isa/isa.h" 33 #include "hw/i386/vmport.h" 34 #include "hw/qdev-properties.h" 35 #include "hw/boards.h" 36 #include "sysemu/sysemu.h" 37 #include "sysemu/hw_accel.h" 38 #include "sysemu/qtest.h" 39 #include "qemu/log.h" 40 #include "trace.h" 41 #include "qom/object.h" 42 43 #define VMPORT_MAGIC 0x564D5868 44 45 /* Compatibility flags for migration */ 46 #define VMPORT_COMPAT_READ_SET_EAX_BIT 0 47 #define VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD_BIT 1 48 #define VMPORT_COMPAT_REPORT_VMX_TYPE_BIT 2 49 #define VMPORT_COMPAT_CMDS_V2_BIT 3 50 #define VMPORT_COMPAT_READ_SET_EAX \ 51 (1 << VMPORT_COMPAT_READ_SET_EAX_BIT) 52 #define VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD \ 53 (1 << VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD_BIT) 54 #define VMPORT_COMPAT_REPORT_VMX_TYPE \ 55 (1 << VMPORT_COMPAT_REPORT_VMX_TYPE_BIT) 56 #define VMPORT_COMPAT_CMDS_V2 \ 57 (1 << VMPORT_COMPAT_CMDS_V2_BIT) 58 59 /* vCPU features reported by CMD_GET_VCPU_INFO */ 60 #define VCPU_INFO_SLC64_BIT 0 61 #define VCPU_INFO_SYNC_VTSCS_BIT 1 62 #define VCPU_INFO_HV_REPLAY_OK_BIT 2 63 #define VCPU_INFO_LEGACY_X2APIC_BIT 3 64 #define VCPU_INFO_RESERVED_BIT 31 65 66 OBJECT_DECLARE_SIMPLE_TYPE(VMPortState, VMPORT) 67 68 struct VMPortState { 69 ISADevice parent_obj; 70 71 MemoryRegion io; 72 VMPortReadFunc *func[VMPORT_ENTRIES]; 73 void *opaque[VMPORT_ENTRIES]; 74 75 uint32_t vmware_vmx_version; 76 uint8_t vmware_vmx_type; 77 78 uint32_t compat_flags; 79 }; 80 81 static VMPortState *port_state; 82 83 void vmport_register(VMPortCommand command, VMPortReadFunc *func, void *opaque) 84 { 85 assert(command < VMPORT_ENTRIES); 86 assert(port_state); 87 88 trace_vmport_register(command, func, opaque); 89 port_state->func[command] = func; 90 port_state->opaque[command] = opaque; 91 } 92 93 static uint64_t vmport_ioport_read(void *opaque, hwaddr addr, 94 unsigned size) 95 { 96 VMPortState *s = opaque; 97 CPUState *cs = current_cpu; 98 X86CPU *cpu = X86_CPU(cs); 99 CPUX86State *env; 100 unsigned char command; 101 uint32_t eax; 102 103 if (qtest_enabled()) { 104 return -1; 105 } 106 env = &cpu->env; 107 cpu_synchronize_state(cs); 108 109 eax = env->regs[R_EAX]; 110 if (eax != VMPORT_MAGIC) { 111 goto err; 112 } 113 114 command = env->regs[R_ECX]; 115 trace_vmport_command(command); 116 if (command >= VMPORT_ENTRIES || !s->func[command]) { 117 qemu_log_mask(LOG_UNIMP, "vmport: unknown command %x\n", command); 118 goto err; 119 } 120 121 eax = s->func[command](s->opaque[command], addr); 122 goto out; 123 124 err: 125 if (s->compat_flags & VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD) { 126 eax = UINT32_MAX; 127 } 128 129 out: 130 /* 131 * The call above to cpu_synchronize_state() gets vCPU registers values 132 * to QEMU but also cause QEMU to write QEMU vCPU registers values to 133 * vCPU implementation (e.g. Accelerator such as KVM) just before 134 * resuming guest. 135 * 136 * Therefore, in order to make IOPort return value propagate to 137 * guest EAX, we need to explicitly update QEMU EAX register value. 138 */ 139 if (s->compat_flags & VMPORT_COMPAT_READ_SET_EAX) { 140 cpu->env.regs[R_EAX] = eax; 141 } 142 143 return eax; 144 } 145 146 static void vmport_ioport_write(void *opaque, hwaddr addr, 147 uint64_t val, unsigned size) 148 { 149 X86CPU *cpu = X86_CPU(current_cpu); 150 151 if (qtest_enabled()) { 152 return; 153 } 154 cpu->env.regs[R_EAX] = vmport_ioport_read(opaque, addr, 4); 155 } 156 157 static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr) 158 { 159 X86CPU *cpu = X86_CPU(current_cpu); 160 161 if (qtest_enabled()) { 162 return -1; 163 } 164 cpu->env.regs[R_EBX] = VMPORT_MAGIC; 165 if (port_state->compat_flags & VMPORT_COMPAT_REPORT_VMX_TYPE) { 166 cpu->env.regs[R_ECX] = port_state->vmware_vmx_type; 167 } 168 return port_state->vmware_vmx_version; 169 } 170 171 static uint32_t vmport_cmd_get_bios_uuid(void *opaque, uint32_t addr) 172 { 173 X86CPU *cpu = X86_CPU(current_cpu); 174 uint32_t *uuid_parts = (uint32_t *)(qemu_uuid.data); 175 176 cpu->env.regs[R_EAX] = le32_to_cpu(uuid_parts[0]); 177 cpu->env.regs[R_EBX] = le32_to_cpu(uuid_parts[1]); 178 cpu->env.regs[R_ECX] = le32_to_cpu(uuid_parts[2]); 179 cpu->env.regs[R_EDX] = le32_to_cpu(uuid_parts[3]); 180 return cpu->env.regs[R_EAX]; 181 } 182 183 static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) 184 { 185 X86CPU *cpu = X86_CPU(current_cpu); 186 187 if (qtest_enabled()) { 188 return -1; 189 } 190 cpu->env.regs[R_EBX] = 0x1177; 191 return current_machine->ram_size; 192 } 193 194 static uint32_t vmport_cmd_get_hz(void *opaque, uint32_t addr) 195 { 196 X86CPU *cpu = X86_CPU(current_cpu); 197 198 if (cpu->env.tsc_khz && cpu->env.apic_bus_freq) { 199 uint64_t tsc_freq = (uint64_t)cpu->env.tsc_khz * 1000; 200 201 cpu->env.regs[R_ECX] = cpu->env.apic_bus_freq; 202 cpu->env.regs[R_EBX] = (uint32_t)(tsc_freq >> 32); 203 cpu->env.regs[R_EAX] = (uint32_t)tsc_freq; 204 } else { 205 /* Signal cmd as not supported */ 206 cpu->env.regs[R_EBX] = UINT32_MAX; 207 } 208 209 return cpu->env.regs[R_EAX]; 210 } 211 212 static uint32_t vmport_cmd_get_vcpu_info(void *opaque, uint32_t addr) 213 { 214 X86CPU *cpu = X86_CPU(current_cpu); 215 uint32_t ret = 0; 216 217 if (cpu->env.features[FEAT_1_ECX] & CPUID_EXT_X2APIC) { 218 ret |= 1 << VCPU_INFO_LEGACY_X2APIC_BIT; 219 } 220 221 return ret; 222 } 223 224 static const MemoryRegionOps vmport_ops = { 225 .read = vmport_ioport_read, 226 .write = vmport_ioport_write, 227 .impl = { 228 .min_access_size = 4, 229 .max_access_size = 4, 230 }, 231 .endianness = DEVICE_LITTLE_ENDIAN, 232 }; 233 234 static void vmport_realizefn(DeviceState *dev, Error **errp) 235 { 236 ISADevice *isadev = ISA_DEVICE(dev); 237 VMPortState *s = VMPORT(dev); 238 239 memory_region_init_io(&s->io, OBJECT(s), &vmport_ops, s, "vmport", 1); 240 isa_register_ioport(isadev, &s->io, 0x5658); 241 242 port_state = s; 243 244 /* Register some generic port commands */ 245 vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL); 246 vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL); 247 if (s->compat_flags & VMPORT_COMPAT_CMDS_V2) { 248 vmport_register(VMPORT_CMD_GETBIOSUUID, vmport_cmd_get_bios_uuid, NULL); 249 vmport_register(VMPORT_CMD_GETHZ, vmport_cmd_get_hz, NULL); 250 vmport_register(VMPORT_CMD_GET_VCPU_INFO, vmport_cmd_get_vcpu_info, 251 NULL); 252 } 253 } 254 255 static Property vmport_properties[] = { 256 /* Used to enforce compatibility for migration */ 257 DEFINE_PROP_BIT("x-read-set-eax", VMPortState, compat_flags, 258 VMPORT_COMPAT_READ_SET_EAX_BIT, true), 259 DEFINE_PROP_BIT("x-signal-unsupported-cmd", VMPortState, compat_flags, 260 VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD_BIT, true), 261 DEFINE_PROP_BIT("x-report-vmx-type", VMPortState, compat_flags, 262 VMPORT_COMPAT_REPORT_VMX_TYPE_BIT, true), 263 DEFINE_PROP_BIT("x-cmds-v2", VMPortState, compat_flags, 264 VMPORT_COMPAT_CMDS_V2_BIT, true), 265 266 /* Default value taken from open-vm-tools code VERSION_MAGIC definition */ 267 DEFINE_PROP_UINT32("vmware-vmx-version", VMPortState, 268 vmware_vmx_version, 6), 269 /* 270 * Value determines which VMware product type host report itself to guest. 271 * 272 * Most guests are fine with exposing host as VMware ESX server. 273 * Some legacy/proprietary guests hard-code a given type. 274 * 275 * For a complete list of values, refer to enum VMXType at open-vm-tools 276 * project (Defined at lib/include/vm_vmx_type.h). 277 * 278 * Reasonable options: 279 * 0 - Unset 280 * 1 - VMware Express (deprecated) 281 * 2 - VMware ESX Server 282 * 3 - VMware Server (Deprecated) 283 * 4 - VMware Workstation 284 * 5 - ACE 1.x (Deprecated) 285 */ 286 DEFINE_PROP_UINT8("vmware-vmx-type", VMPortState, vmware_vmx_type, 2), 287 288 DEFINE_PROP_END_OF_LIST(), 289 }; 290 291 static void vmport_class_initfn(ObjectClass *klass, void *data) 292 { 293 DeviceClass *dc = DEVICE_CLASS(klass); 294 295 dc->realize = vmport_realizefn; 296 /* Reason: realize sets global port_state */ 297 dc->user_creatable = false; 298 device_class_set_props(dc, vmport_properties); 299 } 300 301 static const TypeInfo vmport_info = { 302 .name = TYPE_VMPORT, 303 .parent = TYPE_ISA_DEVICE, 304 .instance_size = sizeof(VMPortState), 305 .class_init = vmport_class_initfn, 306 }; 307 308 static void vmport_register_types(void) 309 { 310 type_register_static(&vmport_info); 311 } 312 313 type_init(vmport_register_types)