void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine, uint16_t io_base, uint16_t io_len) { Aml *dev; Aml *crs; Aml *pkg; Aml *field; Aml *method; Aml *if_ctx; Aml *else_ctx; int i, apic_idx; Aml *sb_scope = aml_scope("_SB"); uint8_t madt_tmpl[8] = {0x00, 0x08, 0x00, 0x00, 0x00, 0, 0, 0}; Aml *cpu_id = aml_arg(0); Aml *cpu_on = aml_local(0); Aml *madt = aml_local(1); Aml *cpus_map = aml_name(CPU_ON_BITMAP); Aml *zero = aml_int(0); Aml *one = aml_int(1); MachineClass *mc = MACHINE_GET_CLASS(machine); CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(machine); PCMachineState *pcms = PC_MACHINE(machine); /* * _MAT method - creates an madt apic buffer * cpu_id = Arg0 = Processor ID = Local APIC ID * cpu_on = Local0 = CPON flag for this cpu * madt = Local1 = Buffer (in madt apic form) to return */ method = aml_method(CPU_MAT_METHOD, 1, AML_NOTSERIALIZED); aml_append(method, aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on)); aml_append(method, aml_store(aml_buffer(sizeof(madt_tmpl), madt_tmpl), madt)); /* Update the processor id, lapic id, and enable/disable status */ aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(2)))); aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(3)))); aml_append(method, aml_store(cpu_on, aml_index(madt, aml_int(4)))); aml_append(method, aml_return(madt)); aml_append(sb_scope, method); /* * _STA method - return ON status of cpu * cpu_id = Arg0 = Processor ID = Local APIC ID * cpu_on = Local0 = CPON flag for this cpu */ method = aml_method(CPU_STATUS_METHOD, 1, AML_NOTSERIALIZED); aml_append(method, aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on)); if_ctx = aml_if(cpu_on); { aml_append(if_ctx, aml_return(aml_int(0xF))); } aml_append(method, if_ctx); else_ctx = aml_else(); { aml_append(else_ctx, aml_return(zero)); } aml_append(method, else_ctx); aml_append(sb_scope, method); method = aml_method(CPU_EJECT_METHOD, 2, AML_NOTSERIALIZED); aml_append(method, aml_sleep(200)); aml_append(sb_scope, method); method = aml_method(CPU_SCAN_METHOD, 0, AML_NOTSERIALIZED); { Aml *while_ctx, *if_ctx2, *else_ctx2; Aml *bus_check_evt = aml_int(1); Aml *remove_evt = aml_int(3); Aml *status_map = aml_local(5); /* Local5 = active cpu bitmap */ Aml *byte = aml_local(2); /* Local2 = last read byte from bitmap */ Aml *idx = aml_local(0); /* Processor ID / APIC ID iterator */ Aml *is_cpu_on = aml_local(1); /* Local1 = CPON flag for cpu */ Aml *status = aml_local(3); /* Local3 = active state for cpu */ aml_append(method, aml_store(aml_name(CPU_STATUS_MAP), status_map)); aml_append(method, aml_store(zero, byte)); aml_append(method, aml_store(zero, idx)); /* While (idx < SizeOf(CPON)) */ while_ctx = aml_while(aml_lless(idx, aml_sizeof(cpus_map))); aml_append(while_ctx, aml_store(aml_derefof(aml_index(cpus_map, idx)), is_cpu_on)); if_ctx = aml_if(aml_and(idx, aml_int(0x07), NULL)); { /* Shift down previously read bitmap byte */ aml_append(if_ctx, aml_shiftright(byte, one, byte)); } aml_append(while_ctx, if_ctx); else_ctx = aml_else(); { /* Read next byte from cpu bitmap */ aml_append(else_ctx, aml_store(aml_derefof(aml_index(status_map, aml_shiftright(idx, aml_int(3), NULL))), byte)); } aml_append(while_ctx, else_ctx); aml_append(while_ctx, aml_store(aml_and(byte, one, NULL), status)); if_ctx = aml_if(aml_lnot(aml_equal(is_cpu_on, status))); { /* State change - update CPON with new state */ aml_append(if_ctx, aml_store(status, aml_index(cpus_map, idx))); if_ctx2 = aml_if(aml_equal(status, one)); { aml_append(if_ctx2, aml_call2(AML_NOTIFY_METHOD, idx, bus_check_evt)); } aml_append(if_ctx, if_ctx2); else_ctx2 = aml_else(); { aml_append(else_ctx2, aml_call2(AML_NOTIFY_METHOD, idx, remove_evt)); } } aml_append(if_ctx, else_ctx2); aml_append(while_ctx, if_ctx); aml_append(while_ctx, aml_increment(idx)); /* go to next cpu */ aml_append(method, while_ctx); } aml_append(sb_scope, method); /* The current AML generator can cover the APIC ID range [0..255], * inclusive, for VCPU hotplug. */ QEMU_BUILD_BUG_ON(ACPI_CPU_HOTPLUG_ID_LIMIT > 256); g_assert(pcms->apic_id_limit <= ACPI_CPU_HOTPLUG_ID_LIMIT); /* create PCI0.PRES device and its _CRS to reserve CPU hotplug MMIO */ dev = aml_device("PCI0." stringify(CPU_HOTPLUG_RESOURCE_DEVICE)); aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A06"))); aml_append(dev, aml_name_decl("_UID", aml_string("CPU Hotplug resources")) ); /* device present, functioning, decoding, not shown in UI */ aml_append(dev, aml_name_decl("_STA", aml_int(0xB))); crs = aml_resource_template(); aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1, io_len) ); aml_append(dev, aml_name_decl("_CRS", crs)); aml_append(sb_scope, dev); /* declare CPU hotplug MMIO region and PRS field to access it */ aml_append(sb_scope, aml_operation_region( "PRST", AML_SYSTEM_IO, aml_int(io_base), io_len)); field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE); aml_append(field, aml_named_field("PRS", 256)); aml_append(sb_scope, field); /* build Processor object for each processor */ for (i = 0; i < apic_ids->len; i++) { int apic_id = apic_ids->cpus[i].arch_id; assert(apic_id < ACPI_CPU_HOTPLUG_ID_LIMIT); dev = aml_processor(apic_id, 0, 0, "CP%.02X", apic_id); method = aml_method("_MAT", 0, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_call1(CPU_MAT_METHOD, aml_int(apic_id)))); aml_append(dev, method); method = aml_method("_STA", 0, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_call1(CPU_STATUS_METHOD, aml_int(apic_id)))); aml_append(dev, method); method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_call2(CPU_EJECT_METHOD, aml_int(apic_id), aml_arg(0))) ); aml_append(dev, method); aml_append(sb_scope, dev); } /* build this code: * Method(NTFY, 2) {If (LEqual(Arg0, 0x00)) {Notify(CP00, Arg1)} ...} */ /* Arg0 = Processor ID = APIC ID */ method = aml_method(AML_NOTIFY_METHOD, 2, AML_NOTSERIALIZED); for (i = 0; i < apic_ids->len; i++) { int apic_id = apic_ids->cpus[i].arch_id; if_ctx = aml_if(aml_equal(aml_arg(0), aml_int(apic_id))); aml_append(if_ctx, aml_notify(aml_name("CP%.02X", apic_id), aml_arg(1)) ); aml_append(method, if_ctx); } aml_append(sb_scope, method); /* build "Name(CPON, Package() { One, One, ..., Zero, Zero, ... })" * * Note: The ability to create variable-sized packages was first * introduced in ACPI 2.0. ACPI 1.0 only allowed fixed-size packages * ith up to 255 elements. Windows guests up to win2k8 fail when * VarPackageOp is used. */ pkg = pcms->apic_id_limit <= 255 ? aml_package(pcms->apic_id_limit) : aml_varpackage(pcms->apic_id_limit); for (i = 0, apic_idx = 0; i < apic_ids->len; i++) { int apic_id = apic_ids->cpus[i].arch_id; for (; apic_idx < apic_id; apic_idx++) { aml_append(pkg, aml_int(0)); } aml_append(pkg, aml_int(apic_ids->cpus[i].cpu ? 1 : 0)); apic_idx = apic_id + 1; } aml_append(sb_scope, aml_name_decl(CPU_ON_BITMAP, pkg)); g_free(apic_ids); aml_append(ctx, sb_scope); method = aml_method("\\_GPE._E02", 0, AML_NOTSERIALIZED); aml_append(method, aml_call0("\\_SB." CPU_SCAN_METHOD)); aml_append(ctx, method); }
void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine, uint16_t io_base, uint16_t io_len) { Aml *dev; Aml *crs; Aml *pkg; Aml *field; Aml *method; Aml *if_ctx; Aml *else_ctx; int i, apic_idx; Aml *sb_scope = aml_scope("_SB"); uint8_t madt_tmpl[8] = {0x00, 0x08, 0x00, 0x00, 0x00, 0, 0, 0}; Aml *cpu_id = aml_arg(0); Aml *cpu_on = aml_local(0); Aml *madt = aml_local(1); Aml *cpus_map = aml_name(CPU_ON_BITMAP); Aml *zero = aml_int(0); Aml *one = aml_int(1); MachineClass *mc = MACHINE_GET_CLASS(machine); CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(machine); PCMachineState *pcms = PC_MACHINE(machine);   method = aml_method(CPU_MAT_METHOD, 1, AML_NOTSERIALIZED); aml_append(method, aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on)); aml_append(method, aml_store(aml_buffer(sizeof(madt_tmpl), madt_tmpl), madt));   aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(2)))); aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(3)))); aml_append(method, aml_store(cpu_on, aml_index(madt, aml_int(4)))); aml_append(method, aml_return(madt)); aml_append(sb_scope, method);   method = aml_method(CPU_STATUS_METHOD, 1, AML_NOTSERIALIZED); aml_append(method, aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on)); if_ctx = aml_if(cpu_on); { aml_append(if_ctx, aml_return(aml_int(0xF))); } aml_append(method, if_ctx); else_ctx = aml_else(); { aml_append(else_ctx, aml_return(zero)); } aml_append(method, else_ctx); aml_append(sb_scope, method); method = aml_method(CPU_EJECT_METHOD, 2, AML_NOTSERIALIZED); aml_append(method, aml_sleep(200)); aml_append(sb_scope, method); method = aml_method(CPU_SCAN_METHOD, 0, AML_NOTSERIALIZED); { Aml *while_ctx, *if_ctx2, *else_ctx2; Aml *bus_check_evt = aml_int(1); Aml *remove_evt = aml_int(3); Aml *status_map = aml_local(5);   Aml *byte = aml_local(2);   Aml *idx = aml_local(0);   Aml *is_cpu_on = aml_local(1);   Aml *status = aml_local(3);   aml_append(method, aml_store(aml_name(CPU_STATUS_MAP), status_map)); aml_append(method, aml_store(zero, byte)); aml_append(method, aml_store(zero, idx));   while_ctx = aml_while(aml_lless(idx, aml_sizeof(cpus_map))); aml_append(while_ctx, aml_store(aml_derefof(aml_index(cpus_map, idx)), is_cpu_on)); if_ctx = aml_if(aml_and(idx, aml_int(0x07), NULL)); {   aml_append(if_ctx, aml_shiftright(byte, one, byte)); } aml_append(while_ctx, if_ctx); else_ctx = aml_else(); {   aml_append(else_ctx, aml_store(aml_derefof(aml_index(status_map, aml_shiftright(idx, aml_int(3), NULL))), byte)); } aml_append(while_ctx, else_ctx); aml_append(while_ctx, aml_store(aml_and(byte, one, NULL), status)); if_ctx = aml_if(aml_lnot(aml_equal(is_cpu_on, status))); {   aml_append(if_ctx, aml_store(status, aml_index(cpus_map, idx))); if_ctx2 = aml_if(aml_equal(status, one)); { aml_append(if_ctx2, aml_call2(AML_NOTIFY_METHOD, idx, bus_check_evt)); } aml_append(if_ctx, if_ctx2); else_ctx2 = aml_else(); { aml_append(else_ctx2, aml_call2(AML_NOTIFY_METHOD, idx, remove_evt)); } } aml_append(if_ctx, else_ctx2); aml_append(while_ctx, if_ctx); aml_append(while_ctx, aml_increment(idx));   aml_append(method, while_ctx); } aml_append(sb_scope, method);   QEMU_BUILD_BUG_ON(ACPI_CPU_HOTPLUG_ID_LIMIT > 256); g_assert(pcms->apic_id_limit <= ACPI_CPU_HOTPLUG_ID_LIMIT);   dev = aml_device("PCI0." stringify(CPU_HOTPLUG_RESOURCE_DEVICE)); aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A06"))); aml_append(dev, aml_name_decl("_UID", aml_string("CPU Hotplug resources")) );   aml_append(dev, aml_name_decl("_STA", aml_int(0xB))); crs = aml_resource_template(); aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1, io_len) ); aml_append(dev, aml_name_decl("_CRS", crs)); aml_append(sb_scope, dev);   aml_append(sb_scope, aml_operation_region( "PRST", AML_SYSTEM_IO, aml_int(io_base), io_len)); field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE); aml_append(field, aml_named_field("PRS", 256)); aml_append(sb_scope, field);   for (i = 0; i < apic_ids->len; i++) { int apic_id = apic_ids->cpus[i].arch_id; assert(apic_id < ACPI_CPU_HOTPLUG_ID_LIMIT); dev = aml_processor(apic_id, 0, 0, "CP%.02X", apic_id); method = aml_method("_MAT", 0, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_call1(CPU_MAT_METHOD, aml_int(apic_id)))); aml_append(dev, method); method = aml_method("_STA", 0, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_call1(CPU_STATUS_METHOD, aml_int(apic_id)))); aml_append(dev, method); method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_call2(CPU_EJECT_METHOD, aml_int(apic_id), aml_arg(0))) ); aml_append(dev, method); aml_append(sb_scope, dev); }     method = aml_method(AML_NOTIFY_METHOD, 2, AML_NOTSERIALIZED); for (i = 0; i < apic_ids->len; i++) { int apic_id = apic_ids->cpus[i].arch_id; if_ctx = aml_if(aml_equal(aml_arg(0), aml_int(apic_id))); aml_append(if_ctx, aml_notify(aml_name("CP%.02X", apic_id), aml_arg(1)) ); aml_append(method, if_ctx); } aml_append(sb_scope, method);   pkg = pcms->apic_id_limit <= 255 ? aml_package(pcms->apic_id_limit) : aml_varpackage(pcms->apic_id_limit); for (i = 0, apic_idx = 0; i < apic_ids->len; i++) { int apic_id = apic_ids->cpus[i].arch_id; for (; apic_idx < apic_id; apic_idx++) { aml_append(pkg, aml_int(0)); } aml_append(pkg, aml_int(apic_ids->cpus[i].cpu ? 1 : 0)); apic_idx = apic_id + 1; } aml_append(sb_scope, aml_name_decl(CPU_ON_BITMAP, pkg)); g_free(apic_ids); aml_append(ctx, sb_scope); method = aml_method("\\_GPE._E02", 0, AML_NOTSERIALIZED); aml_append(method, aml_call0("\\_SB." CPU_SCAN_METHOD)); aml_append(ctx, method); }