/* Support for generating ACPI tables and passing them to Guests * * Copyright (C) 2008-2010 Kevin O'Connor * Copyright (C) 2006 Fabrice Bellard * Copyright (C) 2013 Red Hat Inc * * Author: Michael S. Tsirkin * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License along * with this program; if not, see . */ #include "qemu/osdep.h" #include "qapi/error.h" #include "exec/memory.h" #include "hw/acpi/acpi.h" #include "hw/acpi/aml-build.h" #include "hw/acpi/utils.h" #include "target/i386/cpu.h" #include "acpi-build.h" #include "acpi-common.h" void pc_madt_cpu_entry(int uid, const CPUArchIdList *apic_ids, GArray *entry, bool force_enabled) { uint32_t apic_id = apic_ids->cpus[uid].arch_id; /* Flags – Local APIC Flags */ uint32_t flags = apic_ids->cpus[uid].cpu != NULL || force_enabled ? 1 /* Enabled */ : 0; /* ACPI spec says that LAPIC entry for non present * CPU may be omitted from MADT or it must be marked * as disabled. However omitting non present CPU from * MADT breaks hotplug on linux. So possible CPUs * should be put in MADT but kept disabled. */ if (apic_id < 255) { /* Rev 1.0b, Table 5-13 Processor Local APIC Structure */ build_append_int_noprefix(entry, 0, 1); /* Type */ build_append_int_noprefix(entry, 8, 1); /* Length */ build_append_int_noprefix(entry, uid, 1); /* ACPI Processor ID */ build_append_int_noprefix(entry, apic_id, 1); /* APIC ID */ build_append_int_noprefix(entry, flags, 4); /* Flags */ } else { /* Rev 4.0, 5.2.12.12 Processor Local x2APIC Structure */ build_append_int_noprefix(entry, 9, 1); /* Type */ build_append_int_noprefix(entry, 16, 1); /* Length */ build_append_int_noprefix(entry, 0, 2); /* Reserved */ build_append_int_noprefix(entry, apic_id, 4); /* X2APIC ID */ build_append_int_noprefix(entry, flags, 4); /* Flags */ build_append_int_noprefix(entry, uid, 4); /* ACPI Processor UID */ } } static void build_ioapic(GArray *entry, uint8_t id, uint32_t addr, uint32_t irq) { /* Rev 1.0b, 5.2.8.2 IO APIC */ build_append_int_noprefix(entry, 1, 1); /* Type */ build_append_int_noprefix(entry, 12, 1); /* Length */ build_append_int_noprefix(entry, id, 1); /* IO APIC ID */ build_append_int_noprefix(entry, 0, 1); /* Reserved */ build_append_int_noprefix(entry, addr, 4); /* IO APIC Address */ build_append_int_noprefix(entry, irq, 4); /* System Vector Base */ } static void build_xrupt_override(GArray *entry, uint8_t src, uint32_t gsi, uint16_t flags) { /* Rev 1.0b, 5.2.8.3.1 Interrupt Source Overrides */ build_append_int_noprefix(entry, 2, 1); /* Type */ build_append_int_noprefix(entry, 10, 1); /* Length */ build_append_int_noprefix(entry, 0, 1); /* Bus */ build_append_int_noprefix(entry, src, 1); /* Source */ /* Global System Interrupt Vector */ build_append_int_noprefix(entry, gsi, 4); build_append_int_noprefix(entry, flags, 2); /* Flags */ } /* * ACPI spec, Revision 1.0b * 5.2.8 Multiple APIC Description Table */ void acpi_build_madt(GArray *table_data, BIOSLinker *linker, X86MachineState *x86ms, const char *oem_id, const char *oem_table_id) { int i; bool x2apic_mode = false; MachineClass *mc = MACHINE_GET_CLASS(x86ms); X86MachineClass *x86mc = X86_MACHINE_GET_CLASS(x86ms); const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms)); AcpiTable table = { .sig = "APIC", .rev = 3, .oem_id = oem_id, .oem_table_id = oem_table_id }; acpi_table_begin(&table, table_data); /* Local APIC Address */ build_append_int_noprefix(table_data, APIC_DEFAULT_ADDRESS, 4); /* Flags. bit 0: PCAT_COMPAT */ build_append_int_noprefix(table_data, x86ms->pic != ON_OFF_AUTO_OFF ? 1 : 0 , 4); for (i = 0; i < apic_ids->len; i++) { pc_madt_cpu_entry(i, apic_ids, table_data, false); if (apic_ids->cpus[i].arch_id > 254) { x2apic_mode = true; } } build_ioapic(table_data, ACPI_BUILD_IOAPIC_ID, IO_APIC_DEFAULT_ADDRESS, 0); if (x86ms->ioapic2) { build_ioapic(table_data, ACPI_BUILD_IOAPIC_ID + 1, IO_APIC_SECONDARY_ADDRESS, IO_APIC_SECONDARY_IRQBASE); } if (x86mc->apic_xrupt_override) { build_xrupt_override(table_data, 0, 2, 0 /* Flags: Conforms to the specifications of the bus */); } for (i = 1; i < 16; i++) { if (!(x86ms->pci_irq_mask & (1 << i))) { /* No need for a INT source override structure. */ continue; } build_xrupt_override(table_data, i, i, 0xd /* Flags: Active high, Level Triggered */); } if (x2apic_mode) { /* Rev 4.0, 5.2.12.13 Local x2APIC NMI Structure*/ build_append_int_noprefix(table_data, 0xA, 1); /* Type */ build_append_int_noprefix(table_data, 12, 1); /* Length */ build_append_int_noprefix(table_data, 0, 2); /* Flags */ /* ACPI Processor UID */ build_append_int_noprefix(table_data, 0xFFFFFFFF /* all processors */, 4); /* Local x2APIC LINT# */ build_append_int_noprefix(table_data, 1 /* ACPI_LINT1 */, 1); build_append_int_noprefix(table_data, 0, 3); /* Reserved */ } else { /* Rev 1.0b, 5.2.8.3.3 Local APIC NMI */ build_append_int_noprefix(table_data, 4, 1); /* Type */ build_append_int_noprefix(table_data, 6, 1); /* Length */ /* ACPI Processor ID */ build_append_int_noprefix(table_data, 0xFF /* all processors */, 1); build_append_int_noprefix(table_data, 0, 2); /* Flags */ /* Local APIC INTI# */ build_append_int_noprefix(table_data, 1 /* ACPI_LINT1 */, 1); } acpi_table_end(linker, &table); }