diff options
Diffstat (limited to 'hw/i386/acpi-microvm.c')
| -rw-r--r-- | hw/i386/acpi-microvm.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c new file mode 100644 index 0000000000..06ef33949f --- /dev/null +++ b/hw/i386/acpi-microvm.c @@ -0,0 +1,187 @@ +/* Support for generating ACPI tables and passing them to Guests + * + * Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net> + * Copyright (C) 2006 Fabrice Bellard + * Copyright (C) 2013 Red Hat Inc + * + * Author: Michael S. Tsirkin <mst@redhat.com> + * + * 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 <http://www.gnu.org/licenses/>. + */ + +#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/bios-linker-loader.h" +#include "hw/acpi/generic_event_device.h" +#include "hw/acpi/utils.h" +#include "hw/boards.h" +#include "hw/i386/fw_cfg.h" +#include "hw/i386/microvm.h" + +#include "acpi-common.h" +#include "acpi-microvm.h" + +static void +build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, + MicrovmMachineState *mms) +{ + X86MachineState *x86ms = X86_MACHINE(mms); + Aml *dsdt, *sb_scope, *scope, *pkg; + bool ambiguous; + Object *isabus; + + isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); + assert(isabus); + assert(!ambiguous); + + dsdt = init_aml_allocator(); + + /* Reserve space for header */ + acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader)); + + sb_scope = aml_scope("_SB"); + fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); + isa_build_aml(ISA_BUS(isabus), sb_scope); + build_ged_aml(sb_scope, GED_DEVICE, HOTPLUG_HANDLER(mms->acpi_dev), + GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); + acpi_dsdt_add_power_button(sb_scope); + aml_append(dsdt, sb_scope); + + /* ACPI 5.0: Table 7-209 System State Package */ + scope = aml_scope("\\"); + pkg = aml_package(4); + aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); + aml_append(pkg, aml_int(0)); /* ignored */ + aml_append(pkg, aml_int(0)); /* reserved */ + aml_append(pkg, aml_int(0)); /* reserved */ + aml_append(scope, aml_name_decl("_S5", pkg)); + aml_append(dsdt, scope); + + /* copy AML table into ACPI tables blob and patch header there */ + g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); + build_header(linker, table_data, + (void *)(table_data->data + table_data->len - dsdt->buf->len), + "DSDT", dsdt->buf->len, 2, NULL, NULL); + free_aml_allocator(); +} + +static void acpi_build_microvm(AcpiBuildTables *tables, + MicrovmMachineState *mms) +{ + MachineState *machine = MACHINE(mms); + GArray *table_offsets; + GArray *tables_blob = tables->table_data; + unsigned dsdt, xsdt; + AcpiFadtData pmfadt = { + /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ + .rev = 5, + .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | + (1 << ACPI_FADT_F_RESET_REG_SUP)), + + /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ + .sleep_ctl = { + .space_id = AML_AS_SYSTEM_MEMORY, + .bit_width = 8, + .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, + }, + .sleep_sts = { + .space_id = AML_AS_SYSTEM_MEMORY, + .bit_width = 8, + .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, + }, + + /* ACPI 5.0: 4.8.3.6 Reset Register */ + .reset_reg = { + .space_id = AML_AS_SYSTEM_MEMORY, + .bit_width = 8, + .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, + }, + .reset_val = ACPI_GED_RESET_VALUE, + }; + + table_offsets = g_array_new(false, true /* clear */, + sizeof(uint32_t)); + bios_linker_loader_alloc(tables->linker, + ACPI_BUILD_TABLE_FILE, tables_blob, + 64 /* Ensure FACS is aligned */, + false /* high memory */); + + dsdt = tables_blob->len; + build_dsdt_microvm(tables_blob, tables->linker, mms); + + pmfadt.dsdt_tbl_offset = &dsdt; + pmfadt.xdsdt_tbl_offset = &dsdt; + acpi_add_table(table_offsets, tables_blob); + build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL); + + acpi_add_table(table_offsets, tables_blob); + acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), + mms->acpi_dev, false); + + xsdt = tables_blob->len; + build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL); + + /* RSDP is in FSEG memory, so allocate it separately */ + { + AcpiRsdpData rsdp_data = { + /* ACPI 2.0: 5.2.4.3 RSDP Structure */ + .revision = 2, /* xsdt needs v2 */ + .oem_id = ACPI_BUILD_APPNAME6, + .xsdt_tbl_offset = &xsdt, + .rsdt_tbl_offset = NULL, + }; + build_rsdp(tables->rsdp, tables->linker, &rsdp_data); + } + + /* Cleanup memory that's no longer used. */ + g_array_free(table_offsets, true); +} + +static void acpi_build_no_update(void *build_opaque) +{ + /* nothing, microvm tables don't change at runtime */ +} + +void acpi_setup_microvm(MicrovmMachineState *mms) +{ + X86MachineState *x86ms = X86_MACHINE(mms); + AcpiBuildTables tables; + + assert(x86ms->fw_cfg); + + if (!x86_machine_is_acpi_enabled(x86ms)) { + return; + } + + acpi_build_tables_init(&tables); + acpi_build_microvm(&tables, mms); + + /* Now expose it all to Guest */ + acpi_add_rom_blob(acpi_build_no_update, NULL, + tables.table_data, + ACPI_BUILD_TABLE_FILE, + ACPI_BUILD_TABLE_MAX_SIZE); + acpi_add_rom_blob(acpi_build_no_update, NULL, + tables.linker->cmd_blob, + "etc/table-loader", 0); + acpi_add_rom_blob(acpi_build_no_update, NULL, + tables.rsdp, + ACPI_BUILD_RSDP_FILE, 0); + + acpi_build_tables_cleanup(&tables, false); +} |