/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Support for generating ACPI tables and passing them to Guests
*
* Copyright (C) 2021 Loongson Technology Corporation Limited
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/bitmap.h"
#include "hw/pci/pci.h"
#include "hw/core/cpu.h"
#include "target/loongarch/cpu.h"
#include "hw/acpi/acpi-defs.h"
#include "hw/acpi/acpi.h"
#include "hw/nvram/fw_cfg.h"
#include "hw/acpi/bios-linker-loader.h"
#include "migration/vmstate.h"
#include "hw/mem/memory-device.h"
#include "sysemu/reset.h"
/* Supported chipsets: */
#include "hw/pci-host/ls7a.h"
#include "hw/loongarch/virt.h"
#include "hw/acpi/aml-build.h"
#include "hw/acpi/utils.h"
#include "hw/acpi/pci.h"
#include "qom/qom-qobject.h"
#include "hw/acpi/generic_event_device.h"
#include "hw/pci-host/gpex.h"
#include "sysemu/tpm.h"
#include "hw/platform-bus.h"
#include "hw/acpi/aml-build.h"
#define ACPI_BUILD_ALIGN_SIZE 0x1000
#define ACPI_BUILD_TABLE_SIZE 0x20000
#ifdef DEBUG_ACPI_BUILD
#define ACPI_BUILD_DPRINTF(fmt, ...) \
do {printf("ACPI_BUILD: " fmt, ## __VA_ARGS__); } while (0)
#else
#define ACPI_BUILD_DPRINTF(fmt, ...)
#endif
/* build FADT */
static void init_common_fadt_data(AcpiFadtData *data)
{
AcpiFadtData fadt = {
/* 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 = VIRT_GED_REG_ADDR + ACPI_GED_REG_SLEEP_CTL,
},
.sleep_sts = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = VIRT_GED_REG_ADDR + 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 = VIRT_GED_REG_ADDR + ACPI_GED_REG_RESET,
},
.reset_val = ACPI_GED_RESET_VALUE,
};
*data = fadt;
}
static void acpi_align_size(GArray *blob, unsigned align)
{
/*
* Align size to multiple of given size. This reduces the chance
* we need to change size in the future (breaking cross version migration).
*/
g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
}
/* build FACS */
static void
build_facs(GArray *table_data)
{
const char *sig = "FACS";
const uint8_t reserved[40] = {};
g_array_append_vals(table_data, sig, 4); /* Signature */
build_append_int_noprefix(table_data, 64, 4); /* Length */
build_append_int_noprefix(table_data, 0, 4); /* Hardware Signature */
build_append_int_noprefix(table_data, 0, 4); /* Firmware Waking Vector */
build_append_int_noprefix(table_data, 0, 4); /* Global Lock */
build_append_int_noprefix(table_data, 0, 4); /* Flags */
g_array_append_vals(table_data, reserved, 40); /* Reserved */
}
/* build MADT */
static void
build_madt(GArray *table_data, BIOSLinker *linker, LoongArchMachineState *lams)
{
MachineState *ms = MACHINE(lams);
int i;
AcpiTable table = { .sig = "APIC", .rev = 1, .oem_id = lams->oem_id,
.oem_table_id = lams->oem_table_id };
acpi_table_begin(&table, table_data);
/* Local APIC Address */
build_append_int_noprefix(table_data, 0, 4);
build_append_int_noprefix(table_data, 1 /* PCAT_COMPAT */, 4); /* Flags */
for (i = 0; i < ms->smp.cpus; i++) {
/* Processor Core Interrupt Controller Structure */
build_append_int_noprefix(table_data, 17, 1); /* Type */
build_append_int_noprefix(table_data, 15, 1); /* Length */
build_append_int_noprefix(table_data, 1, 1); /* Version */
build_append_int_noprefix(table_data, i + 1, 4); /* ACPI Processor ID */
build_append_int_noprefix(table_data, i, 4); /* Core ID */
build_append_int_noprefix(table_data, 1, 4); /* Flags */
}
/* Extend I/O Interrupt Controller Structure */
build_append_int_noprefix(table_data, 20, 1); /* Type */
build_append_int_noprefix(table_data, 13, 1); /* Length */
build_append_int_noprefix(table_data, 1, 1); /* Version */
build_append_int_noprefix(table_data, 3, 1); /* Cascade */
build_append_int_noprefix(table_data, 0, 1); /* Node */
build_append_int_noprefix(table_data, 0xffff, 8); /* Node map */
/* MSI Interrupt Controller Structure */
build_append_int_noprefix(table_data, 21, 1); /* Type */
build_append_int_noprefix(table_data, 19, 1); /* Length */
build_append_int_noprefix(table_data, 1, 1); /* Version */
build_append_int_noprefix(table_data, VIRT_PCH_MSI_ADDR_LOW, 8);/* Address */
build_append_int_noprefix(table_data, 0x40, 4); /* Start */
build_append_int_noprefix(table_data, 0xc0, 4); /* Count */
/* Bridge I/O Interrupt Controller Structure */
build_append_int_noprefix(table_data, 22, 1); /* Type */
build_append_int_noprefix(table_data, 17, 1); /* Length */
build_append_int_noprefix(table_data, 1, 1); /* Version */
build_append_int_noprefix(table_data, VIRT_PCH_REG_BASE, 8);/* Address */
build_append_int_noprefix(table_data, 0x1000, 2); /* Size */
build_append_int_noprefix(table_data, 0, 2); /* Id */
build_append_int_noprefix(table_data, 0x40, 2); /* Base */
acpi_table_end(linker, &table);
}
/* build SRAT */
static void
build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
{
uint64_t i;
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
MachineState *ms = MACHINE(lams);
AcpiTable table = { .sig = "SRAT", .rev = 1, .oem_id = lams->oem_id,
.oem_table_id = lams->oem_table_id };
acpi_table_begin(&table, table_data);
build_append_int_noprefix(table_data, 1, 4); /* Reserved */
build_append_int_noprefix(table_data, 0, 8); /* Reserved */
for (i = 0; i < ms->smp.cpus; ++i) {
/* Processor Local APIC/SAPIC Affinity Structure */
build_append_int_noprefix(table_data, 0, 1); /* Type */
build_append_int_noprefix(table_data, 16, 1); /* Length */
/* Proximity Domain [7:0] */
build_append_int_noprefix(table_data, 0, 1);
build_append_int_noprefix(table_data, i, 1); /* APIC ID */
/* Flags, Table 5-36 */
build_append_int_noprefix(table_data, 1, 4);
build_append_int_noprefix(table_data, 0, 1); /* Local SAPIC EID */
/* Proximity Domain [31:8] */
build_append_int_noprefix(table_data, 0, 3);
build_append_int_noprefix(table_data, 0, 4); /* Reserved */
}
build_srat_memory(table_data, VIRT_LOWMEM_BASE, VIRT_LOWMEM_SIZE,
0, MEM_AFFINITY_ENABLED);
build_srat_memory(table_data, VIRT_HIGHMEM_BASE, machine->ram_size - VIRT_LOWMEM_SIZE,
0, MEM_AFFINITY_ENABLED);
if (ms->device_memory) {
build_srat_memory(table_data, ms->device_memory->base,
memory_region_size(&ms->device_memory->mr),
0, MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
}
acpi_table_end(linker, &table);
}
typedef
struct AcpiBuildState {
/* Copy of table in RAM (for patching). */
MemoryRegion *table_mr;
/* Is table patched? */
uint8_t patched;
void *rsdp;
MemoryRegion *rsdp_mr;
MemoryRegion *linker_mr;
} AcpiBuildState;
static void build_uart_device_aml(Aml *table)
{
Aml *dev;
Aml *crs;
Aml *pkg0, *pkg1, *pkg2;
uint32_t uart_irq = VIRT_UART_IRQ;
Aml *scope = aml_scope("_SB");
dev = aml_device("COMA");
aml_append(dev, aml_name_decl("_HID", aml_string("PNP0501")));
aml_append(dev, aml_name_decl("_UID", aml_int(0)));
aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
crs = aml_resource_template();
aml_append(crs,
aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_NON_CACHEABLE, AML_READ_WRITE,
0, VIRT_UART_BASE, VIRT_UART_BASE + VIRT_UART_SIZE - 1,
0, VIRT_UART_SIZE));
aml_append(crs, aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
AML_SHARED, &uart_irq, 1));
aml_append(dev, aml_name_decl("_CRS", crs));
pkg0 = aml_package(0x2);
aml_append(pkg0, aml_int(0x05F5E100));
aml_append(pkg0, aml_string("clock-frenquency"));
pkg1 = aml_package(0x1);
aml_append(pkg1, pkg0);
pkg2 = aml_package(0x2);
aml_append(pkg2, aml_touuid("DAFFD814-6EBA-4D8C-8A91-BC9BBF4AA301"));
aml_append(pkg2, pkg1);
aml_append(dev, aml_name_decl("_DSD", pkg2));
aml_append(scope, dev);
aml_append(table, scope);
}
static void
build_la_ged_aml(Aml *dsdt, MachineState *machine)
{
uint32_t event;
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
build_ged_aml(dsdt, "\\_SB."GED_DEVICE,
HOTPLUG_HANDLER(lams->acpi_ged),
VIRT_SCI_IRQ, AML_SYSTEM_MEMORY,
VIRT_GED_EVT_ADDR);
event = object_property_get_uint(OBJECT(lams->acpi_ged),
"ged-event", &error_abort);
if (event & ACPI_GED_MEM_HOTPLUG_EVT) {
build_memory_hotplug_aml(dsdt, machine->ram_slots, "\\_SB", NULL,
AML_SYSTEM_MEMORY,
VIRT_GED_MEM_ADDR);
}
}
static void build_pci_device_aml(Aml *scope, LoongArchMachineState *lams)
{
struct GPEXConfig cfg = {
.mmio64.base = VIRT_PCI_MEM_BASE,
.mmio64.size = VIRT_PCI_MEM_SIZE,
.pio.base = VIRT_PCI_IO_BASE,
.pio.size = VIRT_PCI_IO_SIZE,
.ecam.base = VIRT_PCI_CFG_BASE,
.ecam.size = VIRT_PCI_CFG_SIZE,
.irq = PCH_PIC_IRQ_OFFSET + VIRT_DEVICE_IRQS,
.bus = lams->pci_bus,
};
acpi_dsdt_add_gpex(scope, &cfg);
}
#ifdef CONFIG_TPM
static void acpi_dsdt_add_tpm(Aml *scope, LoongArchMachineState *vms)
{
PlatformBusDevice *pbus = PLATFORM_BUS_DEVICE(vms->platform_bus_dev);
hwaddr pbus_base = VIRT_PLATFORM_BUS_BASEADDRESS;
SysBusDevice *sbdev = SYS_BUS_DEVICE(tpm_find());
MemoryRegion *sbdev_mr;
hwaddr tpm_base;
if (!sbdev) {
return;
}
tpm_base = platform_bus_get_mmio_addr(pbus, sbdev, 0);
assert(tpm_base != -1);
tpm_base += pbus_base;
sbdev_mr = sysbus_mmio_get_region(sbdev, 0);
Aml *dev = aml_device("TPM0");
aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101")));
aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device")));
aml_append(dev, aml_name_decl("_UID", aml_int(0)));
Aml *crs = aml_resource_template();
aml_append(crs,
aml_memory32_fixed(tpm_base,
(uint32_t)memory_region_size(sbdev_mr),
AML_READ_WRITE));
aml_append(dev, aml_name_decl("_CRS", crs));
aml_append(scope, dev);
}
#endif
/* build DSDT */
static void
build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine)
{
Aml *dsdt, *scope, *pkg;
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
AcpiTable table = { .sig = "DSDT", .rev = 1, .oem_id = lams->oem_id,
.oem_table_id = lams->oem_table_id };
acpi_table_begin(&table, table_data);
dsdt = init_aml_allocator();
build_uart_device_aml(dsdt);
build_pci_device_aml(dsdt, lams);
build_la_ged_aml(dsdt, machine);
#ifdef CONFIG_TPM
acpi_dsdt_add_tpm(dsdt, lams);
#endif
/* 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);
acpi_table_end(linker, &table);
free_aml_allocator();
}
static void acpi_build(AcpiBuildTables *tables, MachineState *machine)
{
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
GArray *table_offsets;
AcpiFadtData fadt_data;
unsigned facs, rsdt, dsdt;
uint8_t *u;
GArray *tables_blob = tables->table_data;
init_common_fadt_data(&fadt_data);
table_offsets = g_array_new(false, true, sizeof(uint32_t));
ACPI_BUILD_DPRINTF("init ACPI tables\n");
bios_linker_loader_alloc(tables->linker,
ACPI_BUILD_TABLE_FILE, tables_blob,
64, false);
/*
* FACS is pointed to by FADT.
* We place it first since it's the only table that has alignment
* requirements.
*/
facs = tables_blob->len;
build_facs(tables_blob);
/* DSDT is pointed to by FADT */
dsdt = tables_blob->len;
build_dsdt(tables_blob, tables->linker, machine);
/* ACPI tables pointed to by RSDT */
acpi_add_table(table_offsets, tables_blob);
fadt_data.facs_tbl_offset = &facs;
fadt_data.dsdt_tbl_offset = &dsdt;
fadt_data.xdsdt_tbl_offset = &dsdt;
build_fadt(tables_blob, tables->linker, &fadt_data,
lams->oem_id, lams->oem_table_id);
acpi_add_table(table_offsets, tables_blob);
build_madt(tables_blob, tables->linker, lams);
acpi_add_table(table_offsets, tables_blob);
build_srat(tables_blob, tables->linker, machine);
acpi_add_table(table_offsets, tables_blob);
{
AcpiMcfgInfo mcfg = {
.base = cpu_to_le64(VIRT_PCI_CFG_BASE),
.size = cpu_to_le64(VIRT_PCI_CFG_SIZE),
};
build_mcfg(tables_blob, tables->linker, &mcfg, lams->oem_id,
lams->oem_table_id);
}
#ifdef CONFIG_TPM
/* TPM info */
if (tpm_get_version(tpm_find()) == TPM_VERSION_2_0) {
acpi_add_table(table_offsets, tables_blob);
build_tpm2(tables_blob, tables->linker,
tables->tcpalog, lams->oem_id,
lams->oem_table_id);
}
#endif
/* Add tables supplied by user (if any) */
for (u = acpi_table_first(); u; u = acpi_table_next(u)) {
unsigned len = acpi_table_len(u);
acpi_add_table(table_offsets, tables_blob);
g_array_append_vals(tables_blob, u, len);
}
/* RSDT is pointed to by RSDP */
rsdt = tables_blob->len;
build_rsdt(tables_blob, tables->linker, table_offsets,
lams->oem_id, lams->oem_table_id);
/* RSDP is in FSEG memory, so allocate it separately */
{
AcpiRsdpData rsdp_data = {
.revision = 0,
.oem_id = lams->oem_id,
.xsdt_tbl_offset = NULL,
.rsdt_tbl_offset = &rsdt,
};
build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
}
/*
* The align size is 128, warn if 64k is not enough therefore
* the align size could be resized.
*/
if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) {
warn_report("ACPI table size %u exceeds %d bytes,"
" migration may not work",
tables_blob->len, ACPI_BUILD_TABLE_SIZE / 2);
error_printf("Try removing CPUs, NUMA nodes, memory slots"
" or PCI bridges.");
}
acpi_align_size(tables->linker->cmd_blob, ACPI_BUILD_ALIGN_SIZE);
/* Cleanup memory that's no longer used. */
g_array_free(table_offsets, true);
}
static void acpi_ram_update(MemoryRegion *mr, GArray *data)
{
uint32_t size = acpi_data_len(data);
/*
* Make sure RAM size is correct - in case it got changed
* e.g. by migration
*/
memory_region_ram_resize(mr, size, &error_abort);
memcpy(memory_region_get_ram_ptr(mr), data->data, size);
memory_region_set_dirty(mr, 0, size);
}
static void acpi_build_update(void *build_opaque)
{
AcpiBuildState *build_state = build_opaque;
AcpiBuildTables tables;
/* No state to update or already patched? Nothing to do. */
if (!build_state || build_state->patched) {
return;
}
build_state->patched = 1;
acpi_build_tables_init(&tables);
acpi_build(&tables, MACHINE(qdev_get_machine()));
acpi_ram_update(build_state->table_mr, tables.table_data);
acpi_ram_update(build_state->rsdp_mr, tables.rsdp);
acpi_ram_update(build_state->linker_mr, tables.linker->cmd_blob);
acpi_build_tables_cleanup(&tables, true);
}
static void acpi_build_reset(void *build_opaque)
{
AcpiBuildState *build_state = build_opaque;
build_state->patched = 0;
}
static const VMStateDescription vmstate_acpi_build = {
.name = "acpi_build",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(patched, AcpiBuildState),
VMSTATE_END_OF_LIST()
},
};
void loongarch_acpi_setup(LoongArchMachineState *lams)
{
AcpiBuildTables tables;
AcpiBuildState *build_state;
if (!lams->fw_cfg) {
ACPI_BUILD_DPRINTF("No fw cfg. Bailing out.\n");
return;
}
if (!loongarch_is_acpi_enabled(lams)) {
ACPI_BUILD_DPRINTF("ACPI disabled. Bailing out.\n");
return;
}
build_state = g_malloc0(sizeof *build_state);
acpi_build_tables_init(&tables);
acpi_build(&tables, MACHINE(lams));
/* Now expose it all to Guest */
build_state->table_mr = acpi_add_rom_blob(acpi_build_update,
build_state, tables.table_data,
ACPI_BUILD_TABLE_FILE);
assert(build_state->table_mr != NULL);
build_state->linker_mr =
acpi_add_rom_blob(acpi_build_update, build_state,
tables.linker->cmd_blob, ACPI_BUILD_LOADER_FILE);
build_state->rsdp_mr = acpi_add_rom_blob(acpi_build_update,
build_state, tables.rsdp,
ACPI_BUILD_RSDP_FILE);
qemu_register_reset(acpi_build_reset, build_state);
acpi_build_reset(build_state);
vmstate_register(NULL, 0, &vmstate_acpi_build, build_state);
/*
* Cleanup tables but don't free the memory: we track it
* in build_state.
*/
acpi_build_tables_cleanup(&tables, false);
}
