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-rw-r--r--hw/i386/acpi-microvm.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c
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+/* 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 "qemu/cutils.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 "hw/virtio/virtio-mmio.h"
+
+#include "acpi-common.h"
+#include "acpi-microvm.h"
+
+static void acpi_dsdt_add_virtio(Aml *scope,
+ MicrovmMachineState *mms)
+{
+ gchar *separator;
+ long int index;
+ BusState *bus;
+ BusChild *kid;
+
+ bus = sysbus_get_default();
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ DeviceState *dev = kid->child;
+ Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
+
+ if (obj) {
+ VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
+ VirtioBusState *mmio_virtio_bus = &mmio->bus;
+ BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
+
+ if (QTAILQ_EMPTY(&mmio_bus->children)) {
+ continue;
+ }
+ separator = g_strrstr(mmio_bus->name, ".");
+ if (!separator) {
+ continue;
+ }
+ if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
+ continue;
+ }
+
+ uint32_t irq = mms->virtio_irq_base + index;
+ hwaddr base = VIRTIO_MMIO_BASE + index * 512;
+ hwaddr size = 512;
+
+ Aml *dev = aml_device("VR%02u", (unsigned)index);
+ aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
+ aml_append(dev, aml_name_decl("_UID", aml_int(index)));
+ aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
+
+ Aml *crs = aml_resource_template();
+ aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
+ aml_append(crs,
+ aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
+ AML_EXCLUSIVE, &irq, 1));
+ aml_append(dev, aml_name_decl("_CRS", crs));
+ aml_append(scope, dev);
+ }
+ }
+}
+
+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, x86ms->acpi_dev,
+ GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
+ acpi_dsdt_add_power_button(sb_scope);
+ acpi_dsdt_add_virtio(sb_scope, mms);
+ 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);
+ X86MachineState *x86ms = X86_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),
+ ACPI_DEVICE_IF(x86ms->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);
+}
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-16 23:26:31 +0000