On Tue, 12 Jul 2022 16:32:05 +0800
Xiaojuan Yang <yangxiaoj...@loongson.cn> wrote:
> Loongarch virt machine uses general hardware reduces acpi method, rather
> than LS7A acpi device. Now only power management function is used in
> acpi ged device, memory hotplug will be added later. Also acpi tables
> such as RSDP/RSDT/FADT etc.
>
> The acpi table has submited to acpi spec, and will release soon.
>
> Signed-off-by: Xiaojuan Yang <yangxiaoj...@loongson.cn>
> ---
> hw/loongarch/Kconfig | 2 +
> hw/loongarch/acpi-build.c | 609 ++++++++++++++++++++++++++++++++++++
> hw/loongarch/loongson3.c | 78 ++++-
> hw/loongarch/meson.build | 1 +
> include/hw/loongarch/virt.h | 13 +
> include/hw/pci-host/ls7a.h | 4 +
> 6 files changed, 704 insertions(+), 3 deletions(-)
> create mode 100644 hw/loongarch/acpi-build.c
>
> diff --git a/hw/loongarch/Kconfig b/hw/loongarch/Kconfig
> index 610552e522..a99aa387c3 100644
> --- a/hw/loongarch/Kconfig
> +++ b/hw/loongarch/Kconfig
> @@ -15,3 +15,5 @@ config LOONGARCH_VIRT
> select LOONGARCH_EXTIOI
> select LS7A_RTC
> select SMBIOS
> + select ACPI_PCI
> + select ACPI_HW_REDUCED
> diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c
> new file mode 100644
> index 0000000000..b95b83b079
> --- /dev/null
> +++ b/hw/loongarch/acpi-build.c
[...]
Most of the following code copied from x86 which is needlessly
complicated for loongarch wich doesn't have all that legacy to care about,
see ARM's variant virt_acpi_setup() for a cleaner example and
drop not needed parts.
> +static void acpi_build(AcpiBuildTables *tables, MachineState *machine)
> +{
> + LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
> + GArray *table_offsets;
> + AcpiFadtData fadt_data;
> + unsigned facs, rsdt, fadt, dsdt;
> + uint8_t *u;
> + size_t aml_len = 0;
> + 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);
> +
> + /*
> + * Count the size of the DSDT, we will need it for
> + * legacy sizing of ACPI tables.
> + */
> + aml_len += tables_blob->len - dsdt;
> +
> + /* ACPI tables pointed to by RSDT */
> + fadt = tables_blob->len;
> + 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);
> + aml_len += tables_blob->len - fadt;
> +
> + 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(LS_PCIECFG_BASE),
> + .size = cpu_to_le64(LS_PCIECFG_SIZE),
> + };
> + build_mcfg(tables_blob, tables->linker, &mcfg, lams->oem_id,
> + lams->oem_table_id);
> + }
> +
> + /* 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);
> +}
[...]
