Re: [PATCH-for-9.1 05/18] hw/i386/acpi: Remove PCMachineClass::legacy_acpi_table_size

PCMachineClass::legacy_acpi_table_size was only used by the pc-i440fx-2.0 machine, which got removed. Remove it and simplify acpi_build(). Signed-off-by: Philippe Mathieu-Daudé <philmd(a)linaro.org&gt; --- include/hw/i386/pc.h | 1 - hw/i386/acpi-build.c | 60 +++++++++----------------------------------- 2 files changed, 12 insertions(+), 49 deletions(-) diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 3360ca2307..758d670a36 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -103,7 +103,6 @@ struct PCMachineClass { /* ACPI compat: */ bool has_acpi_build; bool rsdp_in_ram; - int legacy_acpi_table_size; unsigned acpi_data_size; int pci_root_uid; diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 15242b9096..8c7fad92e9 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -2496,13 +2496,12 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine) X86MachineState *x86ms = X86_MACHINE(machine); DeviceState *iommu = pcms->iommu; GArray *table_offsets; - unsigned facs, dsdt, rsdt, fadt; + unsigned facs, dsdt, rsdt; AcpiPmInfo pm; AcpiMiscInfo misc; AcpiMcfgInfo mcfg; Range pci_hole = {}, pci_hole64 = {}; uint8_t *u; - size_t aml_len = 0; GArray *tables_blob = tables->table_data; AcpiSlicOem slic_oem = { .id = NULL, .table_id = NULL }; Object *vmgenid_dev; @@ -2548,19 +2547,12 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine) build_dsdt(tables_blob, tables->linker, &pm, &misc, &pci_hole, &pci_hole64, machine); - /* Count the size of the DSDT and SSDT, 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); pm.fadt.facs_tbl_offset = &facs; pm.fadt.dsdt_tbl_offset = &dsdt; pm.fadt.xdsdt_tbl_offset = &dsdt; build_fadt(tables_blob, tables->linker, &pm.fadt, oem_id, oem_table_id); - aml_len += tables_blob->len - fadt; acpi_add_table(table_offsets, tables_blob); acpi_build_madt(tables_blob, tables->linker, x86ms, @@ -2691,49 +2683,21 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine) * too simple to be enough. 4k turned out to be too small an * alignment very soon, and in fact it is almost impossible to * keep the table size stable for all (max_cpus, max_memory_slots) - * combinations. So the table size is always 64k for pc-i440fx-2.1 - * and we give an error if the table grows beyond that limit. - * - * We still have the problem of migrating from "-M pc-i440fx-2.0". For - * that, we exploit the fact that QEMU 2.1 generates _smaller_ tables - * than 2.0 and we can always pad the smaller tables with zeros. We can - * then use the exact size of the 2.0 tables. + * combinations. * * All this is for PIIX4, since QEMU 2.0 didn't support Q35 migration.

*/ - if (pcmc->legacy_acpi_table_size) { - /* Subtracting aml_len gives the size of fixed tables. Then add the - * size of the PIIX4 DSDT/SSDT in QEMU 2.0. - */ - int legacy_aml_len = - pcmc->legacy_acpi_table_size + - ACPI_BUILD_LEGACY_CPU_AML_SIZE * x86ms->apic_id_limit; - int legacy_table_size = - ROUND_UP(tables_blob->len - aml_len + legacy_aml_len, - ACPI_BUILD_ALIGN_SIZE); - if ((tables_blob->len > legacy_table_size) && - !pcmc->resizable_acpi_blob) { - /* Should happen only with PCI bridges and -M pc-i440fx-2.0. */ - warn_report("ACPI table size %u exceeds %d bytes," - " migration may not work", - tables_blob->len, legacy_table_size); - error_printf("Try removing CPUs, NUMA nodes, memory slots" - " or PCI bridges.\n"); - } - g_array_set_size(tables_blob, legacy_table_size); - } else { - /* Make sure we have a buffer in case we need to resize the tables. */ - if ((tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) && - !pcmc->resizable_acpi_blob) { - /* As of QEMU 2.1, this fires with 160 VCPUs and 255 memory slots. */ - 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.\n"); - } - acpi_align_size(tables_blob, ACPI_BUILD_TABLE_SIZE); + /* Make sure we have a buffer in case we need to resize the tables. */ + if ((tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) && + !pcmc->resizable_acpi_blob) { + /* As of QEMU 2.1, this fires with 160 VCPUs and 255 memory slots. */ + 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.\n"); } + acpi_align_size(tables_blob, ACPI_BUILD_TABLE_SIZE); acpi_align_size(tables->linker->cmd_blob, ACPI_BUILD_ALIGN_SIZE);