On 05/03/2024 14.42, Philippe Mathieu-Daudé wrote:
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@xxxxxxxxxx>
---
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.
I think you could remove this "All this is for ..." sentence now, too?
Thomas
*/
- 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);
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