Re: [PATCH-for-9.1 v2 16/21] hw/i386/pc: Remove PCMachineClass::resizable_acpi_blob

2024-03-27 Thread Zhao Liu
On Wed, Mar 27, 2024 at 10:51:18AM +0100, Philippe Mathieu-Daudé wrote:
> Date: Wed, 27 Mar 2024 10:51:18 +0100
> From: Philippe Mathieu-Daudé 
> Subject: [PATCH-for-9.1 v2 16/21] hw/i386/pc: Remove
>  PCMachineClass::resizable_acpi_blob
> X-Mailer: git-send-email 2.41.0
> 
> PCMachineClass::resizable_acpi_blob was only used by the
> pc-i440fx-2.2 machine, which got removed. It is now always
> true. Remove it, simplifying acpi_build().
> 
> Signed-off-by: Philippe Mathieu-Daudé 
> ---
>  include/hw/i386/pc.h |  3 ---
>  hw/i386/acpi-build.c | 10 --
>  hw/i386/pc.c |  1 -
>  3 files changed, 14 deletions(-)

Reviewed-by: Zhao Liu 




[PATCH-for-9.1 v2 16/21] hw/i386/pc: Remove PCMachineClass::resizable_acpi_blob

2024-03-27 Thread Philippe Mathieu-Daudé
PCMachineClass::resizable_acpi_blob was only used by the
pc-i440fx-2.2 machine, which got removed. It is now always
true. Remove it, simplifying acpi_build().

Signed-off-by: Philippe Mathieu-Daudé 
---
 include/hw/i386/pc.h |  3 ---
 hw/i386/acpi-build.c | 10 --
 hw/i386/pc.c |  1 -
 3 files changed, 14 deletions(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index df97df6ca7..10a8ffa0de 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -124,9 +124,6 @@ struct PCMachineClass {
 /* create kvmclock device even when KVM PV features are not exposed */
 bool kvmclock_create_always;
 
-/* resizable acpi blob compat */
-bool resizable_acpi_blob;
-
 /*
  * whether the machine type implements broken 32-bit address space bound
  * check for memory.
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index a6f8203460..ab2d4d8dcb 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2688,16 +2688,6 @@ void acpi_build(AcpiBuildTables *tables, MachineState 
*machine)
  * keep the table size stable for all (max_cpus, max_memory_slots)
  * combinations.
  */
-/* 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);
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index c37d813af0..ae2d220269 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1753,7 +1753,6 @@ static void pc_machine_class_init(ObjectClass *oc, void 
*data)
 pcmc->acpi_data_size = 0x2 + 0x8000;
 pcmc->pvh_enabled = true;
 pcmc->kvmclock_create_always = true;
-pcmc->resizable_acpi_blob = true;
 x86mc->apic_xrupt_override = true;
 assert(!mc->get_hotplug_handler);
 mc->get_hotplug_handler = pc_get_hotplug_handler;
-- 
2.41.0