[PATCH-for-9.1,v2,06/21] hw/acpi/ich9: Remove dead code related to 'acpi_memory_hotplug'

Commit Message

Philippe Mathieu-Daudé March 27, 2024, 9:51 a.m. UTC

acpi_memory_hotplug::is_enabled is set to %true once via
ich9_lpc_initfn() -> ich9_pm_add_properties(). No need to
check it, so remove now dead code.

Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 hw/acpi/ich9.c | 28 ++++++----------------------
 1 file changed, 6 insertions(+), 22 deletions(-)

Comments

Zhao Liu March 28, 2024, 4:19 a.m. UTC | #1

On Wed, Mar 27, 2024 at 10:51:08AM +0100, Philippe Mathieu-Daudé wrote:
> Date: Wed, 27 Mar 2024 10:51:08 +0100
> From: Philippe Mathieu-Daudé <[e-mail]>
> Subject: [PATCH-for-9.1 v2 06/21] hw/acpi/ich9: Remove dead code related to
>  'acpi_memory_hotplug'
> X-Mailer: git-send-email 2.41.0
> 
> acpi_memory_hotplug::is_enabled is set to %true once via
> ich9_lpc_initfn() -> ich9_pm_add_properties(). No need to
> check it, so remove now dead code.
> 
> Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
> ---
>  hw/acpi/ich9.c | 28 ++++++----------------------
>  1 file changed, 6 insertions(+), 22 deletions(-)

Reviewed-by: Zhao Liu <[e-mail]>

Patch

diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 9b605af21a..02d8546bd3 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -153,17 +153,10 @@  static int ich9_pm_post_load(void *opaque, int version_id)
      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
  }
 
-static bool vmstate_test_use_memhp(void *opaque)
-{
-    ICH9LPCPMRegs *s = opaque;
-    return s->acpi_memory_hotplug.is_enabled;
-}
-
 static const VMStateDescription vmstate_memhp_state = {
     .name = "ich9_pm/memhp",
     .version_id = 1,
     .minimum_version_id = 1,
-    .needed = vmstate_test_use_memhp,
     .fields = (const VMStateField[]) {
         VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, ICH9LPCPMRegs),
         VMSTATE_END_OF_LIST()
@@ -335,11 +328,9 @@  void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm, qemu_irq sci_irq)
     legacy_acpi_cpu_hotplug_init(pci_address_space_io(lpc_pci),
         OBJECT(lpc_pci), &pm->gpe_cpu, ICH9_CPU_HOTPLUG_IO_BASE);
 
-    if (pm->acpi_memory_hotplug.is_enabled) {
-        acpi_memory_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
-                                 &pm->acpi_memory_hotplug,
-                                 ACPI_MEMORY_HOTPLUG_BASE);
-    }
+    acpi_memory_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
+                             &pm->acpi_memory_hotplug,
+                             ACPI_MEMORY_HOTPLUG_BASE);
 }
 
 static void ich9_pm_get_gpe0_blk(Object *obj, Visitor *v, const char *name,
@@ -460,12 +451,7 @@  void ich9_pm_device_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
         return;
     }
 
-    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) &&
-        !lpc->pm.acpi_memory_hotplug.is_enabled) {
-        error_setg(errp,
-                   "memory hotplug is not enabled: %s.memory-hotplug-support "
-                   "is not set", object_get_typename(OBJECT(lpc)));
-    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+    if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
         uint64_t negotiated = lpc->smi_negotiated_features;
 
         if (negotiated & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT) &&
@@ -509,8 +495,7 @@  void ich9_pm_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 {
     ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
 
-    if (lpc->pm.acpi_memory_hotplug.is_enabled &&
-        object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
         acpi_memory_unplug_request_cb(hotplug_dev,
                                       &lpc->pm.acpi_memory_hotplug, dev,
                                       errp);
@@ -545,8 +530,7 @@  void ich9_pm_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
 {
     ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
 
-    if (lpc->pm.acpi_memory_hotplug.is_enabled &&
-        object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
         acpi_memory_unplug_cb(&lpc->pm.acpi_memory_hotplug, dev, errp);
     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
                !lpc->pm.cpu_hotplug_legacy) {