memhp: don't generate memory hotplug AML if it's not enabled/supported

That reduces DSDT by 910 bytes when memory hotplug
isn't enabled.

While doing so drop intermediate variables/arguments
passing around ACPI_MEMORY_HOTPLUG_IO_LEN and making
it local to memory_hotplug.c, hardcoding it there as
it can't change.

Also don't pass around ACPI_MEMORY_HOTPLUG_BASE through
intermediate variables/arguments where it's not needed.
Instead initialize in module static variable when MMIO
region is mapped and use that within memory_hotplug.c
whenever it's required.
That way MMIO base specified only at one place and AML
with MMIO would always use the same value.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/include/hw/acpi/memory_hotplug.h b/include/hw/acpi/memory_hotplug.h
index 91d40459b3..db8ebc9cea 100644
--- a/include/hw/acpi/memory_hotplug.h
+++ b/include/hw/acpi/memory_hotplug.h
@@ -30,7 +30,7 @@ typedef struct MemHotplugState {
 } MemHotplugState;
 
 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
-                              MemHotplugState *state);
+                              MemHotplugState *state, uint16_t io_base);
 
 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
                          DeviceState *dev, Error **errp);
@@ -48,7 +48,6 @@ extern const VMStateDescription vmstate_memory_hotplug;
 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list);
 
 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
-                              uint16_t io_base, uint16_t io_len,
                               const char *res_root,
                               const char *event_handler_method);
 #endif