pc: acpi: simplify build_legacy_cpu_hotplug_aml() signature

since IO block used by CPU hotplug is fixed size and
initialized it the same file as build_legacy_cpu_hotplug_aml()
just use ACPI_GPE_PROC_LEN directly instead of passing
it around in several files.
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NMarcel Apfelbaum <marcel@redhat.com>

hw/acpi/cpu_hotplug.c

@@ -87,7 +87,7 @@ void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner,
 }
 
 void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine,
-                                  uint16_t io_base, uint16_t io_len)
+                                  uint16_t io_base)
 {
     Aml *dev;
     Aml *crs;
@@ -226,13 +226,13 @@ void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine,
     aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
     crs = aml_resource_template();
     aml_append(crs,
-        aml_io(AML_DECODE16, io_base, io_base, 1, io_len)
+        aml_io(AML_DECODE16, io_base, io_base, 1, ACPI_GPE_PROC_LEN)
     );
     aml_append(dev, aml_name_decl("_CRS", crs));
     aml_append(sb_scope, dev);
     /* declare CPU hotplug MMIO region and PRS field to access it */
     aml_append(sb_scope, aml_operation_region(
-        "PRST", AML_SYSTEM_IO, aml_int(io_base), io_len));
+        "PRST", AML_SYSTEM_IO, aml_int(io_base), ACPI_GPE_PROC_LEN));
     field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
     aml_append(field, aml_named_field("PRS", 256));
     aml_append(sb_scope, field);

hw/i386/acpi-build.c

@@ -94,7 +94,6 @@ typedef struct AcpiPmInfo {
     uint32_t gpe0_blk_len;
     uint32_t io_base;
     uint16_t cpu_hp_io_base;
-    uint16_t cpu_hp_io_len;
     uint16_t mem_hp_io_base;
     uint16_t mem_hp_io_len;
     uint16_t pcihp_io_base;
@@ -142,7 +141,6 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
     }
     assert(obj);
 
-    pm->cpu_hp_io_len = ACPI_GPE_PROC_LEN;
     pm->mem_hp_io_base = ACPI_MEMORY_HOTPLUG_BASE;
     pm->mem_hp_io_len = ACPI_MEMORY_HOTPLUG_IO_LEN;
 
@@ -1935,8 +1933,7 @@ build_dsdt(GArray *table_data, GArray *linker,
         build_q35_pci0_int(dsdt);
     }
 
-    build_legacy_cpu_hotplug_aml(dsdt, machine, pm->cpu_hp_io_base,
-                                 pm->cpu_hp_io_len);
+    build_legacy_cpu_hotplug_aml(dsdt, machine, pm->cpu_hp_io_base);
     build_memory_hotplug_aml(dsdt, nr_mem, pm->mem_hp_io_base,
                              pm->mem_hp_io_len);
 

include/hw/acpi/cpu_hotplug.h

@@ -28,5 +28,5 @@ void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner,
                                   AcpiCpuHotplug *gpe_cpu, uint16_t base);
 
 void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine,
-                                  uint16_t io_base, uint16_t io_len);
+                                  uint16_t io_base);
 #endif