[Qemu-arm] [PATCH v2 02/11] hw/acpi: Make ACPI IO address space configurable

[Shameer Kolothum]

This is in preparation for adding support for ARM64 platforms
where it doesn't use port mapped IO for ACPI IO space.

Signed-off-by: Shameer Kolothum <address@hidden>
---
 hw/acpi/memory_hotplug.c         | 22 ++++++++++++++--------
 hw/i386/acpi-build.c             |  3 ++-
 include/hw/acpi/memory_hotplug.h |  5 +++--
 3 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index a6beb10..77ff0af 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -8,7 +8,7 @@
 #include "qapi/error.h"
 #include "qapi/qapi-events-misc.h"
 
-static uint16_t memhp_io_base;
+static hwaddr memhp_io_base;
 
 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
 {
@@ -182,7 +182,7 @@ static const MemoryRegionOps acpi_memory_hotplug_ops = {
 };
 
 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
-                              MemHotplugState *state, uint16_t io_base)
+                              MemHotplugState *state, hwaddr io_base)
 {
     MachineState *machine = MACHINE(qdev_get_machine());
 
@@ -315,7 +315,8 @@ const VMStateDescription vmstate_memory_hotplug = {
 
 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
                               const char *res_root,
-                              const char *event_handler_method)
+                              const char *event_handler_method,
+                              AmlRegionSpace rs)
 {
     int i;
     Aml *ifctx;
@@ -338,14 +339,19 @@ void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 
         crs = aml_resource_template();
-        aml_append(crs,
-            aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
-                   MEMORY_HOTPLUG_IO_LEN)
-        );
+        if (rs == AML_SYSTEM_IO) {
+            aml_append(crs,
+                aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
+                       MEMORY_HOTPLUG_IO_LEN)
+            );
+        } else {
+            aml_append(crs, aml_memory32_fixed(memhp_io_base,
+                            MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
+        }
         aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 
         aml_append(mem_ctrl_dev, aml_operation_region(
-            MEMORY_HOTPLUG_IO_REGION, AML_SYSTEM_IO,
+            MEMORY_HOTPLUG_IO_REGION, rs,
             aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
         );
 
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 622ccb9..d9b554f 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1852,7 +1852,8 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
         build_cpus_aml(dsdt, machine, opts, pm->cpu_hp_io_base,
                        "\\_SB.PCI0", "\\_GPE._E02");
     }
-    build_memory_hotplug_aml(dsdt, nr_mem, "\\_SB.PCI0", "\\_GPE._E03");
+    build_memory_hotplug_aml(dsdt, nr_mem, "\\_SB.PCI0",
+                             "\\_GPE._E03", AML_SYSTEM_IO);
 
     scope =  aml_scope("_GPE");
     {
diff --git a/include/hw/acpi/memory_hotplug.h b/include/hw/acpi/memory_hotplug.h
index fbfcbe6..52f9027 100644
--- a/include/hw/acpi/memory_hotplug.h
+++ b/include/hw/acpi/memory_hotplug.h
@@ -55,7 +55,7 @@ typedef struct MemHotplugState {
 } MemHotplugState;
 
 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
-                              MemHotplugState *state, uint16_t io_base);
+                              MemHotplugState *state, hwaddr io_base);
 
 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
                          DeviceState *dev, Error **errp);
@@ -74,5 +74,6 @@ void acpi_memory_ospm_status(MemHotplugState *mem_st, 
ACPIOSTInfoList ***list);
 
 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
                               const char *res_root,
-                              const char *event_handler_method);
+                              const char *event_handler_method,
+                              AmlRegionSpace rs);
 #endif
-- 
2.7.4