RISC-V also needs to use the same code to create fw_cfg in DSDT. So,
avoid code duplication by moving the code in arm and riscv to a device
specific file.

Suggested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
---
 hw/arm/virt-acpi-build.c       | 19 ++-----------------
 hw/nvram/fw_cfg-acpi.c         | 23 +++++++++++++++++++++++
 hw/nvram/meson.build           |  1 +
 hw/riscv/virt-acpi-build.c     | 19 ++-----------------
 include/hw/nvram/fw_cfg_acpi.h | 15 +++++++++++++++
 5 files changed, 43 insertions(+), 34 deletions(-)
 create mode 100644 hw/nvram/fw_cfg-acpi.c
 create mode 100644 include/hw/nvram/fw_cfg_acpi.h

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 9ce136cd88..dd2e95f0ea 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -35,7 +35,7 @@
 #include "target/arm/cpu.h"
 #include "hw/acpi/acpi-defs.h"
 #include "hw/acpi/acpi.h"
-#include "hw/nvram/fw_cfg.h"
+#include "hw/nvram/fw_cfg_acpi.h"
 #include "hw/acpi/bios-linker-loader.h"
 #include "hw/acpi/aml-build.h"
 #include "hw/acpi/utils.h"
@@ -94,21 +94,6 @@ static void acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
     aml_append(scope, dev);
 }
 
-static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry *fw_cfg_memmap)
-{
-    Aml *dev = aml_device("FWCF");
-    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
-    /* device present, functioning, decoding, not shown in UI */
-    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
-    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
-
-    Aml *crs = aml_resource_template();
-    aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
-                                       fw_cfg_memmap->size, AML_READ_WRITE));
-    aml_append(dev, aml_name_decl("_CRS", crs));
-    aml_append(scope, dev);
-}
-
 static void acpi_dsdt_add_flash(Aml *scope, const MemMapEntry *flash_memmap)
 {
     Aml *dev, *crs;
@@ -864,7 +849,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
     if (vmc->acpi_expose_flash) {
         acpi_dsdt_add_flash(scope, &memmap[VIRT_FLASH]);
     }
-    acpi_dsdt_add_fw_cfg(scope, &memmap[VIRT_FW_CFG]);
+    fw_cfg_acpi_dsdt_add(scope, &memmap[VIRT_FW_CFG]);
     acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
                     (irqmap[VIRT_MMIO] + ARM_SPI_BASE), NUM_VIRTIO_TRANSPORTS);
     acpi_dsdt_add_pci(scope, memmap, irqmap[VIRT_PCIE] + ARM_SPI_BASE, vms);
diff --git a/hw/nvram/fw_cfg-acpi.c b/hw/nvram/fw_cfg-acpi.c
new file mode 100644
index 0000000000..4e48baeaa0
--- /dev/null
+++ b/hw/nvram/fw_cfg-acpi.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Add fw_cfg device in DSDT
+ *
+ */
+
+#include "hw/nvram/fw_cfg_acpi.h"
+#include "hw/acpi/aml-build.h"
+
+void fw_cfg_acpi_dsdt_add(Aml *scope, const MemMapEntry *fw_cfg_memmap)
+{
+    Aml *dev = aml_device("FWCF");
+    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
+    /* device present, functioning, decoding, not shown in UI */
+    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
+    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
+
+    Aml *crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
+                                       fw_cfg_memmap->size, AML_READ_WRITE));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
diff --git a/hw/nvram/meson.build b/hw/nvram/meson.build
index 75e415b1a0..4996c72456 100644
--- a/hw/nvram/meson.build
+++ b/hw/nvram/meson.build
@@ -17,3 +17,4 @@ system_ss.add(when: 'CONFIG_XLNX_EFUSE_ZYNQMP', if_true: files(
 system_ss.add(when: 'CONFIG_XLNX_BBRAM', if_true: files('xlnx-bbram.c'))
 
 specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr_nvram.c'))
+specific_ss.add(when: 'CONFIG_ACPI', if_true: files('fw_cfg-acpi.c'))
diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c
index 7331248f59..d8772c2821 100644
--- a/hw/riscv/virt-acpi-build.c
+++ b/hw/riscv/virt-acpi-build.c
@@ -28,6 +28,7 @@
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/aml-build.h"
 #include "hw/acpi/utils.h"
+#include "hw/nvram/fw_cfg_acpi.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "sysemu/reset.h"
@@ -97,22 +98,6 @@ static void acpi_dsdt_add_cpus(Aml *scope, RISCVVirtState *s)
     }
 }
 
-static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry *fw_cfg_memmap)
-{
-    Aml *dev = aml_device("FWCF");
-    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
-
-    /* device present, functioning, decoding, not shown in UI */
-    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
-    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
-
-    Aml *crs = aml_resource_template();
-    aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
-                                       fw_cfg_memmap->size, AML_READ_WRITE));
-    aml_append(dev, aml_name_decl("_CRS", crs));
-    aml_append(scope, dev);
-}
-
 /* RHCT Node[N] starts at offset 56 */
 #define RHCT_NODE_ARRAY_OFFSET 56
 
@@ -226,7 +211,7 @@ static void build_dsdt(GArray *table_data,
     scope = aml_scope("\\_SB");
     acpi_dsdt_add_cpus(scope, s);
 
-    acpi_dsdt_add_fw_cfg(scope, &memmap[VIRT_FW_CFG]);
+    fw_cfg_acpi_dsdt_add(scope, &memmap[VIRT_FW_CFG]);
 
     aml_append(dsdt, scope);
 
diff --git a/include/hw/nvram/fw_cfg_acpi.h b/include/hw/nvram/fw_cfg_acpi.h
new file mode 100644
index 0000000000..b6553d86fc
--- /dev/null
+++ b/include/hw/nvram/fw_cfg_acpi.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ACPI support for fw_cfg
+ *
+ */
+
+#ifndef FW_CFG_ACPI_H
+#define FW_CFG_ACPI_H
+
+#include "qemu/osdep.h"
+#include "exec/hwaddr.h"
+
+void fw_cfg_acpi_dsdt_add(Aml *scope, const MemMapEntry *fw_cfg_memmap);
+
+#endif
-- 
2.39.2