[PATCH v3 8/9] configs: qemu: add config fragment for ACPI

[Heinrich Schuchardt]

Provide a configuration fragment to enable ACPI on QEMU.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
v3:
	no change
v2:
	no change
---
 MAINTAINERS                         |  1 +
 board/emulation/configs/acpi.config |  3 +++
 doc/board/emulation/acpi.rst        | 23 +++++++++++++++++++++++
 doc/board/emulation/index.rst       |  1 +
 4 files changed, 28 insertions(+)
 create mode 100644 board/emulation/configs/acpi.config
 create mode 100644 doc/board/emulation/acpi.rst

diff --git a/MAINTAINERS b/MAINTAINERS
index 25f2bb80de..bf437b253b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -53,6 +53,7 @@ Maintainers List (try to look for most precise areas first)
 ACPI:
 M:	Simon Glass <sjg at chromium.org>
 S:	Maintained
+F:	board/emulation/configs/acpi.config
 F:	cmd/acpi.c
 F:	lib/acpi/
 
diff --git a/board/emulation/configs/acpi.config b/board/emulation/configs/acpi.config
new file mode 100644
index 0000000000..b7ed811e33
--- /dev/null
+++ b/board/emulation/configs/acpi.config
@@ -0,0 +1,3 @@
+CONFIG_CMD_QFW=y
+CONFIG_ACPI=y
+CONFIG_GENERATE_ACPI_TABLE=y
diff --git a/doc/board/emulation/acpi.rst b/doc/board/emulation/acpi.rst
new file mode 100644
index 0000000000..e1208ca51e
--- /dev/null
+++ b/doc/board/emulation/acpi.rst
@@ -0,0 +1,23 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+ACPI on QEMU
+============
+
+QEMU can provide ACPI tables on ARM, RISC-V, and x86.
+
+The following settings are needed::
+
+    CONFIG_CMD_QFW=y
+    CONFIG_ACPI=y
+    CONFIG_GENERATE_ACPI_TABLE=y
+
+On x86 these settings are already included in the defconfig files. ARM and
+RISC-V default to use device-trees.
+
+Instead of updating the configuration manually you can add the configuration
+fragment `acpi.config` to the make command for initializing the configuration.
+E.g.
+
+.. code-block:: bash
+
+    make qemu-riscv64_smode_defconfig acpi.config
diff --git a/doc/board/emulation/index.rst b/doc/board/emulation/index.rst
index 932c65adeb..d3d6b8f3d8 100644
--- a/doc/board/emulation/index.rst
+++ b/doc/board/emulation/index.rst
@@ -6,6 +6,7 @@ Emulation
 .. toctree::
    :maxdepth: 1
 
+   acpi
    blkdev
    ../../usage/semihosting
    qemu-arm
-- 
2.40.1