[Xen-devel] [PATCH] docs, arm: add documentation on available defconfigs

[Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>]

As build system now have *_defconfig targets defined,
lets describe available defconfig files for the Arm architecture.

Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
---
 docs/misc/arm/defconfigs.txt | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 docs/misc/arm/defconfigs.txt

diff --git a/docs/misc/arm/defconfigs.txt b/docs/misc/arm/defconfigs.txt
new file mode 100644
index 0000000000..46c5039eba
--- /dev/null
+++ b/docs/misc/arm/defconfigs.txt
@@ -0,0 +1,23 @@
+Xen hypervisor for Arm architecture have a number of defconfigs, which
+can be used by issuing
+
+    make xxxxx_defconfig
+
+Those defconfigs are located in xen/arch/arm/configs.
+
+Generally, you don't need to use any particular defconfig if you want
+to build default version of Xen. This is because default Xen
+configuration is intended to run on any supported platform.
+
+Anyways, there is a number of defconfig files which have special use:
+
+ - arm32_defconfig is the special defconfig file used by build system as
+   the default configuration for the arm32 sub-architecture.
+
+ - arm64_defconfig is the same as arm32_defconfig, but for arm64 builds.
+
+ - tiny64_defconfig configures Xen hypervisor for the minimal possible
+   build for arm64 architecture. It disables most of the configuration
+   options, except the credit scheduler. Use 'make menuconfig' to
+   enable features needed for your platform, or produced image will
+   be non-functional.
-- 
2.21.0

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