Add kbuild support for RPAL, including new folder arch/x86/kernel/rpal and
new config CONFIG_RPAL.

Signed-off-by: Bo Li <libo.gcs85@bytedance.com>
---
 arch/x86/Kbuild        |  2 ++
 arch/x86/Kconfig       |  2 ++
 arch/x86/rpal/Kconfig  | 11 +++++++++++
 arch/x86/rpal/Makefile |  0
 4 files changed, 15 insertions(+)
 create mode 100644 arch/x86/rpal/Kconfig
 create mode 100644 arch/x86/rpal/Makefile

diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild
index f7fb3d88c57b..26c406442d79 100644
--- a/arch/x86/Kbuild
+++ b/arch/x86/Kbuild
@@ -34,5 +34,7 @@ obj-$(CONFIG_KEXEC_FILE) += purgatory/
 
 obj-y += virt/
 
+obj-y += rpal/
+
 # for cleaning
 subdir- += boot tools
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 121f9f03bd5c..3f53b6fc943f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2359,6 +2359,8 @@ config X86_BUS_LOCK_DETECT
 	  Enable Split Lock Detect and Bus Lock Detect functionalities.
 	  See <file:Documentation/arch/x86/buslock.rst> for more information.
 
+source "arch/x86/rpal/Kconfig"
+
 endmenu
 
 config CC_HAS_NAMED_AS
diff --git a/arch/x86/rpal/Kconfig b/arch/x86/rpal/Kconfig
new file mode 100644
index 000000000000..e5e6996553ea
--- /dev/null
+++ b/arch/x86/rpal/Kconfig
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# This Kconfig describes RPAL options
+#
+
+config RPAL
+	def_bool y
+	depends on X86_64
+	help
+		This option enables system support for Run Process As
+		library (RPAL).
\ No newline at end of file
diff --git a/arch/x86/rpal/Makefile b/arch/x86/rpal/Makefile
new file mode 100644
index 000000000000..e69de29bb2d1
-- 
2.20.1