Kconfig: Introduce CONFIG_XEN

Introduce CONFIG_XEN to make U-Boot could be used as bootloader
for a virtual machine.

Without bootloader, we could successfully boot up android on XEN, but
we need need bootloader to support A/B, dm verify and etc.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>

diff --git a/Kconfig b/Kconfig
index 372425e..883e3f7 100644 (file)
--- a/Kconfig
+++ b/Kconfig
@@ -105,6 +105,24 @@ config CC_COVERAGE
 config CC_HAS_ASM_INLINE
        def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
 
+config XEN
+       bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
+       help
+         Enabling this option will make U-Boot be run as a bootloader
+         for XEN [1] Virtual Machine.
+
+         Xen is a virtual machine monitor (VMM) or a type-1 hypervisor with support
+         for para-virtualization. Xen can organize the safe execution of several
+         virtual machines on the same physical system with performance close to
+         native. It is used as the basis for a number of different commercial and
+         open source applications, such as: server virtualization, Infrastructure
+         as a Service (IaaS), desktop virtualization, security applications,
+         embedded and hardware appliances.
+         Xen has a special VM called Domain-0 that runs the Dom0 kernel and allows
+         Xen to use the device drivers for the Domain-0 kernel by default.
+
+         [1] - https://xenproject.org/
+
 config DISTRO_DEFAULTS
        bool "Select defaults suitable for booting general purpose Linux distributions"
        select AUTO_COMPLETE