ARM: virt: Add CONFIG_ARM_VIRT_EXT option

It is now possible to enable the virtualization extention support.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 101b968..c9a4963 100644 (file)
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -624,6 +624,23 @@ config ARM_THUMBEE
          Say Y here if you have a CPU with the ThumbEE extension and code to
          make use of it. Say N for code that can run on CPUs without ThumbEE.
 
+config ARM_VIRT_EXT
+       bool "Native support for the ARM Virtualization Extensions"
+       depends on MMU && CPU_V7
+       help
+         Enable the kernel to make use of the ARM Virtualization
+         Extensions to install hypervisors without run-time firmware
+         assistance.
+
+         A compliant bootloader is required in order to make maximum
+         use of this feature.  Refer to Documentation/arm/Booting for
+         details.
+
+         It is safe to enable this option even if the kernel may not be
+         booted in HYP mode, may not have support for the
+         virtualization extensions, or may be booted with a
+         non-compliant bootloader.
+
 config SWP_EMULATE
        bool "Emulate SWP/SWPB instructions"
        depends on !CPU_USE_DOMAINS && CPU_V7