[PATCH v3 06/52] xen/arm: introduce CONFIG_HAS_MMU

[Penny Zheng <Penny.Zheng@xxxxxxx>]

This commit wants to introduce a new Kconfig CONFIG_HAS_MMU to guard
MMU-related codes, to tell two different memory management architecture:
VMAS and PMSA.

In a VMSA system, a Memory Management Unit (MMU) provides fine-grained
control of a memory system through a set of virtual to physical address
mappings and associated memory properties held in memory-mapped tables
known as translation tables.

Signed-off-by: Penny Zheng <penny.zheng@xxxxxxx>
Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
---
v3:
- new patch
---
 xen/arch/arm/Kconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index ff17345cdb..fb77392b82 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -60,6 +60,14 @@ config PADDR_BITS
 
 source "arch/Kconfig"
 
+config HAS_MMU
+       bool "Memory Management Unit support in a VMSA system"
+       default y
+       help
+         In a VMSA system, a Memory Management Unit (MMU) provides 
fine-grained control of
+         a memory system through a set of virtual to physical address mappings 
and associated memory
+         properties held in memory-mapped tables known as translation tables.
+
 config ACPI
        bool "ACPI (Advanced Configuration and Power Interface) Support 
(UNSUPPORTED)" if UNSUPPORTED
        depends on ARM_64
-- 
2.25.1