Hi Julien and Ayan
On 2023/7/4 20:04, Ayan Kumar Halder wrote:
On 04/07/2023 12:44, Julien Grall wrote:
Hi,
On 04/07/2023 12:14, Ayan Kumar Halder wrote:
On 26/06/2023 04:33, Penny Zheng wrote:
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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.zh...@arm.com>
Signed-off-by: Wei Chen <wei.c...@arm.com>
---
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
I don't think you can disable HAS_MMU right now. So you want to drop
the description to prevent a user to select it. This could then be
combined to
"def_bool 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
I don't think you need this option.
I think we want to introduce a 'choice' where the user can select
either the MPU or MMU. But not both.
+1 (I like this approach).
+1 from me
I will introduce the choice "ARM Memory Management Architecture" and
default HAS_MMU
This would be similar to how we select the Physical address space size.
Cheers,
