From: Penny Zheng <penny.zh...@arm.com>
In Xen, SMMU subsystem is supported for MMU system only. The reason being SMMU
driver uses the same page tables as MMU.
Thus, we make it dependent on CONFIG_MMU.
Signed-off-by: Penny Zheng <penny.zh...@arm.com>
Signed-off-by: Ayan Kumar Halder <ayan.kumar.hal...@amd.com>
Acked-by: Julien Grall <jgr...@amazon.com>
---
Changes from
v1 - 1. HAS_PASSTHROUGH is now enclosed within "config MMU".
There was a pending response on
"[PATCH v1 2/2] xen/mmu: enable SMMU subsystem only in MMU"
that it might introduce a bunch of #if-defs in arm specific common code.
However, there are alternative implementations possible to reduce
#if-defs. So, that can be decided at a later point in time and should
not block the current patch.
v2 - 1. Added Julien's A-b.
xen/arch/arm/Kconfig | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index 23bbc91aad..604aba4996 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -15,9 +15,7 @@ config ARM
select GENERIC_UART_INIT
select HAS_ALTERNATIVE if HAS_VMAP
select HAS_DEVICE_TREE
- select HAS_PASSTHROUGH
select HAS_UBSAN
- select IOMMU_FORCE_PT_SHARE
config ARCH_DEFCONFIG
string
@@ -79,6 +77,8 @@ config MMU
bool "MMU"
select HAS_PMAP
select HAS_VMAP
+ select HAS_PASSTHROUGH
+ select IOMMU_FORCE_PT_SHARE
help
Select it if you plan to run Xen on A-profile Armv7+
--
2.25.1
