iommu: Disable on !MMU builds
A lot of the IOMMU support code does not build if the CPU does
not have an MMU itself, and it's not clear if there is any
use case for it, so let's just disable it and wait for anybody
to need it.
This avoids randconfig errors like
../arch/arm/mm/dma-mapping.c: In function '__iommu_alloc_remap':
../arch/arm/mm/dma-mapping.c:1278:34: error: 'VM_ARM_DMA_CONSISTENT' undeclared (first use in this function)
area = get_vm_area_caller(size, VM_ARM_DMA_CONSISTENT | VM_USERMAP,
^
../arch/arm/mm/dma-mapping.c:1278:34: note: each undeclared identifier is reported only once for each function it appears in
../arch/arm/mm/dma-mapping.c: In function '__atomic_get_pages':
../arch/arm/mm/dma-mapping.c:1358:27: error: 'atomic_pool' undeclared (first use in this function)
struct dma_pool *pool = &atomic_pool;
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index a839ca9..5189cc1 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -4,6 +4,7 @@
menuconfig IOMMU_SUPPORT
bool "IOMMU Hardware Support"
+ depends on MMU
default y
---help---
Say Y here if you want to compile device drivers for IO Memory
@@ -144,7 +145,7 @@
# OMAP IOMMU support
config OMAP_IOMMU
bool "OMAP IOMMU Support"
- depends on ARCH_OMAP2PLUS
+ depends on ARCH_OMAP2PLUS && MMU
select IOMMU_API
config OMAP_IOMMU_DEBUG
@@ -191,7 +192,7 @@
config EXYNOS_IOMMU
bool "Exynos IOMMU Support"
- depends on ARCH_EXYNOS && ARM
+ depends on ARCH_EXYNOS && ARM && MMU
select IOMMU_API
select ARM_DMA_USE_IOMMU
help
@@ -220,7 +221,7 @@
config SHMOBILE_IOMMU
bool "IOMMU for Renesas IPMMU/IPMMUI"
default n
- depends on ARM
+ depends on ARM && MMU
depends on ARCH_SHMOBILE || COMPILE_TEST
select IOMMU_API
select ARM_DMA_USE_IOMMU
@@ -309,6 +310,7 @@
config ARM_SMMU
bool "ARM Ltd. System MMU (SMMU) Support"
depends on ARM64 || (ARM_LPAE && OF)
+ depends on MMU
select IOMMU_API
select ARM_DMA_USE_IOMMU if ARM
help