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authorArnd Bergmann <arnd@arndb.de>2015-01-28 15:45:53 +0100
committerJoerg Roedel <jroedel@suse.de>2015-01-30 13:39:28 +0100
commite5144c9375851948f50e13db80c3150e3a7521b8 (patch)
treea756408b0c739fda3a360592e52983d53679f00b /drivers/iommu
parent860cd64d102d9b6c97830e09c447a9a850ea7641 (diff)
downloadlinux-e5144c9375851948f50e13db80c3150e3a7521b8.tar.bz2
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>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/Kconfig8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index a839ca93376b..5189cc12c5a3 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -4,6 +4,7 @@ config IOMMU_API
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 @@ config IRQ_REMAP
# 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 TEGRA_IOMMU_SMMU
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_IPMMU_TLB
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 SPAPR_TCE_IOMMU
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