swiotlb: move the SWIOTLB config symbol to lib/Kconfig
This way we have one central definition of it, and user can select it as
needed. The new option is not user visible, which is the behavior
it had in most architectures, with a few notable exceptions:
- On x86_64 and mips/loongson3 it used to be user selectable, but
defaulted to y. It now is unconditional, which seems like the right
thing for 64-bit architectures without guaranteed availablity of
IOMMUs.
- on powerpc the symbol is user selectable and defaults to n, but
many boards select it. This change assumes no working setup
required a manual selection, but if that turned out to be wrong
we'll have to add another select statement or two for the respective
boards.
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4a176c3..c43f5bb 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1772,9 +1772,6 @@
and the task is only allowed to execute a few safe syscalls
defined by each seccomp mode.
-config SWIOTLB
- bool
-
config PARAVIRT
bool "Enable paravirtualization code"
help
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 9edcb14..b25ed78 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -143,6 +143,7 @@
select POWER_SUPPLY
select REFCOUNT_FULL
select SPARSE_IRQ
+ select SWIOTLB
select SYSCTL_EXCEPTION_TRACE
select THREAD_INFO_IN_TASK
help
@@ -238,9 +239,6 @@
config SMP
def_bool y
-config SWIOTLB
- def_bool y
-
config KERNEL_MODE_NEON
def_bool y
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 9403264..2067289 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -79,9 +79,6 @@
bool
default y
-config SWIOTLB
- bool
-
config STACKTRACE_SUPPORT
def_bool y
@@ -138,7 +135,6 @@
bool "generic"
select NUMA
select ACPI_NUMA
- select DMA_DIRECT_OPS
select SWIOTLB
select PCI_MSI
help
@@ -159,7 +155,6 @@
config IA64_DIG
bool "DIG-compliant"
- select DMA_DIRECT_OPS
select SWIOTLB
config IA64_DIG_VTD
@@ -175,7 +170,6 @@
config IA64_HP_ZX1_SWIOTLB
bool "HP-zx1/sx1000 with software I/O TLB"
- select DMA_DIRECT_OPS
select SWIOTLB
help
Build a kernel that runs on HP zx1 and sx1000 systems even when they
@@ -199,7 +193,6 @@
bool "SGI-UV"
select NUMA
select ACPI_NUMA
- select DMA_DIRECT_OPS
select SWIOTLB
help
Selecting this option will optimize the kernel for use on UV based
@@ -210,7 +203,6 @@
config IA64_HP_SIM
bool "Ski-simulator"
- select DMA_DIRECT_OPS
select SWIOTLB
depends on !PM
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 82934f2..2dcdc13 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -911,6 +911,7 @@
select MIPS_NR_CPU_NR_MAP_1024
select BUILTIN_DTB
select MTD_COMPLEX_MAPPINGS
+ select SWIOTLB
select SYS_SUPPORTS_RELOCATABLE
help
This option supports all of the Octeon reference boards from Cavium
@@ -1366,6 +1367,7 @@
select MIPS_PGD_C0_CONTEXT
select MIPS_L1_CACHE_SHIFT_6
select GPIOLIB
+ select SWIOTLB
help
The Loongson 3 processor implements the MIPS64R2 instruction
set with many extensions.
diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
index eb5faee..4984e46 100644
--- a/arch/mips/cavium-octeon/Kconfig
+++ b/arch/mips/cavium-octeon/Kconfig
@@ -67,10 +67,6 @@
help
Lock the kernel's implementation of memcpy() into L2.
-config SWIOTLB
- def_bool y
- select DMA_DIRECT_OPS
-
config OCTEON_ILM
tristate "Module to measure interrupt latency using Octeon CIU Timer"
help
diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig
index 2a4fb91..c79e6a5 100644
--- a/arch/mips/loongson64/Kconfig
+++ b/arch/mips/loongson64/Kconfig
@@ -130,13 +130,6 @@
default y
depends on EARLY_PRINTK || SERIAL_8250
-config SWIOTLB
- bool "Soft IOMMU Support for All-Memory DMA"
- default y
- depends on CPU_LOONGSON3
- select DMA_DIRECT_OPS
- select NEED_DMA_MAP_STATE
-
config PHYS48_TO_HT40
bool
default y if CPU_LOONGSON3
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e5da6b4..268fd46 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -473,15 +473,6 @@
depends on PPC64 && CPU_LITTLE_ENDIAN
def_bool !DISABLE_MPROFILE_KERNEL
-config SWIOTLB
- bool "SWIOTLB support"
- default n
- ---help---
- Support for IO bounce buffering for systems without an IOMMU.
- This allows us to DMA to the full physical address space on
- platforms where the size of a physical address is larger
- than the bus address. Not all platforms support this.
-
config HOTPLUG_CPU
bool "Support for enabling/disabling CPUs"
depends on SMP && (PPC_PSERIES || \
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 8219571..03f991e 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -20,6 +20,7 @@
select GENERIC_IOMAP
select MODULES_USE_ELF_REL
select NEED_DMA_MAP_STATE
+ select SWIOTLB
help
UniCore-32 is 32-bit Instruction Set Architecture,
including a series of low-power-consumption RISC chip
diff --git a/arch/unicore32/mm/Kconfig b/arch/unicore32/mm/Kconfig
index 45b7f76..82759b6 100644
--- a/arch/unicore32/mm/Kconfig
+++ b/arch/unicore32/mm/Kconfig
@@ -39,7 +39,3 @@
default y
help
Say Y here to disable the TLB single entry operations.
-
-config SWIOTLB
- def_bool y
- select DMA_DIRECT_OPS
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 31aad36..f2ee6a8ff 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -29,6 +29,7 @@
select HAVE_ARCH_SOFT_DIRTY
select MODULES_USE_ELF_RELA
select NEED_DMA_MAP_STATE
+ select SWIOTLB
select X86_DEV_DMA_OPS
select ARCH_HAS_SYSCALL_WRAPPER
@@ -919,17 +920,6 @@
Calgary anyway, pass 'iommu=calgary' on the kernel command line.
If unsure, say Y.
-# need this always selected by IOMMU for the VIA workaround
-config SWIOTLB
- def_bool y if X86_64
- select NEED_DMA_MAP_STATE
- ---help---
- Support for software bounce buffers used on x86-64 systems
- which don't have a hardware IOMMU. Using this PCI devices
- which can only access 32-bits of memory can be used on systems
- with more than 3 GB of memory.
- If unsure, say Y.
-
config MAXSMP
bool "Enable Maximum number of SMP Processors and NUMA Nodes"
depends on X86_64 && SMP && DEBUG_KERNEL
diff --git a/lib/Kconfig b/lib/Kconfig
index 1f12faf..1d84e61 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -451,6 +451,11 @@
depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
default n
+config SWIOTLB
+ bool
+ select DMA_DIRECT_OPS
+ select NEED_DMA_MAP_STATE
+
config CHECK_SIGNATURE
bool