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Geert Uytterhoeven 41c6b3e898 swiotlb: Add swiotlb=noforce debug option 
commit fff5d99225 upstream.

On architectures like arm64, swiotlb is tied intimately to the core
architecture DMA support. In addition, ZONE_DMA cannot be disabled.

To aid debugging and catch devices not supporting DMA to memory outside
the 32-bit address space, add a kernel command line option
"swiotlb=noforce", which disables the use of bounce buffers.
If specified, trying to map memory that cannot be used with DMA will
fail, and a rate-limited warning will be printed.

Note that io_tlb_nslabs is set to 1, which is the minimal supported
value.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-26 08:24:44 +01:00
..
80211
docs-rst: sphinxify 802.11 documentation
2016-10-11 16:19:17 -06:00
ABI
Merge tag 'platform-drivers-x86-v4.9-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
2016-11-11 16:48:49 -08:00
accounting
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acpi
Merge branches 'acpi-button', 'acpi-battery' and 'acpi-doc'
2016-10-02 01:40:20 +02:00
aoe
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arm
Merge tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2016-10-14 15:17:12 -07:00
arm64
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2016-10-03 08:58:35 -07:00
auxdisplay
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backlight
backlight: lp855x_bl: support new LP8555 device
2013-11-13 12:09:14 +09:00
blackfin
samples: move blackfin gptimers-example from Documentation
2016-10-10 07:12:02 -06:00
block
block: remove remnant refs to hardsect
2016-09-14 08:44:57 -06:00
blockdev
zram: cosmetic: cleanup documentation
2016-07-26 16:19:19 -07:00
bus-devices
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cdrom
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cgroup-v1
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cma
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connector
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console
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cpu-freq
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cpuidle
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cris
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crypto
crypto: doc - Fix typo
2016-05-31 16:41:55 +08:00
dev-tools
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
2016-10-11 15:06:33 -07:00
development-process
docs-rst: add inter-document cross references
2016-09-21 15:43:09 -06:00
device-mapper
dm raid: fix activation of existing raid4/10 devices
2016-10-17 16:41:31 -04:00
devicetree
ARM: dts: imx31: fix clock control module interrupts description
2017-01-26 08:24:36 +01:00
dmaengine
dmaengine: documentation to the new callback mechanism
2016-08-08 08:11:42 +05:30
DocBook
Merge tag 'docs-4.9-2' of git://git.lwn.net/linux
2016-10-14 14:11:22 -07:00
driver-api
docs: Don't format internal MPT docs
2016-09-06 09:15:48 -06:00
driver-model
Merge tag 'for-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
2016-10-06 18:21:15 -07:00
early-userspace
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EDID
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extcon
extcon: fix switch class porting guide (Documentation)
2014-01-07 11:54:28 +09:00
fault-injection
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fb
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features
Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
2016-10-13 17:19:19 +02:00
filesystems
fs: remove the never implemented aio_fsync file operation
2016-10-30 13:09:42 -04:00
firmware_class
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fmc
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fpga
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frv
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gpio
gpio/board.txt: point to gpiod_set_value
2016-10-20 14:14:11 +02:00
gpu
Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux
2016-10-11 18:12:22 -07:00
hid
Documentation: HID: Intel ISH HID document
2016-08-17 11:13:07 +02:00
hwmon
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i2c
i2c: Documentation: i2c-topology: fix minor whitespace nit
2016-11-10 21:18:56 +01:00
ia64
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ide
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iio
iio: Documentation: Correct the path used to create triggers.
2016-10-01 00:49:58 -06:00
infiniband
IB/hfi1: Document new sysfs entries for hfi1 driver
2016-10-02 08:42:19 -04:00
input
Input: ALPS - add V8 protocol documentation
2016-10-04 11:47:02 -07:00
ioctl
doc: ioctl: Add some clarifications to botching-up-ioctls
2016-09-06 06:00:22 -06:00
isdn
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ja_JP
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kbuild
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2016-10-14 14:26:58 -07:00
kdump
Documentation: kdump: Add description of enable multi-cpus support
2016-09-20 18:02:54 -06:00
ko_KR
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laptops
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leds
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
2016-10-04 10:25:53 -07:00
livepatch
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locking
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m68k
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media
docs-rst: fix LaTeX \DURole renewcommand with Sphinx 1.3+
2017-01-12 11:39:32 +01:00
memory-devices
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metag
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mic
samples: move mic/mpssd example code from Documentation
2016-09-20 12:38:48 -06:00
mips
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misc-devices
samples: move misc-devices/mei example code from Documentation
2016-09-23 11:51:43 -06:00
mmc
mmc: core: Extend sysfs with DSR register
2016-07-25 10:34:51 +02:00
mn10300
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mtd
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namespaces
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netlabel
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networking
netfilter: fix nf_conntrack_helper documentation
2016-11-24 12:50:24 +01:00
nfc
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nios2
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nvdimm
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nvmem
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parisc
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PCI
Merge tag 'pci-v4.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
2016-10-07 11:46:37 -07:00
pcmcia
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perf
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phy
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platform
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power
Merge tag 'for-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
2016-10-06 18:21:15 -07:00
powerpc
Merge tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2016-10-07 20:19:31 -07:00
pps
Documentation: pps: fix spelling mistake
2016-04-28 07:23:59 -06:00
prctl
selftests: move prctl tests from Documentation/prctl
2016-09-20 09:09:09 -06:00
pti
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ptp
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rapidio
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RCU
kthread: kthread worker API cleanup
2016-10-11 15:06:33 -07:00
s390
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scheduler
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scsi
scsi: g_NCR5380: Stop using scsi_module.c
2016-09-29 21:52:43 -04:00
security
Merge tag 'docs-for-linus' of git://git.lwn.net/linux
2016-07-26 13:05:11 -07:00
serial
Documentation: rs485: Do not define manually the ioctl
2016-08-18 11:08:33 -06:00
sh
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sound
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sphinx
docs: sphinx-extensions: make rstFlatTable work with docutils 0.13
2017-01-09 08:32:18 +01:00
sphinx-static
Merge tag 'docs-4.9' of git://git.lwn.net/linux
2016-10-04 13:54:07 -07:00
spi
Doc: update 00-INDEX files to reflect the runnable code move
2016-10-10 07:12:09 -06:00
sysctl
mnt: Add a per mount namespace limit on the number of mounts
2016-09-30 12:46:48 -05:00
target
target: make close_session optional
2016-05-10 01:19:26 -07:00
thermal
thermal: Add support for hardware-tracked trip points
2016-09-27 14:02:16 +08:00
timers
Doc: update 00-INDEX files to reflect the runnable code move
2016-10-10 07:12:09 -06:00
tpm
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trace
Merge tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2016-10-06 11:48:41 -07:00
usb
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virtual
KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state
2017-01-09 08:32:22 +01:00
vm
Merge tag 'doc-4.8-fixes' of git://git.lwn.net/linux
2016-08-07 10:23:17 -04:00
w1
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watchdog
Merge tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2016-10-14 15:17:12 -07:00
wimax
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x86
Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-10 11:01:51 -07:00
xtensa
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zh_CN
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.gitignore
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00-INDEX
Doc: update 00-INDEX files to reflect the runnable code move
2016-10-10 07:12:09 -06:00
adding-syscalls.txt
documentation: trivial typo: adding-syscalls.txt: s/statat/fstatat/
2016-04-18 11:31:49 -06:00
applying-patches.txt
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assoc_array.txt
KEYS: Fix multiple key add into associative array
2013-12-02 11:24:18 +00:00
atomic_ops.txt
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bad_memory.txt
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basic_profiling.txt
[PATCH] oprofile: report anonymous region samples
2005-06-24 00:06:27 -07:00
bcache.txt
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binfmt_misc.txt
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braille-console.txt
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bt8xxgpio.txt
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btmrvl.txt
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BUG-HUNTING
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bus-virt-phys-mapping.txt
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cachetlb.txt
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cgroup-v2.txt
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Changes
docs: Clean up bare :: lines
2016-09-20 18:46:36 -06:00
circular-buffers.txt
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clk.txt
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CodeOfConflict
URL changed for Linux Foundation TAB
2016-10-01 00:57:13 -06:00
CodingStyle
docs: Remove space-before-label guidance from CodingStyle
2016-09-21 15:53:31 -06:00
conf.py
docs-rst: fix LaTeX \DURole renewcommand with Sphinx 1.3+
2017-01-12 11:39:32 +01:00
cpu-hotplug.txt
Documentation: cpu-hotplug: Fix sysfs mount instructions
2015-12-10 11:35:30 -07:00
cpu-load.txt
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cputopology.txt
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crc32.txt
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dcdbas.txt
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debugging-modules.txt
Documentation: Clarify when module debugging actually works.
2008-02-03 15:27:38 +02:00
debugging-via-ohci1394.txt
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dell_rbu.txt
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devices.txt
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digsig.txt
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DMA-API-HOWTO.txt
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DMA-API.txt
dma-mapping: add dma_{map,unmap}_resource
2016-09-26 22:16:41 +05:30
DMA-attributes.txt
dma-mapping: introduce the DMA_ATTR_NO_WARN attribute
2016-10-11 15:06:32 -07:00
dma-buf-sharing.txt
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DMA-ISA-LPC.txt
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docutils.conf
doc-rst: add docutils config file
2016-08-14 11:52:40 -06:00
dontdiff
GCC plugin infrastructure
2016-06-07 22:57:10 +02:00
dynamic-debug-howto.txt
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edac.txt
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efi-stub.txt
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eisa.txt
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email-clients.txt
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flexible-arrays.txt
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futex-requeue-pi.txt
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gcc-plugins.txt
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highuid.txt
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HOWTO
docs: Clean up bare :: lines
2016-09-20 18:46:36 -06:00
hw_random.txt
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hwspinlock.txt
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index.rst
docs-rst: sphinxify 802.11 documentation
2016-10-11 16:19:17 -06:00
init.txt
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initrd.txt
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intel_txt.txt
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Intel-IOMMU.txt
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io_ordering.txt
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io-mapping.txt
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iostats.txt
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IPMI.txt
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IRQ-affinity.txt
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IRQ-domain.txt
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IRQ.txt
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irqflags-tracing.txt
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isa.txt
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isapnp.txt
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java.txt
Documentation: update java sample wrapper for java 7
2014-05-25 12:39:00 -07:00
kernel-doc-nano-HOWTO.txt
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kernel-docs.txt
Documentation/kernel-docs.txt: reorder based on timestamp
2016-09-20 18:54:42 -06:00
kernel-documentation.rst
Merge tag 'docs-4.9' of git://git.lwn.net/linux
2016-10-04 13:54:07 -07:00
kernel-parameters.txt
swiotlb: Add swiotlb=noforce debug option
2017-01-26 08:24:44 +01:00
kernel-per-CPU-kthreads.txt
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kobject.txt
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kprobes.txt
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kref.txt
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kselftest.txt
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ldm.txt
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local_ops.txt
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lockup-watchdogs.txt
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logo.gif
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logo.txt
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lzo.txt
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magic-number.txt
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mailbox.txt
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Makefile
samples: move blackfin gptimers-example from Documentation
2016-10-10 07:12:02 -06:00
Makefile.sphinx
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ManagementStyle
Documentation/HOWTO: add cross-references to other documents
2016-09-20 18:41:04 -06:00
md-cluster.txt
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md.txt
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memory-barriers.txt
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memory-hotplug.txt
memory_hotplug: introduce CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE
2016-05-19 19:12:14 -07:00
men-chameleon-bus.txt
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module-signing.txt
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mono.txt
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nommu-mmap.txt
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ntb.txt
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numastat.txt
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oops-tracing.txt
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padata.txt
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parport-lowlevel.txt
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parport.txt
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percpu-rw-semaphore.txt
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phy.txt
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pi-futex.txt
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pinctrl.txt
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pnp.txt
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preempt-locking.txt
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printk-formats.txt
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pwm.txt
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ramoops.txt
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rbtree.txt
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remoteproc.txt
remoteproc: Split driver and consumer dereferencing
2016-10-02 22:50:21 -07:00
rfkill.txt
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robust-futex-ABI.txt
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robust-futexes.txt
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rpmsg.txt
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rtc.txt
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SAK.txt
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SecurityBugs
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serial-console.txt
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sgi-ioc4.txt
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SM501.txt
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smsc_ece1099.txt
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stable_api_nonsense.txt
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stable_kernel_rules.txt
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static-keys.txt
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SubmitChecklist
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SubmittingDrivers
docs-rst: add inter-document cross references
2016-09-21 15:43:09 -06:00
SubmittingPatches
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svga.txt
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sync_file.txt
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sysfs-rules.txt
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sysrq.txt
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this_cpu_ops.txt
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unaligned-memory-access.txt
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unicode.txt
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unshare.txt
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vfio.txt
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VGA-softcursor.txt
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video-output.txt
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vme_api.txt
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volatile-considered-harmful.txt
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workqueue.txt
workqueue: Fix a typo in workqueue.txt
2016-07-06 02:37:38 -06:00
xillybus.txt
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xz.txt
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zorro.txt
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