linux/arch/arm
Linus Torvalds 234172f6bb add swiotlb support to arm
This fixes a cascade of regressions that originally started with
 the addition of the ia64 port, but only got fatal once we removed
 most uses of block layer bounce buffering in Linux 4.18.
 
 The reason is that while the original i386/PAE code that was the first
 architecture that supported > 4GB of memory without an iommu decided to
 leave bounce buffering to the subsystems, which in those days just mean
 block and networking as no one else consumer arbitrary userspace memory.
 
 Later with ia64, x86_64 and other ports we assumed that either an iommu
 or something that fakes it up ("software IOTLB" in beautiful Intel
 speak) is present and that subsystems can rely on that for dealing with
 addressing limitations in devices.   Except that the ARM LPAE scheme
 that added larger physical address to 32-bit ARM did not follow that
 scheme and thus only worked by chance and only for block and networking
 I/O directly to highmem.
 
 Long story, short fix - add swiotlb support to arm when build for LPAE
 platforms, which actuallys turns out to be pretty trivial with the
 modern dma-direct / swiotlb code to fix the Linux 4.18-ish regression.
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Merge tag 'arm-swiotlb-5.3' of git://git.infradead.org/users/hch/dma-mapping

Pull arm swiotlb support from Christoph Hellwig:
 "This fixes a cascade of regressions that originally started with the
  addition of the ia64 port, but only got fatal once we removed most
  uses of block layer bounce buffering in Linux 4.18.

  The reason is that while the original i386/PAE code that was the first
  architecture that supported > 4GB of memory without an iommu decided
  to leave bounce buffering to the subsystems, which in those days just
  mean block and networking as no one else consumed arbitrary userspace
  memory.

  Later with ia64, x86_64 and other ports we assumed that either an
  iommu or something that fakes it up ("software IOTLB" in beautiful
  Intel speak) is present and that subsystems can rely on that for
  dealing with addressing limitations in devices. Except that the ARM
  LPAE scheme that added larger physical address to 32-bit ARM did not
  follow that scheme and thus only worked by chance and only for block
  and networking I/O directly to highmem.

  Long story, short fix - add swiotlb support to arm when build for LPAE
  platforms, which actuallys turns out to be pretty trivial with the
  modern dma-direct / swiotlb code to fix the Linux 4.18-ish regression"

* tag 'arm-swiotlb-5.3' of git://git.infradead.org/users/hch/dma-mapping:
  arm: use swiotlb for bounce buffering on LPAE configs
  dma-mapping: check pfn validity in dma_common_{mmap,get_sgtable}
2019-08-02 08:44:33 -07:00
..
boot i.MX fixes for 5.3: 2019-07-23 10:13:24 -07:00
common docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
configs ARM: defconfig: u8500: Add new drivers 2019-07-23 10:13:13 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
include arm: use swiotlb for bounce buffering on LPAE configs 2019-07-24 17:29:01 +02:00
kernel Modules updates for v5.3 2019-07-18 12:06:57 -07:00
kvm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
lib ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-actions treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mach-alpine treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-artpec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-asm9260 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-aspeed treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-at91 ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-axxia treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-bcm ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-berlin treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-clps711x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mach-cns3xxx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 418 2019-06-05 17:37:15 +02:00
mach-davinci ARM: davinci: fix sleep.S build error on ARMv4 2019-07-23 10:12:53 -07:00
mach-digicolor treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-dove treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-ebsa110 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-efm32 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-ep93xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-exynos ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-footbridge treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-gemini treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-highbank ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-hisi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-imx ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-integrator treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-iop13xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
mach-iop32x Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-07-15 21:10:39 -07:00
mach-iop33x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-ixp4xx docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
mach-keystone ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-ks8695 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-lpc18xx treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-lpc32xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-mediatek treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mach-meson treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-milbeaut treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-mmp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 506 2019-06-19 17:11:22 +02:00
mach-moxart treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-mv78xx0 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-mvebu treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 406 2019-06-05 17:37:13 +02:00
mach-mxs treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-nomadik treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mach-npcm treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-nspire treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-omap1 Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
mach-omap2 ARM: SoC-related driver updates 2019-07-19 17:13:56 -07:00
mach-orion5x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mach-oxnas treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-picoxcell treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-prima2 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4 2019-05-21 11:28:40 +02:00
mach-pxa ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-qcom treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-rda treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-realview treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-rockchip Another missing of_node_put 2019-06-17 05:14:24 -07:00
mach-rpc ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-s3c24xx docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
mach-s3c64xx Merge branch 'regulator-5.3' into regulator-next 2019-07-04 17:34:32 +01:00
mach-s5pv210
mach-sa1100 ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-shmobile ARM: mach-shmobile: Don't init CNTVOFF/counter if PSCI is available 2019-05-31 11:38:01 +02:00
mach-socfpga treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-spear treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-sti treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-stm32 ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-sunxi treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-tango ARM: use arch_extension directive instead of arch argument 2019-06-19 09:44:25 -07:00
mach-tegra treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-u300 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
mach-uniphier
mach-ux500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-versatile Versatile platform updates for the v5.3 kernel cycle: 2019-06-17 05:11:53 -07:00
mach-vexpress treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-vt8500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mach-w90x900 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-zx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-zynq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mm arm: use swiotlb for bounce buffering on LPAE configs 2019-07-24 17:29:01 +02:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
nwfpe treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
oprofile
plat-iop Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-07-15 21:10:39 -07:00
plat-omap treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
plat-orion treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
plat-pxa treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
plat-samsung docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
plat-versatile treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
probes treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tools docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
vdso kbuild: add --hash-style= and --build-id unconditionally 2019-07-17 22:37:51 +09:00
vfp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
xen treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
Kconfig ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
Kconfig-nommu
Kconfig.debug ARM: Delete netx a second time 2019-07-21 20:03:11 -07:00
Makefile ARM: delete netx machine 2019-05-22 13:55:50 +02:00