linux_dsm_epyc7002/arch/arm
Julien Grall 9435cce879 xen/swiotlb: Add support for 64KB page granularity
Swiotlb is used on ARM64 to support DMA on platform where devices are
not protected by an SMMU. Furthermore it's only enabled for DOM0.

While Xen is always using 4KB page granularity in the stage-2 page table,
Linux ARM64 may either use 4KB or 64KB. This means that a Linux page
can be spanned accross multiple Xen page.

The Swiotlb code has to validate that the buffer used for DMA is
physically contiguous in the memory. As a Linux page can't be shared
between local memory and foreign page by design (the balloon code always
removing entirely a Linux page), the changes in the code are very
minimal because we only need to check the first Xen PFN.

Note that it may be possible to optimize the function
check_page_physically_contiguous to avoid looping over every Xen PFN
for local memory. Although I will let this optimization for a follow-up.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-10-23 14:20:43 +01:00
..
boot Renesas ARM Based SoC Fixes for v4.3 2015-10-06 14:31:53 +02:00
common genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
configs ARM: omap2plus_defconfig: enable GPIO_PCA953X 2015-09-16 17:01:39 -07:00
crypto
firmware
include xen/swiotlb: Add support for 64KB page granularity 2015-10-23 14:20:43 +01:00
kernel ARM: wire up new syscalls 2015-09-22 08:13:42 +01:00
kvm arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS' 2015-09-17 13:13:27 +01:00
lib Merge branch 'uaccess' into fixes 2015-09-11 19:18:28 +01:00
mach-alpine
mach-asm9260
mach-at91 genalloc: add name arg to gen_pool_get() and devm_gen_pool_create() 2015-09-04 16:54:41 -07:00
mach-axxia
mach-bcm ARM: SoC platform updates for v4.3 2015-09-01 12:18:40 -07:00
mach-berlin
mach-clps711x libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
mach-cns3xxx
mach-davinci ARM: SoC platform updates for v4.3 2015-09-01 12:18:40 -07:00
mach-digicolor
mach-dove genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-ebsa110
mach-efm32
mach-ep93xx ARM/fb: ep93xx: switch framebuffer to use modedb only 2015-08-13 12:25:44 +02:00
mach-exynos ARM: EXYNOS: reset Little cores when cpu is up 2015-09-14 10:02:43 +09:00
mach-footbridge genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-gemini genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-highbank
mach-hisi
mach-imx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-integrator
mach-iop13xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-keystone
mach-ks8695
mach-lpc18xx
mach-lpc32xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-mediatek
mach-meson
mach-mmp ARM: mmp: remove unused RTC register definitions 2015-09-05 19:37:17 +02:00
mach-moxart
mach-mv78xx0
mach-mvebu ARM: SoC driver updates for v4.3 2015-09-01 13:00:04 -07:00
mach-mxs
mach-netx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-nomadik ARM: nomadik: move l2x0 setup to device tree 2015-08-11 15:29:59 +02:00
mach-nspire
mach-omap1 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-omap2 ARM: SoC fixes for v4.3-rc 2015-09-27 06:45:18 -04:00
mach-orion5x ARM: DT updates for v4.3 2015-09-01 13:09:20 -07:00
mach-picoxcell
mach-prima2 Merge branches 'cleanup', 'fixes', 'misc', 'omap-barrier' and 'uaccess' into for-linus 2015-09-03 15:28:37 +01:00
mach-pxa ARM: SoC fixes for v4.3-rc 2015-09-27 06:45:18 -04:00
mach-qcom
mach-realview
mach-rockchip ARM: rockchip: pm: Fix PTR_ERR() argument 2015-08-24 12:39:14 +02:00
mach-rpc genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-s3c24xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-s3c64xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-s5pv210
mach-sa1100 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-shmobile libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
mach-socfpga genalloc: add name arg to gen_pool_get() and devm_gen_pool_create() 2015-09-04 16:54:41 -07:00
mach-spear ARM: SoC cleanups for v4.3 2015-09-01 12:10:20 -07:00
mach-sti ARM: SoC platform updates for v4.3 2015-09-01 12:18:40 -07:00
mach-stm32
mach-sunxi
mach-tegra ARM: SoC driver updates for v4.3 2015-09-01 13:00:04 -07:00
mach-u300
mach-uniphier ARM: uniphier: drop v7_invalidate_l1 call at secondary entry 2015-08-13 12:12:10 +02:00
mach-ux500 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
mach-versatile
mach-vexpress
mach-vt8500
mach-w90x900
mach-zx ARM: SoC platform updates for v4.3 2015-09-01 12:18:40 -07:00
mach-zynq Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
mm ARM: alignment: fix alignment handling for uaccess changes 2015-09-24 11:07:00 +01:00
net
nwfpe ARM: swpan: fix nwfpe for uaccess changes 2015-09-09 23:26:11 +01:00
oprofile
plat-iop
plat-omap
plat-orion genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
plat-pxa ARM: pxa: ssp: Fix build error by removing originally incorrect DT binding 2015-09-13 12:55:27 +02:00
plat-samsung
plat-versatile
probes
tools
vdso
vfp
xen xen/swiotlb: Add support for 64KB page granularity 2015-10-23 14:20:43 +01:00
Kconfig Merge branch 'uaccess' into fixes 2015-09-11 19:18:28 +01:00
Kconfig-nommu
Kconfig.debug The i.MX SoC changes for 4.3: 2015-08-18 13:10:05 -07:00
Makefile ARM: 8429/1: disable GCC SRA optimization 2015-09-07 13:24:05 +01:00