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Masahiro Yamada 01bf92788e ARM: 8623/1: mm: add ARM_L1_CACHE_SHIFT_7 for UniPhier outer cache 
The UniPhier outer cache (arch/arm/mm/cache-uniphier.c) has 128 byte
line length and its tags are also managed per 128 byte line.  This
is very unfortunate, but the current 64 byte alignment for kmalloc()
causes sharing problems on DMA if used with this outer cache.

This commit adds ARM_L1_CACHE_SHIFT_7 to increase the DMA minimum
alignment to 128 byte if CACHE_UNIPHIER is enabled.  There are
several drivers that assume aligning to L1_CACHE_BYTES will be DMA
safe, so this commit also changes the L1_CACHE_BYTES for safety.

Having said that, I hesitate to align all the other SoCs in Multi
platform to the UniPhier's requirement.  So, I am disabling the
CONFIG_CACHE_UNIPHIER by default, so that multi_v7_defconfig will
still stay with CONFIG_ARM_L1_CACHE_SHIFT=6.  With this commit,
UniPhier SoCs will become slower, but it is much better than system
crash.  If desired, the outer-cache can be enabled by merge_config
or something.

Note:
The UniPhier PH1-Pro5 SoC is equipped also with L3 cache with 256
byte line size but its tags are managed per 128 byte sub-line.
So, ARM_L1_CACHE_SHIFT_7 should be fine for all the UniPhier SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
 		2016-11-15 15:31:03 +00:00
..
boot Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
common Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2016-10-06 07:59:37 -07:00
configs fbdev changes for 4.9 2016-10-12 11:01:37 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 11:19:47 +08:00
firmware
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include ARM: 8619/1: udelay: document the various constants 2016-10-19 10:52:36 +01:00
kernel Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-10-14 14:26:58 -07:00
kvm KVM updates for v4.9-rc1 2016-10-06 10:49:01 -07:00
lib ARM: 8619/1: udelay: document the various constants 2016-10-19 10:52:36 +01:00
mach-alpine
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mach-artpec
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mach-asm9260
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mach-aspeed
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mach-at91 ARM: stop *MIGHT_HAVE_PCI* config from being selected redundantly 2016-09-21 22:45:05 +02:00
mach-axxia ARM: select PCI_DOMAINS config from ARCH_MULTIPLATFORM 2016-09-21 22:45:13 +02:00
mach-bcm ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-berlin
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mach-clps711x ARM: clps711x: remove extraneous files 2016-09-02 18:15:00 +02:00
mach-cns3xxx ARM: select PCI_DOMAINS config from ARCH_MULTIPLATFORM 2016-09-21 22:45:13 +02:00
mach-davinci ARM: DT updates for v4.9 2016-10-07 21:29:04 -07:00
mach-digicolor
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mach-dove
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mach-ebsa110
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mach-efm32
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mach-ep93xx
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mach-exynos ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-footbridge ARM: document and update UNCACHEABLE_ADDR definitions 2016-08-26 15:10:19 +01:00
mach-gemini
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mach-highbank
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mach-hisi
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mach-imx Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-10-14 14:26:58 -07:00
mach-integrator ARM: SoC: late DT updates for v4.9 2016-10-07 21:34:49 -07:00
mach-iop13xx
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mach-iop32x
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mach-iop33x
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mach-ixp4xx
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mach-keystone ARM: select PCI_DOMAINS config from ARCH_MULTIPLATFORM 2016-09-21 22:45:13 +02:00
mach-ks8695
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mach-lpc18xx
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mach-lpc32xx
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mach-mediatek
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mach-meson
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mach-mmp
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mach-moxart ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-mv78xx0 ARM: mv78xx0: simplify ethernet device creation 2016-09-14 16:35:37 +02:00
mach-mvebu ARM: don't include removed directories 2016-08-10 22:42:18 +02:00
mach-mxs ARM: mxs: remove obsolete startup code for TX28 2016-08-09 14:01:41 +08:00
mach-netx
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mach-nomadik ARM: nomadik: select MFD_SYSCON 2016-09-09 23:15:50 +02:00
mach-nspire DeviceTree update for 4.8: 2016-07-30 11:32:01 -07:00
mach-omap1 ARM: OMAP1: use IS_ENABLED() instead of checking for built-in or module 2016-08-26 08:41:59 -07:00
mach-omap2 ARM: SoC cleanups for v4.9 2016-10-07 21:16:16 -07:00
mach-orion5x ARM: orion5x: remove extraneous NO_IRQ 2016-09-14 16:36:20 +02:00
mach-oxnas ARM: oxnas: select reset controller framework 2016-08-10 22:42:32 +02:00
mach-picoxcell ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-prima2 ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-pxa ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-qcom ARM: qcom: Cleanup/Remove unnecessary board file 2016-08-23 15:46:05 -05:00
mach-realview This deletes the realview boardfiles, consolidates a bit 2016-09-02 18:12:09 +02:00
mach-rockchip ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-rpc ARM: document and update UNCACHEABLE_ADDR definitions 2016-08-26 15:10:19 +01:00
mach-s3c24xx ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-s3c64xx ARM: s3c64xx: Delete unnecessary assignment for the field "owner" 2016-08-16 08:16:43 +02:00
mach-s5pv210 ARM: don't include removed directories 2016-08-10 22:42:18 +02:00
mach-sa1100 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-10-07 09:12:19 -07:00
mach-shmobile ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-socfpga
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mach-spear ARM: stop *MIGHT_HAVE_PCI* config from being selected redundantly 2016-09-21 22:45:05 +02:00
mach-sti
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mach-stm32
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mach-sunxi ARM: sunxi: Support the Nextthing GR8 2016-09-08 14:32:23 +02:00
mach-tango
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mach-tegra ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-u300 ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-uniphier ARM: uniphier: remove SoC-specific SMP code 2016-08-29 01:57:14 +09:00
mach-ux500 ARM: SoC driver updates for v4.8 2016-08-01 18:36:01 -04:00
mach-versatile ARM: stop *MIGHT_HAVE_PCI* config from being selected redundantly 2016-09-21 22:45:05 +02:00
mach-vexpress ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-vt8500 ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-w90x900
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mach-zx
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mach-zynq
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mm ARM: 8623/1: mm: add ARM_L1_CACHE_SHIFT_7 for UniPhier outer cache 2016-11-15 15:31:03 +00:00
net
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nwfpe
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oprofile
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plat-iop
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plat-omap
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plat-orion ARM: orion: simplify orion_ge00_switch_init 2016-09-14 16:36:13 +02:00
plat-pxa ARM: pxa: remove platform dma code 2016-08-09 08:16:58 +02:00
plat-samsung ARM: EXYNOS: Remove unused DMC and CMU offsets and their mappings 2016-08-24 06:42:27 +02:00
plat-versatile
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probes
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tools ARM: Update mach-types 2016-10-30 20:21:20 +00:00
vdso
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vfp
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xen arm/xen: fix SMP guests boot 2016-09-14 14:39:13 +01:00
Kconfig Merge branch 'akpm' (patches from Andrew) 2016-10-07 21:38:00 -07:00
Kconfig-nommu
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Kconfig.debug Renesas ARM Based SoC Updates for v4.9 2016-09-15 00:27:27 +02:00
Makefile Merge branches 'misc' and 'sa1111-base' into for-linus 2016-10-06 08:56:43 +01:00