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Nicolas Pitre 08e445bd6a [ARM] 5366/1: fix shared memory coherency with VIVT L1 + L2 caches 
When there are multiple L1-aliasing userland mappings of the same physical
page, we currently remap each of them uncached, to prevent VIVT cache
aliasing issues. (E.g. writes to one of the mappings not being immediately
visible via another mapping.)  However, when we do this remapping, there
could still be stale data in the L2 cache, and an uncached mapping might
bypass L2 and go straight to RAM.  This would cause reads from such
mappings to see old data (until the dirty L2 line is eventually evicted.)

This issue is solved by forcing a L2 cache flush whenever the shared page
is made L1 uncacheable.

Ideally, we would make L1 uncacheable and L2 cacheable as L2 is PIPT. But
Feroceon does not support that combination, and the TEX=5 C=0 B=0 encoding
for XSc3 doesn't appear to work in practice.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
 		2009-01-28 16:55:00 +00:00
..
Kconfig Merge branch 'for-rmk-realview' of git://linux-arm.org/linux-2.6 into devel 2008-12-01 17:53:45 +00:00
Makefile [ARM] dma: rename consistent.c to dma-mapping.c 2008-09-25 15:59:19 +01:00
abort-ev4.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
abort-ev4t.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
abort-ev5t.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
abort-ev5tj.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
abort-ev6.S [ARM] CONFIG_CPU_MPCORE -> CONFIG_CPU_32v6K 2006-02-22 21:13:28 +00:00
abort-ev7.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
abort-lv4t.S [ARM] nommu: abort handler fixup for !CPU_CP15_MMU cores. 2006-09-28 20:15:46 +01:00
abort-macro.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
abort-nommu.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
alignment.c Merge branch 'omap3-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 into devel 2008-12-15 22:13:26 +00:00
cache-feroceon-l2.c [ARM] 5329/1: Feroceon: fix feroceon_l2_inv_range 2008-11-08 23:08:54 +00:00
cache-l2x0.c [ARM] Convert asm/io.h to linux/io.h 2008-09-06 12:10:45 +01:00
cache-v3.S [ARM] Remove unnecessary mach/hardware.h includes in arch/arm/mm 2008-11-28 23:20:39 +00:00
cache-v4.S [ARM] Remove unnecessary mach/hardware.h includes in arch/arm/mm 2008-11-28 23:20:39 +00:00
cache-v4wb.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cache-v4wt.S [ARM] Remove unnecessary mach/hardware.h includes in arch/arm/mm 2008-11-28 23:20:39 +00:00
cache-v6.S [ARM] 3356/1: Workaround for the ARM1136 I-cache invalidation problem 2006-03-10 22:26:47 +00:00
cache-v7.S ARMv7: Add extra barriers for flush_cache_all compressed/head.S 2008-11-06 13:23:07 +00:00
cache-xsc3l2.c [ARM] xsc3: fix xsc3_l2_inv_range 2008-11-06 10:48:29 -07:00
context.c Merge branches 'armv7', 'at91', 'misc' and 'omap' into devel 2007-05-09 10:41:28 +01:00
copypage-feroceon.c [ARM] fix a couple clear_user_highpage assembly constraints 2008-11-28 15:36:43 +00:00
copypage-v3.c [ARM] fix a couple clear_user_highpage assembly constraints 2008-11-28 15:36:43 +00:00
copypage-v4mc.c [ARM] fix StrongARM-11x0 page copy implementation 2009-01-24 11:41:17 +00:00
copypage-v4wb.c [ARM] fix a couple clear_user_highpage assembly constraints 2008-11-28 15:36:43 +00:00
copypage-v4wt.c [ARM] fix a couple clear_user_highpage assembly constraints 2008-11-28 15:36:43 +00:00
copypage-v6.c [ARM] clearpage: provide our own clear_user_highpage() 2008-11-27 23:53:48 +00:00
copypage-xsc3.c [ARM] fix a couple clear_user_highpage assembly constraints 2008-11-28 15:36:43 +00:00
copypage-xscale.c [ARM] fix a couple clear_user_highpage assembly constraints 2008-11-28 15:36:43 +00:00
discontig.c mm: move bootmem descriptors definition to a single place 2008-07-24 10:47:14 -07:00
dma-mapping.c NOMMU: Rename ARM's struct vm_region 2009-01-08 12:04:47 +00:00
extable.c [ARM] Convert asm/uaccess.h to linux/uaccess.h 2008-09-06 11:35:55 +01:00
fault-armv.c [ARM] 5366/1: fix shared memory coherency with VIVT L1 + L2 caches 2009-01-28 16:55:00 +00:00
fault.c Merge branch 'mxc-pu-imxfb' of git://pasiphae.extern.pengutronix.de/git/imx/linux-2.6 into devel 2008-12-17 20:04:45 +00:00
fault.h [ARM] do_bad_area() always takes current and current->active_mm 2006-09-27 16:13:48 +01:00
flush.c [ARM] cachetype: move definitions to separate header 2008-09-01 12:06:24 +01:00
init.c [ARM] use asm/sections.h 2008-12-01 11:53:07 +00:00
iomap.c [ARM] Convert asm/io.h to linux/io.h 2008-09-06 12:10:45 +01:00
ioremap.c [ARM] fix section-based ioremap 2009-01-25 17:36:34 +00:00
mm.h [ARM] use asm/sections.h 2008-12-01 11:53:07 +00:00
mmap.c [ARM] sparse: fix several warnings 2008-09-05 14:11:24 +01:00
mmu.c [ARM] eliminate NULL test and memset after alloc_bootmem 2008-12-14 12:05:03 +00:00
nommu.c [ARM] use asm/sections.h 2008-12-01 11:53:07 +00:00
pgd.c [ARM] remove memzero() 2008-11-27 12:37:59 +00:00
proc-arm6_7.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm7tdmi.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm9tdmi.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm720.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm740.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm920.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm922.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm925.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm926.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm940.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm946.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm1020.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm1020e.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm1022.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-arm1026.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-feroceon.S Merge branch 'for-rmk' of git://git.marvell.com/orion 2008-10-09 21:33:07 +01:00
proc-macros.S [ARM] Remove MT_DEVICE_IXP2000 and associated definitions 2008-10-01 16:41:06 +01:00
proc-sa110.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-sa1100.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
proc-syms.c [ARM] 5364/1: allow flush_ioremap_region() to be used from modules 2009-01-12 13:51:03 +00:00
proc-v6.S Modern processors may need to drain the WB before WFI 2008-11-10 14:14:11 +00:00
proc-v7.S Merge branch 'for-rmk' of git://linux-arm.org/linux-2.6 into devel 2008-11-27 12:42:48 +00:00
proc-xsc3.S [ARM] pxa: add base PXA935 support due to CPUID change 2008-12-02 14:42:40 +08:00
proc-xscale.S [ARM] Don't include asm/elf.h in asm code 2008-10-01 16:41:10 +01:00
tlb-v3.S kbuild: arm - use generic asm-offsets.h support 2005-09-09 21:08:59 +02:00
tlb-v4.S kbuild: arm - use generic asm-offsets.h support 2005-09-09 21:08:59 +02:00
tlb-v4wb.S kbuild: arm - use generic asm-offsets.h support 2005-09-09 21:08:59 +02:00
tlb-v4wbi.S kbuild: arm - use generic asm-offsets.h support 2005-09-09 21:08:59 +02:00
tlb-v6.S [ARM] 4129/1: Add barriers after the TLB operations 2007-02-08 14:49:27 +00:00
tlb-v7.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00