q3k
/
linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux/arch/arm/mm
History
Leif Lindholm 64d2dc384e ARM: 6396/1: Add SWP/SWPB emulation for ARMv7 processors 
The SWP instruction was deprecated in the ARMv6 architecture,
superseded by the LDREX/STREX family of instructions for
load-linked/store-conditional operations. The ARMv7 multiprocessing
extensions mandate that SWP/SWPB instructions are treated as undefined
from reset, with the ability to enable them through the System Control
Register SW bit.

This patch adds the alternative solution to emulate the SWP and SWPB
instructions using LDREX/STREX sequences, and log statistics to
/proc/cpu/swp_emulation. To correctly deal with copy-on-write, it also
modifies cpu_v7_set_pte_ext to change the mappings to priviliged RO when
user RO.

Signed-off-by: Leif Lindholm <leif.lindholm@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
 		2010-11-04 15:45:24 +00:00
..
Kconfig ARM: 6396/1: Add SWP/SWPB emulation for ARMv7 processors 2010-11-04 15:45:24 +00:00
Makefile ARM: Remove DISCONTIGMEM support 2010-07-16 10:57:35 +01:00
abort-ev4.S
…
abort-ev4t.S
…
abort-ev5t.S
…
abort-ev5tj.S
…
abort-ev6.S
…
abort-ev7.S arm: mm: qsd8x50: Fix incorrect permission faults 2010-05-03 11:15:05 -07:00
abort-lv4t.S
…
abort-macro.S
…
abort-nommu.S
…
alignment.c ARM: 6401/1: plug a race in the alignment trap handler 2010-09-23 15:17:04 +01:00
cache-fa.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-feroceon-l2.c
…
cache-l2x0.c ARM: l2x0: Optimise the range based operations 2010-10-26 11:40:05 +05:30
cache-tauros2.c
…
cache-v3.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v4.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v4wb.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v4wt.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v6.S ARM: 6405/1: Handle __flush_icache_all for CONFIG_SMP_ON_UP 2010-10-04 20:23:36 +01:00
cache-v7.S ARM: 6405/1: Handle __flush_icache_all for CONFIG_SMP_ON_UP 2010-10-04 20:23:36 +01:00
cache-xsc3l2.c
…
context.c ARM: 5905/1: ARM: Global ASID allocation on SMP 2010-02-15 21:39:51 +00:00
copypage-fa.c ARM: Gemini: fix compiler error in copypage-fa.c 2010-04-27 12:45:10 +02:00
copypage-feroceon.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-v3.c
…
copypage-v4mc.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
copypage-v4wb.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-v4wt.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-v6.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
copypage-xsc3.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-xscale.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
dma-mapping.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
extable.c
…
fault-armv.c ARM: 6464/2: fix spinlock recursion in adjust_pte() 2010-10-28 13:53:47 +01:00
fault.c ARM: 6355/1: hw-breakpoint: add mechanism for hooking into prefetch aborts 2010-09-08 10:04:59 +01:00
fault.h
…
flush.c ARM: 6386/1: flush_ptrace_access: invalidate correct I-cache alias 2010-10-04 20:57:10 +01:00
highmem.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
init.c ARM: memblock: move meminfo into find_limits directly 2010-10-28 13:54:44 +01:00
iomap.c
…
ioremap.c ARM: relax ioremap prohibition (309caa9) for -final and -stable 2010-10-13 00:19:03 +01:00
mm.h ARM: Convert platform reservations to use LMB rather than bootmem 2010-07-27 08:48:23 +01:00
mmap.c ARM: implement CONFIG_STRICT_DEVMEM by disabling access to RAM via /dev/mem 2010-10-01 22:31:34 -04:00
mmu.c ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs 2010-11-04 15:44:31 +00:00
nommu.c ARM: Convert platform reservations to use LMB rather than bootmem 2010-07-27 08:48:23 +01:00
pabort-legacy.S
…
pabort-v6.S
…
pabort-v7.S
…
pgd.c mm: remove pte_*map_nested() 2010-10-26 16:52:08 -07:00
proc-arm6_7.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm7tdmi.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm9tdmi.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm720.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm740.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm920.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm922.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm925.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm926.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm940.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm946.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1020.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1020e.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1022.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1026.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-fa526.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-feroceon.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-macros.S ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs 2010-11-04 15:44:31 +00:00
proc-mohawk.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-sa110.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-sa1100.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-syms.c
…
proc-v6.S Merge branch 'hotplug' into devel 2010-10-18 22:34:47 +01:00
proc-v7.S ARM: 6396/1: Add SWP/SWPB emulation for ARMv7 processors 2010-11-04 15:45:24 +00:00
proc-xsc3.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-xscale.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
tlb-fa.S
…
tlb-v3.S
…
tlb-v4.S
…
tlb-v4wb.S
…
tlb-v4wbi.S
…
tlb-v6.S
…
tlb-v7.S ARM: Allow SMP kernels to boot on UP systems 2010-10-04 20:23:36 +01:00
vmregion.c ARM: DMA coherent allocator: align remapped addresses 2010-07-27 10:43:48 +01:00
vmregion.h ARM: DMA coherent allocator: align remapped addresses 2010-07-27 10:43:48 +01:00