| 4e7682d077d693e34a993ae7a2831b522930ebcb |
|
25-Jan-2012 |
Catalin Marinas <catalin.marinas@arm.com> |
ARM: 7301/1: Rename the T() macro to TUSER() to avoid namespace conflicts
This macro is used to generate unprivileged accesses (LDRT/STRT) to user
space.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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| 247055aa21ffef1c49dd64710d5e94c2aee19b58 |
|
13-Sep-2010 |
Catalin Marinas <catalin.marinas@arm.com> |
ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs
This patch removes the domain switching functionality via the set_fs and
__switch_to functions on cores that have a TLS register.
Currently, the ioremap and vmalloc areas share the same level 1 page
tables and therefore have the same domain (DOMAIN_KERNEL). When the
kernel domain is modified from Client to Manager (via the __set_fs or in
the __switch_to function), the XN (eXecute Never) bit is overridden and
newer CPUs can speculatively prefetch the ioremap'ed memory.
Linux performs the kernel domain switching to allow user-specific
functions (copy_to/from_user, get/put_user etc.) to access kernel
memory. In order for these functions to work with the kernel domain set
to Client, the patch modifies the LDRT/STRT and related instructions to
the LDR/STR ones.
The user pages access rights are also modified for kernel read-only
access rather than read/write so that the copy-on-write mechanism still
works. CPU_USE_DOMAINS gets disabled only if the hardware has a TLS register
(CPU_32v6K is defined) since writing the TLS value to the high vectors page
isn't possible.
The user addresses passed to the kernel are checked by the access_ok()
function so that they do not point to the kernel space.
Tested-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 4260415f6a3b92c5c986398d96c314df37a4ccbf |
|
19-Apr-2010 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: fix build error in arch/arm/kernel/process.c
/tmp/ccJ3ssZW.s: Assembler messages:
/tmp/ccJ3ssZW.s:1952: Error: can't resolve `.text' {.text section} - `.LFB1077'
This is caused because:
.section .data
.section .text
.section .text
.previous
does not return us to the .text section, but the .data section; this
makes use of .previous dangerous if the ordering of previous sections
is not known.
Fix up the other users of .previous; .pushsection and .popsection are
a safer pairing to use than .section and .previous.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 8b592783a2e8b7721a99730bd549aab5208f36af |
|
24-Jul-2009 |
Catalin Marinas <catalin.marinas@arm.com> |
Thumb-2: Implement the unified arch/arm/lib functions
This patch adds the ARM/Thumb-2 unified support for the arch/arm/lib/*
files.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
|
| 93ed3970114983543bbebd195bef65db84444ea2 |
|
28-Aug-2008 |
Catalin Marinas <catalin.marinas@arm.com> |
[ARM] 5227/1: Add the ENDPROC declarations to the .S files
This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
instructions in Thumb-2.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 4baa9922430662431231ac637adedddbb0cfb2d7 |
|
02-Aug-2008 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] move include/asm-arm to arch/arm/include/asm
Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/plat* alone.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 235b185ce47ce64793362bd3ae4bcd8afc6b57b8 |
|
04-Mar-2007 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] getuser.S and putuser.S don't need thread_info.h nor asm-offsets.h
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| d2c5b69099ff747f9757da2416383b9a999171b1 |
|
18-Nov-2005 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] Fix get_user when passed a const pointer
Unfortunately, later gcc versions error out when our get_user is passed
a const pointer, since we write to a temporary variable declared as
typeof(*(p)) which propagates the const-ness.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| e6ae744dd2eae8e00af328b11b1fe77cb0931136 |
|
09-Sep-2005 |
Sam Ravnborg <sam@mars.(none)> |
kbuild: arm - use generic asm-offsets.h support
Delete obsoleted stuff from arch Makefile and rename
constants.h to asm-offsets.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
|
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
|
17-Apr-2005 |
Linus Torvalds <torvalds@ppc970.osdl.org> |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
|