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d7dd2ff11b
linux/arch/parisc/kernel
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James Bottomley d7dd2ff11b [PARISC] only make executable areas executable 
Currently parisc has the whole kernel marked as RWX, meaning any
kernel page at all is eligible to be executed.  This can cause a
theoretical problem on systems with combined I/D TLB because the act
of referencing a page causes a TLB insertion with an executable bit.
This TLB entry may be used by the CPU as the basis for speculating the
page into the I-Cache.  If this speculated page is subsequently used
for a user process, there is the possibility we will get a stale
I-cache line picked up as the binary executes.

As a point of good practise, only mark actual kernel text pages as
executable.  The same has to be done for init_text pages, but they're
converted to data pages (and the I-Cache flushed) when the init memory
is released.

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-04-15 12:55:18 -05:00
..
.gitignore parisc: add arch/parisc/kernel/.gitignore 2008-10-10 16:32:28 +00:00
asm-offsets.c parisc: Use of align_frame provides stack frame. 2010-05-30 05:38:27 -04:00
binfmt_elf32.c [PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY 2008-10-16 15:40:05 +02:00
cache.c parisc: flush pages through tmpalias space 2011-01-15 08:44:40 -06:00
drivers.c parisc: add uevent helper for parisc bus 2009-01-05 19:11:59 +00:00
entry.S [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00
firmware.c parisc : Remove broken line wrapping handling pdc_iodc_print() 2011-01-15 08:39:08 -06:00
ftrace.c sched_clock: Add local_clock() API and improve documentation 2010-06-09 10:34:49 +02:00
hardware.c [PARISC] add back Crestone Peak cpu 2008-03-15 19:12:19 -07:00
head.S [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00
hpmc.S parisc: export length of os_hpmc vector 2009-01-05 19:18:27 +00:00
init_task.c Rename .data.vmpages and .data.vm0.XXX to .data..vmpages and .data..vm0.XXX. 2010-03-03 11:26:00 +01:00
inventory.c Fix common misspellings 2011-03-31 11:26:23 -03:00
irq.c parisc: Use irq_to_desc() in show_interrupts() 2011-03-29 14:48:08 +02:00
Makefile parisc: add ftrace (function and graph tracer) functionality 2009-03-31 02:51:34 +00:00
module.c [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00
pa7300lc.c
pacache.S parisc: flush pages through tmpalias space 2011-01-15 08:44:40 -06:00
parisc_ksyms.c parisc: add ftrace (function and graph tracer) functionality 2009-03-31 02:51:34 +00:00
pci-dma.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
pci.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
pdc_chassis.c
pdc_cons.c console: rename acquire/release_console_sem() to console_lock/unlock() 2011-01-26 10:50:06 +10:00
perf_asm.S Revert "parisc: fix trivial section name warnings" 2008-06-13 10:49:45 -04:00
perf_images.h
perf.c parisc: remove big kernel lock 2010-10-16 22:43:08 +02:00
process.c Make do_execve() take a const filename pointer 2010-08-17 18:07:43 -07:00
processor.c parisc: processor.c, fix bloated stack frame 2009-07-03 03:34:11 +00:00
ptrace.c ptrace: cleanup arch_ptrace() on parisc 2010-10-27 18:03:11 -07:00
real2.S parisc: move pdc_result to real2.S 2008-10-10 16:32:28 +00:00
setup.c parisc: remove CVS keywords 2009-07-03 03:34:06 +00:00
signal32.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
signal32.h
signal.c Fix common misspellings 2011-03-31 11:26:23 -03:00
smp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
stacktrace.c parisc: add LATENCYTOP_SUPPORT and CONFIG_STACKTRACE_SUPPORT 2009-03-31 02:51:34 +00:00
sys32.h
sys_parisc32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
sys_parisc.c improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
syscall_table.S Fix common misspellings 2011-03-31 11:26:23 -03:00
syscall.S Fix common misspellings 2011-03-31 11:26:23 -03:00
time.c parisc: Switch do_timer() to xtime_update() 2011-01-31 14:55:46 +01:00
topology.c parisc: Replace NR_CPUS in parisc code 2009-01-05 19:09:02 +00:00
traps.c parisc: fix warning in traps.c 2009-08-28 19:37:20 -10:00
unaligned.c arch/parisc: Removing undead ifdef CONFIG_PA20 2010-10-21 21:13:29 -04:00
unwind.c parisc: unwind - optimise linked-list searches for modules 2010-10-21 21:12:19 -04:00
vmlinux.lds.S [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00