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b7d4581844
linux/arch/parisc/kernel
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James Bottomley b7d4581844 [PARISC] prevent speculative re-read on cache flush 
According to Appendix F, the TLB is the primary arbiter of speculation.
Thus, if a page has a TLB entry, it may be speculatively read into the
cache.  On linux, this can cause us incoherencies because if we're about
to do a disk read, we call get_user_pages() to do the flush/invalidate
in user space, but we still potentially have the user TLB entries, and
the cache could speculate the lines back into userspace (thus causing
stale data to be used).  This is fixed by purging the TLB entries before
we flush through the tmpalias space.  Now, the only way the line could
be re-speculated is if the user actually tries to touch it (which is not
allowed).

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-04-15 12:55:56 -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] prevent speculative re-read on cache flush 2011-04-15 12:55:56 -05:00
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 [PARISC] Work around machines which do not support chassis warnings 2006-06-27 23:28:37 +00:00
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 [PARISC] spelling fixes: arch/parisc/ 2007-05-22 22:52:16 -04:00
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