kernel-ark/arch/parisc
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
..
configs kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
hpux clean statfs-like syscalls up 2011-03-14 09:15:28 -04:00
include/asm [PARISC] prevent speculative re-read on cache flush 2011-04-15 12:55:56 -05:00
kernel [PARISC] prevent speculative re-read on cache flush 2011-04-15 12:55:56 -05:00
lib parisc: add strict copy size checks (v2) 2010-03-06 22:54:09 +00:00
math-emu Fix common misspellings 2011-03-31 11:26:23 -03:00
mm [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00
oprofile
defpalo.conf
install.sh
Kconfig genirq: Remove the now obsolete config options and select statements 2011-03-30 14:13:23 +02:00
Kconfig.debug parisc: add strict copy size checks (v2) 2010-03-06 22:54:09 +00:00
Makefile
nm