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23002d88be
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Zachary Amsden 23002d88be [PATCH] paravirt: kpte flush 
Create a new PTE function which combines clearing a kernel PTE with the
subsequent flush.  This allows the two to be easily combined into a single
hypercall or paravirt-op.  More subtly, reverse the order of the flush for
kmap_atomic.  Instead of flushing on establishing a mapping, flush on clearing
a mapping.  This eliminates the possibility of leaving stale kmap entries
which may still have valid TLB mappings.  This is required for direct mode
hypervisors, which need to reprotect all mappings of a given page when
changing the page type from a normal page to a protected page (such as a page
table or descriptor table page).  But it also provides some nicer semantics
for real hardware, by providing extra debug-proofing against using stale
mappings, as well as ensuring that no stale mappings exist when changing the
cacheability attributes of a page, which could lead to cache conflicts when
two different types of mappings exist for the same page.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-01 00:39:34 -07:00
..
alpha [PATCH] Generic ioremap_page_range: alpha conversion 2006-10-01 00:39:31 -07:00
arm [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
arm26 [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
avr32 [PATCH] Generic ioremap_page_range: avr32 conversion 2006-10-01 00:39:31 -07:00
cris [PATCH] Generic ioremap_page_range: cris conversion 2006-10-01 00:39:31 -07:00
frv [PATCH] simplify update_times (avoid jiffies/jiffies_64 aliasing problem) 2006-09-29 09:18:15 -07:00
h8300 [PATCH] simplify update_times (avoid jiffies/jiffies_64 aliasing problem) 2006-09-29 09:18:15 -07:00
i386 [PATCH] paravirt: kpte flush 2006-10-01 00:39:34 -07:00
ia64 [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
m32r [PATCH] Generic ioremap_page_range: m32r conversion 2006-10-01 00:39:31 -07:00
m68k [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
m68knommu [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
mips [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
parisc [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
powerpc [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
ppc [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
s390 [PATCH] Vectorize aio_read/aio_write fileop methods 2006-10-01 00:39:28 -07:00
sh [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
sh64 [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
sparc [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
sparc64 [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00
um [PATCH] Remove ->rq_status from struct request 2006-09-30 20:29:23 +02:00
v850 [PATCH] proper flags type of spin_lock_irqsave() 2006-10-01 00:39:21 -07:00
x86_64 [PATCH] Generic ioremap_page_range: x86_64 conversion 2006-10-01 00:39:32 -07:00
xtensa [PATCH] kill wall_jiffies 2006-10-01 00:39:27 -07:00