Jeremy Fitzhardinge a789ed5fb6 xen: cache cr0 value to avoid trap'n'emulate for read_cr0 ...

stts() is implemented in terms of read_cr0/write_cr0 to update the
state of the TS bit.  This happens during context switch, and so
is fairly performance critical.  Rather than falling back to
a trap-and-emulate native read_cr0, implement our own by caching
the last-written value from write_cr0 (the TS bit is the only one
we really care about).

Impact: optimise Xen context switches
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

2009-05-08 15:55:24 -07:00

..

debugfs.c

xen: add debugfs support

2008-08-21 13:52:58 +02:00

debugfs.h

xen: add debugfs support

2008-08-21 13:52:58 +02:00

enlighten.c

xen: cache cr0 value to avoid trap'n'emulate for read_cr0

2009-05-08 15:55:24 -07:00

grant-table.c

xen: make grant table arch portable

2008-04-24 23:57:32 +02:00

irq.c

xen: use our own eventchannel->irq path

2009-02-09 12:17:30 +01:00

Kconfig

x86: remove the Voyager 32-bit subarch

2009-02-23 00:54:01 +01:00

Makefile

xen: make direct versions of irq_enable/disable/save/restore to common code

2009-02-04 16:59:04 -08:00

mmu.c

Merge branch 'x86/urgent' into x86/xen

2009-05-08 10:50:00 +02:00

mmu.h

xen: separate p2m allocation from setting

2009-04-08 11:51:44 -07:00

multicalls.c

x86, xen: do multicall callbacks with interrupts disabled

2009-02-16 08:56:41 +01:00

multicalls.h

Merge commit 'v2.6.29-rc4' into core/percpu

2009-02-09 14:58:11 +01:00

setup.c

xen: reserve Xen start_info rather than e820 reserving

2009-05-08 10:51:03 +02:00

smp.c

NULL noise: arch/x86/xen/smp.c

2009-04-08 11:51:45 -07:00

spinlock.c

genirq: revert dynarray

2008-10-16 16:53:15 +02:00

suspend.c

x86, xen: fix hardirq.h merge fallout

2009-01-23 11:09:15 +01:00

time.c

clocksource: pass clocksource to read() callback

2009-04-21 13:41:47 -07:00

vdso.h

i386: move xen

2007-10-11 11:16:51 +02:00

xen-asm_32.S

x86: style cleanups for xen assemblies

2009-02-05 20:25:41 +01:00

xen-asm_64.S

x86: style cleanups for xen assemblies

2009-02-05 20:25:41 +01:00

xen-asm.h

xen: make direct versions of irq_enable/disable/save/restore to common code

2009-02-04 16:59:04 -08:00

xen-asm.S

x86: style cleanups for xen assemblies

2009-02-05 20:25:41 +01:00

xen-head.S

x86: use _types.h headers in asm where available

2009-02-13 11:35:01 -08:00

xen-ops.h

xen/mmu: some early pagetable cleanups

2009-04-08 14:25:45 -07:00