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3 Commits

Author SHA1 Message Date
Paolo Ciarrocchi
d9336a9b47 x86: coding style fixes to arch/x86/kernel/paravirt_patch_32.c 
Before:
total: 3 errors, 1 warnings, 49 lines checked

After:
total: 2 errors, 1 warnings, 49 lines checked

paolo@paolo-desktop:~/linux.trees.git$ md5sum /tmp/paravirt_patch_32.o.*
a78eea4264723e18c49dcfbe0ee0aae7  /tmp/paravirt_patch_32.o.after
a78eea4264723e18c49dcfbe0ee0aae7  /tmp/paravirt_patch_32.o.before

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2008-08-15 16:53:25 +02:00
Jeremy Fitzhardinge
d75cd22fdd x86/paravirt: split sysret and sysexit 
Don't conflate sysret and sysexit; they're different instructions with
different semantics, and may be in use at the same time (at least
within the same kernel, depending on whether its an Intel or AMD
system).

sysexit - just return to userspace, does no register restoration of
    any kind; must explicitly atomically enable interrupts.

sysret - reloads flags from r11, so no need to explicitly enable
    interrupts on 64-bit, responsible for restoring usermode %gs

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citirx.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2008-07-08 13:13:15 +02:00
Glauber de Oliveira Costa
2f485ef568 x86: move patching code to arch-specific file. 
The core patching code for paravirt is sufficiently different
among i386 and x86_64, and we move them to specific files.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2008-01-30 13:32:10 +01:00