[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-changelog] [xen-unstable] [XEN] IOPL is ignored for VM86 mode port accesses. Fix Xen



# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 5a0ed6c476732da229c3307ea5357cdd196e5462
# Parent  49f65e2b0f1c5b96326c764808e819af85e883d7
[XEN] IOPL is ignored for VM86 mode port accesses. Fix Xen
emulation to match native behaviour.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
 xen/arch/x86/traps.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -r 49f65e2b0f1c -r 5a0ed6c47673 xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      Fri Jun 09 14:25:46 2006 +0100
+++ b/xen/arch/x86/traps.c      Fri Jun 09 14:29:00 2006 +0100
@@ -748,7 +748,8 @@ static inline int guest_io_okay(
 #define TOGGLE_MODE() ((void)0)
 #endif
 
-    if ( v->arch.iopl >= (guest_kernel_mode(v, regs) ? 1 : 3) )
+    if ( !vm86_mode(regs) &&
+         (v->arch.iopl >= (guest_kernel_mode(v, regs) ? 1 : 3)) )
         return 1;
 
     if ( v->arch.iobmp_limit > (port + bytes) )

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.