Jan Beulich
2007-May-14 15:05 UTC
[Xen-devel] [PATCH] x86: suppress SYSCALL feature for 32on64 guests
.. since Xen cannot handle it.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Index: 2007-04-27/xen/arch/x86/traps.c
==================================================================---
2007-04-27.orig/xen/arch/x86/traps.c 2007-04-27 11:02:48.000000000 +0200
+++ 2007-04-27/xen/arch/x86/traps.c 2007-05-09 17:56:43.000000000 +0200
@@ -594,6 +594,8 @@ static int emulate_forced_invalid_op(str
else if ( regs->eax == 0x80000001 )
{
/* Modify Feature Information. */
+ if ( is_pv_32on64_vcpu(current) )
+ clear_bit(X86_FEATURE_SYSCALL % 32, &d);
clear_bit(X86_FEATURE_RDTSCP % 32, &d);
}
else
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