x86: Fix NMI injection to PV guests

Signed-off-by: Juergen Gross <juergen.gross@ts.fujitsu.com>
xen-unstable changeset:   21926:6f07d9ac1e7c
xen-unstable date:        Thu Aug 05 14:41:14 2010 +0100

xen/arch/x86/x86_32/entry.S

@@ -275,7 +275,7 @@ process_mce:
         ALIGN
 /* %ebx: struct vcpu */
 process_nmi:
-        cmpw $1 << VCPU_TRAP_NMI,VCPU_async_exception_mask(%ebx)
+        testb $1 << VCPU_TRAP_NMI,VCPU_async_exception_mask(%ebx)
         jnz  test_guest_events
         sti
         movb $0,VCPU_nmi_pending(%ebx)

xen/arch/x86/x86_64/compat/entry.S

@@ -148,7 +148,7 @@ compat_process_mce:
 	ALIGN
 /* %rbx: struct vcpu */
 compat_process_nmi:
-        cmpw $1 << VCPU_TRAP_NMI,VCPU_async_exception_mask(%rbx)
+        testb $1 << VCPU_TRAP_NMI,VCPU_async_exception_mask(%rbx)
         jnz  compat_test_guest_events
         sti
         movb  $0,VCPU_nmi_pending(%rbx)

xen/arch/x86/x86_64/entry.S

@@ -250,7 +250,7 @@ process_mce:
         ALIGN
 /* %rbx: struct vcpu */
 process_nmi:
-        cmpw $1 << VCPU_TRAP_NMI,VCPU_async_exception_mask(%rbx)
+        testb $1 << VCPU_TRAP_NMI,VCPU_async_exception_mask(%rbx)
         jnz  test_guest_events
         sti
         movb $0,VCPU_nmi_pending(%rbx)