[Xen-changelog] [xen master] x86emul: simplify prefix handling for VMFUNC

[patchbot@xxxxxxx]

commit be832fdc089af84f393f1c8d234c5944d5a2b4e3
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jan 19 10:34:21 2017 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jan 19 10:34:21 2017 +0100

    x86emul: simplify prefix handling for VMFUNC
    
    LOCK prefixes get dealt with elsewhere, and 66, F2, and F3 can all be
    checked for in one go by looking at vex.pfx.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/x86_emulate/x86_emulate.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c 
b/xen/arch/x86/x86_emulate/x86_emulate.c
index d264d59..880d565 100644
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -4690,8 +4690,7 @@ x86_emulate(
 #endif
 
         case 0xd4: /* vmfunc */
-            generate_exception_if(lock_prefix | rep_prefix() | (vex.pfx == 
vex_66),
-                                  EXC_UD);
+            generate_exception_if(vex.pfx, EXC_UD);
             fail_if(!ops->vmfunc);
             if ( (rc = ops->vmfunc(ctxt)) != X86EMUL_OKAY )
                 goto done;
--
generated by git-patchbot for /home/xen/git/xen.git#master

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