[Xen-changelog] [xen master] x86emul: suppress alignment check for {, v}mov{d, q}

[patchbot@xxxxxxx]

commit 8dd7b8a8934e5d8bda9a07ef281cd8f8a4ee1e26
Author:     Jan Beulich <JBeulich@xxxxxxxx>
AuthorDate: Thu Nov 10 05:29:32 2016 -0700
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Sat Nov 12 06:45:16 2016 +0000

    x86emul: suppress alignment check for {,v}mov{d,q}
    
    When introducing support for these instructions, adjustment for the
    alignment check logic (generating #GP(0)) was overlooked.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Release-acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/x86_emulate/x86_emulate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c 
b/xen/arch/x86/x86_emulate/x86_emulate.c
index 67ef31d..2621487 100644
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -4940,7 +4940,7 @@ x86_emulate(
         {
             uint32_t mxcsr = 0;
 
-            if ( vex.pfx != vex_66 )
+            if ( ea.bytes < 16 || vex.pfx == vex_f3 )
                 mxcsr = MXCSR_MM;
             else if ( vcpu_has_misalignsse() )
                 asm ( "stmxcsr %0" : "=m" (mxcsr) );
--
generated by git-patchbot for /home/xen/git/xen.git#master

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