[Xen-changelog] [xen master] x86emul: permit SAE for V{, U}COMIS{S, D}

[patchbot@xxxxxxx]

commit 529ccf68e87aa7b85d4a9db4c5af6e54e0ac3b85
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Dec 18 18:03:49 2018 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Dec 18 18:03:49 2018 +0100

    x86emul: permit SAE for V{,U}COMIS{S,D}
    
    The avx512_vlen_check() invocation needs to be conditional.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/x86_emulate/x86_emulate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c 
b/xen/arch/x86/x86_emulate/x86_emulate.c
index 20510151c8..9aebb1b662 100644
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -6187,7 +6187,8 @@ x86_emulate(
                                evex.w != evex.pfx),
                               EXC_UD);
         host_and_vcpu_must_have(avx512f);
-        avx512_vlen_check(true);
+        if ( !evex.br )
+            avx512_vlen_check(true);
         get_fpu(X86EMUL_FPU_zmm);
 
         opc = init_evex(stub);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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