[Xen-devel] [PATCH] x86emul: permit SAE for V{,U}COMIS{S,D}

["Jan Beulich" <JBeulich@xxxxxxxx>]

The avx512_vlen_check() invocation needs to be conditional.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -6179,7 +6179,8 @@ 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);



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