From: Jan Beulich <jbeulich@suse.com>
Date: Tue, 18 Dec 2018 17:03:49 +0000 (+0100)
Subject: x86emul: permit SAE for V{,U}COMIS{S,D}
X-Git-Tag: xen-pt-allocation-1.1-base~179
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=529ccf68e87aa7b85d4a9db4c5af6e54e0ac3b85;p=people%2Fliuw%2Fxen.git

x86emul: permit SAE for V{,U}COMIS{S,D}

The avx512_vlen_check() invocation needs to be conditional.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
---

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);