[Xen-changelog] [xen staging] x86emul: correct AVX512BW write masking checks

[patchbot@xxxxxxx]

commit f5d7d370400613a01ca1c9e38d7ce9b1faea32f3
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jan 31 11:38:24 2019 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jan 31 11:38:24 2019 +0100

    x86emul: correct AVX512BW write masking checks
    
    For VPSADBW this likely was a result of bad copy-and-paste.
    
    For VPS{L,R}LDQ comment and code were not in line, but then again the
    comment also wasn't fully updated from the AVX2 original it got cloned
    from.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Release-acked-by: Juergen Gross <jgross@xxxxxxxx>
---
 xen/arch/x86/x86_emulate/x86_emulate.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c 
b/xen/arch/x86/x86_emulate/x86_emulate.c
index 717e02fe67..e3b7e8c396 100644
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -6633,11 +6633,13 @@ x86_emulate(
         get_fpu(X86EMUL_FPU_mmx);
         goto simd_0f_common;
 
+    case X86EMUL_OPC_EVEX_66(0x0f, 0xf6): /* vpsadbw 
[xyz]mm/mem,[xyz]mm,[xyz]mm */
+        generate_exception_if(evex.opmsk, EXC_UD);
+        /* fall through */
     case X86EMUL_OPC_EVEX_66(0x0f, 0xd1): /* vpsrlw 
xmm/m128,[xyz]mm,[xyz]mm{k} */
     case X86EMUL_OPC_EVEX_66(0x0f, 0xe1): /* vpsraw 
xmm/m128,[xyz]mm,[xyz]mm{k} */
     case X86EMUL_OPC_EVEX_66(0x0f, 0xf1): /* vpsllw 
xmm/m128,[xyz]mm,[xyz]mm{k} */
     case X86EMUL_OPC_EVEX_66(0x0f, 0xf5): /* vpmaddwd 
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
-    case X86EMUL_OPC_EVEX_66(0x0f, 0xf6): /* vpsadbw 
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
         fault_suppression = false;
         /* fall through */
     case X86EMUL_OPC_EVEX_66(0x0f, 0xd5): /* vpmullw 
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
@@ -6998,8 +7000,9 @@ x86_emulate(
         case 6: /* vpsllq $imm8,[xyz]mm/mem,[xyz]mm{k} */
             generate_exception_if(!evex.w, EXC_UD);
             goto avx512f_shift_imm;
-        case 3: /* vpsrldq $imm8,{x,y}mm,{x,y}mm */
-        case 7: /* vpslldq $imm8,{x,y}mm,{x,y}mm */
+        case 3: /* vpsrldq $imm8,[xyz]mm/mem,[xyz]mm */
+        case 7: /* vpslldq $imm8,[xyz]mm/mem,[xyz]mm */
+            generate_exception_if(evex.opmsk, EXC_UD);
             goto avx512bw_shift_imm;
         }
         goto unrecognized_insn;
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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