[Xen-devel] [PATCH v5 15/17] x86emul: support PCLMULQDQ

["Jan Beulich" <JBeulich@xxxxxxxx>]

... and its AVX equivalent.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v3: New.

--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -398,6 +398,7 @@ static const struct {
     [0x22] = { .simd_size = simd_none },
     [0x40 ... 0x41] = { .simd_size = simd_packed_fp },
     [0x42] = { .simd_size = simd_packed_int },
+    [0x44] = { .simd_size = simd_packed_int },
     [0x4a ... 0x4b] = { .simd_size = simd_packed_fp, .four_op = 1 },
     [0x4c] = { .simd_size = simd_packed_int, .four_op = 1 },
     [0x60 ... 0x63] = { .simd_size = simd_packed_int, .two_op = 1 },
@@ -1467,6 +1468,7 @@ static bool vcpu_has(
 #define vcpu_has_sse()         vcpu_has(         1, EDX, 25, ctxt, ops)
 #define vcpu_has_sse2()        vcpu_has(         1, EDX, 26, ctxt, ops)
 #define vcpu_has_sse3()        vcpu_has(         1, ECX,  0, ctxt, ops)
+#define vcpu_has_pclmulqdq()   vcpu_has(         1, ECX,  1, ctxt, ops)
 #define vcpu_has_ssse3()       vcpu_has(         1, ECX,  9, ctxt, ops)
 #define vcpu_has_cx16()        vcpu_has(         1, ECX, 13, ctxt, ops)
 #define vcpu_has_sse4_1()      vcpu_has(         1, ECX, 19, ctxt, ops)
@@ -7469,6 +7471,14 @@ x86_emulate(
         generate_exception_if(vex.l, EXC_UD);
         goto simd_0f_imm8_avx;
 
+    case X86EMUL_OPC_66(0x0f3a, 0x44):     /* pclmulqdq $imm8,xmm/m128,xmm */
+    case X86EMUL_OPC_VEX_66(0x0f3a, 0x44): /* vpclmulqdq 
$imm8,xmm/m128,xmm,xmm */
+        host_and_vcpu_must_have(pclmulqdq);
+        if ( vex.opcx == vex_none )
+            goto simd_0f3a_common;
+        generate_exception_if(vex.l, EXC_UD);
+        goto simd_0f_imm8_avx;
+
     case X86EMUL_OPC_VEX_66(0x0f3a, 0x4a): /* vblendvps 
{x,y}mm,{x,y}mm/mem,{x,y}mm,{x,y}mm */
     case X86EMUL_OPC_VEX_66(0x0f3a, 0x4b): /* vblendvpd 
{x,y}mm,{x,y}mm/mem,{x,y}mm,{x,y}mm */
         generate_exception_if(vex.w, EXC_UD);
--- a/xen/include/asm-x86/cpufeature.h
+++ b/xen/include/asm-x86/cpufeature.h
@@ -42,6 +42,7 @@
 #define cpu_has_ssse3          boot_cpu_has(X86_FEATURE_SSSE3)
 #define cpu_has_sse4_1         boot_cpu_has(X86_FEATURE_SSE4_1)
 #define cpu_has_sse4_2         boot_cpu_has(X86_FEATURE_SSE4_2)
+#define cpu_has_pclmulqdq      boot_cpu_has(X86_FEATURE_PCLMULQDQ)
 #define cpu_has_popcnt         boot_cpu_has(X86_FEATURE_POPCNT)
 #define cpu_has_htt            boot_cpu_has(X86_FEATURE_HTT)
 #define cpu_has_nx             boot_cpu_has(X86_FEATURE_NX)

Attachment: x86emul-PCLMULQDQ.patch
Description: Text document

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