[Xen-devel] [PATCH v8 36/50] x86emul: support AVX512CD insns

["Jan Beulich" <JBeulich@xxxxxxxx>]

Since the insns here and in particular their memory access patterns
follow the usual scheme I didn't think it was necessary to add
contrived tests specifically for them, beyond the Disp8 scaling ones.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v6: New.

--- a/tools/tests/x86_emulator/evex-disp8.c
+++ b/tools/tests/x86_emulator/evex-disp8.c
@@ -458,6 +458,13 @@ static const struct test avx512bw_128[]
     INSN(pinsrw, 66,   0f, c4, el, w, el),
 };
 
+static const struct test avx512cd_all[] = {
+//       pbroadcastmb2q, f3, 0f38, 2a,      q
+//       pbroadcastmw2d, f3, 0f38, 3a,      d
+    INSN(pconflict,      66, 0f38, c4, vl, dq, vl),
+    INSN(plzcnt,         66, 0f38, 44, vl, dq, vl),
+};
+
 static const struct test avx512dq_all[] = {
     INSN_PFP(and,              0f, 54),
     INSN_PFP(andn,             0f, 55),
@@ -903,6 +910,7 @@ void evex_disp8_test(void *instr, struct
     RUN(avx512f, 512);
     RUN(avx512bw, all);
     RUN(avx512bw, 128);
+    RUN(avx512cd, all);
     RUN(avx512dq, all);
     RUN(avx512dq, 128);
     RUN(avx512dq, no128);
--- a/tools/tests/x86_emulator/x86-emulate.h
+++ b/tools/tests/x86_emulator/x86-emulate.h
@@ -138,6 +138,7 @@ static inline bool xcr0_mask(uint64_t ma
 #define cpu_has_avx512f   (cp.feat.avx512f  && xcr0_mask(0xe6))
 #define cpu_has_avx512dq  (cp.feat.avx512dq && xcr0_mask(0xe6))
 #define cpu_has_avx512er  (cp.feat.avx512er && xcr0_mask(0xe6))
+#define cpu_has_avx512cd  (cp.feat.avx512cd && xcr0_mask(0xe6))
 #define cpu_has_avx512bw  (cp.feat.avx512bw && xcr0_mask(0xe6))
 #define cpu_has_avx512vl  (cp.feat.avx512vl && xcr0_mask(0xe6))
 #define cpu_has_avx512_vbmi (cp.feat.avx512_vbmi && xcr0_mask(0xe6))
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -473,6 +473,7 @@ static const struct ext0f38_table {
     [0x41] = { .simd_size = simd_packed_int, .two_op = 1 },
     [0x42] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
     [0x43] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
+    [0x44] = { .simd_size = simd_packed_int, .two_op = 1, .d8s = d8s_vl },
     [0x45 ... 0x47] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
     [0x4c] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
     [0x4d] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
@@ -525,6 +526,7 @@ static const struct ext0f38_table {
     [0xbd] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
     [0xbe] = { .simd_size = simd_packed_fp, .d8s = d8s_vl },
     [0xbf] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
+    [0xc4] = { .simd_size = simd_packed_int, .two_op = 1, .d8s = d8s_vl },
     [0xc6 ... 0xc7] = { .simd_size = simd_other, .vsib = 1, .d8s = d8s_dq },
     [0xc8] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
     [0xc9] = { .simd_size = simd_other },
@@ -1906,6 +1908,7 @@ static bool vcpu_has(
 #define vcpu_has_clwb()        vcpu_has(         7, EBX, 24, ctxt, ops)
 #define vcpu_has_avx512pf()    vcpu_has(         7, EBX, 26, ctxt, ops)
 #define vcpu_has_avx512er()    vcpu_has(         7, EBX, 27, ctxt, ops)
+#define vcpu_has_avx512cd()    vcpu_has(         7, EBX, 28, ctxt, ops)
 #define vcpu_has_sha()         vcpu_has(         7, EBX, 29, ctxt, ops)
 #define vcpu_has_avx512bw()    vcpu_has(         7, EBX, 30, ctxt, ops)
 #define vcpu_has_avx512vl()    vcpu_has(         7, EBX, 31, ctxt, ops)
@@ -8816,6 +8819,20 @@ x86_emulate(
         evex.opcx = vex_0f;
         goto vmovdqa;
 
+    case X86EMUL_OPC_EVEX_F3(0x0f38, 0x2a): /* vpbroadcastmb2q k,[xyz]mm */
+    case X86EMUL_OPC_EVEX_F3(0x0f38, 0x3a): /* vpbroadcastmw2d k,[xyz]mm */
+        generate_exception_if((ea.type != OP_REG || evex.opmsk ||
+                               evex.w == ((b >> 4) & 1)),
+                              EXC_UD);
+        d |= TwoOp;
+        /* fall through */
+    case X86EMUL_OPC_EVEX_66(0x0f38, 0xc4): /* vpconflict{d,q} 
[xyz]mm/mem,[xyz]mm{k} */
+        fault_suppression = false;
+        /* fall through */
+    case X86EMUL_OPC_EVEX_66(0x0f38, 0x44): /* vplzcnt{d,q} 
[xyz]mm/mem,[xyz]mm{k} */
+        host_and_vcpu_must_have(avx512cd);
+        goto avx512f_no_sae;
+
     case X86EMUL_OPC_VEX_66(0x0f38, 0x2c): /* vmaskmovps mem,{x,y}mm,{x,y}mm */
     case X86EMUL_OPC_VEX_66(0x0f38, 0x2d): /* vmaskmovpd mem,{x,y}mm,{x,y}mm */
     case X86EMUL_OPC_VEX_66(0x0f38, 0x2e): /* vmaskmovps {x,y}mm,{x,y}mm,mem */
--- a/xen/include/asm-x86/cpufeature.h
+++ b/xen/include/asm-x86/cpufeature.h
@@ -103,6 +103,7 @@
 #define cpu_has_rdseed          boot_cpu_has(X86_FEATURE_RDSEED)
 #define cpu_has_smap            boot_cpu_has(X86_FEATURE_SMAP)
 #define cpu_has_avx512er        boot_cpu_has(X86_FEATURE_AVX512ER)
+#define cpu_has_avx512cd        boot_cpu_has(X86_FEATURE_AVX512CD)
 #define cpu_has_sha             boot_cpu_has(X86_FEATURE_SHA)
 #define cpu_has_avx512bw        boot_cpu_has(X86_FEATURE_AVX512BW)
 #define cpu_has_avx512vl        boot_cpu_has(X86_FEATURE_AVX512VL)




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