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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 38/42] x86emul: support of AVX512* population count insns
Plus the only other AVX512_BITALG one.
As in a few cases before, since the insns here and in particular their
memory access patterns follow the usual scheme, I didn't think it was
necessary to add a contrived test specifically for them, beyond the
Disp8 scaling one.
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
@@ -538,6 +538,11 @@ static const struct test avx512pf_512[]
INSNX(scatterpf1q, 66, 0f38, c7, 6, vl, sd, el),
};
+static const struct test avx512_bitalg_all[] = {
+ INSN(popcnt, 66, 0f38, 54, vl, bw, vl),
+ INSN(pshufbitqmb, 66, 0f38, 8f, vl, b, vl),
+};
+
static const struct test avx512_vbmi_all[] = {
INSN(permb, 66, 0f38, 8d, vl, b, vl),
INSN(permi2b, 66, 0f38, 75, vl, b, vl),
@@ -550,6 +555,10 @@ static const struct test avx512_vbmi2_al
INSN(pexpand, 66, 0f38, 62, vl, bw, el),
};
+static const struct test avx512_vpopcntdq_all[] = {
+ INSN(popcnt, 66, 0f38, 55, vl, dq, vl)
+};
+
static const unsigned char vl_all[] = { VL_512, VL_128, VL_256 };
static const unsigned char vl_128[] = { VL_128 };
static const unsigned char vl_no128[] = { VL_512, VL_256 };
@@ -919,6 +928,8 @@ void evex_disp8_test(void *instr, struct
RUN(avx512er, 512);
#define cpu_has_avx512pf cpu_has_avx512f
RUN(avx512pf, 512);
+ RUN(avx512_bitalg, all);
RUN(avx512_vbmi, all);
RUN(avx512_vbmi2, all);
+ RUN(avx512_vpopcntdq, all);
}
--- a/tools/tests/x86_emulator/x86-emulate.h
+++ b/tools/tests/x86_emulator/x86-emulate.h
@@ -143,6 +143,8 @@ static inline bool xcr0_mask(uint64_t ma
#define cpu_has_avx512vl (cp.feat.avx512vl && xcr0_mask(0xe6))
#define cpu_has_avx512_vbmi (cp.feat.avx512_vbmi && xcr0_mask(0xe6))
#define cpu_has_avx512_vbmi2 (cp.feat.avx512_vbmi2 && xcr0_mask(0xe6))
+#define cpu_has_avx512_bitalg (cp.feat.avx512_bitalg && xcr0_mask(0xe6))
+#define cpu_has_avx512_vpopcntdq (cp.feat.avx512_vpopcntdq && xcr0_mask(0xe6))
#define cpu_has_xgetbv1 (cpu_has_xsave && cp.xstate.xgetbv1)
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -479,6 +479,7 @@ static const struct ext0f38_table {
[0x4d] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
[0x4e] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
[0x4f] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
+ [0x54 ... 0x55] = { .simd_size = simd_packed_int, .two_op = 1, .d8s =
d8s_vl },
[0x58] = { .simd_size = simd_other, .two_op = 1, .d8s = 2 },
[0x59] = { .simd_size = simd_other, .two_op = 1, .d8s = 3 },
[0x5a] = { .simd_size = simd_128, .two_op = 1, .d8s = 4 },
@@ -501,6 +502,7 @@ static const struct ext0f38_table {
[0x8c] = { .simd_size = simd_packed_int },
[0x8d] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x8e] = { .simd_size = simd_packed_int, .to_mem = 1 },
+ [0x8f] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x90 ... 0x93] = { .simd_size = simd_other, .vsib = 1, .d8s = d8s_dq },
[0x96 ... 0x98] = { .simd_size = simd_packed_fp, .d8s = d8s_vl },
[0x99] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
@@ -1915,6 +1917,8 @@ static bool vcpu_has(
#define vcpu_has_avx512vl() vcpu_has( 7, EBX, 31, ctxt, ops)
#define vcpu_has_avx512_vbmi() vcpu_has( 7, ECX, 1, ctxt, ops)
#define vcpu_has_avx512_vbmi2() vcpu_has( 7, ECX, 6, ctxt, ops)
+#define vcpu_has_avx512_bitalg() vcpu_has( 7, ECX, 12, ctxt, ops)
+#define vcpu_has_avx512_vpopcntdq() vcpu_has( 7, ECX, 14, ctxt, ops)
#define vcpu_has_rdpid() vcpu_has( 7, ECX, 22, ctxt, ops)
#define vcpu_has_clzero() vcpu_has(0x80000008, EBX, 0, ctxt, ops)
@@ -8876,6 +8880,19 @@ x86_emulate(
generate_exception_if(vex.l, EXC_UD);
goto simd_0f_avx;
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x8f): /* vpshufbitqmb
[xyz]mm/mem,[xyz]mm,k{k} */
+ generate_exception_if(evex.w || !evex.r || !evex.R || evex.z, EXC_UD);
+ /* fall through */
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x54): /* vpopcnt{b,w}
[xyz]mm/mem,[xyz]mm{k} */
+ host_and_vcpu_must_have(avx512_bitalg);
+ generate_exception_if(evex.br, EXC_UD);
+ elem_bytes = 1 << evex.w;
+ goto avx512f_no_sae;
+
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x55): /* vpopcnt{d,q}
[xyz]mm/mem,[xyz]mm{k} */
+ host_and_vcpu_must_have(avx512_vpopcntdq);
+ goto avx512f_no_sae;
+
case X86EMUL_OPC_VEX_66(0x0f38, 0x58): /* vpbroadcastd xmm/m32,{x,y}mm */
case X86EMUL_OPC_VEX_66(0x0f38, 0x59): /* vpbroadcastq xmm/m64,{x,y}mm */
case X86EMUL_OPC_VEX_66(0x0f38, 0x78): /* vpbroadcastb xmm/m8,{x,y}mm */
--- a/xen/include/asm-x86/cpufeature.h
+++ b/xen/include/asm-x86/cpufeature.h
@@ -112,6 +112,8 @@
/* CPUID level 0x00000007:0.ecx */
#define cpu_has_avx512_vbmi boot_cpu_has(X86_FEATURE_AVX512_VBMI)
#define cpu_has_avx512_vbmi2 boot_cpu_has(X86_FEATURE_AVX512_VBMI2)
+#define cpu_has_avx512_bitalg boot_cpu_has(X86_FEATURE_AVX512_BITALG)
+#define cpu_has_avx512_vpopcntdq boot_cpu_has(X86_FEATURE_AVX512_VPOPCNTDQ)
/* CPUID level 0x80000007.edx */
#define cpu_has_itsc boot_cpu_has(X86_FEATURE_ITSC)
--- a/xen/include/public/arch-x86/cpufeatureset.h
+++ b/xen/include/public/arch-x86/cpufeatureset.h
@@ -229,6 +229,7 @@ XEN_CPUFEATURE(UMIP, 6*32+ 2) /
XEN_CPUFEATURE(PKU, 6*32+ 3) /*H Protection Keys for Userspace */
XEN_CPUFEATURE(OSPKE, 6*32+ 4) /*! OS Protection Keys Enable */
XEN_CPUFEATURE(AVX512_VBMI2, 6*32+ 6) /*A Additional AVX-512 Vector Byte
Manipulation Instrs */
+XEN_CPUFEATURE(AVX512_BITALG, 6*32+12) /*A Support for VPOPCNT[B,W] and
VPSHUFBITQMB */
XEN_CPUFEATURE(AVX512_VPOPCNTDQ, 6*32+14) /*A POPCNT for vectors of DW/QW */
XEN_CPUFEATURE(RDPID, 6*32+22) /*A RDPID instruction */
--- a/xen/tools/gen-cpuid.py
+++ b/xen/tools/gen-cpuid.py
@@ -269,7 +269,7 @@ def crunch_numbers(state):
# AVX512 extensions acting (solely) on vectors of bytes/words are made
# dependents of AVX512BW (as to requiring wider than 16-bit mask
# registers), despite the SDM not formally making this connection.
- AVX512BW: [AVX512_VBMI, AVX512_VBMI2],
+ AVX512BW: [AVX512_VBMI, AVX512_BITALG, AVX512_VBMI2],
# The features:
# * Single Thread Indirect Branch Predictors
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