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Thu, 09 Apr 2026 08:15:43 -0700 (PDT) Message-ID: <66f59541-29f1-4bfa-a56e-67e827391ca1@suse.com> Date: Thu, 9 Apr 2026 17:15:41 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v4 15/16] x86emul: support other AVX10.2 convert insns From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= , Teddy Astie , Oleksii Kurochko , "community.manager@xenproject.org" References: <1e2ff012-b07a-43be-9ba6-290b38d3c97c@suse.com> Content-Language: en-US Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <1e2ff012-b07a-43be-9ba6-290b38d3c97c@suse.com> Content-Transfer-Encoding: quoted-printable X-purgate-ID: tlsNG-ebf023/1775747744-33B3051B-4B7489B5/0/0 X-purgate-type: clean X-purgate-size: 10749 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1775747765000154100 Content-Type: text/plain; charset="utf-8" Despite most of them being about conversion to BF8/HF8, they are still somewhat similar to various existing convert insns. Signed-off-by: Jan Beulich --- SDE: -dmr / -future --- v4: Update to spec version 3. Switch to using fallthrough pseudo-keyword. Series re-ordering adjustments. Update to spec version 6. Add ChangeLog= entry. v3: New. --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -16,7 +16,7 @@ The format is based on [Keep a Changelog mitigate (by rate-limiting) the system wide impact of an HVM guest misusing atomic instructions. - Support for CPIO microcode in discrete multiboot modules. - - Support for AVX10.1. (Experimental) + - Support for AVX10.2. (Experimental) =20 - On Arm: - Support for guest suspend and resume to/from RAM via vPSCI. --- a/tools/tests/x86_emulator/evex-disp8.c +++ b/tools/tests/x86_emulator/evex-disp8.c @@ -727,8 +727,22 @@ static const struct test avx10_2_all[] =3D INSN(comisbf16, 66, map5, 2f, el, bf16, el), INSN_SFP(comx, 0f, 2f), INSN(comxsh, f3, map5, 2f, el, fp16, el), + INSN(cvt2ph2bf8, f2, 0f38, 74, vl, fp16, vl), + INSN(cvt2ph2bf8s, f2, map5, 74, vl, fp16, vl), + INSN(cvt2ph2hf8, f2, map5, 18, vl, fp16, vl), + INSN(cvt2ph2hf8s, f2, map5, 1b, vl, fp16, vl), + INSN(cvt2ps2phx, 66, 0f38, 67, vl, d, vl), + INSN(cvtbiasph2bf8, , 0f38, 74, vl, fp16, vl), + INSN(cvtbiasph2bf8s, , map5, 74, vl, fp16, vl), + INSN(cvtbiasph2hf8, , map5, 18, vl, fp16, vl), + INSN(cvtbiasph2hf8s, , map5, 1b, vl, fp16, vl), + INSN(cvthf82ph, f2, map5, 1e, vl_2, b, vl), INSN(cvtbf162ibs, f2, map5, 69, vl, bf16, vl), INSN(cvtbf162iubs, f2, map5, 6b, vl, bf16, vl), + INSN(cvtph2bf8, f3, 0f38, 74, vl, fp16, vl), + INSN(cvtph2bf8s, f3, map5, 74, vl, fp16, vl), + INSN(cvtph2hf8, f3, map5, 18, vl, fp16, vl), + INSN(cvtph2hf8s, f3, map5, 1b, vl, fp16, vl), INSN(cvtph2ibs, , map5, 69, vl, fp16, vl), INSN(cvtph2iubs, , map5, 6b, vl, fp16, vl), INSN(cvtps2ibs, 66, map5, 69, vl, d, vl), --- a/tools/tests/x86_emulator/predicates.c +++ b/tools/tests/x86_emulator/predicates.c @@ -1952,6 +1952,7 @@ static const struct evex { { { 0x64 }, 2, T, R, pfx_66, Wn, Ln }, /* vpblendm{d,q} */ { { 0x65 }, 2, T, R, pfx_66, Wn, Ln }, /* vblendmp{s,d} */ { { 0x66 }, 2, T, R, pfx_66, Wn, Ln }, /* vpblendm{b,w} */ + { { 0x67 }, 2, T, R, pfx_66, W0, Ln }, /* vcvt2ps2phx */ { { 0x68 }, 2, T, R, pfx_f2, Wn, Ln }, /* vp2intersect{d,q} */ { { 0x70 }, 2, T, R, pfx_66, W1, Ln }, /* vpshldvw */ { { 0x71 }, 2, T, R, pfx_66, Wn, Ln }, /* vpshldv{d,q} */ @@ -1959,6 +1960,9 @@ static const struct evex { { { 0x72 }, 2, T, R, pfx_f3, W1, Ln }, /* vcvtneps2bf16 */ { { 0x72 }, 2, T, R, pfx_f2, W1, Ln }, /* vcvtne2ps2bf16 */ { { 0x73 }, 2, T, R, pfx_66, Wn, Ln }, /* vpshrdv{d,q} */ + { { 0x74 }, 2, T, R, pfx_no, W0, Ln }, /* vcvtbiasph2bf8 */ + { { 0x74 }, 2, T, R, pfx_f3, W0, Ln }, /* vcvtph2bf8 */ + { { 0x74 }, 2, T, R, pfx_f2, W0, Ln }, /* vcvt2ph2bf8 */ { { 0x75 }, 2, T, R, pfx_66, Wn, Ln }, /* vpermi2{b,w} */ { { 0x76 }, 2, T, R, pfx_66, Wn, Ln }, /* vpermi2{d,q} */ { { 0x77 }, 2, T, R, pfx_66, Wn, Ln }, /* vpermi2p{s,d} */ @@ -2124,8 +2128,15 @@ static const struct evex { }, evex_map5[] =3D { { { 0x10 }, 2, T, R, pfx_f3, W0, LIG }, /* vmovsh */ { { 0x11 }, 2, T, W, pfx_f3, W0, LIG }, /* vmovsh */ + { { 0x18 }, 2, T, R, pfx_no, W0, Ln }, /* vcvtbiasph2hf8 */ + { { 0x18 }, 2, T, R, pfx_f3, W0, Ln }, /* vcvtph2hf8 */ + { { 0x18 }, 2, T, R, pfx_f2, W0, Ln }, /* vcvt2ph2hf8 */ + { { 0x1b }, 2, T, R, pfx_no, W0, Ln }, /* vcvtbiasph2hf8s */ + { { 0x1b }, 2, T, R, pfx_f3, W0, Ln }, /* vcvtph2hf8s */ + { { 0x1b }, 2, T, R, pfx_f2, W0, Ln }, /* vcvt2ph2hf8s */ { { 0x1d }, 2, T, R, pfx_66, W0, Ln }, /* vcvtps2phx */ { { 0x1d }, 2, T, R, pfx_no, W0, LIG }, /* vcvtss2sh */ + { { 0x1e }, 2, T, R, pfx_f2, W0, Ln }, /* cvthf82ph */ { { 0x2a }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvtsi2sh */ { { 0x2c }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvttsh2si */ { { 0x2d }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvtsh2si */ @@ -2187,6 +2198,9 @@ static const struct evex { { { 0x6e }, 2, T, R, pfx_f3, W0, L0 }, /* vmovw */ { { 0x6f }, 2, T, R, pfx_f3, Wn, Ln }, /* vmovrs{d,q} */ { { 0x6f }, 2, T, R, pfx_f2, Wn, Ln }, /* vmovrs{b,w} */ + { { 0x74 }, 2, T, R, pfx_no, W0, Ln }, /* vcvtbiasph2bf8s */ + { { 0x74 }, 2, T, R, pfx_f3, W0, Ln }, /* vcvtph2bf8s */ + { { 0x74 }, 2, T, R, pfx_f2, W0, Ln }, /* vcvt2ph2bf8s */ { { 0x78 }, 2, T, R, pfx_no, W0, Ln }, /* vcvttph2udq */ { { 0x78 }, 2, T, R, pfx_66, W0, Ln }, /* vcvttph2uqq */ { { 0x78 }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvttsh2usi */ --- a/xen/arch/x86/x86_emulate/decode.c +++ b/xen/arch/x86/x86_emulate/decode.c @@ -378,8 +378,10 @@ static const struct ext0f38_table { [0x62] =3D { .simd_size =3D simd_packed_int, .two_op =3D 1, .d8s =3D d= 8s_bw }, [0x63] =3D { .simd_size =3D simd_packed_int, .to_mem =3D 1, .two_op = =3D 1, .d8s =3D d8s_bw }, [0x64 ... 0x66] =3D { .simd_size =3D simd_packed_int, .d8s =3D d8s_vl = }, + [0x67] =3D { .simd_size =3D simd_other, .d8s =3D d8s_vl }, [0x68] =3D { .simd_size =3D simd_packed_int, .d8s =3D d8s_vl }, [0x70 ... 0x73] =3D { .simd_size =3D simd_packed_int, .d8s =3D d8s_vl = }, + [0x74] =3D { .simd_size =3D simd_other, .d8s =3D d8s_vl }, [0x75 ... 0x76] =3D { .simd_size =3D simd_packed_int, .d8s =3D d8s_vl = }, [0x77] =3D { .simd_size =3D simd_packed_fp, .d8s =3D d8s_vl }, [0x78] =3D { .simd_size =3D simd_other, .two_op =3D 1 }, @@ -1439,6 +1441,15 @@ int x86emul_decode(struct x86_emulate_st s->simd_size =3D ext0f38_table[b].simd_size; if ( evex_encoded() ) { + switch ( b ) + { + case 0x74: /* cvt{bias,ne,ne2}ph2bf8 */ + s->fp16 =3D true; + if ( s->evex.pfx !=3D vex_f2 ) + d |=3D TwoOp; + break; + } + /* * VPMOVUS* are identical to VPMOVS* Disp8-scaling-wise, b= ut * their attributes don't match those of the vex_66 encoded @@ -1586,6 +1597,23 @@ int x86emul_decode(struct x86_emulate_st =20 switch ( b ) { + case 0x18: /* vcvt{bias,ne,ne2}ph2hf8 */ + case 0x1b: /* vcvt{bias,ne,ne2}ph2hf8s */ + case 0x74: /* vcvt{bias,ne,ne2}ph2bf8s */ + s->fp16 =3D true; + d =3D DstReg | SrcMem; + if ( s->evex.pfx !=3D vex_f2 ) + d |=3D TwoOp; + s->simd_size =3D simd_other; + disp8scale =3D s->evex.brs ? 1 : 4 + s->evex.lr; + break; + + case 0x1e: /* vcvthf82ph */ + d =3D DstReg | SrcMem | TwoOp; + s->simd_size =3D simd_other; + disp8scale =3D 3 + s->evex.lr; + break; + case 0x78: case 0x79: /* vcvt{,t}ph2u{d,q}q need special casing */ --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -6243,6 +6243,30 @@ x86_emulate( } goto simd_zmm; =20 + case X86EMUL_OPC_EVEX (0x0f38, 0x74): /* vcvtbiasph2bf8 [xyz]mm,[xyz= ]mm/mem{k} */ + case X86EMUL_OPC_EVEX_F3(0x0f38, 0x74): /* vcvtph2bf8 [xyz]mm,[xyz]mm/= mem{k} */ + case X86EMUL_OPC_EVEX_F2(0x0f38, 0x74): /* vcvt2ph2bf8 [xyz]mm,[xyz]mm= ,[xyz]mm/mem{k} */ + case X86EMUL_OPC_EVEX ( 5, 0x18): /* vcvtbiasph2hf8 [xyz]mm,[xyz= ]mm/mem{k} */ + case X86EMUL_OPC_EVEX_F3( 5, 0x18): /* vcvtph2hf8 [xyz]mm,[xyz]mm/= mem{k} */ + case X86EMUL_OPC_EVEX_F2( 5, 0x18): /* vcvt2ph2hf8 [xyz]mm,[xyz]mm= ,[xyz]mm/mem{k} */ + case X86EMUL_OPC_EVEX ( 5, 0x1b): /* vcvtbiasph2hf8s [xyz]mm,[xy= z]mm/mem{k} */ + case X86EMUL_OPC_EVEX_F3( 5, 0x1b): /* vcvtph2hf8s [xyz]mm,[xyz]mm= /mem{k} */ + case X86EMUL_OPC_EVEX_F2( 5, 0x1b): /* vcvt2ph2hf8s [xyz]mm,[xyz]m= m,[xyz]mm/mem{k} */ + case X86EMUL_OPC_EVEX ( 5, 0x74): /* vcvtbiasph2bf8s [xyz]mm,[xy= z]mm/mem{k} */ + case X86EMUL_OPC_EVEX_F3( 5, 0x74): /* vcvtph2bf8s [xyz]mm,[xyz]mm= /mem{k} */ + case X86EMUL_OPC_EVEX_F2( 5, 0x74): /* vcvt2ph2bf8s [xyz]mm,[xyz]m= m,[xyz]mm/mem{k} */ + generate_exception_if(ea.type !=3D OP_MEM && evex.brs, X86_EXC_UD); + fault_suppression =3D false; + fallthrough; + case X86EMUL_OPC_EVEX_66(0x0f38, 0x67): /* vcvt2ps2phx [xyz]mm,[xyz]mm= ,[xyz]mm/mem{k} */ + generate_exception_if(evex.w, X86_EXC_UD); + if ( !cp->avx10.avx10_v1_aux ) + vcpu_must_have(avx10, 2); + if ( ea.type !=3D OP_REG || !evex.brs ) + avx512_vlen_check(false); + op_bytes =3D 16 << evex.lr; + goto simd_zmm; + case X86EMUL_OPC_EVEX_F2(0x0f38, 0x68): /* vp2intersect{d,q} [xyz]mm/m= em,[xyz]mm,k+1 */ host_and_vcpu_must_have(avx512_vp2intersect); generate_exception_if(evex.opmsk || !evex.r || !evex.R, X86_EXC_UD= ); @@ -7946,6 +7970,15 @@ x86_emulate( generate_exception_if(evex.w, X86_EXC_UD); goto avx512f_all_fp; =20 + case X86EMUL_OPC_EVEX_F2(5, 0x1e): /* vcvthf82ph [xyz]mm,[xyz]mm/mem{k= } */ + generate_exception_if(evex.w || evex.brs, X86_EXC_UD); + if ( !cp->avx10.avx10_v1_aux ) + vcpu_must_have(avx10, 2); + if ( ea.type !=3D OP_REG || !evex.brs ) + avx512_vlen_check(false); + op_bytes =3D 8 << evex.lr; + goto simd_zmm; + case X86EMUL_OPC_EVEX_66(5, 0x51): /* vsqrtbf16 [xyz]mm/mem,[xyz]mm{k}= */ case X86EMUL_OPC_EVEX_66(5, 0x58): /* vaddbf16 [xyz]mm/mem,[xyz]mm,[xy= z]mm{k} */ case X86EMUL_OPC_EVEX_66(5, 0x59): /* vmulbf16 [xyz]mm/mem,[xyz]mm,[xy= z]mm{k} */ --- a/xen/include/public/arch-x86/cpufeatureset.h +++ b/xen/include/public/arch-x86/cpufeatureset.h @@ -410,7 +410,7 @@ XEN_CPUFEATURE(TSA_SQ_NO, 18*32 XEN_CPUFEATURE(TSA_L1_NO, 18*32+ 2) /*A No L1D Transitive Schedu= ler Attacks */ =20 /* Intel-defined CPU features, CPUID level 0x00000024:1.ecx, word 19 */ -XEN_CPUFEATURE(AVX10_V1_AUX, 19*32+ 2) /* AVX10 V1 Auxiliary Instr= uctions */ +XEN_CPUFEATURE(AVX10_V1_AUX, 19*32+ 2) /*a AVX10 V1 Auxiliary Instr= uctions */ =20 #endif /* XEN_CPUFEATURE */