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Wed, 11 Nov 2026 05:48:50 -0800 (PST) Message-ID: Date: Wed, 11 Nov 2026 14:48:49 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v5 17/19] x86emul: support AVX10.2-aux misc insns From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Teddy Astie , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= References: <1be43887-4494-4ff5-a801-0c6bab90c80d@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: <1be43887-4494-4ff5-a801-0c6bab90c80d@suse.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-purgate-ID: tlsNG-ebf023/1794404931-C36C2B50-2B293874/10/78276251493 X-purgate-type: spam X-purgate-size: 6552 X-Spam-Status: No, score=-17.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 VPMOVSSDB is a counterpart to VPMOVSDB, so handle it the same. VUNPACKB otoh is regular (without fault suppression or broadcast) as to its memory operand, and hence straightforward to handle. Signed-off-by: Jan Beulich --- SDE: ??? --- v5: New. --- a/tools/tests/x86_emulator/evex-disp8.c +++ b/tools/tests/x86_emulator/evex-disp8.c @@ -821,6 +821,11 @@ static const struct test avx10_2_128[] = INSN(movw, f3, map5, 7e, el, fp16, el), }; +static const struct test avx10_2_aux_all[] = { + INSN(pmovssdb, f3, 0f38, 41, vl_4, b, vl), + INSN(unpackb, , 0f3a, 3d, vl, b, vl), +}; + static const struct test movrs_all[] = { INSN(movrsb, f2, map5, 6f, vl, b, vl), INSN(movrsd, f3, map5, 6f, vl, d_nb, vl), @@ -1258,4 +1263,6 @@ void evex_disp8_test(void *instr, struct run(cpu_has_avx10_2, avx10_2, all); run(cpu_has_avx10_2, avx10_2, 128); + + run(cpu_has_avx10_2_aux, avx10_2_aux, all); } --- a/tools/tests/x86_emulator/predicates.c +++ b/tools/tests/x86_emulator/predicates.c @@ -1917,6 +1917,7 @@ static const struct evex { { { 0x3e }, 2, T, R, pfx_66, WIG, Ln }, /* vpmaxuw */ { { 0x3f }, 2, T, R, pfx_66, Wn, Ln }, /* vpmaxu{d,q} */ { { 0x40 }, 2, T, R, pfx_66, Wn, Ln }, /* vpmull{d,q} */ + { { 0x41 }, 2, T, W, pfx_f3, W0, Ln }, /* vpmovssdb */ { { 0x42 }, 2, T, R, pfx_66, Wn, Ln }, /* vgetexpp{s,d} */ { { 0x43 }, 2, T, R, pfx_66, Wn, LIG }, /* vgetexps{s,d} */ { { 0x44 }, 2, T, R, pfx_66, Wn, Ln }, /* vlzcnt{d,q} */ @@ -2091,6 +2092,7 @@ static const struct evex { { { 0x39 }, 3, T, W, pfx_66, Wn, L1|L2 }, /* vextracti{32x4,64x2} */ { { 0x3a }, 3, T, R, pfx_66, Wn, L2 }, /* vinserti{32x8,64x4} */ { { 0x3b }, 3, T, W, pfx_66, Wn, L2 }, /* vextracti{32x8,64x4} */ + { { 0x3d }, 3, T, R, pfx_no, W0, Ln }, /* vunpackb */ { { 0x3e }, 3, T, R, pfx_66, Wn, Ln }, /* vpcmpu{b,w} */ { { 0x3f }, 3, T, R, pfx_66, Wn, Ln }, /* vpcmp{b,w} */ { { 0x42 }, 3, T, R, pfx_66, W0, Ln }, /* vdbpsadbw */ --- a/tools/tests/x86_emulator/x86-emulate.h +++ b/tools/tests/x86_emulator/x86-emulate.h @@ -219,6 +219,8 @@ void wrpkru(unsigned int val); #define cpu_has_avx10 (cpu_policy.feat.avx10 && xcr0_mask(0xe6)) #define cpu_has_avx10_2 (cpu_policy.avx10.version >= 2 && \ xcr0_mask(0xe6)) +#define cpu_has_avx10_2_aux (cpu_policy.avx10.avx10_v2_aux && \ + xcr0_mask(0xe6)) #define cpu_has_xgetbv1 (cpu_has_xsave && cpu_policy.xstate.xgetbv1) --- a/xen/arch/x86/x86_emulate/decode.c +++ b/xen/arch/x86/x86_emulate/decode.c @@ -492,6 +492,7 @@ static const struct ext0f3a_table { [0x3a] = { .simd_size = simd_256, .d8s = d8s_vl_by_2 }, [0x39] = { .simd_size = simd_128, .to_mem = 1, .two_op = 1, .d8s = 4 }, [0x3b] = { .simd_size = simd_256, .to_mem = 1, .two_op = 1, .d8s = d8s_vl_by_2 }, + [0x3d] = { .simd_size = simd_packed_int, .two_op = 1, .d8s = d8s_vl }, [0x3e ... 0x3f] = { .simd_size = simd_packed_int, .d8s = d8s_vl }, [0x40 ... 0x41] = { .simd_size = simd_packed_fp }, [0x42 ... 0x43] = { .simd_size = simd_packed_int, .d8s = d8s_vl }, @@ -1456,14 +1457,20 @@ int x86emul_decode(struct x86_emulate_st * insns with the same base opcodes. Rather than adding new * columns to the table, handle this here for now. */ - if ( s->evex.pfx != vex_f3 || (b & 0xf8) != 0x10 ) - disp8scale = decode_disp8scale(ext0f38_table[b].d8s, s); - else + if ( s->evex.pfx == vex_f3 && (b & 0xf8) == 0x10 ) { disp8scale = decode_disp8scale(ext0f38_table[b ^ 0x30].d8s, s); s->simd_size = simd_other; } + /* Same for VPMOVSSDB vs VPMOVSDB. */ + else if ( s->evex.pfx == vex_f3 && b == 0x41 ) + { + disp8scale = decode_disp8scale(ext0f38_table[0x21].d8s, s); + s->simd_size = simd_other; + } + else + disp8scale = decode_disp8scale(ext0f38_table[b].d8s, s); } break; --- a/xen/arch/x86/x86_emulate/private.h +++ b/xen/arch/x86/x86_emulate/private.h @@ -610,6 +610,7 @@ amd_like(const struct x86_emulate_ctxt * #define vcpu_has_user_msr() (ctxt->cpuid->feat.user_msr) #define vcpu_has_avx10(minor) (ctxt->cpuid->avx10.version >= (minor)) +#define vcpu_has_avx10_2_aux() (ctxt->cpuid->avx10.avx10_v2_aux) #define vcpu_must_have(feat, ...) \ generate_exception_if(!vcpu_has_##feat(__VA_ARGS__), X86_EXC_UD) --- a/xen/arch/x86/x86_emulate/util.c +++ b/xen/arch/x86/x86_emulate/util.c @@ -150,6 +150,7 @@ bool cf_check x86_insn_is_mem_write(cons X86EMUL_OPC_EVEX_F3(0x0f38, 0x25): /* VPMOVS* */ case X86EMUL_OPC_EVEX_F3(0x0f38, 0x30) ... X86EMUL_OPC_EVEX_F3(0x0f38, 0x35): /* VPMOV{D,Q,W}* */ + case X86EMUL_OPC_EVEX_F3(0x0f38, 0x41): /* VPMOVSSDB */ return s->modrm_mod != 3; } --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -5840,6 +5840,9 @@ x86_emulate( elem_bytes = 2; goto avx512f_no_sae; + case X86EMUL_OPC_EVEX_F3(0x0f38, 0x41): /* vpmovssdb [xyz]mm,xmm/mem{k} */ + vcpu_must_have(avx10_2_aux); + fallthrough; case X86EMUL_OPC_EVEX_F3(0x0f38, 0x10): /* vpmovuswb [xyz]mm,{x,y}mm/mem{k} */ case X86EMUL_OPC_EVEX_66(0x0f38, 0x20): /* vpmovsxbw {x,y}mm/mem,[xyz]mm{k} */ case X86EMUL_OPC_EVEX_F3(0x0f38, 0x20): /* vpmovswb [xyz]mm,{x,y}mm/mem{k} */ @@ -7747,6 +7750,13 @@ x86_emulate( visa_check(bw); goto opmask_shift_imm; + case X86EMUL_OPC_EVEX(0x0f3a, 0x3d): /* vunpackb $imm8,[xyz]mm/mem,[xyz]mm{k} */ + generate_exception_if(evex.w || evex.brs, X86_EXC_UD); + vcpu_must_have(avx10_2_aux); + avx512_vlen_check(false); + fault_suppression = false; + goto simd_imm8_zmm; + case X86EMUL_OPC_EVEX_F3(0x0f3a, 0x42): /* vmpsadbw $imm8,[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */ generate_exception_if(evex.w || evex.brs, X86_EXC_UD); vcpu_must_have(avx10, 2);