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[97.113.188.82]) by smtp.gmail.com with ESMTPSA id d9sm16185027pgq.6.2019.03.13.21.55.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 Mar 2019 21:55:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=D2d2Ekku2Ab6AUXv8SytBYGltSiFV/Xsi168amKsjOE=; b=yyCFqKgDQcZ1MLF523Ew4u4hiLNiypQ8G1l3Uio54ryK3c+7oUtSzRQYWPDVopI389 XxUK7Ef16TrbGKqtwbYfBKiOxL6CNyc+wJ07AIh3wfiFrayUlZBu5oM6I8DHd6W4kl31 fI7AxCrqZY4FF2M+ZyclWjmkgOoupMYaTmJf0g5tzVzaz/JgMuaPlWFMzIJSsSc9ur27 IP6K1ZZjOpxqAgdrJDMx20IH2qZrKT9EdC84Ewufcw6rS57yD5pPevVb0jpdZ0J/ZRZz CxBBG/FA5pQENfawm/e1FLSdw5AgdWnukc2xNZYQXfHy6yCsTu2I2v5qWBXu6FuLafbt easQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=D2d2Ekku2Ab6AUXv8SytBYGltSiFV/Xsi168amKsjOE=; b=Fq/tMw3tm19/InSDDqFc+R5Nt+iJI58iM9CPLHjtUlDkCtDAhsvSiCYslPN7jpur0x coAw2OJy0rUNVL5ny0Q45E/j/h3J+CI7KA0GXAK7xQaRgiCUTajt36eWgfcyAjBpjhsv az9i4S7J4zjJT4IizrKoF43cNfRfKXHqIcgICVE9oapNk71FuetkIF853MvXvEMFMmwd sOESLTZOWZ/H35bF5T/dna3x1lxtb7dDVdlQ6m0vEl2sy8wSJ4MB/enkazn+sjKhYNq0 EE9ZsLZjYHK8/DrHeydUMsZ2rBC5bdRWI/wPcPE65vBuyWiC0bhQGWMjZ2F0VdypZwOz vSeA== X-Gm-Message-State: APjAAAW70v2aoUD2akn5SwtnS6tuq0yRFPUH0kL2NT8ILyGLVKBd4Zni 8wpkY5EFS43Z1568GXaQN7gZRv9qUfg= X-Google-Smtp-Source: APXvYqxul5XpPTrIeASTOGxUqfUwe18hbZTsY2b0dDDRFzLzJyP1pzWWixJBIsrgYSsDFxYO07hJlQ== X-Received: by 2002:aa7:81c5:: with SMTP id c5mr48659905pfn.217.1552539345105; Wed, 13 Mar 2019 21:55:45 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Wed, 13 Mar 2019 21:55:26 -0700 Message-Id: <20190314045526.13342-15-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190314045526.13342-1-richard.henderson@linaro.org> References: <20190314045526.13342-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::543 Subject: [Qemu-devel] [PATCH v2 14/14] target/arm: Implement ARMv8.5-RNG X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Cc: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/cpu.h | 5 +++++ target/arm/cpu64.c | 1 + target/arm/helper.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 5f23c62132..aaa9e02e78 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -3441,6 +3441,11 @@ static inline bool isar_feature_aa64_condm_5(const A= RMISARegisters *id) return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, TS) >=3D 2; } =20 +static inline bool isar_feature_aa64_rndr(const ARMISARegisters *id) +{ + return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, RNDR) !=3D 0; +} + static inline bool isar_feature_aa64_jscvt(const ARMISARegisters *id) { return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, JSCVT) !=3D 0; diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 228906f267..835f73cceb 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -310,6 +310,7 @@ static void aarch64_max_initfn(Object *obj) t =3D FIELD_DP64(t, ID_AA64ISAR0, DP, 1); t =3D FIELD_DP64(t, ID_AA64ISAR0, FHM, 1); t =3D FIELD_DP64(t, ID_AA64ISAR0, TS, 2); /* v8.5-CondM */ + t =3D FIELD_DP64(t, ID_AA64ISAR0, RNDR, 1); cpu->isar.id_aa64isar0 =3D t; =20 t =3D cpu->isar.id_aa64isar1; diff --git a/target/arm/helper.c b/target/arm/helper.c index 2607d39ad1..3fe7dc8719 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -20,6 +20,7 @@ #include "fpu/softfloat.h" #include "qemu/range.h" #include "qapi/qapi-commands-target.h" +#include "qemu/random.h" =20 #define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */ =20 @@ -5717,6 +5718,34 @@ static const ARMCPRegInfo pauth_reginfo[] =3D { .fieldoffset =3D offsetof(CPUARMState, apib_key.hi) }, REGINFO_SENTINEL }; + +static uint64_t rndr_readfn(CPUARMState *env, const ARMCPRegInfo *ri) +{ + uint64_t ret; + + /* Success sets NZCV =3D 0000. */ + env->NF =3D env->CF =3D env->VF =3D 0, env->ZF =3D 1; + if (likely(qemu_getrandom(&ret, sizeof(ret), true))) { + return ret; + } + + /* Failure sets Z =3D 1 and returns 0. */ + env->ZF =3D 0; + return 0; +} + +/* We do not support re-seeding, so the two registers operate the same. */ +static const ARMCPRegInfo rndr_reginfo[] =3D { + { .name =3D "RNDR", .state =3D ARM_CP_STATE_AA64, + .type =3D ARM_CP_NO_RAW | ARM_CP_SUPPRESS_TB_END, + .opc0 =3D 3, .opc1 =3D 3, .crn =3D 2, .crm =3D 4, .opc2 =3D 0, + .access =3D PL0_R, .readfn =3D rndr_readfn }, + { .name =3D "RNDRRS", .state =3D ARM_CP_STATE_AA64, + .type =3D ARM_CP_NO_RAW | ARM_CP_SUPPRESS_TB_END, + .opc0 =3D 3, .opc1 =3D 3, .crn =3D 2, .crm =3D 4, .opc2 =3D 1, + .access =3D PL0_R, .readfn =3D rndr_readfn }, + REGINFO_SENTINEL +}; #endif =20 static CPAccessResult access_predinv(CPUARMState *env, const ARMCPRegInfo = *ri, @@ -6661,6 +6690,9 @@ void register_cp_regs_for_features(ARMCPU *cpu) if (cpu_isar_feature(aa64_pauth, cpu)) { define_arm_cp_regs(cpu, pauth_reginfo); } + if (cpu_isar_feature(aa64_rndr, cpu)) { + define_arm_cp_regs(cpu, rndr_reginfo); + } #endif =20 /* --=20 2.17.1