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([2607:fb90:5fe8:83ea:bbf4:c9ef:4f3:11c6]) by smtp.gmail.com with ESMTPSA id s36-20020a0568302aa400b0060603221259sm857273otu.41.2022.05.05.11.50.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 May 2022 11:50:11 -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 :mime-version:content-transfer-encoding; bh=WdVA+PWepftZslVtX4CoEviw4FN/SL6jv0Zsx6KJ8Ic=; b=DWjL2/gGTiljT09qBKKqxz1uzbPJlFqNOi/eJ/AeXwXZ65cVSSkdfkFbgywExqUQA8 v9VdKvM+WWLLEZLTsFtZ3yc+/rQ+YX49iu6GqT5wEfp5/YZq1SzIE+o/GajVXdh00JJw sb/iupBfsIIVQ5YM77uVBI9w4refYUEDldNkC/OzpSQVmB5QGFhQMu3+fMYY/mjibr8S sICXVaA22k+wjrCfouFJhcPFblc1Ge/2KYz7sHGn9aRFxype8YcMNjC3gMGaWt8P1NJz 9DLNk7ISzZZcOQUc3uDV6CWj8DJiEj4JCJsmWqLR9ghcBJzoBeS9U//BxPnpFhmDt7Q3 4wzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WdVA+PWepftZslVtX4CoEviw4FN/SL6jv0Zsx6KJ8Ic=; b=zYihiW2O6yvwc4OQDQwcceQn7FKujR+OmbtmAr+++Vgb1OwTGqRAC/PEd47MwZECOf JZDxMKiVrh7puTLPhOriM8LDGbBFWQe2TsZjQN77WyibGnin89nhRXjNchAxc/Eb18mD J7FkeGZkhzqrFsuH+vOdSGv4pds5RjmdEvYaH1PZbxsbtB6+WQzpzPHji2j4qxPZANNy 0Wl10OG4hkbJa56nvjIIMphiDrJJN9BgC67rRig+kthc+FzdWWq0e1Wdd4X6bC4Irmyx V9UvBaMAfZTRH+1sebLBouqs2Q+D+g5pEvSzxWD+OgyfsN4mkKz2HZOTntpXIb51AgKZ QO9Q== X-Gm-Message-State: AOAM533KpcKOqyDDIwH57CHO0g+Y0PJLzfiykVbHa39FnCZIPPf1mJyq bfeMs35dPDj0qAn8YLDcw6QNIB/N1UwDm5/O X-Google-Smtp-Source: ABdhPJyyaWDko07bJPXZOB/5dPuMRhFChLe96AVwkCCIzpPPQD/1T+iNLwem6+AqYmoclnivQkd5fQ== X-Received: by 2002:aca:dac2:0:b0:325:d44d:6280 with SMTP id r185-20020acadac2000000b00325d44d6280mr3092332oig.176.1651776611536; Thu, 05 May 2022 11:50:11 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks Date: Thu, 5 May 2022 13:49:44 -0500 Message-Id: <20220505185006.200555-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220505185006.200555-1-richard.henderson@linaro.org> References: <20220505185006.200555-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::235; envelope-from=richard.henderson@linaro.org; helo=mail-oi1-x235.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1651778000793100001 Content-Type: text/plain; charset="utf-8" Drop el3_no_el2_cp_reginfo, el3_no_el2_v8_cp_reginfo, and the local vpidr_regs definition, and rely on the squasing to ARM_CP_CONST while registering. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/helper.c | 158 ++++---------------------------------------- 1 file changed, 13 insertions(+), 145 deletions(-) diff --git a/target/arm/helper.c b/target/arm/helper.c index 9ab8b65e7b..ea2788b3d5 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -5099,124 +5099,6 @@ static const ARMCPRegInfo v8_cp_reginfo[] =3D { .fieldoffset =3D offsetoflow32(CPUARMState, cp15.mdcr_el3) }, }; =20 -/* Used to describe the behaviour of EL2 regs when EL2 does not exist. */ -static const ARMCPRegInfo el3_no_el2_cp_reginfo[] =3D { - { .name =3D "VBAR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 12, .crm =3D 0, .opc2 =3D 0, - .access =3D PL2_RW, - .readfn =3D arm_cp_read_zero, .writefn =3D arm_cp_write_ignore }, - { .name =3D "HCR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 1, .crm =3D 1, .opc2 =3D 0, - .access =3D PL2_RW, - .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "HACR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 1, .crm =3D 1, .opc2 =3D 7, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "ESR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 5, .crm =3D 2, .opc2 =3D 0, - .access =3D PL2_RW, - .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "CPTR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 1, .crm =3D 1, .opc2 =3D 2, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "MAIR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 10, .crm =3D 2, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "HMAIR1", .state =3D ARM_CP_STATE_AA32, - .cp =3D 15, .opc1 =3D 4, .crn =3D 10, .crm =3D 2, .opc2 =3D 1, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "AMAIR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 10, .crm =3D 3, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "HAMAIR1", .state =3D ARM_CP_STATE_AA32, - .cp =3D 15, .opc1 =3D 4, .crn =3D 10, .crm =3D 3, .opc2 =3D 1, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "AFSR0_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 5, .crm =3D 1, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "AFSR1_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 5, .crm =3D 1, .opc2 =3D 1, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "TCR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 2, .crm =3D 0, .opc2 =3D 2, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "VTCR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 2, .crm =3D 1, .opc2 =3D 2, - .access =3D PL2_RW, .accessfn =3D access_el3_aa32ns, - .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "VTTBR", .state =3D ARM_CP_STATE_AA32, - .cp =3D 15, .opc1 =3D 6, .crm =3D 2, - .access =3D PL2_RW, .accessfn =3D access_el3_aa32ns, - .type =3D ARM_CP_CONST | ARM_CP_64BIT, .resetvalue =3D 0 }, - { .name =3D "VTTBR_EL2", .state =3D ARM_CP_STATE_AA64, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 2, .crm =3D 1, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "SCTLR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 1, .crm =3D 0, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "TPIDR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 13, .crm =3D 0, .opc2 =3D 2, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "TTBR0_EL2", .state =3D ARM_CP_STATE_AA64, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 2, .crm =3D 0, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "HTTBR", .cp =3D 15, .opc1 =3D 4, .crm =3D 2, - .access =3D PL2_RW, .type =3D ARM_CP_64BIT | ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "CNTHCTL_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 1, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "CNTVOFF_EL2", .state =3D ARM_CP_STATE_AA64, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 0, .opc2 =3D 3, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "CNTVOFF", .cp =3D 15, .opc1 =3D 4, .crm =3D 14, - .access =3D PL2_RW, .type =3D ARM_CP_64BIT | ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "CNTHP_CVAL_EL2", .state =3D ARM_CP_STATE_AA64, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 2, .opc2 =3D 2, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "CNTHP_CVAL", .cp =3D 15, .opc1 =3D 6, .crm =3D 14, - .access =3D PL2_RW, .type =3D ARM_CP_64BIT | ARM_CP_CONST, - .resetvalue =3D 0 }, - { .name =3D "CNTHP_TVAL_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 2, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "CNTHP_CTL_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 2, .opc2 =3D 1, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "MDCR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 1, .crm =3D 1, .opc2 =3D 1, - .access =3D PL2_RW, .accessfn =3D access_tda, - .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "HPFAR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 6, .crm =3D 0, .opc2 =3D 4, - .access =3D PL2_RW, .accessfn =3D access_el3_aa32ns, - .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "HSTR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 1, .crm =3D 1, .opc2 =3D 3, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "FAR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 6, .crm =3D 0, .opc2 =3D 0, - .access =3D PL2_RW, .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, - { .name =3D "HIFAR", .state =3D ARM_CP_STATE_AA32, - .type =3D ARM_CP_CONST, - .cp =3D 15, .opc1 =3D 4, .crn =3D 6, .crm =3D 0, .opc2 =3D 2, - .access =3D PL2_RW, .resetvalue =3D 0 }, -}; - -/* Ditto, but for registers which exist in ARMv8 but not v7 */ -static const ARMCPRegInfo el3_no_el2_v8_cp_reginfo[] =3D { - { .name =3D "HCR2", .state =3D ARM_CP_STATE_AA32, - .cp =3D 15, .opc1 =3D 4, .crn =3D 1, .crm =3D 1, .opc2 =3D 4, - .access =3D PL2_RW, - .type =3D ARM_CP_CONST, .resetvalue =3D 0 }, -}; - static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_= mask) { ARMCPU *cpu =3D env_archcpu(env); @@ -7902,7 +7784,17 @@ void register_cp_regs_for_features(ARMCPU *cpu) define_arm_cp_regs(cpu, v8_idregs); define_arm_cp_regs(cpu, v8_cp_reginfo); } - if (arm_feature(env, ARM_FEATURE_EL2)) { + + /* + * Register the base EL2 cpregs. + * Pre v8, these registers are implemented only as part of the + * Virtualization Extensions (EL2 present). Beginning with v8, + * if EL2 is missing but EL3 is enabled, mostly these become + * RES0 from EL3, with some specific exceptions. + */ + if (arm_feature(env, ARM_FEATURE_EL2) + || (arm_feature(env, ARM_FEATURE_EL3) + && arm_feature(env, ARM_FEATURE_V8))) { uint64_t vmpidr_def =3D mpidr_read_val(env); ARMCPRegInfo vpidr_regs[] =3D { { .name =3D "VPIDR", .state =3D ARM_CP_STATE_AA32, @@ -7946,33 +7838,9 @@ void register_cp_regs_for_features(ARMCPU *cpu) }; define_one_arm_cp_reg(cpu, &rvbar); } - } else { - /* If EL2 is missing but higher ELs are enabled, we need to - * register the no_el2 reginfos. - */ - if (arm_feature(env, ARM_FEATURE_EL3)) { - /* When EL3 exists but not EL2, VPIDR and VMPIDR take the value - * of MIDR_EL1 and MPIDR_EL1. - */ - ARMCPRegInfo vpidr_regs[] =3D { - { .name =3D "VPIDR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 0, .crm =3D 0, .opc2 = =3D 0, - .access =3D PL2_RW, .accessfn =3D access_el3_aa32ns, - .type =3D ARM_CP_CONST, .resetvalue =3D cpu->midr, - .fieldoffset =3D offsetof(CPUARMState, cp15.vpidr_el2) }, - { .name =3D "VMPIDR_EL2", .state =3D ARM_CP_STATE_BOTH, - .opc0 =3D 3, .opc1 =3D 4, .crn =3D 0, .crm =3D 0, .opc2 = =3D 5, - .access =3D PL2_RW, .accessfn =3D access_el3_aa32ns, - .type =3D ARM_CP_NO_RAW, - .writefn =3D arm_cp_write_ignore, .readfn =3D mpidr_read= }, - }; - define_arm_cp_regs(cpu, vpidr_regs); - define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo); - if (arm_feature(env, ARM_FEATURE_V8)) { - define_arm_cp_regs(cpu, el3_no_el2_v8_cp_reginfo); - } - } } + + /* Register the base EL3 cpregs. */ if (arm_feature(env, ARM_FEATURE_EL3)) { define_arm_cp_regs(cpu, el3_cp_reginfo); ARMCPRegInfo el3_regs[] =3D { --=20 2.34.1