From nobody Mon Feb 9 20:30:27 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1679528380; cv=none; d=zohomail.com; s=zohoarc; b=n+u4hbMiqGnHUy4PXwn2b/qoSaXpwImqTdzsbRmbqGJPfNSF75s3qPs8y/x+8nbQAUeJLq3zQOn0SyF0j9b72PyQB74uCi5riguWulE/RDxEkIxQ7vjGzjxDOblmtMNxsawOA212tRDAtyI+XeiuMU23sL4J455zcXFl7U3vthM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1679528380; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=9QVfQLLS1pRC6IGhHQ3GM79qE9kCVzjnkNPykrFgYP8=; b=anyE4VEu77d+zO+eG96E3EAskyR2xaxNlZuF0w33cbGv+rhr570K+LLTSOaND6g3KT83jrLKVBg9D5KpJNcgFPTLGjcUQuAyK7iO1O5Gey4HGkxSEPL+8U3mqUN1NVzfjOYl5RyoSxLaKESmCwVeXb0phkHd5HsoPmxmblvQrpA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16795283809501002.9378862134096; Wed, 22 Mar 2023 16:39:40 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pf6wn-0006j0-Dm; Wed, 22 Mar 2023 18:28:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pf6wh-0006ih-A4 for qemu-devel@nongnu.org; Wed, 22 Mar 2023 18:28:39 -0400 Received: from mail-yw1-x1131.google.com ([2607:f8b0:4864:20::1131]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pf6wE-0006uR-LM for qemu-devel@nongnu.org; Wed, 22 Mar 2023 18:28:36 -0400 Received: by mail-yw1-x1131.google.com with SMTP id 00721157ae682-5456249756bso68273077b3.5 for ; Wed, 22 Mar 2023 15:28:09 -0700 (PDT) Received: from grind.. ([177.95.89.231]) by smtp.gmail.com with ESMTPSA id ax35-20020a05687c022300b0017243edbe5bsm5586817oac.58.2023.03.22.15.20.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Mar 2023 15:20:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1679524061; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9QVfQLLS1pRC6IGhHQ3GM79qE9kCVzjnkNPykrFgYP8=; b=Tp4lIFUUYrQbPbt0UHa54rWScg764eQBb/lF+WKRsAUqqIlWknvC4Tr+xzO3D6deZg g0ZYDo8UY8M3oDJtQpVoDtRZO5/AaHYXL9oAAcgXJDPuQo2bxalFrh1n91t6cbjLGDOF tEe8smb3IVhumdNfihUCaHb37vkV3MUBMfBBbCIunxJScrxJioGKnR3StXCAzUvi1Lsn dV37hNEu/aDOH1ng9syqoLLziSjI+ACMn8QY845CV9Tjzidzku5ZJCIFlopBjuGvbvnM 8dED5h/nsKL9v1ML1+tfEwmGr/XfMr4mkPBexxEnOhZwGxdg40ffhjcPSGOfJB7KARtR w3DA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679524061; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9QVfQLLS1pRC6IGhHQ3GM79qE9kCVzjnkNPykrFgYP8=; b=A5efcFUGzWeqRHkHP10dKDQ1WT3kt34dWcvGFyr6UWsG+Z5iWEWc7hnCaRD1ldnTgY P1GSTJVQVqg9Fb6b1LBR6yNdaOqcV+3hc8HhtZbWglkN1X3lwy1T+aKs7eZbaILZcbBh mXfD08BHeZyXf78BeIC02C597iGAB8MU8q6cxD2lls2Ii9paKZPF9QgPosyvpIlR9y3+ GclJ1wUjDaPT2jZh07AO0EGRB+5EsRK9+u1NJYzdxwg/sfBWW4YeKXSeRFJJETzdRZSm YdhbqpDhZtm0LIqiB4hfbQbka2BTRJ2OM9EeRyoF35fNenlibsKt5pSuoPAf021eisjl CT5A== X-Gm-Message-State: AAQBX9de91goRO2VZijExcJeQJr8XyKm5Y3HZ1qyZ+uNHZA0hNDQKEJ4 I/qn9lwUowsxwDMpjbmiZZAsNFpOJq8pagVrVaA= X-Google-Smtp-Source: AKy350ZWRp6nQx6lCVGdboUGvGdyKCHy+jnhEB8PjX7lnqP4pKTS234Qqk+crvS1jsQEfVBnAj88PQ== X-Received: by 2002:a05:6870:f154:b0:172:899a:f473 with SMTP id l20-20020a056870f15400b00172899af473mr798187oac.42.1679523638180; Wed, 22 Mar 2023 15:20:38 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liweiwei@iscas.ac.cn, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, Daniel Henrique Barboza Subject: [PATCH for-8.1 v4 05/25] target/riscv/cpu.c: add priv_spec validate/disable_exts helpers Date: Wed, 22 Mar 2023 19:19:44 -0300 Message-Id: <20230322222004.357013-6-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230322222004.357013-1-dbarboza@ventanamicro.com> References: <20230322222004.357013-1-dbarboza@ventanamicro.com> 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::1131; envelope-from=dbarboza@ventanamicro.com; helo=mail-yw1-x1131.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 autolearn=unavailable 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ventanamicro.com) X-ZM-MESSAGEID: 1679528381628100001 Content-Type: text/plain; charset="utf-8" We're doing env->priv_spec validation and assignment at the start of riscv_cpu_realize(), which is fine, but then we're doing a force disable on extensions that aren't compatible with the priv version. This second step is being done too early. The disabled extensions might be re-enabled again in riscv_cpu_validate_set_extensions() by accident. A better place to put this code is at the end of riscv_cpu_validate_set_extensions() after all the validations are completed. Add a new helper, riscv_cpu_disable_priv_spec_isa_exts(), to disable the extesions after the validation is done. While we're at it, create a riscv_cpu_validate_priv_spec() helper to host all env->priv_spec related validation to unclog riscv_cpu_realize a bit. Signed-off-by: Daniel Henrique Barboza Reviewed-by: LIU Zhiwei --- target/riscv/cpu.c | 91 ++++++++++++++++++++++++++++------------------ 1 file changed, 56 insertions(+), 35 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 1ee322001b..17b301967c 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -833,6 +833,52 @@ static void riscv_cpu_validate_v(CPURISCVState *env, R= ISCVCPUConfig *cfg, env->vext_ver =3D vext_version; } =20 +static void riscv_cpu_validate_priv_spec(RISCVCPU *cpu, Error **errp) +{ + CPURISCVState *env =3D &cpu->env; + int priv_version =3D -1; + + if (cpu->cfg.priv_spec) { + if (!g_strcmp0(cpu->cfg.priv_spec, "v1.12.0")) { + priv_version =3D PRIV_VERSION_1_12_0; + } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) { + priv_version =3D PRIV_VERSION_1_11_0; + } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.10.0")) { + priv_version =3D PRIV_VERSION_1_10_0; + } else { + error_setg(errp, + "Unsupported privilege spec version '%s'", + cpu->cfg.priv_spec); + return; + } + + env->priv_ver =3D priv_version; + } +} + +static void riscv_cpu_disable_priv_spec_isa_exts(RISCVCPU *cpu) +{ + CPURISCVState *env =3D &cpu->env; + int i; + + /* Force disable extensions if priv spec version does not match */ + for (i =3D 0; i < ARRAY_SIZE(isa_edata_arr); i++) { + if (isa_ext_is_enabled(cpu, &isa_edata_arr[i]) && + (env->priv_ver < isa_edata_arr[i].min_version)) { + isa_ext_update_enabled(cpu, &isa_edata_arr[i], false); +#ifndef CONFIG_USER_ONLY + warn_report("disabling %s extension for hart 0x" TARGET_FMT_lx + " because privilege spec version does not match", + isa_edata_arr[i].name, env->mhartid); +#else + warn_report("disabling %s extension because " + "privilege spec version does not match", + isa_edata_arr[i].name); +#endif + } + } +} + /* * Check consistency between chosen extensions while setting * cpu->cfg accordingly, doing a set_misa() in the end. @@ -1002,6 +1048,12 @@ static void riscv_cpu_validate_set_extensions(RISCVC= PU *cpu, Error **errp) cpu->cfg.ext_zksh =3D true; } =20 + /* + * Disable isa extensions based on priv spec after we + * validated and set everything we need. + */ + riscv_cpu_disable_priv_spec_isa_exts(cpu); + if (cpu->cfg.ext_i) { ext |=3D RVI; } @@ -1131,7 +1183,6 @@ static void riscv_cpu_realize(DeviceState *dev, Error= **errp) CPURISCVState *env =3D &cpu->env; RISCVCPUClass *mcc =3D RISCV_CPU_GET_CLASS(dev); CPUClass *cc =3D CPU_CLASS(mcc); - int i, priv_version =3D -1; Error *local_err =3D NULL; =20 cpu_exec_realizefn(cs, &local_err); @@ -1140,40 +1191,10 @@ static void riscv_cpu_realize(DeviceState *dev, Err= or **errp) return; } =20 - if (cpu->cfg.priv_spec) { - if (!g_strcmp0(cpu->cfg.priv_spec, "v1.12.0")) { - priv_version =3D PRIV_VERSION_1_12_0; - } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) { - priv_version =3D PRIV_VERSION_1_11_0; - } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.10.0")) { - priv_version =3D PRIV_VERSION_1_10_0; - } else { - error_setg(errp, - "Unsupported privilege spec version '%s'", - cpu->cfg.priv_spec); - return; - } - } - - if (priv_version >=3D PRIV_VERSION_1_10_0) { - env->priv_ver =3D priv_version; - } - - /* Force disable extensions if priv spec version does not match */ - for (i =3D 0; i < ARRAY_SIZE(isa_edata_arr); i++) { - if (isa_ext_is_enabled(cpu, &isa_edata_arr[i]) && - (env->priv_ver < isa_edata_arr[i].min_version)) { - isa_ext_update_enabled(cpu, &isa_edata_arr[i], false); -#ifndef CONFIG_USER_ONLY - warn_report("disabling %s extension for hart 0x" TARGET_FMT_lx - " because privilege spec version does not match", - isa_edata_arr[i].name, env->mhartid); -#else - warn_report("disabling %s extension because " - "privilege spec version does not match", - isa_edata_arr[i].name); -#endif - } + riscv_cpu_validate_priv_spec(cpu, &local_err); + if (local_err !=3D NULL) { + error_propagate(errp, local_err); + return; } =20 if (cpu->cfg.epmp && !cpu->cfg.pmp) { --=20 2.39.2