From nobody Fri Dec 19 17:23:36 2025 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; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1688992808; cv=none; d=zohomail.com; s=zohoarc; b=RgoeURtxMQfVD6AVmDqlU6RNblR9Ttzgf8qJ5frfqTCFVB4H19DrMjkTZQ3LpUyqski3M4b3HnSQbMEhwaCCeWsG8PcICfocwmdIApeGadEESeubIjDjfnCbNXVzgPMw2TtIR3IPgnq1WttrHagAzTxwjEHA59VadZjGXWyeUWk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1688992808; 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=iDRmXQvnLdoVOCAI6/ugg5UDxSskc2Ti6OsoBEXNbcQ=; b=Inl35bZG+cfZN/Tby4CkLSZOpZLtGgYsD+jW96gAGKYZTKJhmdb6gHBWOhI/42YfK8UKxJq4eSWJ4UyntHqXnxZR7GoI/kOyXDI3rq5E7n2w+NPJk1L3M6EQijcSds0v4XH8VEb46Wi07q5Ow+Cp2lPKeTM3Onjxdwgf2TZIrqQ= 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; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1688992808223232.03594866243077; Mon, 10 Jul 2023 05:40:08 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qIq6M-0005g2-Tj; Mon, 10 Jul 2023 08:34:51 -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 1qIq69-0005QR-Mj for qemu-devel@nongnu.org; Mon, 10 Jul 2023 08:34:38 -0400 Received: from mail-pf1-x432.google.com ([2607:f8b0:4864:20::432]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qIq65-0004wA-1X for qemu-devel@nongnu.org; Mon, 10 Jul 2023 08:34:37 -0400 Received: by mail-pf1-x432.google.com with SMTP id d2e1a72fcca58-66f5faba829so2362967b3a.3 for ; Mon, 10 Jul 2023 05:34:32 -0700 (PDT) Received: from toolbox.alistair23.me (2403-580b-97e8-0-321-6fb2-58f1-a1b1.ip6.aussiebb.net. [2403:580b:97e8:0:321:6fb2:58f1:a1b1]) by smtp.gmail.com with ESMTPSA id i126-20020a639d84000000b0055b44a901absm181559pgd.70.2023.07.10.05.34.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jul 2023 05:34:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1688992471; x=1691584471; 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=iDRmXQvnLdoVOCAI6/ugg5UDxSskc2Ti6OsoBEXNbcQ=; b=k3gkueiftVEaLGUj6g+8PzlQTEC8SJZm3bs/5DlkUZrnGyPATGoGs2FawPxeDTHR14 4wZdaoEczKmyrbf33hQpyFSqCZZ5V1NAY60UPZh+iZawunM3wk6n6Q/JX/SFKQnrGGCq OAcAmg0/owvrLUQ0/+GA17k8WnSVGh3TidvRrdK9QOKkrtCDEhF/cqno1U30bg825D/V FwDeywJTP0ix1pEi1mjoh5hLa2/ZvaM7eKHa4wXKWx48KxMKhSDU7qtm+da6HSxfyIlN JbiYAzDLrAIluUB78igkIfW5nYn6J6ulU2K0f+3RDbpf1/6Dq5B2FqeNz9AG4Zfdx/8P tnsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688992471; x=1691584471; 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=iDRmXQvnLdoVOCAI6/ugg5UDxSskc2Ti6OsoBEXNbcQ=; b=BY2I42sbxPA6eXB8+w/f2P6Z12X1Aar71apNSudWzKLCj9HRVLxjUdtoxC8o0wz1ly EPnCe6JXV8m5zFEk9e2SfkaNVDYbCldZBil1V0bin4ddjqfHgSUdHue7SL9MEqRZxvwn BXY5rK2mtePaK0dW8yYVctxQQCH2OsHLwVzRC/6JXLaC3+Da2IwsyaDpGDPYRrc7X5f+ p20vP0FJ+XZG6ON/eU3Pf9ZsdgfLUv9A6m9RJEYHlxq+sGubUbrJ7pdz+oOFxVpR+PWl /uwAqyPWcVFomiPy/vGv/XG4muYoB3dJLUgc0xtRxpAZejvA7yqUDdcQvMWqvO3Lhyjo mtJQ== X-Gm-Message-State: ABy/qLZ7rL+vxhLc1u3lr2HqyEppUE+uUBfbRitqDXabCzfzP0iFhtMu XhDs0SBdi4Gn8n5WgoHg5TUmWIB0XZhfww== X-Google-Smtp-Source: APBJJlEmCBZqvlrDSsiZArkoMr6+47Xrued66uefYm5UnY8KL/rlI89O73IJhcjTu7YhrnownUkcNg== X-Received: by 2002:a05:6a00:2d1c:b0:66b:8d48:8e64 with SMTP id fa28-20020a056a002d1c00b0066b8d488e64mr12268629pfb.12.1688992471546; Mon, 10 Jul 2023 05:34:31 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Daniel Henrique Barboza , Andrew Jones , Alistair Francis Subject: [PULL 38/54] target/riscv/cpu.c: restrict 'mimpid' value Date: Mon, 10 Jul 2023 22:31:49 +1000 Message-Id: <20230710123205.2441106-39-alistair.francis@wdc.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230710123205.2441106-1-alistair.francis@wdc.com> References: <20230710123205.2441106-1-alistair.francis@wdc.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::432; envelope-from=alistair23@gmail.com; helo=mail-pf1-x432.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01, T_SPF_TEMPERROR=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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1688992809325100005 Content-Type: text/plain; charset="utf-8" From: Daniel Henrique Barboza Following the same logic used with 'mvendorid' let's also restrict 'mimpid' for named CPUs. Generic CPUs keep setting the value freely. Note that we're getting rid of the default RISCV_CPU_MARCHID value. The reason is that this is not a good default since it's dynamic, changing with with every QEMU version, regardless of whether the actual implementation of the CPU changed from one QEMU version to the other. Named CPU should set it to a meaningful value instead and generic CPUs can set whatever they want. This is the error thrown for an invalid 'mimpid' value for the veyron-v1 CPU: $ ./qemu-system-riscv64 -M virt -nographic -cpu veyron-v1,mimpid=3D2 qemu-system-riscv64: can't apply global veyron-v1-riscv-cpu.mimpid=3D2: Unable to change veyron-v1-riscv-cpu mimpid (0x111) Signed-off-by: Daniel Henrique Barboza Reviewed-by: Andrew Jones Reviewed-by: Alistair Francis Message-Id: <20230706101738.460804-5-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis --- target/riscv/cpu.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index a778241d9f..477f8f8f97 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -43,7 +43,6 @@ #define RISCV_CPU_MARCHID ((QEMU_VERSION_MAJOR << 16) | \ (QEMU_VERSION_MINOR << 8) | \ (QEMU_VERSION_MICRO)) -#define RISCV_CPU_MIMPID RISCV_CPU_MARCHID =20 static const char riscv_single_letter_exts[] =3D "IEMAFDQCPVH"; =20 @@ -1813,7 +1812,6 @@ static Property riscv_cpu_properties[] =3D { DEFINE_PROP_BOOL("debug", RISCVCPU, cfg.debug, true), =20 DEFINE_PROP_UINT64("marchid", RISCVCPU, cfg.marchid, RISCV_CPU_MARCHID= ), - DEFINE_PROP_UINT64("mimpid", RISCVCPU, cfg.mimpid, RISCV_CPU_MIMPID), =20 #ifndef CONFIG_USER_ONLY DEFINE_PROP_UINT64("resetvec", RISCVCPU, env.resetvec, DEFAULT_RSTVEC), @@ -1932,6 +1930,35 @@ static void cpu_get_mvendorid(Object *obj, Visitor *= v, const char *name, visit_type_bool(v, name, &value, errp); } =20 +static void cpu_set_mimpid(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + bool dynamic_cpu =3D riscv_cpu_is_dynamic(obj); + RISCVCPU *cpu =3D RISCV_CPU(obj); + uint64_t prev_val =3D cpu->cfg.mimpid; + uint64_t value; + + if (!visit_type_uint64(v, name, &value, errp)) { + return; + } + + if (!dynamic_cpu && prev_val !=3D value) { + error_setg(errp, "Unable to change %s mimpid (0x%" PRIu64 ")", + object_get_typename(obj), prev_val); + return; + } + + cpu->cfg.mimpid =3D value; +} + +static void cpu_get_mimpid(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + bool value =3D RISCV_CPU(obj)->cfg.mimpid; + + visit_type_bool(v, name, &value, errp); +} + static void riscv_cpu_class_init(ObjectClass *c, void *data) { RISCVCPUClass *mcc =3D RISCV_CPU_CLASS(c); @@ -1966,6 +1993,9 @@ static void riscv_cpu_class_init(ObjectClass *c, void= *data) object_class_property_add(c, "mvendorid", "uint32", cpu_get_mvendorid, cpu_set_mvendorid, NULL, NULL); =20 + object_class_property_add(c, "mimpid", "uint64", cpu_get_mimpid, + cpu_set_mimpid, NULL, NULL); + device_class_set_props(dc, riscv_cpu_properties); } =20 --=20 2.40.1