From nobody Wed Nov 27 18:28:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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 169761957454294.31194459922187; Wed, 18 Oct 2023 01:59:34 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qt2Od-00041F-DM; Wed, 18 Oct 2023 04:59:19 -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 1qt2Oa-00040M-Vl for qemu-devel@nongnu.org; Wed, 18 Oct 2023 04:59:16 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qt2OW-0002mL-BY for qemu-devel@nongnu.org; Wed, 18 Oct 2023 04:59:16 -0400 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxbOpbni9l3NUyAA--.5292S3; Wed, 18 Oct 2023 16:59:08 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxbNxani9lTf0oAA--.20518S4; Wed, 18 Oct 2023 16:59:07 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, philmd@redhat.com, peter.maydell@linaro.org, eblake@redhat.com, armbru@redhat.com, maobibo@loongson.cn Subject: [PATCH v1 2/3] target/loongarch: Allow user enable/disable LSX/LASX features Date: Wed, 18 Oct 2023 16:59:07 +0800 Message-Id: <20231018085908.3327130-3-gaosong@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20231018085908.3327130-1-gaosong@loongson.cn> References: <20231018085908.3327130-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8BxbNxani9lTf0oAA--.20518S4 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== 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=114.242.206.163; envelope-from=gaosong@loongson.cn; helo=mail.loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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-ZM-MESSAGEID: 1697619576499100005 Content-Type: text/plain; charset="utf-8" Some users may not need LSX/LASX, this patch allows the user enable/disable LSX/LASX features. e.g '-cpu max,lsx=3Don,lasx=3Don' (default); '-cpu max,lsx=3Don,lasx=3Doff' (enabled LSX); '-cpu max,lsx=3Doff,lasx=3Don' (error, need lsx=3Don); '-cpu max,lsx=3Doff' (disable LSX and LASX). Signed-off-by: Song Gao --- target/loongarch/cpu.c | 64 ++++++++++++++++++++++++++++++++++++++++++ target/loongarch/cpu.h | 7 +++++ 2 files changed, 71 insertions(+) diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index ef6922e812..8a47d85d8a 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -478,6 +478,7 @@ static void loongarch_max_initfn(Object *obj) { /* '-cpu max' for TCG: we use cpu la464. */ loongarch_la464_initfn(obj); + loongarch_cpu_post_init(obj); } =20 static void loongarch_cpu_list_entry(gpointer data, gpointer user_data) @@ -622,6 +623,69 @@ static const MemoryRegionOps loongarch_qemu_ops =3D { }; #endif =20 +static bool loongarch_get_lsx(Object *obj, Error **errp) +{ + LoongArchCPU *cpu =3D LOONGARCH_CPU(obj); + + if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LSX)) { + cpu->has_lsx =3D true; + } else { + cpu->has_lsx =3D false; + } + return cpu->has_lsx; +} + +static void loongarch_set_lsx(Object *obj, bool value, Error **errp) +{ + LoongArchCPU *cpu =3D LOONGARCH_CPU(obj); + + if (value) { + cpu->env.cpucfg[2] =3D FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX= , 1); + } else { + cpu->env.cpucfg[2] =3D FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX= , 0); + cpu->env.cpucfg[2] =3D FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LAS= X, 0); + } + + cpu->has_lsx =3D value; +} + +static bool loongarch_get_lasx(Object *obj, Error **errp) +{ + LoongArchCPU *cpu =3D LOONGARCH_CPU(obj); + + if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LASX)) { + cpu->has_lasx =3D true; + } else { + cpu->has_lasx =3D false; + } + return cpu->has_lasx; +} + +static void loongarch_set_lasx(Object *obj, bool value, Error **errp) +{ + LoongArchCPU *cpu =3D LOONGARCH_CPU(obj); + + if (value) { + if (!FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LSX)) { + error_setg(errp, "Enabled LASX, need enabled LSX first!"); + return; + } + cpu->env.cpucfg[2] =3D FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LAS= X, 1); + } else { + cpu->env.cpucfg[2] =3D FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LAS= X, 0); + } + + cpu->has_lasx =3D value; +} + +void loongarch_cpu_post_init(Object *obj) +{ + object_property_add_bool(obj, "lsx", loongarch_get_lsx, + loongarch_set_lsx); + object_property_add_bool(obj, "lasx", loongarch_get_lasx, + loongarch_set_lasx); +} + static void loongarch_cpu_init(Object *obj) { #ifndef CONFIG_USER_ONLY diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index 8b54cf109c..d927377c49 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -381,6 +381,11 @@ struct ArchCPU { =20 /* 'compatible' string for this CPU for Linux device trees */ const char *dtb_compatible; + + /* CPU has LSX */ + bool has_lsx; + /* CPU has LASX */ + bool has_lasx; }; =20 #define TYPE_LOONGARCH_CPU "loongarch-cpu" @@ -486,4 +491,6 @@ void loongarch_cpu_list(void); #define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX #define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU =20 +void loongarch_cpu_post_init(Object *obj); + #endif /* LOONGARCH_CPU_H */ --=20 2.25.1