From nobody Tue Nov 26 18:24:04 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 1706167932416483.41160209340603; Wed, 24 Jan 2024 23:32:12 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSuDL-0007lJ-EW; Thu, 25 Jan 2024 02:31:55 -0500 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 1rSuDI-0007jG-OH for qemu-devel@nongnu.org; Thu, 25 Jan 2024 02:31:53 -0500 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSuDG-0000gr-34 for qemu-devel@nongnu.org; Thu, 25 Jan 2024 02:31:52 -0500 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxuuhjDrJlB20FAA--.936S3; Thu, 25 Jan 2024 15:31:47 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxHs9gDrJlHeQYAA--.42878S4; Thu, 25 Jan 2024 15:31:45 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, Bibo Mao Subject: [PULL 2/2] target/loongarch/kvm: Enable LSX/LASX extension Date: Thu, 25 Jan 2024 15:15:37 +0800 Message-Id: <20240125071537.53397-3-gaosong@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20240125071537.53397-1-gaosong@loongson.cn> References: <20240125071537.53397-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8AxHs9gDrJlHeQYAA--.42878S4 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, 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-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1706167933508100003 Content-Type: text/plain; charset="utf-8" The kernel had already support LSX and LASX [1], but QEMU is disable LSX/LASX for kvm. This patch adds kvm_check_cpucfg2() to check CPUCFG2. [1]: https://lore.kernel.org/all/CABgObfZHRf7E_7Jk4uPRmSyxTy3EiuuYwHC35jQnc= NL9s-zTDA@mail.gmail.com/ Signed-off-by: Song Gao Reviewed-by: Bibo Mao Message-Id: <20240122090206.1083584-1-gaosong@loongson.cn> --- linux-headers/asm-loongarch/kvm.h | 1 + target/loongarch/kvm/kvm.c | 45 ++++++++++++++++++++++++++----- 2 files changed, 39 insertions(+), 7 deletions(-) diff --git a/linux-headers/asm-loongarch/kvm.h b/linux-headers/asm-loongarc= h/kvm.h index c6ad2ee610..923d0bd382 100644 --- a/linux-headers/asm-loongarch/kvm.h +++ b/linux-headers/asm-loongarch/kvm.h @@ -79,6 +79,7 @@ struct kvm_fpu { #define LOONGARCH_REG_64(TYPE, REG) (TYPE | KVM_REG_SIZE_U64 | (REG << LOO= NGARCH_REG_SHIFT)) #define KVM_IOC_CSRID(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, REG) #define KVM_IOC_CPUCFG(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, RE= G) +#define KVM_LOONGARCH_VCPU_CPUCFG 0 =20 struct kvm_debug_exit_arch { }; diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c index 2230f029d0..c19978a970 100644 --- a/target/loongarch/kvm/kvm.c +++ b/target/loongarch/kvm/kvm.c @@ -540,6 +540,38 @@ static int kvm_loongarch_get_cpucfg(CPUState *cs) return ret; } =20 +static int kvm_check_cpucfg2(CPUState *cs) +{ + int ret; + uint64_t val; + struct kvm_device_attr attr =3D { + .group =3D KVM_LOONGARCH_VCPU_CPUCFG, + .attr =3D 2, + .addr =3D (uint64_t)&val, + }; + LoongArchCPU *cpu =3D LOONGARCH_CPU(cs); + CPULoongArchState *env =3D &cpu->env; + + ret =3D kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, &attr); + + if (!ret) { + kvm_vcpu_ioctl(cs, KVM_GET_DEVICE_ATTR, &attr); + env->cpucfg[2] &=3D val; + + if (FIELD_EX32(env->cpucfg[2], CPUCFG2, FP)) { + /* The FP minimal version is 1. */ + env->cpucfg[2] =3D FIELD_DP32(env->cpucfg[2], CPUCFG2, FP_VER,= 1); + } + + if (FIELD_EX32(env->cpucfg[2], CPUCFG2, LLFTP)) { + /* The LLFTP minimal version is 1. */ + env->cpucfg[2] =3D FIELD_DP32(env->cpucfg[2], CPUCFG2, LLFTP_V= ER, 1); + } + } + + return ret; +} + static int kvm_loongarch_put_cpucfg(CPUState *cs) { int i, ret =3D 0; @@ -548,14 +580,13 @@ static int kvm_loongarch_put_cpucfg(CPUState *cs) uint64_t val; =20 for (i =3D 0; i < 21; i++) { + if (i =3D=3D 2) { + ret =3D kvm_check_cpucfg2(cs); + if (ret) { + return ret; + } + } val =3D env->cpucfg[i]; - /* LSX and LASX and LBT are not supported in kvm now */ - if (i =3D=3D 2) { - val &=3D ~(BIT(R_CPUCFG2_LSX_SHIFT) | BIT(R_CPUCFG2_LASX_SHIFT= )); - val &=3D ~(BIT(R_CPUCFG2_LBT_X86_SHIFT) | - BIT(R_CPUCFG2_LBT_ARM_SHIFT) | - BIT(R_CPUCFG2_LBT_MIPS_SHIFT)); - } ret =3D kvm_set_one_reg(cs, KVM_IOC_CPUCFG(i), &val); if (ret < 0) { trace_kvm_failed_put_cpucfg(strerror(errno)); --=20 2.25.1