From nobody Tue Feb 10 02:28:04 2026 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 ARC-Seal: i=1; a=rsa-sha256; t=1597315013; cv=none; d=zohomail.com; s=zohoarc; b=VKFVhvUZtWYaZDeL4VfsUgrNzjhbw9ceNIchkBrMdQkhJJbNkORrvlcsy7/oZ3oLuh++Gfa2bZEEqN9jPGT4k8+2jCULEzPPlD4kKW9oNsUGckeRVYWd7MChRk6V92DjGtxVyqBn5tr9oWNgYLy7yIu3JQxky5fSXUR1YQznXmY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1597315013; h=Content-Type: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=mSBA4HFmCeS4XwNuIJ+YBk+1DGPIB9hQs31Ni/M/afo=; b=D1YvGvL1ZMk/0nvQrlDq3LuVJK/1jSKHUoGjNckn17guddkzxzKC6neVjRNrgknsZaN/qJk/TLojCuoKFlrJAHLk9AvYWOMgs+Gr0pEMX0vTKiKhmV85/cvXyhl7hn/lCyJZZasoLr7/WzfUpk1qIuz6+0NTE+dgpjnTzhxzFxY= ARC-Authentication-Results: i=1; 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 1597315013058758.4884460339108; Thu, 13 Aug 2020 03:36:53 -0700 (PDT) Received: from localhost ([::1]:46536 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k6AbL-0006nc-QU for importer@patchew.org; Thu, 13 Aug 2020 06:36:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50008) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k6AXF-0000AU-9Q; Thu, 13 Aug 2020 06:32:37 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4185 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k6AXD-0006pp-5o; Thu, 13 Aug 2020 06:32:36 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 25E88F768B5D1C296E35; Thu, 13 Aug 2020 18:32:32 +0800 (CST) Received: from localhost.localdomain (10.175.104.175) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.487.0; Thu, 13 Aug 2020 18:32:21 +0800 From: Peng Liang To: , Subject: [RFC 6/9] target/arm: introduce KVM_CAP_ARM_CPU_FEATURE Date: Thu, 13 Aug 2020 18:26:54 +0800 Message-ID: <20200813102657.2588720-7-liangpeng10@huawei.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20200813102657.2588720-1-liangpeng10@huawei.com> References: <20200813102657.2588720-1-liangpeng10@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected 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=45.249.212.190; envelope-from=liangpeng10@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/13 06:32:27 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, drjones@redhat.com, zhang.zhanghailiang@huawei.com, mst@redhat.com, cohuck@redhat.com, xiexiangyou@huawei.com, Peng Liang , pbonzini@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Introduce KVM_CAP_ARM_CPU_FEATURE to check whether KVM supports to set CPU features in ARM. Signed-off-by: zhanghailiang Signed-off-by: Peng Liang --- linux-headers/linux/kvm.h | 1 + target/arm/cpu.c | 5 +++++ target/arm/kvm64.c | 14 ++++++++++++++ target/arm/kvm_arm.h | 7 +++++++ 4 files changed, 27 insertions(+) diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index a28c366737..0b83d2b4bb 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -1031,6 +1031,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_PPC_SECURE_GUEST 181 #define KVM_CAP_HALT_POLL 182 #define KVM_CAP_ASYNC_PF_INT 183 +#define KVM_CAP_ARM_CPU_FEATURE 187 =20 #ifdef KVM_CAP_IRQ_ROUTING =20 diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 4e67b8f22c..3fc54cb3a4 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -1539,6 +1539,11 @@ static void arm_cpu_set_bit_prop(Object *obj, Visito= r *v, const char *name, Error *local_err =3D NULL; bool value; =20 + if (!kvm_arm_cpu_feature_supported()) { + warn_report("KVM doesn't support to set CPU feature in arm. " + "Setting to `%s` is ignored.", name); + return; + } if (dev->realized) { qdev_prop_set_after_realize(dev, name, errp); return; diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index be2d0cda0d..e7470477d5 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -664,6 +664,20 @@ bool kvm_arm_sve_supported(void) return kvm_check_extension(kvm_state, KVM_CAP_ARM_SVE); } =20 +bool kvm_arm_cpu_feature_supported(void) +{ + static bool cpu_feature_initialized; + static bool cpu_feature_supported; + + if (!cpu_feature_initialized) { + cpu_feature_supported =3D kvm_check_extension(kvm_state, + KVM_CAP_ARM_CPU_FEATUR= E); + cpu_feature_initialized =3D true; + } + + return cpu_feature_supported; +} + QEMU_BUILD_BUG_ON(KVM_ARM64_SVE_VQ_MIN !=3D 1); =20 void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map) diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index 99035494ae..c2481ce464 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -290,6 +290,13 @@ bool kvm_arm_pmu_supported(void); */ bool kvm_arm_sve_supported(void); =20 +/** + * kvm_arm_cpu_feature_supported: + * + * Returns true if KVM can set CPU features and false otherwise. + */ +bool kvm_arm_cpu_feature_supported(void); + /** * kvm_arm_get_max_vm_ipa_size: * @ms: Machine state handle --=20 2.18.4