From patchwork Mon Nov 2 05:40:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Liang X-Patchwork-Id: 11872989 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 325306A2 for ; Mon, 2 Nov 2020 05:48:15 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 043B422273 for ; Mon, 2 Nov 2020 05:48:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 043B422273 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:47744 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kZShS-00086b-10 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 02 Nov 2020 00:48:14 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51160) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kZSdL-0002Ps-4E; Mon, 02 Nov 2020 00:43:59 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:2378) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kZSdG-0001IH-Mq; Mon, 02 Nov 2020 00:43:58 -0500 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CPhft41Vcz15PqN; Mon, 2 Nov 2020 13:43:50 +0800 (CST) Received: from localhost.localdomain (10.175.124.27) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.487.0; Mon, 2 Nov 2020 13:43:41 +0800 From: Peng Liang To: , Subject: [RFC v3 05/10] target/arm: Introduce kvm_arm_cpu_feature_supported Date: Mon, 2 Nov 2020 13:40:50 +0800 Message-ID: <20201102054055.686143-6-liangpeng10@huawei.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201102054055.686143-1-liangpeng10@huawei.com> References: <20201102054055.686143-1-liangpeng10@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.124.27] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.190; envelope-from=liangpeng10@huawei.com; helo=szxga04-in.huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/02 00:43:42 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [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_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: 2.1.23 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Introduce kvm_arm_cpu_feature_supported to check whether KVM supports to set CPU features in ARM. Signed-off-by: zhanghailiang Signed-off-by: Peng Liang --- target/arm/kvm64.c | 14 ++++++++++++++ target/arm/kvm_arm.h | 7 +++++++ 2 files changed, 21 insertions(+) diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index 86a5bca5a4ec..5700c4084090 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -721,6 +721,20 @@ bool kvm_arm_steal_time_supported(void) return kvm_check_extension(kvm_state, KVM_CAP_STEAL_TIME); } +bool kvm_arm_cpu_feature_supported(void) +{ + static bool cpu_feature_initialized; + static bool cpu_feature_supported; + + if (!cpu_feature_initialized) { + cpu_feature_supported = kvm_check_extension(kvm_state, + KVM_CAP_ARM_CPU_FEATURE); + cpu_feature_initialized = true; + } + + return cpu_feature_supported; +} + QEMU_BUILD_BUG_ON(KVM_ARM64_SVE_VQ_MIN != 1); 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 eb81b7059eb1..a6a1df775cd2 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -308,6 +308,13 @@ bool kvm_arm_pmu_supported(void); */ bool kvm_arm_sve_supported(void); +/** + * 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