From patchwork Thu Sep 17 12:14:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Liang X-Patchwork-Id: 11782397 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 E07636CA for ; Thu, 17 Sep 2020 12:36:44 +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 AA2F3208E4 for ; Thu, 17 Sep 2020 12:36:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AA2F3208E4 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]:58650 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kIt9X-0005of-FF for patchwork-qemu-devel@patchwork.kernel.org; Thu, 17 Sep 2020 08:36:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35048) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kIswp-0008SX-18; Thu, 17 Sep 2020 08:23:35 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4762 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 1kIswl-0003Q3-JK; Thu, 17 Sep 2020 08:23:34 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 9911C12C27E53089ABD5; Thu, 17 Sep 2020 20:23:26 +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, 17 Sep 2020 20:23:15 +0800 From: Peng Liang To: , Subject: [RFC v2 05/10] target/arm: Introduce kvm_arm_cpu_feature_supported Date: Thu, 17 Sep 2020 20:14:44 +0800 Message-ID: <20200917121449.3442059-6-liangpeng10@huawei.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200917121449.3442059-1-liangpeng10@huawei.com> References: <20200917121449.3442059-1-liangpeng10@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.191; envelope-from=liangpeng10@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/17 08:23:14 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=0.001, RCVD_IN_MSPIKE_WL=0.001, 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+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/kvm_arm.h | 7 +++++++ target/arm/kvm64.c | 14 ++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index bc178eeb84c0..33b3f107b47d 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); +/** + * 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 diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index 542ade8fac9d..d0a8a7e8194a 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -663,6 +663,20 @@ bool kvm_arm_sve_supported(void) return kvm_check_extension(kvm_state, KVM_CAP_ARM_SVE); } +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)