From patchwork Wed Nov 8 18:29:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 742455 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B5A3C4332F for ; Wed, 8 Nov 2023 19:00:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232778AbjKHTAe (ORCPT ); Wed, 8 Nov 2023 14:00:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232575AbjKHTAY (ORCPT ); Wed, 8 Nov 2023 14:00:24 -0500 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C12B211B; Wed, 8 Nov 2023 11:00:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699470023; x=1731006023; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jUWUSU0yemX10hpGHyFVYNgeNUAOt//vvysT2zi1z38=; b=aLw8KsUcHEfiXXdG2SO22WOmbKy5+P20UUlX9Z5nVMl2ffgeC2mshU6H jJBV9DRBiKVCnp6icqg4fDgukZMujxL8sFmP44bkEUCbtBLBFSO1eWjNV 3UYJMHCoLog3VJ28+iWFxpDlK/ZlEUwknzTBxW0eO6WrFBdWqs7sBMXWE qmgAUCgzqqQt8Np0+c71E8fuVRu5GlTyOUQnfLtQhV5lcm9wgFyi67+mG RKRIQyd6hVH8Om8H2vnBdexUNpHLghCz+bltMw5LgjB4nl/K1WElAkUhn piwX/3jPTMIHNB4z9hRMXIv5owT4p2a4DL6EXTklMGncRqliG5LUF7Dzw Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10888"; a="8486337" X-IronPort-AV: E=Sophos;i="6.03,287,1694761200"; d="scan'208";a="8486337" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Nov 2023 11:00:22 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.03,287,1694761200"; d="scan'208";a="10892466" Received: from unknown (HELO fred..) ([172.25.112.68]) by orviesa001.jf.intel.com with ESMTP; 08 Nov 2023 11:00:21 -0800 From: Xin Li To: kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, corbet@lwn.net, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, vkuznets@redhat.com, peterz@infradead.org, ravi.v.shankar@intel.com Subject: [PATCH v1 11/23] KVM: x86: Add kvm_is_fred_enabled() Date: Wed, 8 Nov 2023 10:29:51 -0800 Message-ID: <20231108183003.5981-12-xin3.li@intel.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231108183003.5981-1-xin3.li@intel.com> References: <20231108183003.5981-1-xin3.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add kvm_is_fred_enabled() to get if FRED is enabled on a vCPU. Tested-by: Shan Kang Signed-off-by: Xin Li --- arch/x86/kvm/kvm_cache_regs.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h index 75eae9c4998a..390643e8c532 100644 --- a/arch/x86/kvm/kvm_cache_regs.h +++ b/arch/x86/kvm/kvm_cache_regs.h @@ -187,6 +187,16 @@ static __always_inline bool kvm_is_cr4_bit_set(struct kvm_vcpu *vcpu, return !!kvm_read_cr4_bits(vcpu, cr4_bit); } +static __always_inline bool kvm_is_fred_enabled(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_X86_64 + return cpu_feature_enabled(X86_FEATURE_FRED) && + kvm_is_cr4_bit_set(vcpu, X86_CR4_FRED); +#else + return false; +#endif +} + static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu) { if (!kvm_register_is_available(vcpu, VCPU_EXREG_CR3))