From nobody Tue Nov 26 19:37:57 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.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; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1706153404; cv=none; d=zohomail.com; s=zohoarc; b=DU4X67YI041wfYLwMtt8YuWYmgcJ+kcyH0qQ3muMaMiU2nCUAM1xrM7sLURXVlkBadVa/EBzPtghIcd28FCl8G1B8jPCv6owydq3vTEWxoE5AcAJv3KO8sPCwNW9o4J2tmH+8trb3hZ3V2rPE3QbaNOleM8y3x2HAHQ85lWfuz4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1706153404; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=JJO+A2SAMz3RWzMm9Gi9I7eGDEVztKylijzEMPo6ABA=; b=NfoFRtZs6psr2lmNVKhY6fSXSszTMSr3fgARezjfGQZnWdq64JqrOdhU8U6yHhUMUsiikCwdpXxgqytkUFsKtvq2SnRcrAUOZK6Dczq3YApWQNfljNt57etibF/qiRy9GzlqNyEUOR+VMgVR4u00VThhsm/XqizEEiZubRPdi3M= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.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; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1706153404451895.035626353464; Wed, 24 Jan 2024 19:30:04 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSqR6-0007jr-NK; Wed, 24 Jan 2024 22:29:52 -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 1rSqR1-0007J7-CV for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:29:47 -0500 Received: from mgamail.intel.com ([192.198.163.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqQz-0001Dr-Ev for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:29:47 -0500 Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 19:26:23 -0800 Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa005.jf.intel.com with ESMTP; 24 Jan 2024 19:26:18 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706153385; x=1737689385; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EE0DYG8gi6shevrgMdBcMEkb8MmHXEhC21dRwuCBxTk=; b=O8QCvujkz+HE0i0Hxr65lA1rJj7qRYqUXNjIGhwY6XLzeEiNkDe1BBi1 s5Cm35llw8I3P8/2Db5v59Y5sR2kw+A4OVYQ5cvjM2e8t8C4LYT8Ldp4M iw9EqzoIeOEq9SZAfhuDEMj397WZwNKEbKNPwLCwms3OhcH7zT4ITd60q GKtKx7huwkl41WSp/z32G4Vr5XcDMEEWIIqUpFvJW4s5hk7d6HKEdVGJ7 KCHFenZIGOcgomwSoCIxUcsCbdAFY4p4FPxwKt0NWE+Rb7t9m9393VCX9 nvurkTTLjmzHkPHbQ/GvmYpK/Jjfdj0JLRQ4zqYIuBZDy33NUI0yb8S7q Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9429044" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9429044" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2085731" From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Cornelia Huck , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v4 30/66] i386/tdx: Implement user specified tsc frequency Date: Wed, 24 Jan 2024 22:22:52 -0500 Message-Id: <20240125032328.2522472-31-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125032328.2522472-1-xiaoyao.li@intel.com> References: <20240125032328.2522472-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=192.198.163.10; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.999, HK_RANDOM_FROM=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1706153406403100003 Content-Type: text/plain; charset="utf-8" Reuse "-cpu,tsc-frequency=3D" to get user wanted tsc frequency and call VM scope VM_SET_TSC_KHZ to set the tsc frequency of TD before KVM_TDX_INIT_VM. Besides, sanity check the tsc frequency to be in the legal range and legal granularity (required by TDX module). Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann --- Changes in v3: - use @errp to report error info; (Daniel) Changes in v1: - Use VM scope VM_SET_TSC_KHZ to set the TSC frequency of TD since KVM side drop the @tsc_khz field in struct kvm_tdx_init_vm --- target/i386/kvm/kvm.c | 9 +++++++++ target/i386/kvm/tdx.c | 25 +++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index fa07daad607a..348f76a9cb81 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -794,6 +794,15 @@ static int kvm_arch_set_tsc_khz(CPUState *cs) int r, cur_freq; bool set_ioctl =3D false; =20 + /* + * TSC of TD vcpu is immutable, it cannot be set/changed via vcpu scope + * VM_SET_TSC_KHZ, but only be initialized via VM scope VM_SET_TSC_KHZ + * before ioctl KVM_TDX_INIT_VM in tdx_pre_create_vcpu() + */ + if (is_tdx_vm()) { + return 0; + } + if (!env->tsc_khz) { return 0; } diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index ead19923f318..a27c7b068a07 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -33,6 +33,9 @@ (1U << KVM_FEATURE_PV_SCHED_YIELD) | \ (1U << KVM_FEATURE_MSI_EXT_DEST_ID)) =20 +#define TDX_MIN_TSC_FREQUENCY_KHZ (100 * 1000) +#define TDX_MAX_TSC_FREQUENCY_KHZ (10 * 1000 * 1000) + #define TDX_TD_ATTRIBUTES_DEBUG BIT_ULL(0) #define TDX_TD_ATTRIBUTES_SEPT_VE_DISABLE BIT_ULL(28) #define TDX_TD_ATTRIBUTES_PKS BIT_ULL(30) @@ -565,6 +568,28 @@ int tdx_pre_create_vcpu(CPUState *cpu, Error **errp) return r; } =20 + if (env->tsc_khz && (env->tsc_khz < TDX_MIN_TSC_FREQUENCY_KHZ || + env->tsc_khz > TDX_MAX_TSC_FREQUENCY_KHZ)) { + error_setg(errp, "Invalid TSC %ld KHz, must specify cpu_frequency = between [%d, %d] kHz", + env->tsc_khz, TDX_MIN_TSC_FREQUENCY_KHZ, + TDX_MAX_TSC_FREQUENCY_KHZ); + return -EINVAL; + } + + if (env->tsc_khz % (25 * 1000)) { + error_setg(errp, "Invalid TSC %ld KHz, it must be multiple of 25MH= z", + env->tsc_khz); + return -EINVAL; + } + + /* it's safe even env->tsc_khz is 0. KVM uses host's tsc_khz in this c= ase */ + r =3D kvm_vm_ioctl(kvm_state, KVM_SET_TSC_KHZ, env->tsc_khz); + if (r < 0) { + error_setg_errno(errp, -r, "Unable to set TSC frequency to %" PRId= 64 " kHz", + env->tsc_khz); + return r; + } + r =3D setup_td_guest_attributes(x86cpu, errp); if (r) { return r; --=20 2.34.1