From mboxrd@z Thu Jan 1 00:00:00 1970 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 CC45EC433FE for ; Mon, 28 Feb 2022 02:15:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232496AbiB1CPh (ORCPT ); Sun, 27 Feb 2022 21:15:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231130AbiB1CPc (ORCPT ); Sun, 27 Feb 2022 21:15:32 -0500 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EB09E527EF; Sun, 27 Feb 2022 18:14:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646014495; x=1677550495; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=KCebEsUOr3JNBClpva5gMOxkilzblBWkeHW/AoIsJDM=; b=mxfoZTTV7sDP5hG6Iu8Y/+bTS7rxKeTbMuTkjJBHUkdZ8uSpJGr04Q/B 6Q+Cpk8UwAHx1A/AnRN50e2RzerZ3zznxB9L+Dy/gfxAbQVaxCOvSrwI3 Ki15W9Tt4CFXiPPMMHw1QDT3tI2TH/XI+OFXYeVinMQABQIyAQFDK3RTF E/U9KTmMDR+Oh9ymzQeFSrOloYa/zpHjVXKGKvT9Kcpm5D0wuq1kg29V9 zuRvHW4I2D3FMjKxb6GdQ7FJNhxWD6/iNwqyt+DPzFi54pr1psgWUXgvs d7Yf0jR6eWCm4aCaqpeAbTZY7C0GIDm//wI5stPsh2vHWcVXbZi2USsKG w==; X-IronPort-AV: E=McAfee;i="6200,9189,10271"; a="240191919" X-IronPort-AV: E=Sophos;i="5.90,142,1643702400"; d="scan'208";a="240191919" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2022 18:14:17 -0800 X-IronPort-AV: E=Sophos;i="5.90,142,1643702400"; d="scan'208";a="777936917" Received: from jdpanhor-mobl2.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.254.49.36]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2022 18:14:13 -0800 From: Kai Huang To: x86@kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@intel.com, luto@kernel.org, kvm@vger.kernel.org, pbonzini@redhat.com, seanjc@google.com, hpa@zytor.com, peterz@infradead.org, kirill.shutemov@linux.intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, tony.luck@intel.com, ak@linux.intel.com, dan.j.williams@intel.com, chang.seok.bae@intel.com, keescook@chromium.org, hengqi.arch@bytedance.com, laijs@linux.alibaba.com, metze@samba.org, linux-kernel@vger.kernel.org, kai.huang@intel.com Subject: [RFC PATCH 08/21] x86/virt/tdx: Do logical-cpu scope TDX module initialization Date: Mon, 28 Feb 2022 15:12:56 +1300 Message-Id: <3e36f9d3a3b98d6273c296aa17cd0105a27d44ab.1646007267.git.kai.huang@intel.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Logical-cpu scope initialization requires calling TDH.SYS.LP.INIT on all BIOS-enabled cpus, otherwise the TDH.SYS.CONFIG SEAMCALL will fail. TDH.SYS.LP.INIT can be called concurrently on all cpus. Following global initialization, do the logical-cpu scope initialization by calling TDH.SYS.LP.INIT on all online cpus. Whether all BIOS-enabled cpus are online is not checked here for simplicity. The user of TDX should guarantee all BIOS-enabled cpus are online. Signed-off-by: Kai Huang --- arch/x86/virt/vmx/tdx.c | 12 ++++++++++++ arch/x86/virt/vmx/tdx.h | 1 + 2 files changed, 13 insertions(+) diff --git a/arch/x86/virt/vmx/tdx.c b/arch/x86/virt/vmx/tdx.c index 197c721d5388..c9de3d6f903d 100644 --- a/arch/x86/virt/vmx/tdx.c +++ b/arch/x86/virt/vmx/tdx.c @@ -462,6 +462,13 @@ static int __tdx_detect(void) return -ENODEV; } +static int tdx_module_init_cpus(void) +{ + struct seamcall_ctx sc = { .fn = TDH_SYS_LP_INIT }; + + return seamcall_on_each_cpu(&sc); +} + static int init_tdx_module(void) { int ret; @@ -471,6 +478,11 @@ static int init_tdx_module(void) if (ret) goto out; + /* Logical-cpu scope initialization */ + ret = tdx_module_init_cpus(); + if (ret) + goto out; + /* * Return -EFAULT until all steps of TDX module * initialization are done. diff --git a/arch/x86/virt/vmx/tdx.h b/arch/x86/virt/vmx/tdx.h index f0983b1936d8..b8cfdd6e12f3 100644 --- a/arch/x86/virt/vmx/tdx.h +++ b/arch/x86/virt/vmx/tdx.h @@ -39,6 +39,7 @@ struct p_seamldr_info { * TDX module SEAMCALL leaf functions */ #define TDH_SYS_INIT 33 +#define TDH_SYS_LP_INIT 35 #define TDH_SYS_LP_SHUTDOWN 44 struct tdx_module_output; -- 2.33.1