From nobody Mon Mar 17 03:55:10 2025 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 DE15AC4332F for ; Thu, 9 Nov 2023 11:58:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234340AbjKIL6V (ORCPT ); Thu, 9 Nov 2023 06:58:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234702AbjKIL5y (ORCPT ); Thu, 9 Nov 2023 06:57:54 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D9503243; Thu, 9 Nov 2023 03:57:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699531064; x=1731067064; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UivIbwKOnuoRy52iq1LnnkoCBbVc6eDzrqha0yv46l0=; b=O9AGUOemm6fVceECcMzUFbZfePU6zfGSfmAmYJpooKrKwjDjhqNk+7Al 0VJNckG6Crzyo5/Y9hNWp7k7eV0Nwh2uDb0tCyQrRgRpUqigSK3XtM0ES imzY02V6ay3aoV7m1X3F+K0ISKhdwqQdYWGgAY+S6fOmDty164fAOUH03 cPWML7ZPauO8Dy9vwGdNi7jTgSkhCYXjwagGaFdVtqkixBA5Xcyrej6VZ LCyriM3Tj37nWv7csIEd6/RLpyCs9rx4HCA4vnH5ag3OOp92hQWvSH4fF KTiMSiNfWsf6vOGikHR/CmxuqU2HmaBHVdKr53fZCsRXfUQ4Df8Q2Fiqm w==; X-IronPort-AV: E=McAfee;i="6600,9927,10888"; a="2936638" X-IronPort-AV: E=Sophos;i="6.03,289,1694761200"; d="scan'208";a="2936638" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2023 03:57:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10888"; a="766976787" X-IronPort-AV: E=Sophos;i="6.03,289,1694761200"; d="scan'208";a="766976787" Received: from shadphix-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.209.83.35]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Nov 2023 03:57:37 -0800 From: Kai Huang To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: x86@kernel.org, dave.hansen@intel.com, kirill.shutemov@linux.intel.com, peterz@infradead.org, tony.luck@intel.com, tglx@linutronix.de, bp@alien8.de, mingo@redhat.com, hpa@zytor.com, seanjc@google.com, pbonzini@redhat.com, rafael@kernel.org, david@redhat.com, dan.j.williams@intel.com, len.brown@intel.com, ak@linux.intel.com, isaku.yamahata@intel.com, ying.huang@intel.com, chao.gao@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, nik.borisov@suse.com, bagasdotme@gmail.com, sagis@google.com, imammedo@redhat.com, kai.huang@intel.com Subject: [PATCH v15 14/23] x86/virt/tdx: Configure TDX module with the TDMRs and global KeyID Date: Fri, 10 Nov 2023 00:55:51 +1300 Message-ID: <02423dbdd46c07016793290c6ed0300b5383d234.1699527082.git.kai.huang@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The TDX module uses a private KeyID as the "global KeyID" for mapping things like the PAMT and other TDX metadata. This KeyID has already been reserved when detecting TDX during the kernel early boot. After the list of "TD Memory Regions" (TDMRs) has been constructed to cover all TDX-usable memory regions, the next step is to pass them to the TDX module together with the global KeyID. Signed-off-by: Kai Huang Reviewed-by: Isaku Yamahata Reviewed-by: Kirill A. Shutemov Reviewed-by: Yuan Yao --- v14 -> v15: - No change v13 -> v14: - No change v12 -> v13: - Added Yuan's tag. v11 -> v12: - Added Kirill's tag v10 -> v11: - No update v9 -> v10: - Code change due to change static 'tdx_tdmr_list' to local 'tdmr_list'. v8 -> v9: - Improved changlog to explain why initializing TDMRs can take long time (Dave). - Improved comments around 'next-to-initialize' address (Dave). v7 -> v8: (Dave) - Changelog: - explicitly call out this is the last step of TDX module initialization. - Trimed down changelog by removing SEAMCALL name and details. - Removed/trimmed down unnecessary comments. - Other changes due to 'struct tdmr_info_list'. v6 -> v7: - Removed need_resched() check. -- Andi. --- arch/x86/virt/vmx/tdx/tdx.c | 44 ++++++++++++++++++++++++++++++++++++- arch/x86/virt/vmx/tdx/tdx.h | 2 ++ 2 files changed, 45 insertions(+), 1 deletion(-) diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index a3340a6e23c5..aba851e11c72 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -24,8 +24,10 @@ #include #include #include +#include #include #include +#include #include #include "tdx.h" =20 @@ -878,6 +880,41 @@ static int construct_tdmrs(struct list_head *tmb_list, return ret; } =20 +static int config_tdx_module(struct tdmr_info_list *tdmr_list, u64 global_= keyid) +{ + struct tdx_module_args args =3D {}; + u64 *tdmr_pa_array; + size_t array_sz; + int i, ret; + + /* + * TDMRs are passed to the TDX module via an array of physical + * addresses of each TDMR. The array itself also has certain + * alignment requirement. + */ + array_sz =3D tdmr_list->nr_consumed_tdmrs * sizeof(u64); + array_sz =3D roundup_pow_of_two(array_sz); + if (array_sz < TDMR_INFO_PA_ARRAY_ALIGNMENT) + array_sz =3D TDMR_INFO_PA_ARRAY_ALIGNMENT; + + tdmr_pa_array =3D kzalloc(array_sz, GFP_KERNEL); + if (!tdmr_pa_array) + return -ENOMEM; + + for (i =3D 0; i < tdmr_list->nr_consumed_tdmrs; i++) + tdmr_pa_array[i] =3D __pa(tdmr_entry(tdmr_list, i)); + + args.rcx =3D __pa(tdmr_pa_array); + args.rdx =3D tdmr_list->nr_consumed_tdmrs; + args.r8 =3D global_keyid; + ret =3D seamcall_prerr(TDH_SYS_CONFIG, &args); + + /* Free the array as it is not required anymore. */ + kfree(tdmr_pa_array); + + return ret; +} + static int init_tdx_module(void) { struct tdx_tdmr_sysinfo tdmr_sysinfo; @@ -914,16 +951,21 @@ static int init_tdx_module(void) if (ret) goto out_free_tdmrs; =20 + /* Pass the TDMRs and the global KeyID to the TDX module */ + ret =3D config_tdx_module(&tdmr_list, tdx_global_keyid); + if (ret) + goto out_free_pamts; + /* * TODO: * - * - Configure the TDMRs and the global KeyID to the TDX module. * - Configure the global KeyID on all packages. * - Initialize all TDMRs. * * Return error before all steps are done. */ ret =3D -EINVAL; +out_free_pamts: if (ret) tdmrs_free_pamt_all(&tdmr_list); else diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h index 1b04efece9db..fa5bcf8b5a9c 100644 --- a/arch/x86/virt/vmx/tdx/tdx.h +++ b/arch/x86/virt/vmx/tdx/tdx.h @@ -17,6 +17,7 @@ #define TDH_SYS_INIT 33 #define TDH_SYS_RD 34 #define TDH_SYS_LP_INIT 35 +#define TDH_SYS_CONFIG 45 =20 /* * Global scope metadata field ID. @@ -53,6 +54,7 @@ struct tdmr_reserved_area { } __packed; =20 #define TDMR_INFO_ALIGNMENT 512 +#define TDMR_INFO_PA_ARRAY_ALIGNMENT 512 =20 struct tdmr_info { u64 base; --=20 2.41.0