From patchwork Mon Nov 21 00:26:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 13050232 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 BD8AAC4332F for ; Mon, 21 Nov 2022 00:28:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229842AbiKUA2J (ORCPT ); Sun, 20 Nov 2022 19:28:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57332 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229845AbiKUA1b (ORCPT ); Sun, 20 Nov 2022 19:27:31 -0500 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D37B0B63; Sun, 20 Nov 2022 16:27:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668990449; x=1700526449; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gOZ0T77u1owzOZnOoSrcaq1f36vBbh2UkFPGd0zudQU=; b=fshP4RzAcPivCZj9voHBLtObrFqIdBHHUw6YCKJkzpzrfb70Yrw2mXjE GRC4x/1V1l3HBSczukuhLob81yms3MdDjLnOBta40Jm9mIEmGC3WFsixG gaBWVH18haj7xzbaoLGuoroMNq3P1wfngG4XHZhgkmMhkM5YUhrkE6SUk 8Phd6FJ4CWaIuuQWBnkSdCXL+1CYhqGEG9l3Pab1Aq2pWvdS3LaeCLK/h OhVJSZyEiNhVKv/JMvwiuDQI1fSSMpgbvkfIm+7gdriBlxT7R0FuiXcf+ qd6nh8tF4LjhwxleTUe99zV16JyPrn8KNtqpdZh7h1ofJpwV7A9U4miJ9 A==; X-IronPort-AV: E=McAfee;i="6500,9779,10537"; a="399732315" X-IronPort-AV: E=Sophos;i="5.96,180,1665471600"; d="scan'208";a="399732315" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2022 16:27:29 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10537"; a="729825319" X-IronPort-AV: E=Sophos;i="5.96,180,1665471600"; d="scan'208";a="729825319" Received: from tomnavar-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.209.176.15]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2022 16:27:25 -0800 From: Kai Huang To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: linux-mm@kvack.org, seanjc@google.com, pbonzini@redhat.com, dave.hansen@intel.com, dan.j.williams@intel.com, rafael.j.wysocki@intel.com, kirill.shutemov@linux.intel.com, ying.huang@intel.com, reinette.chatre@intel.com, len.brown@intel.com, tony.luck@intel.com, peterz@infradead.org, ak@linux.intel.com, isaku.yamahata@intel.com, chao.gao@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, bagasdotme@gmail.com, sagis@google.com, imammedo@redhat.com, kai.huang@intel.com Subject: [PATCH v7 08/20] x86/virt/tdx: Do logical-cpu scope TDX module initialization Date: Mon, 21 Nov 2022 13:26:30 +1300 Message-Id: <083f32ce0721611b7fc9297641cc8f5f222b937e.1668988357.git.kai.huang@intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org After the global module initialization, the next step is logical-cpu scope module initialization. Logical-cpu initialization requires calling TDH.SYS.LP.INIT on all BIOS-enabled CPUs. This SEAMCALL can run concurrently on all CPUs. Use the helper introduced for shutting down the module to do logical-cpu scope initialization. Signed-off-by: Kai Huang --- arch/x86/virt/vmx/tdx/tdx.c | 14 ++++++++++++++ arch/x86/virt/vmx/tdx/tdx.h | 1 + 2 files changed, 15 insertions(+) diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index f292292313bd..2cf7090667aa 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -199,6 +199,15 @@ static void seamcall_on_each_cpu(struct seamcall_ctx *sc) on_each_cpu(seamcall_smp_call_function, sc, true); } +static int tdx_module_init_cpus(void) +{ + struct seamcall_ctx sc = { .fn = TDH_SYS_LP_INIT }; + + seamcall_on_each_cpu(&sc); + + return atomic_read(&sc.err); +} + /* * Detect and initialize the TDX module. * @@ -218,6 +227,11 @@ static int init_tdx_module(void) if (ret) goto out; + /* Logical-cpu scope initialization */ + ret = tdx_module_init_cpus(); + if (ret) + goto out; + /* * Return -EINVAL until all steps of TDX module initialization * process are done. diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h index 0b415805c921..9ba11808bd45 100644 --- a/arch/x86/virt/vmx/tdx/tdx.h +++ b/arch/x86/virt/vmx/tdx/tdx.h @@ -16,6 +16,7 @@ * TDX module SEAMCALL leaf functions */ #define TDH_SYS_INIT 33 +#define TDH_SYS_LP_INIT 35 #define TDH_SYS_LP_SHUTDOWN 44 /*