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 7EB00C4332F for ; Tue, 22 Nov 2022 19:14:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234514AbiKVTOm (ORCPT ); Tue, 22 Nov 2022 14:14:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234737AbiKVTOf (ORCPT ); Tue, 22 Nov 2022 14:14:35 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4BE118D481; Tue, 22 Nov 2022 11:14:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=oIW+mez/TFEcYehOEAG21RzQumZyO2HavfYb/Bz1UQw=; b=lzR3kl2UCxAuBYbI6TPTxCTPmT EMf/yFp1NbWNALLVOLdkkie9U2ANZW7evhz2eJDhYvxmSY3wtY2NbstsRgX90A4kTqJfqHp5nPYj4 TrvfblYjfgTCGTPwE7MG+voWZEuJpwPHW2FlFOUf/xiA/WC85XD0J3h3PEgwaITBTWaU9GcYaBoDV ZGUzJPUqp9ZAoiV1+mR5x8pMmQxyJIYCdkHPwTINApKngLvrdmp31bcFVj7km1x3MFCqqV3BxeOsy ym5BHgz0yQuVzAiafUHrzKnHN0NzuPtwII2f7hZqysFyyB+ziBgZ3acHRhzJABzq/9EiXpR3chCho sKN6e6/w==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1oxYis-003Yt6-Dn; Tue, 22 Nov 2022 19:14:22 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E0F5A300445; Tue, 22 Nov 2022 20:14:21 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id D1DDC20B64111; Tue, 22 Nov 2022 20:14:21 +0100 (CET) Date: Tue, 22 Nov 2022 20:14:21 +0100 From: Peter Zijlstra To: Dave Hansen Cc: Kai Huang , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, seanjc@google.com, pbonzini@redhat.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, 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 Subject: Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error Message-ID: References: <48505089b645019a734d85c2c29f3c8ae2dbd6bd.1668988357.git.kai.huang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 22, 2022 at 10:57:52AM -0800, Dave Hansen wrote: > To me, this starts to veer way too far into internal implementation details. > > Issue the TDH.SYS.LP.SHUTDOWN SEAMCALL on all BIOS-enabled CPUs > to shut down the TDX module. We really need to let go of the whole 'all BIOS-enabled CPUs' thing.