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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BF906C7EE24 for ; Fri, 12 May 2023 11:40:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kWzg9sQmYh/6O5cTQsljAKmejZW8TNgDjFqwCcfT/0k=; b=ERtnpaF3KFk/a5 i5kG39SlTpNu5jNLD9znvOPUV1+55RZY1djum/CDPqq0r+COh+lYbM7213p0suMytDtFVl0HH1GTi LjwSLJ75FInJt/kLeZCTNKRPGtWkqvGE5Q9FVeS45D/id55WcYWnhBAhXcalPFGXPoZrufQh40Pmy WYZRMeh4r5OM5OA8rixLDyM/XZmSRl4PRj75QJpoNZTcBjAfMyFA6/qKfdn72sfO50hENRMJZqip+ 8lMUVXNcE4z073Hlz+W/7+0n8xUdry5eA2UE2vM/fbpAfYXjlNgY7EqI34oNSu459ul82AMQD5bIj fJB91lzGItLB305kv09g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pxR80-00BqIl-2A; Fri, 12 May 2023 11:40:04 +0000 Received: from irc.codon.org.uk ([2a00:1098:84:22e::2] helo=cavan.codon.org.uk) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pxR7x-00BqHw-2S for kexec@lists.infradead.org; Fri, 12 May 2023 11:40:02 +0000 Received: by cavan.codon.org.uk (Postfix, from userid 1000) id 1D9DF40A6F; Fri, 12 May 2023 12:40:00 +0100 (BST) Date: Fri, 12 May 2023 12:40:00 +0100 From: Matthew Garrett To: Ross Philipson Cc: linux-kernel@vger.kernel.org, x86@kernel.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org, iommu@lists.linux-foundation.org, kexec@lists.infradead.org, linux-efi@vger.kernel.org, dpsmith@apertussolutions.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, ardb@kernel.org, James.Bottomley@hansenpartnership.com, luto@amacapital.net, nivedita@alum.mit.edu, kanth.ghatraju@oracle.com, trenchboot-devel@googlegroups.com Subject: Re: [PATCH v6 11/14] reboot: Secure Launch SEXIT support on reboot paths Message-ID: <20230512114000.GG14461@srcf.ucam.org> References: <20230504145023.835096-1-ross.philipson@oracle.com> <20230504145023.835096-12-ross.philipson@oracle.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230504145023.835096-12-ross.philipson@oracle.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230512_044001_924557_66993808 X-CRM114-Status: GOOD ( 10.53 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Thu, May 04, 2023 at 02:50:20PM +0000, Ross Philipson wrote: > If the MLE kernel is being powered off, rebooted or halted, > then SEXIT must be called. Note that the SEXIT GETSEC leaf > can only be called after a machine_shutdown() has been done on > these paths. The machine_shutdown() is not called on a few paths > like when poweroff action does not have a poweroff callback (into > ACPI code) or when an emergency reset is done. In these cases, > just the TXT registers are finalized but SEXIT is skipped. What are the consequences of SEXIT not being called, and why is it ok to skip it in these circumstances? _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec