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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D41CC2B9F4 for ; Mon, 14 Jun 2021 12:33:14 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 33C336100A for ; Mon, 14 Jun 2021 12:33:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 33C336100A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id E3D8F83B4F; Mon, 14 Jun 2021 12:33:13 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MRUU-RpaphkR; Mon, 14 Jun 2021 12:33:13 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTPS id 7847583A43; Mon, 14 Jun 2021 12:33:12 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 53A52C000E; Mon, 14 Jun 2021 12:33:12 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2FA93C000B for ; Mon, 14 Jun 2021 12:33:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 29CF74049D for ; Mon, 14 Jun 2021 12:33:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wUay2wMPcTBP for ; Mon, 14 Jun 2021 12:33:09 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by smtp4.osuosl.org (Postfix) with ESMTPS id BCF8B40485 for ; Mon, 14 Jun 2021 12:33:09 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 05EE12DA; Mon, 14 Jun 2021 14:33:05 +0200 (CEST) Date: Mon, 14 Jun 2021 14:33:04 +0200 From: Joerg Roedel To: Eric Biederman , x86@kernel.org Subject: Re: [PATCH v2 0/2] x86: Disable kexec for SEV-ES guests Message-ID: References: <20210603132233.10004-1-joro@8bytes.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210603132233.10004-1-joro@8bytes.org> Cc: kvm@vger.kernel.org, Peter Zijlstra , Dave Hansen , virtualization@lists.linux-foundation.org, Arvind Sankar , hpa@zytor.com, Jiri Slaby , David Rientjes , Martin Radev , Tom Lendacky , Joerg Roedel , Kees Cook , Cfir Cohen , linux-coco@lists.linux.dev, Andy Lutomirski , Dan Williams , Juergen Gross , Mike Stunes , Sean Christopherson , linux-kernel@vger.kernel.org, Masami Hiramatsu , Erdem Aktas X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Gentle ping. On Thu, Jun 03, 2021 at 03:22:31PM +0200, Joerg Roedel wrote: > From: Joerg Roedel > > Changes v1->v2: > > - Rebased to v5.13-rc4 > - Add the check also to the kexec_file_load system call > > Original cover letter: > > Hi, > > two small patches to disable kexec on x86 when running as an SEV-ES > guest. Trying to kexec a new kernel would fail anyway because there is > no mechanism yet to hand over the APs from the old to the new kernel. > Supporting this needs changes in the Hypervisor and the guest kernel > as well. > > This code is currently being work on, but disable kexec in SEV-ES > guests until it is ready. > > Please review. > > Regards, > > Joerg > > Joerg Roedel (2): > kexec: Allow architecture code to opt-out at runtime > x86/kexec/64: Forbid kexec when running as an SEV-ES guest > > arch/x86/kernel/machine_kexec_64.c | 8 ++++++++ > include/linux/kexec.h | 1 + > kernel/kexec.c | 14 ++++++++++++++ > kernel/kexec_file.c | 9 +++++++++ > 4 files changed, 32 insertions(+) > > -- > 2.31.1 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization