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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 31D02C76195 for ; Thu, 18 Jul 2019 08:44:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11E8E217F4 for ; Thu, 18 Jul 2019 08:44:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727527AbfGRIoS (ORCPT ); Thu, 18 Jul 2019 04:44:18 -0400 Received: from verein.lst.de ([213.95.11.211]:57873 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726649AbfGRIoS (ORCPT ); Thu, 18 Jul 2019 04:44:18 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id D492968B05; Thu, 18 Jul 2019 10:44:16 +0200 (CEST) Date: Thu, 18 Jul 2019 10:44:16 +0200 From: Christoph Hellwig To: Thiago Jung Bauermann Cc: x86@kernel.org, iommu@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Konrad Rzeszutek Wilk , Alexey Dobriyan , Thomas Lendacky , Halil Pasic , Mike Anderson , Ram Pai Subject: Re: [PATCH v3 5/6] fs/core/vmcore: Move sev_active() reference to x86 arch code Message-ID: <20190718084416.GD24562@lst.de> References: <20190718032858.28744-1-bauerman@linux.ibm.com> <20190718032858.28744-6-bauerman@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190718032858.28744-6-bauerman@linux.ibm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Thu, Jul 18, 2019 at 12:28:57AM -0300, Thiago Jung Bauermann wrote: > Secure Encrypted Virtualization is an x86-specific feature, so it shouldn't > appear in generic kernel code because it forces non-x86 architectures to > define the sev_active() function, which doesn't make a lot of sense. > > To solve this problem, add an x86 elfcorehdr_read() function to override > the generic weak implementation. To do that, it's necessary to make > read_from_oldmem() public so that it can be used outside of vmcore.c. > > Also, remove the export for sev_active() since it's only used in files that > won't be built as modules. I have to say I find the __weak overrides of the vmcore files very confusing and which we'd have a better scheme there. But as this fits into that scheme and allows to remove the AMD SME vs SEV knowledge from the core I'm fine with it. Reviewed-by: Christoph Hellwig