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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 8A8C7C4321D for ; Tue, 21 Aug 2018 15:19:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39B9C217BE for ; Tue, 21 Aug 2018 15:19:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 39B9C217BE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727741AbeHUSj7 (ORCPT ); Tue, 21 Aug 2018 14:39:59 -0400 Received: from mx2.suse.de ([195.135.220.15]:47148 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726743AbeHUSj6 (ORCPT ); Tue, 21 Aug 2018 14:39:58 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 48793ADE0; Tue, 21 Aug 2018 15:19:23 +0000 (UTC) Date: Tue, 21 Aug 2018 17:19:38 +0200 From: Borislav Petkov To: Brijesh Singh Cc: "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" , "Lendacky, Thomas" , Thomas Gleixner , Paolo Bonzini , Pavel Tatashin Subject: Re: SEV guest regression in 4.18 Message-ID: <20180821151938.GA31212@nazgul.tnic> References: <20ad6cd5-394c-d3ae-d99c-b656d7ef8293@amd.com> <20180821083911.GF24940@nazgul.tnic> <3d46f44c-dd78-8fa9-02ac-8206676ffde9@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <3d46f44c-dd78-8fa9-02ac-8206676ffde9@amd.com> User-Agent: Mutt/1.6.0 (2016-04-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 21, 2018 at 09:37:56AM -0500, Brijesh Singh wrote: > Those variables are accessed immediately by the tsc calibration code > path hence we will not able to delay the allocation. If you mean, check_tsc_sync_source/_target(), those are called pretty late, AFAICT. And I see a setup_arch() -> init_mem_mapping -> ... -> kernel_physical_mapping_init() call which happens much earlier. Again, AFAICT. You probably should try it though, to make sure. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --