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=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,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 03244C4332D for ; Fri, 15 Jan 2021 12:58:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF6D52313E for ; Fri, 15 Jan 2021 12:58:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732544AbhAOM6p (ORCPT ); Fri, 15 Jan 2021 07:58:45 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:34142 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387406AbhAOM57 (ORCPT ); Fri, 15 Jan 2021 07:57:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610715392; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NfzysKlTj5st1xcFMl1oLSiDESXibEg7nkCMhCh1EY4=; b=izoM86PY4pJbkBR/T3iEdQF0orj7tJ89dayqGCo083s/NBF//PZnqjh/CBE32l+ilsisvf zYqlw62A1Guqo0W4Y8iTXg47yujeAJqnjzc6xsI1sxdxRzvVoau9Wrk7O4XM/roGWJKRKp XdwtdX3gN2xX2c39iQv/avGMwAKsiHw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-172-i--ufkYEOuy-okm5AMtuvw-1; Fri, 15 Jan 2021 07:56:28 -0500 X-MC-Unique: i--ufkYEOuy-okm5AMtuvw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5763D100E437; Fri, 15 Jan 2021 12:56:26 +0000 (UTC) Received: from gondolin (ovpn-114-124.ams2.redhat.com [10.36.114.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0057960C6F; Fri, 15 Jan 2021 12:56:10 +0000 (UTC) Date: Fri, 15 Jan 2021 13:56:07 +0100 From: Cornelia Huck To: David Gibson Cc: brijesh.singh@amd.com, pair@us.ibm.com, dgilbert@redhat.com, pasic@linux.ibm.com, qemu-devel@nongnu.org, Richard Henderson , Marcelo Tosatti , David Hildenbrand , borntraeger@de.ibm.com, Marcel Apfelbaum , Paolo Bonzini , mst@redhat.com, jun.nakajima@intel.com, thuth@redhat.com, pragyansri.pathi@intel.com, kvm@vger.kernel.org, Eduardo Habkost , qemu-s390x@nongnu.org, qemu-ppc@nongnu.org, frankja@linux.ibm.com, Greg Kurz , mdroth@linux.vnet.ibm.com, berrange@redhat.com, andi.kleen@intel.com Subject: Re: [PATCH v7 04/13] confidential guest support: Move side effect out of machine_set_memory_encryption() Message-ID: <20210115135607.76003e1b.cohuck@redhat.com> In-Reply-To: <20210113235811.1909610-5-david@gibson.dropbear.id.au> References: <20210113235811.1909610-1-david@gibson.dropbear.id.au> <20210113235811.1909610-5-david@gibson.dropbear.id.au> Organization: Red Hat GmbH MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, 14 Jan 2021 10:58:02 +1100 David Gibson wrote: > When the "memory-encryption" property is set, we also disable KSM > merging for the guest, since it won't accomplish anything. > > We want that, but doing it in the property set function itself is > thereoretically incorrect, in the unlikely event of some configuration > environment that set the property then cleared it again before > constructing the guest. > > More importantly, it makes some other cleanups we want more difficult. > So, instead move this logic to machine_run_board_init() conditional on > the final value of the property. > > Signed-off-by: David Gibson > Reviewed-by: Richard Henderson > Reviewed-by: Greg Kurz > --- > hw/core/machine.c | 17 +++++++++-------- > 1 file changed, 9 insertions(+), 8 deletions(-) Reviewed-by: Cornelia Huck