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=-12.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable 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 5AFE0C4332D for ; Thu, 4 Mar 2021 00:28:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 11A3764E62 for ; Thu, 4 Mar 2021 00:28:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350251AbhCDA1n (ORCPT ); Wed, 3 Mar 2021 19:27:43 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:51787 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235048AbhCCNdT (ORCPT ); Wed, 3 Mar 2021 08:33:19 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614778286; 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=dhKqxKBFkaOlQ3sPGBNWkfrkyTGxOiVdwNieGuR7XW0=; b=fk3h1b06/EKuxzUoKff+6cSZvXJ7F/SvujjJLBjkOvA58tYrYog7E58USlyUFkl5FA6lPN fb9zYcPDEHSvbROEVoP0/H7ymUPppZaQOuVQCHgYPxhA1A5N2eGVwxTH9KzBCILg98Io6N K5tUkKtesMPmSTrM18dUIQEtlDdczXw= 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-242-GknLCEs9PLKymz4cClIhpQ-1; Wed, 03 Mar 2021 08:31:25 -0500 X-MC-Unique: GknLCEs9PLKymz4cClIhpQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C7438800D53; Wed, 3 Mar 2021 13:31:23 +0000 (UTC) Received: from thuth.remote.csb (ovpn-115-146.ams2.redhat.com [10.36.115.146]) by smtp.corp.redhat.com (Postfix) with ESMTP id C7D085D9DD; Wed, 3 Mar 2021 13:31:14 +0000 (UTC) Subject: Re: [PATCH v1 1/2] s390x/kvm: Get rid of legacy_s390_alloc() To: David Hildenbrand , qemu-devel@nongnu.org Cc: kvm@vger.kernel.org, qemu-s390x@nongnu.org, Cornelia Huck , Paolo Bonzini , Richard Henderson , Halil Pasic , Christian Borntraeger , Igor Mammedov , Peter Xu References: <20210303130916.22553-1-david@redhat.com> <20210303130916.22553-2-david@redhat.com> From: Thomas Huth Message-ID: <93a30708-e893-208b-3dd3-c8b617272966@redhat.com> Date: Wed, 3 Mar 2021 14:31:13 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210303130916.22553-2-david@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 03/03/2021 14.09, David Hildenbrand wrote: > legacy_s390_alloc() was required for dealing with the absence of the ESOP > feature -- on old HW (< gen 10) and old z/VM versions (< 6.3). > > As z/VM v6.2 (and even v6.3) is no longer supported since 2017 [1] > and we don't expect to have real users on such old hardware, let's drop > legacy_s390_alloc(). > > Still check+report an error just in case someone still runs on > such old z/VM environments, or someone runs under weird nested KVM > setups (where we can manually disable ESOP via the CPU model). > > No need to check for KVM_CAP_GMAP - that should always be around on > kernels that also have KVM_CAP_DEVICE_CTRL (>= v3.15). Reviewed-by: Thomas Huth