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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27FF1C433EF for ; Mon, 28 Feb 2022 23:37:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230382AbiB1Xh6 (ORCPT ); Mon, 28 Feb 2022 18:37:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229477AbiB1Xh4 (ORCPT ); Mon, 28 Feb 2022 18:37:56 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6697EE8680; Mon, 28 Feb 2022 15:37:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=MIME-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=fQU1wjdgDbSIFScDZRSB/pvHjSn/6iJan3w1IFwJqZA=; b=DHlkT6EJGDU4PjOJLlx0dUlpU0 b5eaSnXjmu2up9bWA/V0MHljVZh7Exty7pnZdIBMmEFATnBIDHrT7iM03IJbSLpKzOEt3B9UCRzKh ju1UDRZ9pJS56apcNyy6GV7r68U7jvh8gdlE1aInBW8MHATqurbfk/HhUH5rV+ouQlGqfQiUzVFlz Cx3tNUhpHQz+fVq/Dm0nWO8Dk9mue2WZGh7B6Lf+g//svXOZbX4KpkiSr7fa/I+gY8AmSwhLzhQM6 vYJR37VCkF/ZoY0vhEtPfL/w0WYiq7FKABzuXhFBor2xE7Y7GS82EgWzYXysdF0nUtoXQ1KRcdIE2 7oAwmdwA==; Received: from [2001:8b0:10b:1::3ae] (helo=u3832b3a9db3152.ant.amazon.com) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nOpZR-0091Ho-KK; Mon, 28 Feb 2022 23:36:50 +0000 Message-ID: Subject: Re: [PATCH v3 26/28] KVM: selftests: Split out helper to allocate guest mem via memfd From: David Woodhouse To: Sean Christopherson , Paolo Bonzini , Christian Borntraeger , Janosch Frank , Claudio Imbrenda Cc: Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , David Hildenbrand , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, David Matlack , Ben Gardon , Mingwei Zhang Date: Mon, 28 Feb 2022 23:36:48 +0000 In-Reply-To: <20220226001546.360188-27-seanjc@google.com> References: <20220226001546.360188-1-seanjc@google.com> <20220226001546.360188-27-seanjc@google.com> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-6EG54wMUL7LgC/zCw80V" User-Agent: Evolution 3.36.5-0ubuntu1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-6EG54wMUL7LgC/zCw80V Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2022-02-26 at 00:15 +0000, Sean Christopherson wrote: > Extract the code for allocating guest memory via memfd out of > vm_userspace_mem_region_add() and into a new helper, kvm_memfd_alloc(). > A future selftest to populate a guest with the maximum amount of guest > memory will abuse KVM's memslots to alias guest memory regions to a > single memfd-backed host region, i.e. needs to back a guest with memfd > memory without a 1:1 association between a memslot and a memfd instance. >=20 > No functional change intended. >=20 > Signed-off-by: Sean Christopherson While we're at it, please can we make the whole thing go away and just return failure #ifndef MFD_CLOEXEC, instead of breaking the build on older userspace? --=-6EG54wMUL7LgC/zCw80V Content-Type: 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