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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 B90ABC4724C for ; Mon, 4 May 2020 19:03:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 784AD2073B for ; Mon, 4 May 2020 19:03:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QdYuwAE0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 784AD2073B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1AAFB8E0075; Mon, 4 May 2020 15:03:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 134988E0058; Mon, 4 May 2020 15:03:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F18D28E0075; Mon, 4 May 2020 15:03:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0088.hostedemail.com [216.40.44.88]) by kanga.kvack.org (Postfix) with ESMTP id CF9568E0058 for ; Mon, 4 May 2020 15:03:02 -0400 (EDT) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 9663C2C93 for ; Mon, 4 May 2020 19:03:02 +0000 (UTC) X-FDA: 76779959004.16.crook39_8eefe1e2e8845 X-HE-Tag: crook39_8eefe1e2e8845 X-Filterd-Recvd-Size: 3824 Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) by imf18.hostedemail.com (Postfix) with ESMTP for ; Mon, 4 May 2020 19:03:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588618981; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VWGsgsBT9IcIoK3tsJvtcUFAcT5JE1pgJJwKU1y5cyQ=; b=QdYuwAE0GIgtl85WfVl1UGjxQXso0hzjxhsZvklQ4UhPLw1eZKuocoDASu13urSlIYlPoT nOhX+qrLoA2VFndMcxYkrv4o3nR5meaPRyK2HKZHifDYA2wSCcBXfq4KpolMSjvbqLvP88 RrA7cAGxfNqRZ9xdyjxkumuT3bpOUo0= 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-479-n250Z6kGNcGSWT8ZWKcleg-1; Mon, 04 May 2020 15:02:57 -0400 X-MC-Unique: n250Z6kGNcGSWT8ZWKcleg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A6A87462; Mon, 4 May 2020 19:02:55 +0000 (UTC) Received: from t480s.redhat.com (ovpn-114-235.ams2.redhat.com [10.36.114.235]) by smtp.corp.redhat.com (Postfix) with ESMTP id 83BC4385; Mon, 4 May 2020 19:02:52 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-nvdimm@lists.01.org, kexec@lists.infradead.org, Vishal Verma , Dave Jiang , Pavel Tatashin , David Hildenbrand , Andrew Morton , Michal Hocko , Pankaj Gupta , Wei Yang , Baoquan He , Dave Hansen , Eric Biederman , Dan Williams Subject: [PATCH v3 2/3] kexec_file: Don't place kexec images on IORESOURCE_MEM_DRIVER_MANAGED Date: Mon, 4 May 2020 21:02:26 +0200 Message-Id: <20200504190227.18269-3-david@redhat.com> In-Reply-To: <20200504190227.18269-1-david@redhat.com> References: <20200504190227.18269-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Memory flagged with IORESOURCE_MEM_DRIVER_MANAGED is special - it won't b= e part of the initial memmap of the kexec kernel and not all memory might b= e accessible. Don't place any kexec images onto it. Cc: Andrew Morton Cc: Michal Hocko Cc: Pankaj Gupta Cc: Wei Yang Cc: Baoquan He Cc: Dave Hansen Cc: Eric Biederman Cc: Pavel Tatashin Cc: Dan Williams Signed-off-by: David Hildenbrand --- kernel/kexec_file.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index faa74d5f6941..bb05fd52de85 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -540,6 +540,11 @@ static int locate_mem_hole_callback(struct resource = *res, void *arg) unsigned long sz =3D end - start + 1; =20 /* Returning 0 will take to next memory range */ + + /* Don't use memory that will be detected and handled by a driver. */ + if (res->flags & IORESOURCE_MEM_DRIVER_MANAGED) + return 0; + if (sz < kbuf->memsz) return 0; =20 --=20 2.25.3