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=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 C88C7CA9EAF for ; Thu, 24 Oct 2019 12:13:50 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 82CF12166E for ; Thu, 24 Oct 2019 12:13:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="XFYiDn3P" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 82CF12166E 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 372836B0269; Thu, 24 Oct 2019 08:13:50 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 323C06B026A; Thu, 24 Oct 2019 08:13:50 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1C3146B026B; Thu, 24 Oct 2019 08:13:50 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0171.hostedemail.com [216.40.44.171]) by kanga.kvack.org (Postfix) with ESMTP id E690E6B0269 for ; Thu, 24 Oct 2019 08:13:49 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 926588249980 for ; Thu, 24 Oct 2019 12:13:49 +0000 (UTC) X-FDA: 76078569378.12.crow88_21594ee65da19 X-HE-Tag: crow88_21594ee65da19 X-Filterd-Recvd-Size: 6282 Received: from us-smtp-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Thu, 24 Oct 2019 12:13:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1571919228; 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=63dkq1rIK4xjp2ay2ZA3DSxT4H+7TMBFb0GQYgs1fjs=; b=XFYiDn3P02tZ5xgoY4Gy52zBgW2X2jvYqWjQoxGuddoDndG4j7Yy87s1AK5fckj4g8c7T8 bIrF/NiWadvbFrTBsGxEUIW4G7BRMpzDr6gWp9NiYIYaHtTHTXkmvc3QUKyvqWWj40p+nF 6RuEDnpvUXL4cooyj66rvoGt9jIpIrE= 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-12-cIgA3mrGO0GO4AgvS2Fldw-1; Thu, 24 Oct 2019 08:13:44 -0400 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 2AC001800D6B; Thu, 24 Oct 2019 12:13:39 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-141.ams2.redhat.com [10.36.116.141]) by smtp.corp.redhat.com (Postfix) with ESMTP id DEC7D1C93D; Thu, 24 Oct 2019 12:13:20 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, David Hildenbrand , Michal Hocko , Andrew Morton , kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, devel@driverdev.osuosl.org, xen-devel@lists.xenproject.org, x86@kernel.org, Alexander Duyck , Alexander Duyck , Alex Williamson , Allison Randal , Andy Lutomirski , "Aneesh Kumar K.V" , Anshuman Khandual , Anthony Yznaga , Benjamin Herrenschmidt , Borislav Petkov , Boris Ostrovsky , Christophe Leroy , Cornelia Huck , Dan Williams , Dave Hansen , Haiyang Zhang , "H. Peter Anvin" , Ingo Molnar , "Isaac J. Manjarres" , Jim Mattson , Joerg Roedel , Johannes Weiner , Juergen Gross , KarimAllah Ahmed , Kees Cook , "K. Y. Srinivasan" , "Matthew Wilcox (Oracle)" , Matt Sickler , Mel Gorman , Michael Ellerman , Michal Hocko , Mike Rapoport , Mike Rapoport , Nicholas Piggin , Oscar Salvador , Paolo Bonzini , Paul Mackerras , Paul Mackerras , Pavel Tatashin , Pavel Tatashin , Peter Zijlstra , Qian Cai , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Sasha Levin , Sean Christopherson , Stefano Stabellini , Stephen Hemminger , Thomas Gleixner , Vitaly Kuznetsov , Vlastimil Babka , Wanpeng Li , YueHaibing Subject: [PATCH v1 08/10] x86/mm: Prepare __ioremap_check_ram() for PG_reserved changes Date: Thu, 24 Oct 2019 14:09:36 +0200 Message-Id: <20191024120938.11237-9-david@redhat.com> In-Reply-To: <20191024120938.11237-1-david@redhat.com> References: <20191024120938.11237-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: cIgA3mrGO0GO4AgvS2Fldw-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=WINDOWS-1252 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: Right now, ZONE_DEVICE memory is always set PG_reserved. We want to change that. Rewrite __ioremap_check_ram() to make sure the function produces the same result once we stop setting ZONE_DEVICE pages PG_reserved. Cc: Dave Hansen Cc: Andy Lutomirski Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Signed-off-by: David Hildenbrand --- arch/x86/mm/ioremap.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index a39dcdb5ae34..db6913b48edf 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -77,10 +77,17 @@ static unsigned int __ioremap_check_ram(struct resource= *res) =09start_pfn =3D (res->start + PAGE_SIZE - 1) >> PAGE_SHIFT; =09stop_pfn =3D (res->end + 1) >> PAGE_SHIFT; =09if (stop_pfn > start_pfn) { -=09=09for (i =3D 0; i < (stop_pfn - start_pfn); ++i) -=09=09=09if (pfn_valid(start_pfn + i) && -=09=09=09 !PageReserved(pfn_to_page(start_pfn + i))) +=09=09for (i =3D 0; i < (stop_pfn - start_pfn); ++i) { +=09=09=09struct page *page; +=09=09=09 /* +=09=09=09 * We treat any pages that are not online (not managed +=09=09=09 * by the buddy) as not being RAM. This includes +=09=09=09 * ZONE_DEVICE pages. +=09=09=09 */ +=09=09=09page =3D pfn_to_online_page(start_pfn + i); +=09=09=09if (page && !PageReserved(page)) =09=09=09=09return IORES_MAP_SYSTEM_RAM; +=09=09} =09} =20 =09return 0; --=20 2.21.0