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=-13.8 required=3.0 tests=BAYES_00, 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 E8940C072B3 for ; Wed, 20 Jan 2021 10:25:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A8A9E23332 for ; Wed, 20 Jan 2021 10:25:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732226AbhATKRx convert rfc822-to-8bit (ORCPT ); Wed, 20 Jan 2021 05:17:53 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:24105 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731478AbhATJet (ORCPT ); Wed, 20 Jan 2021 04:34:49 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-136-FlUOqhZwNni2kAj9MZ8Nhg-1; Wed, 20 Jan 2021 09:33:01 +0000 X-MC-Unique: FlUOqhZwNni2kAj9MZ8Nhg-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Wed, 20 Jan 2021 09:33:00 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Wed, 20 Jan 2021 09:33:00 +0000 From: David Laight To: 'Christophe Leroy' , Benjamin Herrenschmidt , Paul Mackerras , "Michael Ellerman" CC: "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH 2/2] powerpc/44x: Remove STDBINUTILS kconfig option Thread-Topic: [PATCH 2/2] powerpc/44x: Remove STDBINUTILS kconfig option Thread-Index: AQHW7wFdZXRNi2FVUEGR2+8ye/HSkqowP30w Date: Wed, 20 Jan 2021 09:33:00 +0000 Message-ID: References: <2fed79b1154c872194f98bac4422c23918325e61.1611128938.git.christophe.leroy@csgroup.eu> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christophe Leroy > Sent: 20 January 2021 07:49 > > STDBINUTILS is just a toggle to allow 256k page size > to appear in the possible page sizes list for the 44x. > > Make 256k page size appear all the time with an > explicit warning on binutils, and remove this unneccessary > STDBINUTILS config option. > > Signed-off-by: Christophe Leroy > --- > arch/powerpc/Kconfig | 27 +++++++-------------------- > 1 file changed, 7 insertions(+), 20 deletions(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index a685e42d3993..3e29995540a7 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -720,18 +720,6 @@ config ARCH_MEMORY_PROBE > def_bool y > depends on MEMORY_HOTPLUG > > -config STDBINUTILS > - bool "Using standard binutils settings" > - depends on 44x > - default y > - help > - Turning this option off allows you to select 256KB PAGE_SIZE on 44x. > - Note, that kernel will be able to run only those applications, > - which had been compiled using binutils later than 2.17.50.0.3 with > - '-zmax-page-size' set to 256K (the default is 64K). Or, if using > - the older binutils, you can patch them with a trivial patch, which > - changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. > - > choice > prompt "Page size" > default PPC_4K_PAGES > @@ -771,17 +759,16 @@ config PPC_64K_PAGES > select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 > > config PPC_256K_PAGES > - bool "256k page size" > - depends on 44x && !STDBINUTILS && !PPC_47x > + bool "256k page size (Requires non-standard binutils settings)" > + depends on 44x && !PPC_47x > help > Make the page size 256k. > > - As the ELF standard only requires alignment to support page > - sizes up to 64k, you will need to compile all of your user > - space applications with a non-standard binutils settings > - (see the STDBINUTILS description for details). > - > - Say N unless you know what you are doing. > + That kernel will be able to run only those applications, > + which had been compiled using binutils later than 2.17.50.0.3 with > + '-zmax-page-size' set to 256K (the default is 64K). Or, if using > + the older binutils, you can patch them with a trivial patch, which > + changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. The kernel will only be able to run applications that have been compiled with '-zmax-page-size' set to 256K (the default is 64K) using binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000 in older versions. > > endchoice > > -- > 2.25.0 - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)