Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755189Ab2E2UqG (ORCPT ); Tue, 29 May 2012 16:46:06 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:45367 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751380Ab2E2UqE convert rfc822-to-8bit (ORCPT ); Tue, 29 May 2012 16:46:04 -0400 MIME-Version: 1.0 In-Reply-To: <4FC51D79.6010804@zytor.com> References: <1337754877-19759-1-git-send-email-yinghai@kernel.org> <1337754877-19759-3-git-send-email-yinghai@kernel.org> <20120525043651.GA1391@google.com> <20120525193716.GA8817@google.com> <4FC50E09.4000204@zytor.com> <4FC51D79.6010804@zytor.com> Date: Tue, 29 May 2012 13:46:03 -0700 X-Google-Sender-Auth: TtChtN3lQqPUcpjz1ZrQ9NMOuNE Message-ID: Subject: Re: [PATCH 02/11] PCI: Try to allocate mem64 above 4G at first From: Yinghai Lu To: "H. Peter Anvin" , David Miller , Tony Luck Cc: Bjorn Helgaas , Linus Torvalds , Steven Newbury , Andrew Morton , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1023 Lines: 30 On Tue, May 29, 2012 at 12:03 PM, H. Peter Anvin wrote: > On 05/29/2012 11:17 AM, Yinghai Lu wrote: >> >> pci bridge could support 16bits and 32bits io port. >> but we did not record if 32bits is supported. >> > > Okay, so this is the actual problem, no? their fw could not need kernel help to allocate io ports, or they are only use device that support 32bit ioport. > >> so during allocating, could have allocated above 64k address to non >> 32bit bridge. >> >> but ?x86 is ok, because ioport.end always set to 0xffff. >> other arches with IO_SPACE_LIMIT with 0xffffffff or >> 0xffffffffffffffffUL may have problem. > > The latter is nonsense, the PCI-side address space is only 32 bits wide. > maybe they have unified io include ioport and mem io? Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/