Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752221AbbLVIf6 (ORCPT ); Tue, 22 Dec 2015 03:35:58 -0500 Received: from mail-lb0-f170.google.com ([209.85.217.170]:33329 "EHLO mail-lb0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751078AbbLVIfz (ORCPT ); Tue, 22 Dec 2015 03:35:55 -0500 Subject: Re: [PATCH V2 06/23] XEN / PCI: Remove the dependence on arch x86 when PCI_MMCONFIG=y To: Stefano Stabellini References: <1450278993-12664-1-git-send-email-tn@semihalf.com> <1450278993-12664-7-git-send-email-tn@semihalf.com> Cc: bhelgaas@google.com, arnd@arndb.de, will.deacon@arm.com, catalin.marinas@arm.com, rjw@rjwysocki.net, hanjun.guo@linaro.org, Lorenzo.Pieralisi@arm.com, okaya@codeaurora.org, jiang.liu@linux.intel.com, robert.richter@caviumnetworks.com, mw@semihalf.com, Liviu.Dudau@arm.com, ddaney@caviumnetworks.com, tglx@linutronix.de, wangyijing@huawei.com, Suravee.Suthikulpanit@amd.com, msalter@redhat.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org, jchandra@broadcom.com, jcm@redhat.com, Konrad Rzeszutek Wilk , Boris Ostrovsky From: Tomasz Nowicki Message-ID: <56790AF8.9080807@semihalf.com> Date: Tue, 22 Dec 2015 09:34:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1653 Lines: 37 On 21.12.2015 19:12, Stefano Stabellini wrote: > On Wed, 16 Dec 2015, Tomasz Nowicki wrote: >> In drivers/xen/pci.c, there are arch x86 dependent codes when >> CONFIG_PCI_MMCONFIG is enabled, since CONFIG_PCI_MMCONFIG >> depends on ACPI, so this will prevent XEN PCI running on other >> architectures using ACPI with PCI_MMCONFIG enabled (such as ARM64). >> >> Fortunatly, it can be sloved in a simple way. In drivers/xen/pci.c, >> the only x86 dependent code is if ((pci_probe & PCI_PROBE_MMCONF) == 0), >> and it's defined in asm/pci_x86.h, the code means that >> if the PCI resource is not probed in PCI_PROBE_MMCONF way, just >> ingnore the xen mcfg init. Actually this is duplicate, because >> if PCI resource is not probed in PCI_PROBE_MMCONF way, the >> pci_mmconfig_list will be empty, and the if (list_empty()) >> after it will do the same job. >> >> So just remove the arch related code and the head file, this >> will be no functional change for x86, and also makes xen/pci.c >> usable for other architectures. >> >> Signed-off-by: Hanjun Guo >> CC: Konrad Rzeszutek Wilk >> CC: Boris Ostrovsky >> Cc: Stefano Stabellini >> Tested-by: Suravee Suthikulpanit > > Acked-by: Stefano Stabellini > Thanks Stefano. Tomasz -- 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/