Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753886AbaKMIFQ (ORCPT ); Thu, 13 Nov 2014 03:05:16 -0500 Received: from mail-vc0-f172.google.com ([209.85.220.172]:36671 "EHLO mail-vc0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751730AbaKMIFO (ORCPT ); Thu, 13 Nov 2014 03:05:14 -0500 MIME-Version: 1.0 In-Reply-To: References: <1414433284-31719-1-git-send-email-a.motakis@virtualopensystems.com> <1414433284-31719-4-git-send-email-a.motakis@virtualopensystems.com> Date: Thu, 13 Nov 2014 16:05:12 +0800 Message-ID: Subject: Re: [PATCH v9 03/19] vfio: platform: add the VFIO PLATFORM module to Kconfig From: Hongbo Zhang To: Antonios Motakis Cc: kvm-arm , Linux IOMMU , Alex Williamson , Will Deacon , VirtualOpenSystems Technical Team , Christoffer Dall , Eric Auger , Kim Phillips , Marc Zyngier , open list , "open list:VFIO DRIVER" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12 November 2014 17:57, Antonios Motakis wrote: > Hello Hongbo, > > On Wed, Nov 12, 2014 at 10:52 AM, Hongbo Zhang wrote: >> On 28 October 2014 02:07, Antonios Motakis >> wrote: >>> >>> Enable building the VFIO PLATFORM driver that allows to use Linux platform >>> devices with VFIO. >>> >>> Signed-off-by: Antonios Motakis >>> --- >>> drivers/vfio/Kconfig | 1 + >>> drivers/vfio/Makefile | 1 + >>> drivers/vfio/platform/Kconfig | 9 +++++++++ >>> drivers/vfio/platform/Makefile | 4 ++++ >>> 4 files changed, 15 insertions(+) >>> create mode 100644 drivers/vfio/platform/Kconfig >>> create mode 100644 drivers/vfio/platform/Makefile >>> >>> diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig >>> index a0abe04..962fb80 100644 >>> --- a/drivers/vfio/Kconfig >>> +++ b/drivers/vfio/Kconfig >>> @@ -27,3 +27,4 @@ menuconfig VFIO >>> If you don't know what to do here, say N. >>> >>> source "drivers/vfio/pci/Kconfig" >>> +source "drivers/vfio/platform/Kconfig" >>> diff --git a/drivers/vfio/Makefile b/drivers/vfio/Makefile >>> index 0b035b1..dadf0ca 100644 >>> --- a/drivers/vfio/Makefile >>> +++ b/drivers/vfio/Makefile >>> @@ -3,3 +3,4 @@ obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o >>> obj-$(CONFIG_VFIO_IOMMU_SPAPR_TCE) += vfio_iommu_spapr_tce.o >>> obj-$(CONFIG_VFIO_SPAPR_EEH) += vfio_spapr_eeh.o >>> obj-$(CONFIG_VFIO_PCI) += pci/ >>> +obj-$(CONFIG_VFIO_PLATFORM) += platform/ >>> diff --git a/drivers/vfio/platform/Kconfig b/drivers/vfio/platform/Kconfig >>> new file mode 100644 >>> index 0000000..c51af17 >>> --- /dev/null >>> +++ b/drivers/vfio/platform/Kconfig >>> @@ -0,0 +1,9 @@ >>> +config VFIO_PLATFORM >>> + tristate "VFIO support for platform devices" >>> + depends on VFIO && EVENTFD && ARM >> >> Hi Antonios, >> Is this only for ARM? how about X86 and PowerPC? >> On Freescale's PowerPC platform, the IOMMU is called PAMU (Peripheral >> Access Management Unit), and I am trying to use this VFIO framework on >> it. >> > > In principle it should be working on any platform with such devices; > as long as you have a VFIO IOMMU driver for the PAMU (on ARM we use > VFIO PLATFORM for the device, with VFIO IOMMU TYPE1 for the IOMMU). > Antonios, As far as you know, on which ARM platform can I apply your patches directly? My purpose is to apply you patches[1], and then implement a user space driver to evaluate the performance. [1] It is better without manually merging conflicts/dependencies etc, I am vfio-platform user, not a iommu expert. > So if you have a suitable IOMMU driver for your target, feel free to > test it, and let us know of the results. > >>> >>> + help >>> + Support for platform devices with VFIO. This is required to make >>> + use of platform devices present on the system using the VFIO >>> + framework. >>> + >>> + If you don't know what to do here, say N. >>> diff --git a/drivers/vfio/platform/Makefile b/drivers/vfio/platform/Makefile >>> new file mode 100644 >>> index 0000000..279862b >>> --- /dev/null >>> +++ b/drivers/vfio/platform/Makefile >>> @@ -0,0 +1,4 @@ >>> + >>> +vfio-platform-y := vfio_platform.o vfio_platform_common.o >>> + >>> +obj-$(CONFIG_VFIO_PLATFORM) += vfio-platform.o >>> -- >>> 2.1.1 >>> >>> -- >>> 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/ -- 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/