On Thu, Nov 13, 2014 at 9:05 AM, Hongbo Zhang <hongbo.zhang@xxxxxxxxxx> wrote: > On 12 November 2014 17:57, Antonios Motakis > <a.motakis@xxxxxxxxxxxxxxxxxxxxxx> wrote: >> Hello Hongbo, >> >> On Wed, Nov 12, 2014 at 10:52 AM, Hongbo Zhang <hongbo.zhang@xxxxxxxxxx> wrote: >>> On 28 October 2014 02:07, Antonios Motakis >>> <a.motakis@xxxxxxxxxxxxxxxxxxxxxx> wrote: >>>> >>>> Enable building the VFIO PLATFORM driver that allows to use Linux platform >>>> devices with VFIO. >>>> >>>> Signed-off-by: Antonios Motakis <a.motakis@xxxxxxxxxxxxxxxxxxxxxx> >>>> --- >>>> 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. > In principle, if your target has a working IOMMU in front of a platform or AMBA device, then you should be able to use this. In practice, I have tested this on various fast models, and less extensively on Arndale in the past. Linaro as far as I know has tested this series on Calxeda devices with an xgmac NIC. > [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@xxxxxxxxxxxxxxx >>>> 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 kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
