linux-kernel - Re: [PATCH v9 03/19] vfio: platform: add the VFIO PLATFORM module to Kconfig

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Message-ID: <CAOhR-w305sv-_D3QNCtifkzODTv0XoPKBEs6C2MRT1fPVKjZ8A@mail.gmail.com>
Date:	Wed, 12 Nov 2014 18:38:58 +0800
From:	Hongbo Zhang <hongbo.zhang@...aro.org>
To:	"Bharat.Bhushan@...escale.com" <Bharat.Bhushan@...escale.com>
Cc:	Antonios Motakis <a.motakis@...tualopensystems.com>,
	"open list:VFIO DRIVER" <kvm@...r.kernel.org>,
	"will.deacon@....com" <will.deacon@....com>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>,
	open list <linux-kernel@...r.kernel.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"tech@...tualopensystems.com" <tech@...tualopensystems.com>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>
Subject: Re: [PATCH v9 03/19] vfio: platform: add the VFIO PLATFORM module to Kconfig

On 12 November 2014 18:05, Bharat.Bhushan@...escale.com
<Bharat.Bhushan@...escale.com> wrote:
> Hi,
>
>
>
> This is not yet supported on Freescale PowerPC. I am still in process of
> upstreaming the FSL PAMU specific patches for same.
>
> Initial plan is to test with PCIe devices and then with Platform devices.
>

I see there is already driver/iommu/fsl_pamu.c, doesn't it work?
Could you explain briefly what is wrong? I've heard that the vfio pci
works on powerpc platforms
Thanks.

>
>
> Thanks
>
> -Bharat
>
>
>
> From: kvmarm-bounces@...ts.cs.columbia.edu
> [mailto:kvmarm-bounces@...ts.cs.columbia.edu] On Behalf Of Hongbo Zhang
> Sent: Wednesday, November 12, 2014 3:08 PM
> To: Antonios Motakis
> Cc: open list:VFIO DRIVER; will.deacon@....com; alex.williamson@...hat.com;
> open list; iommu@...ts.linux-foundation.org; tech@...tualopensystems.com;
> kvmarm@...ts.cs.columbia.edu
> Subject: Re: [PATCH v9 03/19] vfio: platform: add the VFIO PLATFORM module
> to Kconfig
>
>
>
>
>
>
>
> On 28 October 2014 02:07, Antonios Motakis
> <a.motakis@...tualopensystems.com> wrote:
>
> Enable building the VFIO PLATFORM driver that allows to use Linux platform
> devices with VFIO.
>
> Signed-off-by: Antonios Motakis <a.motakis@...tualopensystems.com>
> ---
>  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-$(CONFIG_VFIO_PLATFORM) += platform/
> diff --git a/drivers/vfio/platform/Kconfig b/drivers/vfio/platform/Kconfig
> new file mode 100644
> index 0000000..c51af17
> --- /dev/null
> +++ b/drivers/vfio/platform/Kconfig
> @@ -0,0 +1,9 @@
> +config VFIO_PLATFORM
> +       tristate "VFIO support for platform devices"
> +       depends on VFIO && EVENTFD && ARM
>
>
>
> Hi Antonios,
>
> Is this only for ARM? how about X86 and PowerPC?
>
> On Freescale's PowerPC platform, the IOMMU is called PAMU (Peripheral Access
> Management Unit), and I am trying to use this VFIO framework on it.
>
>
>
> +       help
> +         Support for platform devices with VFIO. This is required to make
> +         use of platform devices present on the system using the VFIO
> +         framework.
> +
> +         If you don't know what to do here, say N.
> diff --git a/drivers/vfio/platform/Makefile b/drivers/vfio/platform/Makefile
> new file mode 100644
> index 0000000..279862b
> --- /dev/null
> +++ b/drivers/vfio/platform/Makefile
> @@ -0,0 +1,4 @@
> +
> +vfio-platform-y := vfio_platform.o vfio_platform_common.o
> +
> +obj-$(CONFIG_VFIO_PLATFORM) += vfio-platform.o
> --
> 2.1.1
>
> --
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