>
>
>
> > -----Original Message-----
> > From: [email protected] [mailto:kvmarm-
> > [email protected]] On Behalf Of Shannon Zhao
> > Sent: Thursday, June 19, 2014 2:45 PM
> > To: Alvise Rigo; [email protected]; [email protected]
> > foundation.org; [email protected]
> > Subject: Re: Vfio-on-arm: the device tree does not contain the DMA
> > device
> >
> > Hi Alvise,
> >
> > Thanks for your reply.
> > I have apply the patch and could see the DMA devices.
> > But there is no vosys_dmatest int the directory "/sys/kernel/debug/"
> > after mounting debugfs.
> > I found that the branch vfio-platform-v4 doesn't contain the module
> > vosys_dmatest.
> > Then I port it from the branch pl330_dmatest and run vosys_dmatest
> successfully.
> >
> > echo 1 > /sys/kernel/debug/vosys_dmatest/start
> >
> > [ 6145.343419] dmaengine: __dma_request_channel: success (dma0chan0)
> > [ 6145.344000] vosys dmatest: callback: transfer completed
> > [ 6145.344147] vosys dmatest: tx completed
> > [ 6145.344589] vosys dmatest: source and destination match.
> >
> > Download the qemu and use following command to start a guest:
> > ./qemu-system-arm -enable-kvm -M vexpress-a15 -cpu cortex-a15 \
> > -device
> > pl330,vfio_group="/dev/vfio/0",vfio_device="2c0a0000.dma",\
> > vfio_container="/dev/vfio/vfio" \
> > -append "earlyprintk ip=dhcp console=ttyAMA0 rootwait" \
> > -kernel zImage -dtb guest.dtb -initrd filesystem.cpio.gz -
> > nographic An error reported:
> > qemu-system-arm: -device
> > pl330,vfio_group=/dev/vfio/0,vfio_device=2c0a0000.dma,:
>
> Why do we need to give "vfio_group=/dev/vfio/0" ?
>
>
> > could not open disk image vfio_container=/dev/vfio:
> > Could not open 'vfio_container=/dev/vfio': No such file or directory
Btw it should be looking for "/dev/vfio/vfio" and
/dev/vfio/<iommu_group-number>, no ?
Thanks
-Bharat
>
> Are you unbinding "2c0a0000.dma" from its driver and binding with "vfio-
> playform" driver ?
>
> Thanks
> -Bharat
>
> >
> > Is there something I'm wrong or do I miss some steps?
> >
> > Thank you,
> > Shannon
> >
> > On 2014/6/18 21:24, Alvise Rigo wrote:
> > > Hi Shannon,
> > >
> > > Thank you for reporting this issue, the device tree file was indeed
> > > missing.
> > > To solve the problem, you can apply the following patch to the
> > > repository you mentioned
> > > (git://github.com/virtualopensystems/arm-dts.git).
> > >
> > > For your information, soon we will update the guide with a newer
> > > version of VFIO with this issue fixed.
> > >
> > > Thank you,
> > > alvise
> > >
> > > ---
> > > fast_models/rtsm_ve-cortex_a15x4_a7x4.dts | 100
> > > +++++++++++++++++++++++++++++-
> > > 1 file changed, 97 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
> > > b/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
> > > index ef1275b..79c6af2 100644
> > > --- a/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
> > > +++ b/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
> > > @@ -142,7 +142,7 @@
> > > cpu7: cpu@7 {
> > > device_type = "cpu";
> > > compatible = "arm,cortex-a7";
> > > - reg = <0x104>;
> > > + reg = <0x103>;
> > > cluster = <&cluster1>;
> > > core = <&core7>;
> > > };
> > > @@ -159,7 +159,7 @@
> > > #address-cells = <0>;
> > > interrupt-controller;
> > > reg = <0 0x2c001000 0 0x1000>,
> > > - <0 0x2c002000 0 0x2000>,
> > > + <0 0x2c002000 0 0x1000>,
> > > <0 0x2c004000 0 0x2000>,
> > > <0 0x2c006000 0 0x2000>;
> > > interrupts = <1 9 0xf04>;
> > > @@ -183,6 +183,101 @@
> > > <1 10 0xf08>;
> > > };
> > >
> > > + smmu@2c0b0000 {
> > > + compatible = "arm,smmu-v2";
> > > + reg = <0x0 0x2c0b0000 0x0 0x10000>;
> > > + #global-interrupts = <2>;
> > > + interrupts = <0 58 4>,
> > > + <0 59 4>,
> > > + <0 60 4>,
> > > + <0 60 4>,
> > > + <0 60 4>,
> > > + <0 60 4>,
> > > + <0 60 4>,
> > > + <0 60 4>,
> > > + <0 60 4>;
> > > + mmu-masters = <&dma0 0x0 0x8>,
> > > + <&dma1 0x1 0x9>,
> > > + <&dma2 0x2 0xa>,
> > > + <&dma3 0x3 0xb>;
> > > + };
> > > +
> > > + dma0: dma@2c0a0000 {
> > > + compatible = "arm,pl330";
> > > + reg = <0 0x2c0a0000 0 0x1000>;
> > > + interrupts = <0 64 4>,
> > > + <0 65 4>,
> > > + <0 66 4>,
> > > + <0 67 4>,
> > > + <0 68 4>,
> > > + <0 69 4>,
> > > + <0 70 4>,
> > > + <0 71 4>;
> > > + #dma-cells = <1>;
> > > + #stream-id-cells = <2>;
> > > + clocks = <&oscclk6a>;
> > > + clock-names = "apb_pclk";
> > > + };
> > > +
> > > + dma1: dma@2c0a1000 {
> > > + compatible = "arm,pl330", "arm,primecell";
> > > + reg = <0 0x2c0a1000 0 0x1000>;
> > > + interrupts = <0 96 4>,
> > > + <0 97 4>,
> > > + <0 98 4>,
> > > + <0 99 4>,
> > > + <0 100 4>,
> > > + <0 101 4>,
> > > + <0 102 4>,
> > > + <0 103 4>;
> > > + #dma-cells = <1>;
> > > + #stream-id-cells = <2>;
> > > + clocks = <&oscclk6a>;
> > > + clock-names = "apb_pclk";
> > > + };
> > > +
> > > + dma2: dma@2c0a2000 {
> > > + compatible = "arm,pl330", "arm,primecell";
> > > + reg = <0 0x2c0a2000 0 0x1000>;
> > > + interrupts = <0 128 4>,
> > > + <0 129 4>,
> > > + <0 130 4>,
> > > + <0 131 4>,
> > > + <0 132 4>,
> > > + <0 133 4>,
> > > + <0 134 4>,
> > > + <0 135 4>;
> > > + #dma-cells = <1>;
> > > + #stream-id-cells = <2>;
> > > + clocks = <&oscclk6a>;
> > > + clock-names = "apb_pclk";
> > > + };
> > > +
> > > + dma3: dma@2c0a3000 {
> > > + compatible = "arm,pl330", "arm,primecell";
> > > + reg = <0 0x2c0a3000 0 0x1000>;
> > > + interrupts = <0 160 4>,
> > > + <0 161 4>,
> > > + <0 162 4>,
> > > + <0 163 4>,
> > > + <0 164 4>,
> > > + <0 165 4>,
> > > + <0 166 4>,
> > > + <0 167 4>;
> > > + #dma-cells = <1>;
> > > + #stream-id-cells = <2>;
> > > + clocks = <&oscclk6a>;
> > > + clock-names = "apb_pclk";
> > > + };
> > > +
> > > + oscclk6a: oscclk6a {
> > > + /* Reference 24MHz clock */
> > > + compatible = "fixed-clock";
> > > + #clock-cells = <0>;
> > > + clock-frequency = <24000000>;
> > > + clock-output-names = "oscclk6a";
> > > + };
> > > +
> > > smb {
> > > compatible = "simple-bus";
> > >
> > > @@ -244,4 +339,3 @@
> > > /include/ "rtsm_ve-motherboard.dtsi"
> > > };
> > > };
> > > -
> > >
> >
> > --
> > Shannon
> >
> > _______________________________________________
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> > [email protected]
> > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
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