> -----Original Message----- > From: kvmarm-bounces@xxxxxxxxxxxxxxxxxxxxx [mailto:kvmarm- > bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Shannon Zhao > Sent: Thursday, June 19, 2014 2:45 PM > To: Alvise Rigo; a.motakis@xxxxxxxxxxxxxxxxxxxxxx; iommu@lists.linux- > foundation.org; kvmarm@xxxxxxxxxxxxxxxxxxxxx > 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 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 > > _______________________________________________ > kvmarm mailing list > kvmarm@xxxxxxxxxxxxxxxxxxxxx > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
