Hi Eric, Thanks for your reply. There is no such directory "/sys/bus/platform/devices/2c0a0000.dma/driver/". On 2014/6/19 18:11, Eric Auger wrote: > On 06/19/2014 11:38 AM, Shannon Zhao wrote: >> Hi Bharat, >> >> On 2014/6/19 17:19, Bharat.Bhushan@xxxxxxxxxxxxx wrote: >>> >>> >>>> -----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" ? >> I refer to the url "http://www.virtualopensystems.com/en/solutions/guides/vfio-on-arm/";. >>> >>> >>>> 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 ? >> How to unbind "2c0a0000.dma" from its driver? >> I have tried following cmd to bind "2c0a0000.dma" with "vfio-playform" driver. >> echo 2c0a0000.dma > /sys/bus/platform/drivers/vfio-platform/vfio_bind >> But there is no /dev/vfio/0 or /dev/vfio/vfio . > > Hi Shannon, > > you may try following cmd to unbind the native dma driver > echo 2c0a0000.dma | sudo tee -a > /sys/bus/platform/devices/2c0a0000.dma/driver/unbind > > and then the following one to bing the meta-driver to the device > echo 2c0a0000.dma | sudo tee -a > /sys/bus/platform/drivers/vfio-platform/vfio_bind > > Best Regards > > Eric > >> >>> >>> 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 >>> >>> . >>> >> > > > . > -- Shannon _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
