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 . > > 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
