Yes, that is an old guide based on VFIO v4. We will update it soon. Regards, alvise
Il 19/06/2014 12:18, Eric Auger ha scritto: > On 06/19/2014 12:15 PM, [email protected] wrote: >> >> >>> -----Original Message----- >>> From: Eric Auger [mailto:[email protected]] >>> Sent: Thursday, June 19, 2014 3:41 PM >>> To: Shannon Zhao; Bhushan Bharat-R65777; Alvise Rigo; >>> [email protected]; [email protected]; >>> [email protected] >>> Subject: Re: Vfio-on-arm: the device tree does not contain the DMA device >>> >>> On 06/19/2014 11:38 AM, Shannon Zhao wrote: >>>> Hi Bharat, >>>> >>>> On 2014/6/19 17:19, [email protected] wrote: >>>>> >>>>> >>>>>> -----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" ? >>>> 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 >> >> Should not we use "driver-override" mechanism for binding with vfio-platform >> driver? >> >> Thanks >> -Bharat > > Hi Bharat, > > I guess Shannon is using an older version of the kernel. With > vfio-platform v4 this is the old unbind/bin mechanism that is in place, > if I am not wrong. > > Best Regards > > Eric >> >>> >>> 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 >>>>>> [email protected] >>>>>> https://lists.cs.columbia.edu/mailman/listinfo/kvmarm >>>>> >>>>> . >>>>> >>>> >> > _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
