Hi Antonios and all,
Recently, I want to test vfio on ARM and refer to this document
"http://www.virtualopensystems.com/en/solutions/guides/vfio-on-arm/"; .
Following is my test steps.
1. Get kernel src
git clone git://github.com/virtualopensystems/linux-kvm-arm.git
cd linux-kvm-arm
git checkout origin/vfio-platform-v4
2. Get kernel config
http://www.virtualopensystems.com/downloads/guides/kvm_on_arm/kernel-config >
.config
3. Make menuconfig the kernel
enable the KVM, SMMU and VFIO configuration options for the
host kernel
4. Compile the kernel
CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm make zImage
5. Build a device tree
There isn't rtsm_ve-cortex_a15x4_a7x4.dts in the directory
"arch/arm/boot/dts/".
So I download it from this git
"git://github.com/virtualopensystems/arm-dts.git".
./scripts/dtc/dtc -O dtb -o host-a15.dtb
../arm-dts/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
But the rtsm_ve-cortex_a15x4_a7x4.dts doesn't contain the DMA
or SMMU device.
6. Launch the model
Following is the boot_model.sh.
#!/bin/bash
MODEL_PATH='/root/ARM/FastModelsPortfolio_8.2/examples/FVP_VE/Build_Cortex-A15x4-A7x4-MMU400-DMA330/Linux64-Debug-GCC-4.4'
$MODEL_PATH/isim_system \
-a coretile.cluster0.*=/home/vfio/linux-system-semi.axf
\
-a coretile.cluster1.*=/home/vfio/linux-system-semi.axf
\
-C motherboard.smsc_91c111.enabled=1 \
-C motherboard.hostbridge.interfaceName="ARMroot" \
-C coretile.cluster0.cpu0.semihosting-enable=1 \
-C coretile.dmac0_int_base=64 \
-C coretile.dmac1_int_base=96 \
-C coretile.dmac2_int_base=128 \
-C coretile.dmac3_int_base=168 \
-C coretile.mmu400_dma330.dmac0.p_irq_nsecure="true" \
-C coretile.mmu400_dma330.dmac1.p_irq_nsecure="true" \
-C coretile.mmu400_dma330.dmac2.p_irq_nsecure="true" \
-C coretile.mmu400_dma330.dmac3.p_irq_nsecure="true" \
-C coretile.cluster0.cpu0.semihosting-cmd_line="\
--kernel /home/vfio/zImage \
--initrd /home/vfio/filesystem.cpio.gz \
--dtb host-a15.dtb -- earlyprintk console=ttyAMA0
mem=2048M "
It launched successfully. There is "vfio_platform" in the
directory, but I can't see any DMA decive in the directory "/sys/devices".
PS: I also try to enable the kernel configuration option for DMA. "DMA
Engine support --> DMA API Driver for PL330".
Is there something I'm wrong? Is there any way I can get the right
device tree and kernel config?
Look forward to your reply.
--
Shannon
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