petalinux 交叉编译指定内核驱动

需要编译 u-dma-buf 驱动。

This repository contains a Makefie.
Makefile has the following Parameters:

Parameter Name	Description	Default Value
ARCH	Architecture Name	$(shell uname -m | sed -e s/arm.*/arm/ -e s/aarch64.*/arm64/)
KERNEL_SRC	Kernel Source Directory	/lib/modules/$(shell uname -r)/build

Cross Compile

If you have a cross-compilation environment for target system, you can compile with:

shell$ make ARCH=arm KERNEL_SRC=/home/fpga/src/linux-5.10.120-zynqmp-fpga-generic all


实际使用时我们petalinux 工程对应的内核文件不在上述目录，需要修改。指定如下：

make ARCH=arm64 KERNEL_SRC=/home/xxx/petalinux/build/tmp/work/plnx_zynqmp-xilinx-linux/linux-xlnx/4.19-xilinx-v2019.1+gitAUTOINC+9811303824-r0/linux-plnx_zynqmp-standard-build/