Hi , Thanks for the hints. I get better understanding to the kconfig tool now. I added "select TI_DMA" in my DSP kconfig file. It is done.
best regards, xiaolei ------------------ Original ------------------ From: "Philippe Mathieu-Daudé"<phi...@redhat.com>; Date: Fri, Jun 19, 2020 10:59 PM To: "casmac"<climber....@qq.com>;"qemu-devel"<qemu-devel@nongnu.org>; Subject: Re: how to build QEMU with the peripheral device modules Hi, On 6/19/20 3:24 PM, casmac wrote: > Hi All, >   I am trying to add a DMA peripheral module. In hw/dma directory, a > file ti_dma.c is added. >   Also, in hw/dma/kconfig, I added the following lines: > config TI_DMA > bool You need some device that 'selects' your device. You can select it by default: config TI_DMA bool default y You can enforce the selection on a target. For example to add it to all the ARM machines, in default-configs/arm-softmmu.mak add: CONFIG_TI_DMA=y The best is to only select it when required. For example if you need it on all machines using a TI OMAP SoC, then you'd select it in the OMAP section of hw/arm/Kconfig: config OMAP bool select FRAMEBUFFER select I2C select ECC select NAND select PFLASH_CFI01 select SD select SERIAL select TI_DMA You should have enough to adapt to your needs. Regards, Phil. >   In hw/dma/makefile.ojb, added one line: > common-obj-$(CONFIG_TI_DMA) += ti_dma.o >   However, ti_dma.c is not compiled as the QEMU project is built. Some > directories(eg. block, cpu...) under hw will be compiled though. >   The makefile.obj seems to show that the DMA module would be built > along with others: > devices-dirs-y = core/ > ifeq ($(CONFIG_SOFTMMU), y) > devices-dirs-$(call lor,$(CONFIG_VIRTIO_9P),$(call > land,$(CONFIG_VIRTFS),$(CONFIG_XEN))) += 9pfs/ > devices-dirs-y += acpi/ > devices-dirs-y += adc/ > devices-dirs-y += audio/ > devices-dirs-y += block/ > devices-dirs-y += bt/ > devices-dirs-y += char/ > devices-dirs-y += cpu/ > devices-dirs-y += display/ > devices-dirs-y += dma/ > devices-dirs-y += gpio/ > ...... >   I am not sure what is missing here. Any advise would be appreciated. > Thanks. > > xiaolei
