Hi Bruce, On Aug 26, 2013, at 5:03 AM, Bruce Ashfield <[email protected]> wrote:
> On 13-08-25 3:09 PM, Elvis Dowson wrote: >> I noticed that you've committed the changes for qemuarma9 KMACHINE >> configuration to the linux-yocto kernel. >> >> http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto-3.8/tree/meta/cfg/kernel-cache/bsp?h=meta >> >> I adapted the qemuarm.conf configuration and booted it up, but nothing shows >> up in the QEMU window, I just get a black screen. >> >> Has qemu with the qemuarma9 configuration been successfully built and tested >> before? > > It has been, but not with a machine definition that is part of oe-core > or Yocto. > > It was contributed as the output from some cortexA9 testing, and I've > been carrying the kernel parts ever since. Can you share the qemucortexa9.conf machine definition please? > >> >> This is how my qemuarm.conf looks like, locally at the moment: >> >> #@TYPE: Machine >> #@NAME: qemuarmhf >> #@DESCRIPTION: Machine configuration for QEMU ARM Cortex A9 hard float. >> >> # Specify the default tune. >> DEFAULTTUNE = "armv7a-neon" >> >> require conf/machine/include/qemu.inc >> require conf/machine/include/tune-cortexa9.inc >> >> # Specify the machine name used by the kernel. >> KMACHINE_qemuarm = "qemuarma9" > > This is a default, so you don't need to set it. The default for qemuarm, as documented in http://www.yoctoproject.org/docs/1.5/ref-manual/ref-manual.html#var-KFEATURE_DESCRIPTION is arm_versatile926ejs. So I had to modify it to force it to use qemuarma9. > >> >> # Specify the kernel image type. >> KERNEL_IMAGETYPE = "zImage" > > I recall booting it with a uImage, but maybe my memory is failing. > >> >> # Specify the serial console parameters. >> SERIAL_CONSOLE = "115200 ttyAMA0" > > All of the above looks reasonably sane, but it's more about how you > launch qemu than the kernel build that is probably resulting in your > issues. What machine subtype did you use ? I used -M versatilepb. I also passed the -cpu cortex-a9 parameter to qemu. I just got a blank screen. FYI, I was able to get the qemuzynq machine working with the meta-xilinx layer, and in that, there was also a blank screen, but the QEMU output and login prompt came on the console from where the rumqemu qemuzynq command was run. A different type of behaviour from that of qemuarm running arm_versatile926ejs. The qemuzynq machine uses the linux-xlnx kernel. I'd like to get a generic qemuarma9 machine configuration working with linux-yocto, if possible, and add it to the standard list of qemu targets. Best regards, Elvis Dowson _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
