On 6 January 2014 22:37, Christopher Covington cov@codeaurora.org wrote:
Hi Ryan,
On 01/06/2014 05:27 PM, Ryan Harkin wrote:
On 6 January 2014 20:26, Peter Maydell <peter.maydell@linaro.org mailto:peter.maydell@linaro.org> wrote:
On 6 January 2014 19:46, Ryan Harkin <ryan.harkin@linaro.org <mailto:ryan.harkin@linaro.org>> wrote: > Hello, > > I'm trying to fire up an ARM fastmodel using a virtio block devicerather
> than the emulated MMC block device. > > UEFI is reading the kernel & DTB off the virtio device, so I knowthe device
> is present. > So far, I don't see any vda devices being enumerated (or any othervirtio
> messages) and it rootwaits for /dev/vda2. Stupid question: does the DTB you're passing to the kernel definitely have the virtio-mmio devices in it? (hopefully in the right locations).OMG, I think my brain has been in deep sleep. No, the DTB doesn't have virtio-mmio.
I'll try it again tomorrow, but I'm pretty sure that's it. Thanks!
While debugging it may be easier to specify the device with a kernel parameter than make device tree modifications.
virtio_mmio.device=1K@0x0130000:42
Thanks for your help, that's a nice tip. It didn't quite work however. The DT entry I added was slightly different:
+ virtio_block@0130000 { + compatible = "virtio,mmio"; + reg = <0x130000 0x1000>; + interrupts = <0x2a>; + };
But, it's working now, so thanks again to Peter for pointing out the obvious mistake.
Regards, Christopher
-- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation.