On 7 October 2015 at 17:40, Mario Smarduch <m.smarduch@xxxxxxxxxxx> wrote: > On 10/7/2015 12:07 AM, Peter Maydell wrote: >> On 7 October 2015 at 01:32, Mario Smarduch <m.smarduch@xxxxxxxxxxx> wrote: >>> Hi Peter, >>> I noticed that icedcc, and 8250 don't work >>> with DEBUG_LL early debug print. And the kernel dies if >>> these are selected. Besides PL011 is there any other >>> serial devices that can be used for early debug with Virt MM? >>> Maybe some additional options are needed? >> >> PL011 and semihosting are the obvious choices for early >> debug output. There's no 8250 in the virt board so that >> definitely isn't going to work. We don't currently implement >> the ICE DCC channel, though I think Edgar was considering >> connecting it up to a chardev backend. >> >> Really though, I think the UART and semihosting should >> be enough for whatever the guest wants to do in the way >> of early debug. Why do you need more options? > No actually I was thinking of limiting choices to the ones that work for > Virt MM during kernel config. But thought that maybe others may be > supported through some options. Form me PL011 alone is enough. 8250 I think is what kvmtool uses, which is why that is a permitted option. Not sure who's implementing ICE DCC (though as I say QEMU might eventually). thanks -- PMM _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
