Hi Geoff, On 20/10/2015:10:04:54 AM, Geoff Levand wrote: > Hi, > > On Tue, 2015-10-20 at 08:11 +0530, Pratyush Anand wrote: > > On 19/10/2015:03:29:55 PM, Geoff Levand wrote: > > I tested this on the foundation model and it hangs. > > > > Thanks for testing it. > > > > Which uart model has been used in foundation model? > > I only tested it, but did not look into it. The > documentation should be on the ARM developer's site. Line status register offset for pl011(which is in foundation model) and 8250 based uart are not same. I think, in that case we should keep separate argument for lsr. Can you please try patch[1] and let me know your feedback. If you are using UART0 of foundation model, then you would be passing --port=0x1C090000. With patch[1], you may pass one more argument --port-lsr=0x1C090018,0x80. Even if --port-lsr is not passed to kexec() system call, it will not hang. However, one may not see all the printed character without --port-lsr. ~Pratyush [1] https://github.com/pratyushanand/kexec-tools/commit/57344a8516447cefabc2372daf9a6b0b04bd9851
