On Thu, 18 Apr 2013 09:30:52 +0100, Peter Maydell peter.maydell@linaro.org wrote:
On 18 April 2013 07:49, Marc Zyngier maz@misterjones.org wrote:
If you need an early console, why not simply wire the 8250 emulation in kvmtool to be useable from the MMIO bus? I reckon this would solve your problem in a more elegant way...
The other approach I thought of would be something involving defining a hypercall interface for console I/O, in the same way that we have hypercalls for "start cpu"/"stop cpu"/etc. Is there any mileage in considering that approach, or is it a non-starter?
That's always possible, but that becomes architecture dependent, which means code duplication across architectures. I'd rather use the MMIO infrastructure, which has some commonalities across the board.
M.