On 18 April 2013 12:21, Rusty Russell rusty@rustcorp.com.au wrote:
PranavkumarSawargaonkar pranavkumar@linaro.org writes:
From: Pranavkumar Sawargaonkar pranavkumar@linaro.org
This patch implements early printk support for virtio-mmio console devices without using any hypercalls.
This makes some sense, though not sure that early console *read* makes much sense. I can see the PCI version of this being useful as well.
Read can be useful for "mach-virt" which will have only virtio console as a console device. Then if someone wants to have UEFI or any other boot-loader emulation, which expects user to input few things, in that case read might become handy.
The spec definition for this will be interesting, because it can be used before the device is initialized (something which is generally verboten).
Cheers, Rusty.
Thanks, Pranav