Pranavkumar Sawargaonkar pranavkumar@linaro.org writes:
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.
But implementing virtio inside a bootloader has already been done for coreboot, for example. A bootloader probably wants a virtio block device, so a console is trivial.
A single writable field for debugging makes sense. Anything more is far less certain.
Thanks, Rusty.