[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [RFC v2] ARM VM System Specification

Il 11/06/2014 08:54, Christoffer Dall ha scritto:
The problem is that the most common user problem with ARM VMs are that
they boot the thing, and then get no output.  So we wanted some way to
make sure we know that the kernel should be able to print to a console.

UEFI does provide DBG2 output, but that's only during boot time service
(so I'm told), and we need to mandate something that will work  when
the kernel boots.

Doh, indeed the console is not part of run-time services (so it's not even available for earlyprintk).

If kernels actually do use the UEFI runtime services and have no need
for direct access to an RTC when runing in a UEFI compliant system, then
I agree with not specifying the hardware details.

The RTC is not needed for ordinary operation of the kernel and, in the current kernel, the EFI RTC driver is only used for IA64. However, it seems to be platform independent. I'll give it a shot (on x86, since that's the only architecture for which I know how to get UEFI firmware).


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.