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Re: [Xen-devel] [PATCH v2 20/21] xen: support console_switching between Dom0 and DomUs on ARM

Hi Jan,

On 18/07/18 08:12, Jan Beulich wrote:
On 17.07.18 at 22:29, <julien.grall@xxxxxxx> wrote:
On 07/07/2018 00:12, Stefano Stabellini wrote:
Today Ctrl-AAA is used to switch between Xen and Dom0. Extend the
mechanism to allow for switching between Xen, Dom0, and any of the
initial DomU created from Xen alongside Dom0 out of information provided
via device tree.
It feels a bit painful for the user to switch N times to get his domain
console. Would it be possible to provide a new key binding where you
type the domain ID you want to switch to?

Does that mean you'd want to use 0-9 for this purpose? I'd be
very hesitant to accept such, as we're pretty tight with available
characters already. And of course 0-9 wouldn't scale to Dom10
and beyond. If you have something else in mind, I think it would
help if you spelled this out.

That what I had in mind. I agree that this solution would not scale to Dom10 and beyond. But that ring solution is not going to be any better.

Let's imagine you want to switch between domain 9 and 8. You would need to type CTRL-AAA N time before reaching the right console. N been the number of domain you have using the console.

It feels like, you want to provide a key for selecting the console (e.g 'c') and then type the domain ID you want to access. Can you read another key when in the keyhandler?


Julien Grall

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