On 2016-12-27 18:59, Ralf Ramsauer wrote:
> e1bda8b1d47da ("core: Add hypercall to write to debug console)
> introduced debug output for inmates through the hypervisor via
> hypercalls.
>
> Add corresponding documentation by shamelessly copying text from the
> commit message.
>
> Signed-off-by: Ralf Ramsauer <[email protected]>
> ---
> Documentation/debug-output.md | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/debug-output.md b/Documentation/debug-output.md
> index 8a1ab09681..d68ed5cb35 100644
> --- a/Documentation/debug-output.md
> +++ b/Documentation/debug-output.md
> @@ -103,7 +103,12 @@ their output driver according to their settings in
> mach/debug.h.
> | con-clock_reg | Clock Register | | |
> | con-gate_nr | Clock Gate Nr | | |
>
> -All architectures support the empty con-type "none".
> +All architectures support the empty con-type "none" and "JAILHOUSE". The
> +"JAILHOUSE" console type uses the hypervisor's debug output via hypercalls.
> +Only invocations from cells which have the explicit permission via the
> +configuration flag JAILHOUSE_CELL_DEBUG_CONSOLE are executed. The default
> +remains off, and the administrator is expected to grant this permission only
> +temporarily while debugging a specific cell.
>
> Similar to the hypervisor configuration, a zero value for con-divider will
> skip
> initialisation of the UART interface.
>
Thanks, queued.
Jan
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