Re: [Xen-devel] [PATCH] xen: use hvc console for dom0

[Andrii Anisov <andrii_anisov@xxxxxxxx>]

Hello Juergen,


On 26.02.18 13:08, Juergen Gross wrote:
> Today the hvc console is added as a preferred console for pv domUs
> only. As this requires a boot parameter for getting dom0 messages per
> default add it for dom0, too.
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> ---
>   arch/x86/xen/enlighten_pv.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
Is this something x86 specific? Could it be a generic approach?

> index c047f42552e1..d27740a80c5e 100644
> --- a/arch/x86/xen/enlighten_pv.c
> +++ b/arch/x86/xen/enlighten_pv.c
> @@ -1377,7 +1377,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
>         if (!xen_initial_domain()) {
>                 add_preferred_console("xenboot", 0, NULL);
>                 add_preferred_console("tty", 0, NULL);
> -               add_preferred_console("hvc", 0, NULL);
>                 if (pci_xen)
>                         x86_init.pci.arch_init = pci_xen_init;
>         } else {
> @@ -1410,6 +1409,9 @@ asmlinkage __visible void __init xen_start_kernel(void)
>   
>   		xen_boot_params_init_edd();
>         }
> +
> +       add_preferred_console("hvc", 0, NULL);
> +
>   #ifdef CONFIG_PCI
>         /* PCI BIOS service won't work from a PV guest. */
>         pci_probe &= ~PCI_PROBE_BIOS;
--

*Andrii Anisov*



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