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

[Andrii Anisov]

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*