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    SubjectRe: [PATCH] xen: use hvc console for dom0
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    On 02/26/2018 06:08 AM, 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@suse.com>
    > ---
    > 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
    > 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);
    > +

    Won't this prevent dom0 output from showing up on vga console by default?

    -boris

    > #ifdef CONFIG_PCI
    > /* PCI BIOS service won't work from a PV guest. */
    > pci_probe &= ~PCI_PROBE_BIOS;

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