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

From: Andrii Anisov
Date: Mon Feb 26 2018 - 07:06:33 EST


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*