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xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU

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xenboot_write_console() is dealing with these quite fine so I don't see
why xenboot_console_setup() would return -ENOENT in this case.

Adjust documentation accordingly.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>

Link: https://lore.kernel.org/r/3d212583-700e-8b2d-727a-845ef33ac265@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Jan Beulich 2021-09-30 14:18:45 +02:00 committed by Juergen Gross
parent 8e24d9bfc4
commit 42bc9716bc
2 changed files with 2 additions and 4 deletions
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2
Documentation/admin-guide/kernel-parameters.txt
View File

@ -1255,7 +1255,7 @@
The VGA and EFI output is eventually overwritten by
the real console.
The xen output can only be used by Xen PV guests.
The xen option can only be used in Xen domains.
The sclp output can only be used on s390.

4
drivers/tty/hvc/hvc_xen.c
View File

@ -607,10 +607,8 @@ static int __init xenboot_console_setup(struct console *console, char *string)
{
static struct xencons_info xenboot;
if (xen_initial_domain())
if (xen_initial_domain() || !xen_pv_domain())
return 0;
if (!xen_pv_domain())
return -ENODEV;
return xencons_info_pv_init(&xenboot, 0);
}