hvc_xen: make early_printk work with HVM guests

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Refactor the existing code in xen_raw_console_write to get the generic
early_printk console work with HVM guests.

Take the opportunity to replace the outb loop with a single outsb call
to reduce the number of vmexit.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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Stefano Stabellini 2016-02-25 12:10:39 +00:00

parent 5de738b3fb

commit a4d7b75be0

1 changed files with 16 additions and 11 deletions

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drivers/tty/hvc/hvc_xen.c

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