# Re: \[PATCH 3/9\] xen/x86: make "earlyprintk=xen" work better for PVH Dom0

- From: Juergen Gross \<jgross@suse.com\>
- Date: 2021-09-23 14:06:04 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/09/1519604
- Thread: https://ratatoskr.run/xen-devel/2021/09/1499026/t.md

```text
On 07.09.21 12:09, Jan Beulich wrote:
> The xen_hvm_early_write() path better wouldn't be taken in this case;
> while port 0xE9 can be used, the hypercall path is quite a bit more
> efficient. Put that first, as it may also work for DomU-s (see also
> xen_raw_console_write()).
>
> While there also bail from the function when the first
> domU_write_console() failed - later ones aren't going to succeed.
>
> Signed-off-by: Jan Beulich <redacted>

Reviewed-by: Juergen Gross <jgross@suse.com>


Juergen
```

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