From: Julien Grall <julien@xen.org>
To: Jan Beulich <jbeulich@suse.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
George Dunlap <george.dunlap@citrix.com>,
Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wl@xen.org>,
Henry Wang <Henry.Wang@arm.com>,
Michal Orzel <michal.orzel@amd.com>,
Manuel Bouyer <bouyer@antioche.eu.org>
Subject: Re: [PATCH] console: make input work again for pv-shim
Date: Wed, 18 Oct 2023 19:00:42 +0100 [thread overview]
Message-ID: <f2b51b47-fdeb-45a6-92c7-5b21da1855fe@xen.org> (raw)
In-Reply-To: <ed275abf-351f-5237-7e19-a3856f6d4272@suse.com>
Hi Jan,
On 18/10/2023 15:58, Jan Beulich wrote:
> From: Manuel Bouyer <bouyer@antioche.eu.org>
>
> The use of rcu_lock_domain_by_id() right in switch_serial_input() makes
> assumptions about domain IDs which don't hold when in shim mode: The
> sole (initial) domain there has a non-zero ID. Obtain the real domain ID
> in that case (generalized as get_initial_domain_id() returns zero when
> not in shim mode).
>
> Note that console_input_domain() isn't altered, for not being used when
> in shim mode (or more generally on x86).
I think it would be worth to either add a comment in
console_input_domain() and/or #ifdef the code. In any case...
>
> Fixes: c2581c58bec9 ("xen/console: skip switching serial input to non existing domains")
> Signed-off-by: Manuel Bouyer <bouyer@antioche.eu.org>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
...
Reviewed-by: Julien Grall <jgrall@amazon.com>
Also, should we consider it for xen 4.18? (I notice there is no for-4.18
tag).
Cheers,
--
Julien Grall
next prev parent reply other threads:[~2023-10-18 18:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-18 14:58 [PATCH] console: make input work again for pv-shim Jan Beulich
2023-10-18 18:00 ` Julien Grall [this message]
2023-10-19 0:29 ` Henry Wang
2023-10-19 6:35 ` Jan Beulich
2023-10-19 6:50 ` Henry Wang
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