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Re: [PATCH v3 2/5] xen: make evtchn_alloc_unbound public
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 31 Jan 2022 10:32:23 +0100
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- Cc: jgross@xxxxxxxx, Bertrand.Marquis@xxxxxxx, julien@xxxxxxx, Volodymyr_Babchuk@xxxxxxxx, Luca Miccio <lucmiccio@xxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 31 Jan 2022 09:32:34 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 28.01.2022 22:33, Stefano Stabellini wrote:
> From: Luca Miccio <lucmiccio@xxxxxxxxx>
>
> The xenstore event channel will be allocated for dom0less domains. It is
> necessary to have access to the evtchn_alloc_unbound function to do
> that, so make evtchn_alloc_unbound public.
>
> Add a skip_xsm parameter to allow disabling the XSM check in
> evtchn_alloc_unbound (xsm_evtchn_unbound wouldn't work for a call
> originated from Xen before running any domains.)
What I continue to be missing here are some words on why it is okay to
skip XSM checking in this case. After all an alternative would be to
put in place a suitable domain as "current" one for the check to actually
work.
Jan
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