linux-kernel - Re: [Xen-devel] xen/evtchn and forced threaded irq

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Message-ID: <def7a5d4-0eaf-f883-655a-5c089adbf9c9@suse.com>
Date:   Thu, 21 Feb 2019 09:52:25 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Julien Grall <julien.grall@...il.com>,
        Roger Pau Monné <roger.pau@...rix.com>
Cc:     Stefano Stabellini <sstabellini@...nel.org>,
        Andrew Cooper <Andrew.Cooper3@...rix.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Julien Grall <julien.grall@....com>,
        Jan Beulich <JBeulich@...e.com>,
        xen-devel <xen-devel@...ts.xenproject.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Dave P Martin <dave.martin@....com>
Subject: Re: [Xen-devel] xen/evtchn and forced threaded irq

On 21/02/2019 09:38, Julien Grall wrote:
> Hi Roger,
> 
> On Thu, 21 Feb 2019, 08:08 Roger Pau Monné, <roger.pau@...rix.com
> <mailto:roger.pau@...rix.com>> wrote:
> 
>     FWIW, you can also mask the interrupt while waiting for the thread to
>     execute the interrupt handler. Ie:
> 
> 
> Thank you for providing steps, however where would the masking be done?
> By the irqchip or a custom solution?

I'd go the irqchip route. This would be the least intrusive change
without the need for handling RT in a special way.


Juergen