From: Ian Jackson <iwj@xenproject.org>
To: Julien Grall <julien@xen.org>
Cc: xen-devel@lists.xenproject.org, bertrand.marquis@arm.com,
Julien Grall <jgrall@amazon.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [PATCH for-4.15] xen/vgic: Implement write to ISPENDR in vGICv{2, 3}
Date: Mon, 22 Feb 2021 11:10:17 +0000 [thread overview]
Message-ID: <24627.37145.647801.601857@mariner.uk.xensource.com> (raw)
In-Reply-To: <20210220140412.31610-1-julien@xen.org>
Julien Grall writes ("[PATCH for-4.15] xen/vgic: Implement write to ISPENDR in vGICv{2, 3}"):
> From: Julien Grall <jgrall@amazon.com>
>
> Currently, Xen will send a data abort to a guest trying to write to the
> ISPENDR.
>
> Unfortunately, recent version of Linux (at least 5.9+) will start
> writing to the register if the interrupt needs to be re-triggered
> (see the callback irq_retrigger). This can happen when a driver (such as
> the xgbe network driver on AMD Seattle) re-enable an interrupt:
Release-Acked-by: Ian Jackson <iwj@xenproject.org>
next prev parent reply other threads:[~2021-02-22 11:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-20 14:04 [PATCH for-4.15] xen/vgic: Implement write to ISPENDR in vGICv{2, 3} Julien Grall
2021-02-22 11:10 ` Ian Jackson [this message]
2021-02-22 13:45 ` Bertrand Marquis
2021-02-23 1:24 ` Stefano Stabellini
2021-02-23 10:31 ` Julien Grall
2021-02-23 20:40 ` Stefano Stabellini
2021-02-25 12:22 ` Julien Grall
2021-02-25 21:27 ` Stefano Stabellini
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