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From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Subject: Re: [PATCH v2 13/40] vfio: Add support for Shared Virtual Addressing
To: Xu Zaibo <xuzaibo@huawei.com>,
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References: <20180511190641.23008-1-jean-philippe.brucker@arm.com>
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Message-ID: <3a961aff-e830-64bb-b6a9-14e08de1abf5@arm.com>
Date: Mon, 3 Sep 2018 11:34:29 +0100
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On 01/09/18 03:23, Xu Zaibo wrote:
> As one application takes a whole function while using VFIO-PCI, why do 
> the application and the
> function need to enable PASID capability? (Since just one I/O page table 
> is enough for them.)

At the moment the series doesn't provide support for SVA without PASID
(on the I/O page fault path, 08/40). In addition the BIND ioctl could be
used by the owner application to bind other processes (slaves) and
perform sub-assignment. But that feature is incomplete because we don't
send stop_pasid notification to the owner when a slave dies.

Thanks,
Jean