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From: Alex Williamson <alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: valmiki <valmikibow-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: tianyu.lan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	kevin.tian-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	jacob.jun.pan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
Subject: Re: Support SVM without PASID
Date: Sat, 8 Jul 2017 14:02:57 -0600	[thread overview]
Message-ID: <20170708140257.2de02d63@w520.home> (raw)
In-Reply-To: <a30962a6-2240-9263-96cc-10da1b179fcc-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

On Sat, 8 Jul 2017 22:33:01 +0530
valmiki <valmikibow-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> Hi,
> 
> In SMMUv3 architecture document i see "PASIDs are optional, 
> configurable, and of a size determined by the minimum
> of the endpoint".
> 
> So if PASID's are optional and not supported by PCIe end point, how SVM 
> can be achieved ?

It cannot be inferred from that statement that PASID support is not
required for SVM.  AIUI, SVM is a software feature enabled by numerous
"optional" hardware features, including PASID.  Features that are
optional per the hardware specification may be required for specific
software features.  Thanks,

Alex

  parent reply	other threads:[~2017-07-08 20:02 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-08 17:03 Support SVM without PASID valmiki
     [not found] ` <a30962a6-2240-9263-96cc-10da1b179fcc-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-07-08 20:02   ` Alex Williamson [this message]
2017-07-09  3:15     ` valmiki
2017-07-09  9:29       ` Liu, Yi L
2017-07-10  0:14       ` Bob Liu
2017-07-10 19:31       ` Jerome Glisse
     [not found]         ` <20170710193141.GA3813-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-07-12 16:23           ` valmiki
     [not found]       ` <73619426-6fcc-21ce-cfd4-8c66bde63f9a-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-07-11 10:56         ` Jean-Philippe Brucker
     [not found]           ` <eb132dfa-6708-5898-c2ce-ce7ab08809b1-5wv7dgnIgG8@public.gmane.org>
2017-07-12 16:27             ` valmiki
2017-07-12 16:48               ` Jean-Philippe Brucker
2017-07-22  2:05                 ` valmiki
     [not found]                   ` <41333a03-bf91-1152-4779-6579845609f6-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-08-01  8:26                     ` Jean-Philippe Brucker
     [not found]                       ` <564ba70b-db95-7fe0-86bb-bb4eefcd87ec-5wv7dgnIgG8@public.gmane.org>
2017-08-01 17:38                         ` valmiki
2017-08-01 18:40                           ` Jean-Philippe Brucker
2017-08-05  5:14                             ` valmiki
2017-08-07 10:31                               ` Jean-Philippe Brucker
2017-08-07 12:18                                 ` Bob Liu
2017-08-07 12:52                                   ` Jean-Philippe Brucker
2017-08-08  0:51                                     ` Bob Liu
2017-08-09 15:01                                       ` Jean-Philippe Brucker
2017-08-11  6:41                                     ` Tian, Kevin
     [not found]                                       ` <AADFC41AFE54684AB9EE6CBC0274A5D190D6EDB7-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2017-08-11  9:25                                         ` Jean-Philippe Brucker
2017-08-11  9:36                                       ` Bob Liu
2017-08-12 12:10                                 ` valmiki
2017-08-14  7:49                                   ` Tian, Kevin
2017-08-28 13:10                                     ` Bharat Kumar Gogada
2017-08-29  1:32                                       ` Tian, Kevin
2017-08-04  1:49                         ` Tian, Kevin
2017-08-04  9:42                           ` Jean-Philippe Brucker
2017-08-11  6:29                             ` Tian, Kevin
2017-08-11 16:25                             ` Raj, Ashok
2017-08-14  8:00                               ` Tian, Kevin
2017-08-14  9:07                                 ` Jean-Philippe Brucker

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