From: David Woodhouse <dwmw2@infradead.org>
To: Jerome Glisse <jglisse@redhat.com>, Joerg Roedel <joro@8bytes.org>
Cc: ksummit-discuss@lists.linuxfoundation.org
Subject: Re: [Ksummit-discuss] [CORE TOPIC] Core Kernel support for Compute-Offload Devices
Date: Mon, 03 Aug 2015 19:51:02 +0100 [thread overview]
Message-ID: <1438627862.26511.366.camel@infradead.org> (raw)
In-Reply-To: <20150731163453.GB2039@redhat.com>
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On Fri, 2015-07-31 at 12:34 -0400, Jerome Glisse wrote:
> No the ASID should not be associated with mm_struct. There is to
> few ASID to have enough of them. I think currently there is only
> 8bits worth of ASID. So what happen is that the GPU device driver
> schedule process and recycle ASID as it does.
In PCIe we have 20 bits of PASID. And we are going to expect hardware
to implement them all, even if it can only do caching for fewer PASIDs
than that.
There is also an expectation that a given MM will have the *same* PASID
across all devices.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
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next prev parent reply other threads:[~2015-08-03 18:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-30 13:00 Joerg Roedel
2015-07-30 13:31 ` David Woodhouse
2015-07-30 13:54 ` Joerg Roedel
2015-07-31 16:34 ` Jerome Glisse
2015-08-03 18:51 ` David Woodhouse [this message]
2015-08-03 19:01 ` Jerome Glisse
2015-08-03 19:07 ` Andy Lutomirski
2015-08-03 19:56 ` Jerome Glisse
2015-08-03 21:10 ` Joerg Roedel
2015-08-03 21:12 ` David Woodhouse
2015-08-03 21:31 ` Joerg Roedel
2015-08-03 21:34 ` Jerome Glisse
2015-08-03 21:51 ` David Woodhouse
2015-08-04 18:11 ` Catalin Marinas
2015-08-03 22:10 ` Benjamin Herrenschmidt
2015-07-30 22:32 ` Benjamin Herrenschmidt
2015-08-01 16:10 ` Joerg Roedel
2015-07-31 14:52 ` Rik van Riel
2015-07-31 16:13 ` Jerome Glisse
2015-08-01 15:57 ` Joerg Roedel
2015-08-01 19:08 ` Jerome Glisse
2015-08-03 16:02 ` Joerg Roedel
2015-08-03 18:28 ` Jerome Glisse
2015-08-01 20:46 ` Arnd Bergmann
2015-08-03 16:10 ` Joerg Roedel
2015-08-03 19:23 ` Arnd Bergmann
2015-08-04 15:40 ` Christoph Lameter
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