From: Ian Campbell <Ian.Campbell@citrix.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: julien.grall@citrix.com, xen-devel@lists.xensource.com,
David Vrabel <david.vrabel@citrix.com>
Subject: Re: [PATCH v2 3/4] xen/arm: introduce GNTTABOP_cache_flush
Date: Wed, 8 Oct 2014 13:17:30 +0100 [thread overview]
Message-ID: <1412770650.9247.27.camel@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1410081248250.17038@kaball.uk.xensource.com>
On Wed, 2014-10-08 at 12:54 +0100, Stefano Stabellini wrote:
> > Instead of this hypercall, could the guest clean/invalidate by set/way?
> > I guess this would need a suitable IPA which could be obtained by some
> > (offset) 1:1 mapping in the stage 2 tables?
>
> I wish I could: as the clean/invalidate by set/way is implementation
> specific, there is now way to use it to clean a specific range of
> addresses.
Clean by set/way is basically unusable except in very specific
circumstances (e.g. tearing down prior to a suspend). It's certainly not
usable on an active SMP system.
http://lists.xen.org/archives/html/xen-devel/2014-10/msg00709.html
Ian.
next prev parent reply other threads:[~2014-10-08 12:17 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-03 14:47 [PATCH v2 0/4] xen/arm: introduce GNTTABOP_cache_flush Stefano Stabellini
2014-10-03 14:50 ` [PATCH v2 1/4] xen/arm: introduce invalidate_xen_dcache_va_range Stefano Stabellini
2014-10-03 14:50 ` [PATCH v2 2/4] xen: introduce grant_map_exists Stefano Stabellini
2014-10-03 15:02 ` Andrew Cooper
2014-10-03 16:20 ` Stefano Stabellini
2014-10-06 8:22 ` Jan Beulich
2014-10-06 9:37 ` Stefano Stabellini
2014-10-06 10:20 ` Jan Beulich
2014-10-06 13:08 ` Stefano Stabellini
2014-10-06 13:39 ` Jan Beulich
2014-10-06 13:46 ` Stefano Stabellini
2014-10-06 14:01 ` Jan Beulich
2014-10-06 14:34 ` Stefano Stabellini
2014-10-06 14:56 ` Jan Beulich
2014-10-06 14:57 ` Stefano Stabellini
2014-10-06 15:09 ` Jan Beulich
2014-10-06 9:41 ` Stefano Stabellini
2014-10-06 10:17 ` Jan Beulich
2014-10-03 14:50 ` [PATCH v2 3/4] xen/arm: introduce GNTTABOP_cache_flush Stefano Stabellini
2014-10-03 14:53 ` Stefano Stabellini
2014-10-03 15:16 ` Andrew Cooper
2014-10-03 16:33 ` Stefano Stabellini
2014-10-03 16:37 ` Andrew Cooper
2014-10-03 16:37 ` Ian Campbell
2014-10-06 8:49 ` Jan Beulich
2014-10-06 9:00 ` Jan Beulich
2014-10-06 15:21 ` David Vrabel
2014-10-08 11:54 ` Stefano Stabellini
2014-10-08 12:06 ` David Vrabel
2014-10-08 12:52 ` Stefano Stabellini
2014-10-08 13:01 ` Ian Campbell
2014-10-08 12:17 ` Ian Campbell [this message]
2014-10-08 12:45 ` David Vrabel
2014-10-03 14:50 ` [PATCH v2 4/4] Revert "xen/arm: introduce XENFEAT_grant_map_identity" Stefano Stabellini
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