From: "Jan Beulich" <jbeulich@novell.com>
To: yunhong.jiang@intel.com, konrad.wilk@oracle.com
Cc: xen-devel@lists.xensource.com
Subject: RE: granting access to MSI-X table and pending bit array
Date: Thu, 05 Aug 2010 18:44:28 +0100 [thread overview]
Message-ID: <4C5B068D0200007800061BF0@vpn.id2.novell.com> (raw)
>>> "Jiang, Yunhong" 07/15/10 10:24 AM >>>
>Will the small window for qemu exists still? QEMU may setup the mapping before the msix_capability_init().
Yes, I think so, as Dom0 still is permitted to map this area writable (revoking this requires a qemu fix to be committed at the same time, or a prerequisite fix to make qemu map this area read-only, which I think doesn't fit well within the MMIO model used there).
>BTW, I'm not sure if mapping as RO this will solve the sharing issue (i.e. the PBA or table entry share with other resource).
Not if the device meets the standard's requirement of these two tables being allowed to share a page between them, but not with any other resource.
Jan
next reply other threads:[~2010-08-05 17:44 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-05 17:44 Jan Beulich [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-07-07 10:14 granting access to MSI-X table and pending bit array Jan Beulich
2010-07-07 14:14 ` Konrad Rzeszutek Wilk
2010-07-07 14:31 ` Jan Beulich
2010-07-07 16:49 ` Stefano Stabellini
2010-07-09 9:54 ` Jan Beulich
2010-07-09 9:59 ` Keir Fraser
2010-07-12 9:55 ` Jan Beulich
2010-07-15 8:22 ` Jiang, Yunhong
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