From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Jan Beulich <jbeulich@novell.com>
Cc: Yunhong Jiang <yunhong.jiang@intel.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH][RFC] Support S3 for MSI interrupt in latest kernel dom0
Date: Wed, 17 Dec 2008 15:06:49 +0000 [thread overview]
Message-ID: <C56EC609.20544%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <49491F2B.76E4.0078.0@novell.com>
On 17/12/2008 14:47, "Jan Beulich" <jbeulich@novell.com> wrote:
>> Could Xen remember the MSI state automatically, as it does for IO-APIC
>> presumably already? It knows what vectors are routed where at least, even if
>> dom0 has to reprogram the PCI device itself.
>
> That is what the map_guest_pirq() re-invocation is intended for - use the
> already known (stored) MSI state to re-setup the device accordingly
> (after all, msi_compose_msg() only depends on the vector information
> to be able to reconstruct address and data fields).
Why wait for map_guest_pirq() to be invoked to do this?
-- Keir
next prev parent reply other threads:[~2008-12-17 15:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-17 12:11 [PATCH][RFC] Support S3 for MSI interrupt in latest kernel dom0 Jiang, Yunhong
2008-12-17 12:27 ` Keir Fraser
2008-12-17 14:47 ` Jan Beulich
2008-12-17 15:06 ` Keir Fraser [this message]
2008-12-17 15:19 ` Jan Beulich
2008-12-17 15:22 ` Keir Fraser
2008-12-17 15:31 ` Jan Beulich
2008-12-17 15:53 ` Keir Fraser
2008-12-18 2:24 ` Jiang, Yunhong
2008-12-18 7:33 ` Jan Beulich
2008-12-19 10:10 ` Jiang, Yunhong
2008-12-19 10:29 ` Jan Beulich
2008-12-19 10:39 ` Jiang, Yunhong
2008-12-19 10:50 ` Jan Beulich
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