linux-kernel - Re: [patch 4/4] vt-d: handle previous faults after enabling fault handling

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Message-ID: <20101201085252.GO10050@sequoia.sous-sol.org>
Date:	Wed, 1 Dec 2010 00:52:52 -0800
From:	Chris Wright <chrisw@...s-sol.org>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	linux-kernel@...r.kernel.org,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Max Asbock <masbock@...ux.vnet.ibm.com>,
	indou.takao@...fujitsu.com,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	David Woodhouse <dwmw2@...radead.org>, stable@...nel.org
Subject: Re: [patch 4/4] vt-d: handle previous faults after enabling fault
 handling

* Suresh Siddha (suresh.b.siddha@...el.com) wrote:
> Fault handling is getting enabled after enabling the interrupt-remapping (as
> the success of interrupt-remapping can affect the apic mode and hence the
> fault handling mode).
> 
> Hence there can potentially be some faults between the window of enabling
> interrupt-remapping in the vt-d and the fault-handling of the vt-d units.
> 
> Handle any previous faults after enabling the vt-d fault handling.
> 
> For v2.6.38 cleanup, need to check if we can remove the dmar_fault() in the
> enable_intr_remapping() and see if we can enable fault handling along with
> enabling intr-remapping.
> 
> Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>

Acked-by: Chris Wright <chrisw@...s-sol.org>
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