linux-kernel - Re: [PATCH v11 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

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Message-ID: <20150512061852.GA10229@dhcp-16-116.nay.redhat.com>
Date:	Tue, 12 May 2015 14:18:52 +0800
From:	Baoquan He <bhe@...hat.com>
To:	"Li, Zhen-Hua" <zhen-hual@...com>
Cc:	dwmw2@...radead.org, indou.takao@...fujitsu.com, joro@...tes.org,
	vgoyal@...hat.com, dyoung@...hat.com,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, kexec@...ts.infradead.org,
	alex.williamson@...hat.com, ddutile@...hat.com,
	ishii.hironobu@...fujitsu.com, bhelgaas@...gle.com,
	doug.hatch@...com, jerry.hoemann@...com, tom.vaden@...com,
	li.zhang6@...com, lisa.mitchell@...com, billsumnerlinux@...il.com,
	rwright@...com
Subject: Re: [PATCH v11 0/10] iommu/vt-d: Fix intel vt-d faults in kdump
 kernel

On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
> This patchset is an update of Bill Sumner's patchset, implements a fix for:
> If a kernel boots with intel_iommu=on on a system that supports intel vt-d, 
> when a panic happens, the kdump kernel will boot with these faults:

Test passed on my local workstation. Thanks, Zhenhua.

> 
>     dmar: DRHD: handling fault status reg 102
>     dmar: DMAR:[DMA Read] Request device [01:00.0] fault addr fff80000
>     DMAR:[fault reason 01] Present bit in root entry is clear
> 
>     dmar: DRHD: handling fault status reg 2
>     dmar: INTR-REMAP: Request device [[61:00.0] fault index 42
>     INTR-REMAP:[fault reason 34] Present field in the IRTE entry is clear
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