From: "Li, ZhenHua" <zhen-hual@hp.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: alex.williamson@redhat.com,
Takao Indoh <indou.takao@jp.fujitsu.com>,
bhe@redhat.com, tom.vaden@hp.com, dyoung@redhat.com,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
lisa.mitchell@hp.com, jerry.hoemann@hp.com,
iommu@lists.linux-foundation.org, ddutile@redhat.com,
doug.hatch@hp.com, ishii.hironobu@jp.fujitsu.com,
linux-pci@vger.kernel.org, bhelgaas@google.com, li.zhang6@hp.com,
dwmw2@infradead.org, vgoyal@redhat.com
Subject: Re: [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO
Date: Mon, 01 Dec 2014 14:31:38 +0800 [thread overview]
Message-ID: <547C0B4A.4060303@hp.com> (raw)
In-Reply-To: <20141117133858.GA31920@8bytes.org>
Joerg,
After I implement these two steps, there comes a new fault:
[1.594890] dmar: DRHD: handling fault status reg 2
[1.594894] dmar: INTR-REMAP: Request device [[41:00.0] fault index 4d
[1.594894] INTR-REMAP:[fault reason 34] Present field in the IRTE entry
is clear
It is caused by similar reason, so I will fix it like fixing the DMAR
faults: Do NOT disable and re-enable the interrupt remapping, try to
use data from old kernel.
Thanks
Zhenhua
On 11/17/2014 09:38 PM, Joerg Roedel wrote:
> On Fri, Nov 14, 2014 at 02:27:44PM +0800, Li, ZhenHua wrote:
>> I am working following your directions:
>>
>> 1. If the VT-d driver finds the IOMMU enabled, it reuses its root entry
>> table, and do NOT disable-enable iommu. Other data will be copied.
>>
>> 2. When a device driver issues the first dma_map command for a
>> device, we assign a new and empty page-table, thus removing all
>> mappings from the old kernel for the device.
>>
>> Please let me know if I get something wrong.
>
> Yes, this sounds right. Happily waiting for patches :)
>
>
> Joerg
>
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next prev parent reply other threads:[~2014-12-01 6:32 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-21 8:04 [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO Li, Zhen-Hua
2014-10-21 8:04 ` [PATCH 1/5] iommu/vt-d: Update iommu_attach_domain() and its callers Li, Zhen-Hua
2014-10-21 8:04 ` [PATCH 2/5] iommu/vt-d: Items required for kdump Li, Zhen-Hua
2014-10-21 8:04 ` [PATCH 3/5] iommu/vt-d: data types and functions used " Li, Zhen-Hua
2014-10-21 8:04 ` [PATCH 4/5] iommu/vt-d: Add domain-id functions Li, Zhen-Hua
2014-10-21 8:04 ` [PATCH 5/5] iommu/vt-d: enable kdump support in iommu module Li, Zhen-Hua
2014-10-22 10:05 ` [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO Baoquan He
2014-10-22 10:22 ` Li, Zhen-Hua
2014-10-22 10:27 ` Baoquan He
2014-10-27 7:29 ` Li, ZhenHua
2014-10-27 10:44 ` Baoquan He
2014-11-06 1:31 ` Takao Indoh
2014-11-06 1:35 ` Li, ZhenHua
2014-11-06 1:48 ` Takao Indoh
2014-11-06 2:11 ` Li, ZhenHua
2014-11-06 7:51 ` Takao Indoh
2014-11-06 8:06 ` Li, ZhenHua
2014-11-14 6:27 ` Li, ZhenHua
2014-11-17 13:38 ` Joerg Roedel
2014-12-01 6:31 ` Li, ZhenHua [this message]
2014-12-01 12:33 ` Joerg Roedel
2014-12-10 8:46 ` Baoquan He
2014-12-12 2:25 ` Li, ZhenHua
2014-12-12 16:11 ` Joerg Roedel
2014-12-15 9:13 ` Baoquan He
2014-12-15 9:16 ` Baoquan He
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