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From: Baoquan He <bhe@redhat.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: "Li, ZhenHua" <zhen-hual@hp.com>,
	Takao Indoh <indou.takao@jp.fujitsu.com>,
	dwmw2@infradead.org, vgoyal@redhat.com, dyoung@redhat.com,
	iommu@lists.linux-foundation.org, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
	alex.williamson@redhat.com, ddutile@redhat.com,
	ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com,
	doug.hatch@hp.com, jerry.hoemann@hp.com, tom.vaden@hp.com,
	li.zhang6@hp.com, lisa.mitchell@hp.com
Subject: Re: [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO
Date: Wed, 10 Dec 2014 16:46:52 +0800	[thread overview]
Message-ID: <20141210084652.GA25091@dhcp-16-105.nay.redhat.com> (raw)
In-Reply-To: <20141117133858.GA31920@8bytes.org>

Hi Joerg, ZhenHua,

This issue happens on AMD iommu too, do you have any plans or
thoughts on that?

Thanks
Baoquan

On 11/17/14 at 02:38pm, 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
> 

  parent reply	other threads:[~2014-12-10  8:49 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
2014-12-01 12:33                     ` Joerg Roedel
2014-12-10  8:46                   ` Baoquan He [this message]
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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