Messages in this thread | | | Date | Mon, 17 Nov 2014 14:38:59 +0100 | From | Joerg Roedel <> | Subject | Re: [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO |
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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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