Re: [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO
From: Joerg Roedel
Date: Mon Nov 17 2014 - 08:39:07 EST
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 :)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/