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 >
