Re: [PATCH 1/1] Remove flatview_simplify()

[Richard Henderson]

On 3/29/21 6:14 AM, FelixCuioc wrote:
> Flatview_simplify() can merge many small memory ranges
> into a large one and contains EHCI dma buffers.
> For example,the merged range maybe0xc0000-0xbfffffff.
> When seabios write PAM register to change the properties
> of part of the merged range from RW to readonly,
> this action cause the merged IOVA mapping will be
> unmapped.But EHCI device still send DMA cycles
> and then IOMMU blocks the DMA cycles of EHCI device.

You've described the problem, and it is quite obviously *not* in memory.c.


r~