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c10f1e9c02570041a87756ed3e05c4d3803da493
after create 1:1 mapping, we can enable iommu at any time, because
whether the iommu is enable or not, the VOP can access the correct
phy addr.
dma_addr----->iommu module---->phy addr
| |
|---------bypass--------|
Change-Id: I50f6a897d90c33e5bd0fba099654ce788d3d647d
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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