0aaef4e7b0
[ Upstream commit fb5f50a43d9fd44fd6bc4f4dbcf9d3ec5b556558 ] For the case that VT-d page is smaller than mm page, converting dma pfn should be handled in two cases which are for start pfn and for end pfn. Currently the calculation of end dma pfn is incorrect and the result is less than real page frame number which is causing the mapping of iova always misses some page frames. Rename the mm_to_dma_pfn() to mm_to_dma_pfn_start() and add a new helper for converting end dma pfn named mm_to_dma_pfn_end(). Signed-off-by: Yanfei Xu <yanfei.xu@intel.com> Link: https://lore.kernel.org/r/20230625082046.979742-1-yanfei.xu@intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Stable-dep-of: 31000732d56b ("iommu/vt-d: Fix identity map bounds in si_domain_init()") Signed-off-by: Sasha Levin <sashal@kernel.org>
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.
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.