mm/hmm: mirror hugetlbfs (snapshoting, faulting and DMA mapping)
HMM mirror is a device driver helpers to mirror range of virtual address. It means that the process jobs running on the device can access the same virtual address as the CPU threads of that process. This patch adds support for hugetlbfs mapping (ie range of virtual address that are mmap of a hugetlbfs). [rcampbell@nvidia.com: fix initial PFN for hugetlbfs pages] Link: http://lkml.kernel.org/r/20190419233536.8080-1-rcampbell@nvidia.com Link: http://lkml.kernel.org/r/20190403193318.16478-9-jglisse@redhat.com Signed-off-by:Jérôme Glisse <jglisse@redhat.com> Signed-off-by:
Ralph Campbell <rcampbell@nvidia.com> Reviewed-by:
Ralph Campbell <rcampbell@nvidia.com> Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Souptick Joarder <jrdr.linux@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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023a019a
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