• Jérôme Glisse's avatar
    mm/device-public-memory: device memory cache coherent with CPU · df6ad698
    Jérôme Glisse authored
    Platform with advance system bus (like CAPI or CCIX) allow device memory
    to be accessible from CPU in a cache coherent fashion.  Add a new type of
    ZONE_DEVICE to represent such memory.  The use case are the same as for
    the un-addressable device memory but without all the corners cases.
    
    Link: http://lkml.kernel.org/r/20170817000548.32038-19-jglisse@redhat.comSigned-off-by: default avatarJérôme Glisse <jglisse@redhat.com>
    Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
    Cc: Balbir Singh <bsingharora@gmail.com>
    Cc: David Nellans <dnellans@nvidia.com>
    Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: John Hubbard <jhubbard@nvidia.com>
    Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Cc: Mark Hairgrove <mhairgrove@nvidia.com>
    Cc: Michal Hocko <mhocko@kernel.org>
    Cc: Sherry Cheung <SCheung@nvidia.com>
    Cc: Subhash Gutti <sgutti@nvidia.com>
    Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
    Cc: Bob Liu <liubo95@huawei.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    df6ad698
madvise.c 22.1 KB