• Ohad Sharabi's avatar
    habanalabs: allow user to set allocation page size · f23f2802
    Ohad Sharabi authored
    In future ASICs the MMU will be able to work with multiple page sizes,
    thus a new flag is added to allow the user to set the requested page
    size.
    
    This flag is added since the whole DRAM is allocated for the user and
    the user also should be familiar with the memory usage use case.
    
    As such, the user may choose to "over allocate" memory in favor of
    performance (for instance- large page allocations covers more memory
    in less TLB entries).
    
    For example: say available page sizes are of 1MB and 32MB. If user
    wants to allocate 40MB the user can either set page size to 1MB and
    allocate the exact amount of memory (but will result in 40 TLB entries)
    or the user can use 32MB pages, "waste" 8MB of physical memory but
    occupy only 2 TLB entries.
    
    Note that this feature will be available only to ASIC that supports
    multiple DRAM page sizes.
    Signed-off-by: default avatarOhad Sharabi <osharabi@habana.ai>
    Reviewed-by: default avatarOded Gabbay <ogabbay@kernel.org>
    Signed-off-by: default avatarOded Gabbay <ogabbay@kernel.org>
    f23f2802
gaudi.c 276 KB