• Martin Schwidefsky's avatar
    s390/crypto: cleanup and move the header with the cpacf definitions · c7d4d259
    Martin Schwidefsky authored
    The CPACF instructions are going be used in KVM as well, move the
    defines and the inline functions from arch/s390/crypt/crypt_s390.h
    to arch/s390/include/asm. Rename the header to cpacf.h and replace
    the crypt_s390_xxx names with cpacf_xxx.
    
    While we are at it, cleanup the header as well. The encoding for
    the CPACF operations is odd, there is an enum for each of the CPACF
    instructions with the hardware function code in the lower 8 bits of
    each entry and a software defined number for the CPACF instruction
    in the upper 8 bits. Remove the superfluous software number and
    replace the enums with simple defines.
    
    The crypt_s390_func_available() function tests for the presence
    of a specific CPACF operations. The new name of the function is
    cpacf_query and it works slightly different than before. It gets
    passed an opcode of an CPACF instruction and a function code for
    this instruction. The facility_mask parameter is gone, the opcode
    is used to find the correct MSA facility bit to check if the CPACF
    instruction itself is available. If it is the query function of the
    given instruction is used to test if the requested CPACF operation
    is present.
    Acked-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    c7d4d259
sha256_s390.c 3.66 KB