• Vasant Hegde's avatar
    powerpc/powernv: Code update interface · 50bd6153
    Vasant Hegde authored
    Code update interface for powernv platform. This provides
    sysfs interface to pass new image, validate, update and
    commit images.
    
    This patch includes:
      - Below OPAL APIs for code update
        - opal_validate_flash()
        - opal_manage_flash()
        - opal_update_flash()
    
      - Create below sysfs files under /sys/firmware/opal
        - image		: Interface to pass new FW image
        - validate_flash	: Validate candidate image
        - manage_flash	: Commit/Reject operations
        - update_flash	: Flash new candidate image
    
    Updating Image:
      "update_flash" is an interface to indicate flash new FW.
    It just passes image SG list to FW. Actual flashing is done
    during system reboot time.
    
    Note:
      - SG entry format:
        I have kept version number to keep this list similar to what
        PAPR is defined.
    Signed-off-by: default avatarVasant Hegde <hegdevasant@linux.vnet.ibm.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    50bd6153
opal-wrappers.S 5.11 KB