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    Subject[PATCHv5 5/7] fpga: of-fpga-region: add authenticate-fpga-config property
    Date
    From: Richard Gong <richard.gong@intel.com>

    Add authenticate-fpga-config property to support FPGA bitstream
    authentication, which makes sure a signed bitstream has valid signatures.

    Signed-off-by: Richard Gong <richard.gong@intel.com>
    ---
    v5: no change
    v4: add additional checks to make sure *only* authenticate
    v3: no change
    v2: changed in alphabetical order
    ---
    drivers/fpga/of-fpga-region.c | 24 +++++++++++++++++-------
    1 file changed, 17 insertions(+), 7 deletions(-)

    diff --git a/drivers/fpga/of-fpga-region.c b/drivers/fpga/of-fpga-region.c
    index e405309..5074479 100644
    --- a/drivers/fpga/of-fpga-region.c
    +++ b/drivers/fpga/of-fpga-region.c
    @@ -218,15 +218,25 @@ static struct fpga_image_info *of_fpga_region_parse_ov(

    info->overlay = overlay;

    - /* Read FPGA region properties from the overlay */
    - if (of_property_read_bool(overlay, "partial-fpga-config"))
    - info->flags |= FPGA_MGR_PARTIAL_RECONFIG;
    + /*
    + * Read FPGA region properties from the overlay.
    + *
    + * First check the integrity of the bitstream. If the
    + * authentication is passed, the user can perform other
    + * operations.
    + */
    + if (of_property_read_bool(overlay, "authenticate-fpga-config")) {
    + info->flags |= FPGA_MGR_BITSTREAM_AUTHENTICATE;
    + } else {
    + if (of_property_read_bool(overlay, "partial-fpga-config"))
    + info->flags |= FPGA_MGR_PARTIAL_RECONFIG;

    - if (of_property_read_bool(overlay, "external-fpga-config"))
    - info->flags |= FPGA_MGR_EXTERNAL_CONFIG;
    + if (of_property_read_bool(overlay, "external-fpga-config"))
    + info->flags |= FPGA_MGR_EXTERNAL_CONFIG;

    - if (of_property_read_bool(overlay, "encrypted-fpga-config"))
    - info->flags |= FPGA_MGR_ENCRYPTED_BITSTREAM;
    + if (of_property_read_bool(overlay, "encrypted-fpga-config"))
    + info->flags |= FPGA_MGR_ENCRYPTED_BITSTREAM;
    + }

    if (!of_property_read_string(overlay, "firmware-name",
    &firmware_name)) {
    --
    2.7.4
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