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    SubjectRe: [PATCH v2] drivers: misc: Add support for nCipher HSM devices
    On Fri, Dec 20, 2019 at 03:47:38PM +0000, Dave Kim wrote:
    > From: David Kim <david.kim@ncipher.com>
    >
    > This is the driver for nCipher’s Solo and Solo XC hardware security modules.
    > These modules implement a proprietary command set (the ’nCore API’) to
    > perform cryptographic operations - key generation, signature, and so on. HSM
    > commands and their replies are passed in a serialised binary format over the
    > PCIe bus via a shared memory region. Multiple commands may be in-flight at
    > any one time - command processing is multi-threaded and asynchronous. A write
    > operation may, therefore, deliver multiple commands, and multiple replies may
    > be retrieved in one read operation.

    If this is "just" a crypto accelerator, why isn't this driver using the
    existing in-kernel hardware crypto api? What is lacking from it that
    you need here?

    thanks,

    greg k-h

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