Re: [PATCH v2 2/3] crypto: ccp - Introduce the AMD Secure Processor device

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On 6/28/2017 3:26 PM, Brijesh Singh wrote:


On 06/28/2017 02:53 PM, Tom Lendacky wrote:

In this I am leaving the top level config as-is and adding
CONFIG_CRYPTO_DEV_SP_CCP to enable the CCP device support inside the SP device driver.

[*] Support for AMD Secure Processor
<M>  Secure Processor device driver
<M>    Encryption and hashing offload support
-*-    Cryptographic Coprocessor device

I think the "Encryption and hashing offload support" should be indented
under "Cryptographic Coprocessor device" since it is a function of the
CCP and not the SP. Not sure if we can remove a level of menu somehow,
something to explore.

Good point, the updated Kconfig looks like this and let me know it works.

I think that looks better.

Thanks,
Tom


[*] Support for AMD Secure Processor
<M>   Secure Processor device driver
[*]     Cryptographic Coprocessor device
<M>       Encryption and hashing offload support

# cat drivers/crypto/ccp/Kconfig

config CRYPTO_DEV_CCP_DD
          tristate "Secure Processor device driver"
          default m
          help
            Provides AMD Secure Processor device driver.
            If you choose 'M' here, this module will be called ccp.

  config CRYPTO_DEV_SP_CCP
          bool "Cryptographic Coprocessor device"
          default y
          depends on CRYPTO_DEV_CCP_DD
          select HW_RANDOM
          select DMA_ENGINE
          select DMADEVICES
          select CRYPTO_SHA1
          select CRYPTO_SHA256
          help
Provides the support for AMD Cryptographic Coprocessor (CCP) device which can be used to offload encryption operations such as SHA, AES
            and more.

  config CRYPTO_DEV_CCP_CRYPTO
          tristate "Encryption and hashing offload support"
          default m
          depends on CRYPTO_DEV_CCP_DD
          depends on CRYPTO_DEV_SP_CCP
          select CRYPTO_HASH
          select CRYPTO_BLKCIPHER
          select CRYPTO_AUTHENC
          help
Support for using the cryptographic API with the AMD Cryptographic Coprocessor. This module supports offload of SHA and AES algorithms.
            If you choose 'M' here, this module will be called ccp_crypto.



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