aesp10-ppc.S and ghashp10-ppc.S are autogenerated and not tracked by
git, so they should be ignored.  This is doing the same as the P8 files
in drivers/crypto/vmx/.gitignore but for the P10 files in
arch/powerpc/crypto.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230713042206.85669-1-ruscur@russell.cc

The recently added P10 AES/GCM code added some files containing
CRYPTOGAMS perl-asm code which are near duplicates of the p8 files
found in drivers/crypto/vmx.

In particular the newly added files produce functions with identical
names to the existing code.

When the kernel is built with CONFIG_CRYPTO_AES_GCM_P10=y and
CONFIG_CRYPTO_DEV_VMX_ENCRYPT=y that leads to link errors, eg:

  ld: drivers/crypto/vmx/aesp8-ppc.o: in function `aes_p8_set_encrypt_key':
  (.text+0xa0): multiple definition of `aes_p8_set_encrypt_key'; arch/powerpc/crypto/aesp8-ppc.o:(.text+0xa0): first defined here
  ...
  ld: drivers/crypto/vmx/ghashp8-ppc.o: in function `gcm_ghash_p8':
  (.text+0x140): multiple definition of `gcm_ghash_p8'; arch/powerpc/crypto/ghashp8-ppc.o:(.text+0x2e4): first defined here

Fix it for now by renaming the newly added files and functions to use
"p10" instead of "p8" in the names.

Fixes: 45a4672b9a6e ("crypto: p10-aes-gcm - Update Kconfig and Makefile")
Tested-by: Vishal Chourasia <vishalc@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230525150501.37081-1-mpe@ellerman.id.au

When VSX is disabled, eg. microwatt_defconfig, the build fails with:

  In function ‘enable_kernel_vsx’,
      inlined from ‘vsx_begin’ at arch/powerpc/crypto/aes-gcm-p10-glue.c:68:2,
      inlined from ‘p10_aes_gcm_crypt.constprop’ at arch/powerpc/crypto/aes-gcm-p10-glue.c:244:2:
  ...
  arch/powerpc/include/asm/switch_to.h:86:9: note: in expansion of macro ‘BUILD_BUG’
     86 |         BUILD_BUG();
        |         ^~~~~~~~~

Fix it by making the p10-aes-gcm code depend on VSX.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230515124731.122962-1-mpe%40ellerman.id.au

Move Power10 feature, PPC_MODULE_FEATURE_P10, definition to be in
arch/powerpc/include/asm/cpufeature.h.

Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Remove Power10 dependency in Kconfig and detect Power10 feature at runtime.

Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/algapi.h is included more than once.

Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Defined CRYPTO_AES_GCM_P10 in Kconfig to support AES/GCM
stitched implementation for Power10 or later CPU.

Added a new module driver aes-gcm-p10-crypto.

Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This perl code is taken from the OpenSSL project and added gcm_init_htable function
used in the aes-gcm-p10-glue.c code to initialize hash table.  gcm_hash_p8 is used
to hash encrypted data blocks.

Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This code is taken from CRYPTOGAMs[1].  The following functions are used,
aes_p8_set_encrypt_key is used to generate AES round keys and aes_p8_encrypt is used
to encrypt single block.

Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>