ossl: Move arm_arch.h to a common subdirectory

OpenSSL itself keeps only a single copy of this header. Do the same in
sys/crypto/openssl to avoid the extra maintenance burden. This requires
adjust

ossl: Move arm_arch.h to a common subdirectory

OpenSSL itself keeps only a single copy of this header. Do the same in
sys/crypto/openssl to avoid the extra maintenance burden. This requires
adjusting the include paths for generated asm files.

No functional change intended.

Reported by: jrtc27
Reviewed by: jhb
MFC after: 3 months
Differential Revision: https://reviews.freebsd.org/D42866

(cherry picked from commit e655cc70dfcda5cfedb5a1d9bef1e87d55519f64)

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ossl: Add AES-GCM support for NEON-enabled armv7

This provides substantially higher throughput than the fallback
implementation.

Reviewed by: jhb
MFC after: 3 months
Sponsored by: Klara, Inc.
Spons

ossl: Add AES-GCM support for NEON-enabled armv7

This provides substantially higher throughput than the fallback
implementation.

Reviewed by: jhb
MFC after: 3 months
Sponsored by: Klara, Inc.
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D41305

(cherry picked from commit 629a72376d51aad812d6f1279403bc81c38c35d2)

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ossl: Add support for armv7

OpenSSL provides implementations of several AES modes which use
bitslicing and can be accelerated on CPUs which support the NEON
extension. This patch adds arm platform

ossl: Add support for armv7

OpenSSL provides implementations of several AES modes which use
bitslicing and can be accelerated on CPUs which support the NEON
extension. This patch adds arm platform support to ossl(4) and provides
an AES-CBC implementation, though bsaes_cbc_encrypt() only implements
decryption. The real goal is to provide an accelerated AES-GCM
implementation; this will be added in a subsequent patch.

Initially derived from https://reviews.freebsd.org/D37420.

Reviewed by: jhb
Sponsored by: Klara, Inc.
Sponsored by: Stormshield
MFC after: 3 months
Differential Revision: https://reviews.freebsd.org/D41304

(cherry picked from commit 44f8e1e8530e1d2e95e84bbbe3d22ac9cb2557fe)

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