crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes

Update the ARMv8 Crypto Extensions and the plain NEON AES implementations
in CBC and CTR modes to return the next IV back to the skcipher API client.
This is necessary for chaining to work correctly.

Note that for CTR, this is only done if the request is a round multiple of
the block size, since otherwise, chaining is impossible anyway.

Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

path: root/include/xen/features.h

/******************************************************************************
 * features.h
 *
 * Query the features reported by Xen.
 *
 * Copyright (c) 2006, Ian Campbell
 */

#ifndef __XEN_FEATURES_H__
#define __XEN_FEATURES_H__

#include <xen/interface/features.h>

void xen_setup_features(void);

extern u8 xen_features[XENFEAT_NR_SUBMAPS * 32];

static inline int xen_feature(int flag)
{
	return xen_features[flag];
}

#endif /* __ASM_XEN_FEATURES_H__ */