lib/crypto/riscv/sha512.h

Source file repositories/reference/linux-study-clean/lib/crypto/riscv/sha512.h

File Facts

System
Linux kernel
Corpus path
lib/crypto/riscv/sha512.h
Extension
.h
Size
1136 bytes
Lines
40
Domain
Kernel Services
Bucket
lib
Inferred role
Kernel Services: implementation source
Status
source implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <asm/simd.h>
#include <asm/vector.h>

static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_extensions);

asmlinkage void sha512_transform_zvknhb_zvkb(struct sha512_block_state *state,
					     const u8 *data, size_t nblocks);

static void sha512_blocks(struct sha512_block_state *state,
			  const u8 *data, size_t nblocks)
{
	if (static_branch_likely(&have_extensions) && likely(may_use_simd())) {
		kernel_vector_begin();
		sha512_transform_zvknhb_zvkb(state, data, nblocks);
		kernel_vector_end();
	} else {
		sha512_blocks_generic(state, data, nblocks);
	}
}

#define sha512_mod_init_arch sha512_mod_init_arch
static void sha512_mod_init_arch(void)
{
	if (riscv_isa_extension_available(NULL, ZVKNHB) &&
	    riscv_isa_extension_available(NULL, ZVKB) &&
	    riscv_vector_vlen() >= 128)
		static_branch_enable(&have_extensions);
}

Annotation

Implementation Notes