lib/crypto/x86/nh.h

Source file repositories/reference/linux-study-clean/lib/crypto/x86/nh.h

File Facts

System
Linux kernel
Corpus path
lib/crypto/x86/nh.h
Extension
.h
Size
1250 bytes
Lines
46
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

irq_fpu_usable()) {
		kernel_fpu_begin();
		if (static_branch_likely(&have_avx2))
			nh_avx2(key, message, message_len, hash);
		else
			nh_sse2(key, message, message_len, hash);
		kernel_fpu_end();
		return true;
	}
	return false;
}

#define nh_mod_init_arch nh_mod_init_arch
static void nh_mod_init_arch(void)
{
	if (boot_cpu_has(X86_FEATURE_XMM2)) {
		static_branch_enable(&have_sse2);
		if (boot_cpu_has(X86_FEATURE_AVX2) &&
		    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
				      NULL))
			static_branch_enable(&have_avx2);
	}
}

Annotation

Implementation Notes