arch/arm64/kvm/trng.c

Source file repositories/reference/linux-study-clean/arch/arm64/kvm/trng.c

File Facts

System
Linux kernel
Corpus path
arch/arm64/kvm/trng.c
Extension
.c
Size
2256 bytes
Lines
86
Domain
Architecture Layer
Bucket
arch/arm64
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (smccc_get_arg1(vcpu)) {
		case ARM_SMCCC_TRNG_VERSION:
		case ARM_SMCCC_TRNG_FEATURES:
		case ARM_SMCCC_TRNG_GET_UUID:
		case ARM_SMCCC_TRNG_RND32:
		case ARM_SMCCC_TRNG_RND64:
			val = TRNG_SUCCESS;
		}
		break;
	case ARM_SMCCC_TRNG_GET_UUID:
		smccc_set_retval(vcpu, le32_to_cpu(u[0]), le32_to_cpu(u[1]),
				 le32_to_cpu(u[2]), le32_to_cpu(u[3]));
		return 1;
	case ARM_SMCCC_TRNG_RND32:
		size = 32;
		fallthrough;
	case ARM_SMCCC_TRNG_RND64:
		return kvm_trng_do_rnd(vcpu, size);
	}

	smccc_set_retval(vcpu, val, 0, 0, 0);
	return 1;
}

Annotation

Implementation Notes