Function intel_me_extend_valid

util/intelmetool/src/me.c:598–637

Read the Extend register hash of ME firmware */

/* Read the Extend register hash of ME firmware */
int intel_me_extend_valid(struct pci_dev *dev)
{
	struct me_heres status;
	uint32_t extend[8] = {0};
	int i, count = 0;

	pci_read_dword_ptr(dev, &status, PCI_ME_HERES);
	if (!status.extend_feature_present) {
		printf("ME: Extend Feature not present\n");
		return -1;
	}

	if (!status.extend_reg_valid) {
		printf("ME: Extend Register not valid\n");
		return -1;
	}

	switch (status.extend_reg_algorithm) {
	case PCI_ME_EXT_SHA1:
		count = 5;
		printf("ME: Extend SHA-1: ");
		break;
	case PCI_ME_EXT_SHA256:
		count = 8;
		printf("ME: Extend SHA-256: ");
		break;
	default:
		printf("ME: Extend Algorithm %d unknown\n",
		       status.extend_reg_algorithm);
		return -1;
	}

	for (i = 0; i < count; ++i) {
		extend[i] = pci_read_long(dev, PCI_ME_HER(i));
		printf("%08x", extend[i]);
	}
	printf("\n");

	return 0;
}