1 // SPDX-License-Identifier: GPL-2.0-or-later
9  *	Kylene Hall <kjhall@us.ibm.com>
12  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
54 	len -= sizeof(*event_header);  in tpm_is_tpm2_log()
59 	efispecid = (struct tcg_efi_specid_event_head *)event_header->event;  in tpm_is_tpm2_log()
61 	n = memcmp(efispecid->signature, TCG_SPECID_SIG,  in tpm_is_tpm2_log()
79 	log = &chip->log;  in tpm_read_log_acpi()
84 	if (!chip->acpi_dev_handle)  in tpm_read_log_acpi()
85 		return -ENODEV;  in tpm_read_log_acpi()
87 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {  in tpm_read_log_acpi()
91 			return -ENODEV;  in tpm_read_log_acpi()
93 		if (tbl->header.length <  in tpm_read_log_acpi()
96 			return -ENODEV;  in tpm_read_log_acpi()
100 		len = tpm2_phy->log_area_minimum_length;  in tpm_read_log_acpi()
102 		start = tpm2_phy->log_area_start_address;  in tpm_read_log_acpi()
105 			return -ENODEV;  in tpm_read_log_acpi()
115 			return -ENODEV;  in tpm_read_log_acpi()
117 		switch (buff->platform_class) {  in tpm_read_log_acpi()
119 			len = buff->server.log_max_len;  in tpm_read_log_acpi()
120 			start = buff->server.log_start_addr;  in tpm_read_log_acpi()
124 			len = buff->client.log_max_len;  in tpm_read_log_acpi()
125 			start = buff->client.log_start_addr;  in tpm_read_log_acpi()
134 		dev_warn(&chip->dev, "%s: TCPA log area empty\n", __func__);  in tpm_read_log_acpi()
135 		return -EIO;  in tpm_read_log_acpi()
139 	log->bios_event_log = devm_kmalloc(&chip->dev, len, GFP_KERNEL);  in tpm_read_log_acpi()
140 	if (!log->bios_event_log)  in tpm_read_log_acpi()
141 		return -ENOMEM;  in tpm_read_log_acpi()
143 	log->bios_event_log_end = log->bios_event_log + len;  in tpm_read_log_acpi()
147 		dev_warn(&chip->dev, "%s: Failed to map ACPI memory\n", __func__);  in tpm_read_log_acpi()
149 		ret = -ENODEV;  in tpm_read_log_acpi()
153 	memcpy_fromio(log->bios_event_log, virt, len);  in tpm_read_log_acpi()
157 	if (chip->flags & TPM_CHIP_FLAG_TPM2 &&  in tpm_read_log_acpi()
158 	    !tpm_is_tpm2_log(log->bios_event_log, len)) {  in tpm_read_log_acpi()
160 		ret = -ENODEV;  in tpm_read_log_acpi()
167 	devm_kfree(&chip->dev, log->bios_event_log);  in tpm_read_log_acpi()
168 	log->bios_event_log = NULL;  in tpm_read_log_acpi()