1 // SPDX-License-Identifier: GPL-2.0-or-later
9  *	Kylene Hall <[email protected]>
12  * Maintained by: <tpmdd-[email protected]>
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()
84 	log = &chip->log;  in tpm_read_log_acpi()
89 	if (!chip->acpi_dev_handle)  in tpm_read_log_acpi()
90 		return -ENODEV;  in tpm_read_log_acpi()
92 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {  in tpm_read_log_acpi()
96 			return -ENODEV;  in tpm_read_log_acpi()
98 		if (tbl->header.length <  in tpm_read_log_acpi()
101 			return -ENODEV;  in tpm_read_log_acpi()
105 		len = tpm2_phy->log_area_minimum_length;  in tpm_read_log_acpi()
107 		start = tpm2_phy->log_area_start_address;  in tpm_read_log_acpi()
110 			return -ENODEV;  in tpm_read_log_acpi()
120 			return -ENODEV;  in tpm_read_log_acpi()
122 		switch (buff->platform_class) {  in tpm_read_log_acpi()
124 			len = buff->server.log_max_len;  in tpm_read_log_acpi()
125 			start = buff->server.log_start_addr;  in tpm_read_log_acpi()
129 			len = buff->client.log_max_len;  in tpm_read_log_acpi()
130 			start = buff->client.log_start_addr;  in tpm_read_log_acpi()
139 		dev_warn(&chip->dev, "%s: TCPA log area empty\n", __func__);  in tpm_read_log_acpi()
140 		return -EIO;  in tpm_read_log_acpi()
144 	log->bios_event_log = kvmalloc(len, GFP_KERNEL);  in tpm_read_log_acpi()
145 	if (!log->bios_event_log)  in tpm_read_log_acpi()
146 		return -ENOMEM;  in tpm_read_log_acpi()
148 	log->bios_event_log_end = log->bios_event_log + len;  in tpm_read_log_acpi()
152 		dev_warn(&chip->dev, "%s: Failed to map ACPI memory\n", __func__);  in tpm_read_log_acpi()
154 		ret = -ENODEV;  in tpm_read_log_acpi()
158 	memcpy_fromio(log->bios_event_log, virt, len);  in tpm_read_log_acpi()
162 	if (chip->flags & TPM_CHIP_FLAG_TPM2 &&  in tpm_read_log_acpi()
163 	    !tpm_is_tpm2_log(log->bios_event_log, len)) {  in tpm_read_log_acpi()
165 		ret = -ENODEV;  in tpm_read_log_acpi()
169 	ret = devm_add_action(&chip->dev, tpm_bios_log_free, log->bios_event_log);  in tpm_read_log_acpi()
171 		log->bios_event_log = NULL;  in tpm_read_log_acpi()
178 	tpm_bios_log_free(log->bios_event_log);  in tpm_read_log_acpi()
179 	log->bios_event_log = NULL;  in tpm_read_log_acpi()