diff options
| author | Rodrigo Vivi <[email protected]> | 2018-07-23 09:13:12 -0700 | 
|---|---|---|
| committer | Rodrigo Vivi <[email protected]> | 2018-07-23 09:13:12 -0700 | 
| commit | c74a7469f97c0f40b46e82ee979f9fb1bb6e847c (patch) | |
| tree | f2690a1a916b73ef94657fbf0e0141ae57701825 /drivers/char/tpm/tpm2_eventlog.c | |
| parent | 6f15a7de86c8cf2dc09fc9e6d07047efa40ef809 (diff) | |
| parent | 500775074f88d9cf5416bed2ca19592812d62c41 (diff) | |
Merge drm/drm-next into drm-intel-next-queued
We need a backmerge to get DP_DPCD_REV_14 before we push other
i915 changes to dinq that could break compilation.
Signed-off-by: Rodrigo Vivi <[email protected]>
Diffstat (limited to 'drivers/char/tpm/tpm2_eventlog.c')
| -rw-r--r-- | drivers/char/tpm/tpm2_eventlog.c | 209 | 
1 files changed, 0 insertions, 209 deletions
| diff --git a/drivers/char/tpm/tpm2_eventlog.c b/drivers/char/tpm/tpm2_eventlog.c deleted file mode 100644 index 1ce4411292ba..000000000000 --- a/drivers/char/tpm/tpm2_eventlog.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * Copyright (C) 2016 IBM Corporation - * - * Authors: - *      Nayna Jain <[email protected]> - * - * Access to TPM 2.0 event log as written by Firmware. - * It assumes that writer of event log has followed TCG Specification - * for Family "2.0" and written the event data in little endian. - * With that, it doesn't need any endian conversion for structure - * content. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/seq_file.h> -#include <linux/fs.h> -#include <linux/security.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/tpm_eventlog.h> - -#include "tpm.h" - -/* - * calc_tpm2_event_size() - calculate the event size, where event - * is an entry in the TPM 2.0 event log. The event is of type Crypto - * Agile Log Entry Format as defined in TCG EFI Protocol Specification - * Family "2.0". - - * @event: event whose size is to be calculated. - * @event_header: the first event in the event log. - * - * Returns size of the event. If it is an invalid event, returns 0. - */ -static int calc_tpm2_event_size(struct tcg_pcr_event2 *event, -				struct tcg_pcr_event *event_header) -{ -	struct tcg_efi_specid_event *efispecid; -	struct tcg_event_field *event_field; -	void *marker; -	void *marker_start; -	u32 halg_size; -	size_t size; -	u16 halg; -	int i; -	int j; - -	marker = event; -	marker_start = marker; -	marker = marker + sizeof(event->pcr_idx) + sizeof(event->event_type) -		+ sizeof(event->count); - -	efispecid = (struct tcg_efi_specid_event *)event_header->event; - -	/* Check if event is malformed. */ -	if (event->count > efispecid->num_algs) -		return 0; - -	for (i = 0; i < event->count; i++) { -		halg_size = sizeof(event->digests[i].alg_id); -		memcpy(&halg, marker, halg_size); -		marker = marker + halg_size; -		for (j = 0; j < efispecid->num_algs; j++) { -			if (halg == efispecid->digest_sizes[j].alg_id) { -				marker += -					efispecid->digest_sizes[j].digest_size; -				break; -			} -		} -		/* Algorithm without known length. Such event is unparseable. */ -		if (j == efispecid->num_algs) -			return 0; -	} - -	event_field = (struct tcg_event_field *)marker; -	marker = marker + sizeof(event_field->event_size) -		+ event_field->event_size; -	size = marker - marker_start; - -	if ((event->event_type == 0) && (event_field->event_size == 0)) -		return 0; - -	return size; -} - -static void *tpm2_bios_measurements_start(struct seq_file *m, loff_t *pos) -{ -	struct tpm_chip *chip = m->private; -	struct tpm_bios_log *log = &chip->log; -	void *addr = log->bios_event_log; -	void *limit = log->bios_event_log_end; -	struct tcg_pcr_event *event_header; -	struct tcg_pcr_event2 *event; -	size_t size; -	int i; - -	event_header = addr; -	size = sizeof(struct tcg_pcr_event) - sizeof(event_header->event) -		+ event_header->event_size; - -	if (*pos == 0) { -		if (addr + size < limit) { -			if ((event_header->event_type == 0) && -			    (event_header->event_size == 0)) -				return NULL; -			return SEQ_START_TOKEN; -		} -	} - -	if (*pos > 0) { -		addr += size; -		event = addr; -		size = calc_tpm2_event_size(event, event_header); -		if ((addr + size >=  limit) || (size == 0)) -			return NULL; -	} - -	for (i = 0; i < (*pos - 1); i++) { -		event = addr; -		size = calc_tpm2_event_size(event, event_header); - -		if ((addr + size >= limit) || (size == 0)) -			return NULL; -		addr += size; -	} - -	return addr; -} - -static void *tpm2_bios_measurements_next(struct seq_file *m, void *v, -					 loff_t *pos) -{ -	struct tcg_pcr_event *event_header; -	struct tcg_pcr_event2 *event; -	struct tpm_chip *chip = m->private; -	struct tpm_bios_log *log = &chip->log; -	void *limit = log->bios_event_log_end; -	size_t event_size; -	void *marker; - -	event_header = log->bios_event_log; - -	if (v == SEQ_START_TOKEN) { -		event_size = sizeof(struct tcg_pcr_event) - -			sizeof(event_header->event) + event_header->event_size; -		marker = event_header; -	} else { -		event = v; -		event_size = calc_tpm2_event_size(event, event_header); -		if (event_size == 0) -			return NULL; -		marker = event; -	} - -	marker = marker + event_size; -	if (marker >= limit) -		return NULL; -	v = marker; -	event = v; - -	event_size = calc_tpm2_event_size(event, event_header); -	if (((v + event_size) >= limit) || (event_size == 0)) -		return NULL; - -	(*pos)++; -	return v; -} - -static void tpm2_bios_measurements_stop(struct seq_file *m, void *v) -{ -} - -static int tpm2_binary_bios_measurements_show(struct seq_file *m, void *v) -{ -	struct tpm_chip *chip = m->private; -	struct tpm_bios_log *log = &chip->log; -	struct tcg_pcr_event *event_header = log->bios_event_log; -	struct tcg_pcr_event2 *event = v; -	void *temp_ptr; -	size_t size; - -	if (v == SEQ_START_TOKEN) { -		size = sizeof(struct tcg_pcr_event) - -			sizeof(event_header->event) + event_header->event_size; - -		temp_ptr = event_header; - -		if (size > 0) -			seq_write(m, temp_ptr, size); -	} else { -		size = calc_tpm2_event_size(event, event_header); -		temp_ptr = event; -		if (size > 0) -			seq_write(m, temp_ptr, size); -	} - -	return 0; -} - -const struct seq_operations tpm2_binary_b_measurements_seqops = { -	.start = tpm2_bios_measurements_start, -	.next = tpm2_bios_measurements_next, -	.stop = tpm2_bios_measurements_stop, -	.show = tpm2_binary_bios_measurements_show, -}; |