mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
c5df39262d
This patch retrieves the event log data from the device tree during file open. The event log data will then displayed through securityfs. Signed-off-by: Ashley Lai <adlai@us.ibm.com> Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/*
|
|
* Copyright 2012 IBM Corporation
|
|
*
|
|
* Author: Ashley Lai <adlai@us.ibm.com>
|
|
*
|
|
* Maintained by: <tpmdd-devel@lists.sourceforge.net>
|
|
*
|
|
* Read the event log created by the firmware on PPC64
|
|
*
|
|
* 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/slab.h>
|
|
#include <linux/of.h>
|
|
|
|
#include "tpm.h"
|
|
#include "tpm_eventlog.h"
|
|
|
|
int read_log(struct tpm_bios_log *log)
|
|
{
|
|
struct device_node *np;
|
|
const u32 *sizep;
|
|
const __be64 *basep;
|
|
|
|
if (log->bios_event_log != NULL) {
|
|
pr_err("%s: ERROR - Eventlog already initialized\n", __func__);
|
|
return -EFAULT;
|
|
}
|
|
|
|
np = of_find_node_by_name(NULL, "ibm,vtpm");
|
|
if (!np) {
|
|
pr_err("%s: ERROR - IBMVTPM not supported\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
sizep = of_get_property(np, "linux,sml-size", NULL);
|
|
if (sizep == NULL) {
|
|
pr_err("%s: ERROR - SML size not found\n", __func__);
|
|
goto cleanup_eio;
|
|
}
|
|
if (*sizep == 0) {
|
|
pr_err("%s: ERROR - event log area empty\n", __func__);
|
|
goto cleanup_eio;
|
|
}
|
|
|
|
basep = of_get_property(np, "linux,sml-base", NULL);
|
|
if (basep == NULL) {
|
|
pr_err(KERN_ERR "%s: ERROR - SML not found\n", __func__);
|
|
goto cleanup_eio;
|
|
}
|
|
|
|
of_node_put(np);
|
|
log->bios_event_log = kmalloc(*sizep, GFP_KERNEL);
|
|
if (!log->bios_event_log) {
|
|
pr_err("%s: ERROR - Not enough memory for BIOS measurements\n",
|
|
__func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
log->bios_event_log_end = log->bios_event_log + *sizep;
|
|
|
|
memcpy(log->bios_event_log, __va(be64_to_cpup(basep)), *sizep);
|
|
|
|
return 0;
|
|
|
|
cleanup_eio:
|
|
of_node_put(np);
|
|
return -EIO;
|
|
}
|