mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 19:56:45 +07:00
33b6d03469
With TPM 2.0 specification, the event logs may only be accessible by
calling an EFI Boot Service. Modify the EFI stub to copy the log area to
a new Linux-specific EFI configuration table so it remains accessible
once booted.
When calling this service, it is possible to specify the expected format
of the logs: TPM 1.2 (SHA1) or TPM 2.0 ("Crypto Agile"). For now, only the
first format is retrieved.
Signed-off-by: Thiebaud Weksteen <tweek@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
41 lines
989 B
C
41 lines
989 B
C
/*
|
|
* Copyright (C) 2017 Google, Inc.
|
|
* Thiebaud Weksteen <tweek@google.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/efi.h>
|
|
#include <linux/init.h>
|
|
#include <linux/memblock.h>
|
|
|
|
#include <asm/early_ioremap.h>
|
|
|
|
/*
|
|
* Reserve the memory associated with the TPM Event Log configuration table.
|
|
*/
|
|
int __init efi_tpm_eventlog_init(void)
|
|
{
|
|
struct linux_efi_tpm_eventlog *log_tbl;
|
|
unsigned int tbl_size;
|
|
|
|
if (efi.tpm_log == EFI_INVALID_TABLE_ADDR)
|
|
return 0;
|
|
|
|
log_tbl = early_memremap(efi.tpm_log, sizeof(*log_tbl));
|
|
if (!log_tbl) {
|
|
pr_err("Failed to map TPM Event Log table @ 0x%lx\n",
|
|
efi.tpm_log);
|
|
efi.tpm_log = EFI_INVALID_TABLE_ADDR;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
tbl_size = sizeof(*log_tbl) + log_tbl->size;
|
|
memblock_reserve(efi.tpm_log, tbl_size);
|
|
early_memunmap(log_tbl, sizeof(*log_tbl));
|
|
return 0;
|
|
}
|
|
|