f9143c1200
Add support for this command, moving away from the previous approach of hard-coding the initial data in the driver, now that the kernel-space data has to be set up by the higher-level vboot code. Signed-off-by: Simon Glass <sjg@chromium.org>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Common features for sandbox TPM1 and TPM2 implementations
|
|
*
|
|
* Copyright 2021 Google LLC
|
|
*/
|
|
|
|
#define LOG_CATEGORY UCLASS_TPM
|
|
|
|
#include <common.h>
|
|
#include <tpm-v1.h>
|
|
#include <tpm-v2.h>
|
|
#include <asm/unaligned.h>
|
|
#include "sandbox_common.h"
|
|
|
|
#define TPM_ERR_CODE_OFS (2 + 4) /* after tag and size */
|
|
|
|
int sb_tpm_index_to_seq(u32 index)
|
|
{
|
|
index &= ~HR_NV_INDEX;
|
|
switch (index) {
|
|
case FIRMWARE_NV_INDEX:
|
|
return NV_SEQ_FIRMWARE;
|
|
case KERNEL_NV_INDEX:
|
|
return NV_SEQ_KERNEL;
|
|
case BACKUP_NV_INDEX:
|
|
return NV_SEQ_BACKUP;
|
|
case FWMP_NV_INDEX:
|
|
return NV_SEQ_FWMP;
|
|
case MRC_REC_HASH_NV_INDEX:
|
|
return NV_SEQ_REC_HASH;
|
|
case 0:
|
|
return NV_SEQ_GLOBAL_LOCK;
|
|
case TPM_NV_INDEX_LOCK:
|
|
return NV_SEQ_ENABLE_LOCKING;
|
|
}
|
|
|
|
printf("Invalid nv index %#x\n", index);
|
|
return -1;
|
|
}
|
|
|
|
void sb_tpm_read_data(const struct nvdata_state nvdata[NV_SEQ_COUNT],
|
|
enum sandbox_nv_space seq, u8 *buf, int data_ofs,
|
|
int length)
|
|
{
|
|
const struct nvdata_state *nvd = &nvdata[seq];
|
|
|
|
if (!nvd->present)
|
|
put_unaligned_be32(TPM_BADINDEX, buf + TPM_ERR_CODE_OFS);
|
|
else if (length > nvd->length)
|
|
put_unaligned_be32(TPM_BAD_DATASIZE, buf + TPM_ERR_CODE_OFS);
|
|
else
|
|
memcpy(buf + data_ofs, &nvd->data, length);
|
|
}
|
|
|
|
void sb_tpm_write_data(struct nvdata_state nvdata[NV_SEQ_COUNT],
|
|
enum sandbox_nv_space seq, const u8 *buf, int data_ofs,
|
|
int length)
|
|
{
|
|
struct nvdata_state *nvd = &nvdata[seq];
|
|
|
|
if (length > nvd->length)
|
|
log_err("Invalid length %x (max %x)\n", length, nvd->length);
|
|
else
|
|
memcpy(&nvdata[seq].data, buf + data_ofs, length);
|
|
}
|
|
|
|
void sb_tpm_define_data(struct nvdata_state nvdata[NV_SEQ_COUNT],
|
|
enum sandbox_nv_space seq, int length)
|
|
{
|
|
struct nvdata_state *nvd = &nvdata[seq];
|
|
|
|
if (length > NV_DATA_SIZE)
|
|
log_err("Invalid length %x (max %x)\n", length, NV_DATA_SIZE);
|
|
nvd->length = length;
|
|
nvd->present = true;
|
|
}
|