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feat(drtm): add remediation driver support in DRTM

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Added remediation driver for DRTM to set/get the error
from non-volatile memory

Change-Id: I8f0873dcef4936693e0f39a3c95096cb689c04b7
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Signed-off-by: Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
This commit is contained in:
Manish V Badarkhe 2022-06-21 09:41:32 +01:00
parent 586f60cc57
commit 1436e37dcb
4 changed files with 78 additions and 2 deletions
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1
bl31/bl31.mk
View file

@ -152,6 +152,7 @@ BL31_SOURCES += services/std_svc/drtm/drtm_main.c \
services/std_svc/drtm/drtm_dma_prot.c \
services/std_svc/drtm/drtm_res_address_map.c \
services/std_svc/drtm/drtm_measurements.c \
services/std_svc/drtm/drtm_remediation.c \
${MBEDTLS_SOURCES}
endif

5
services/std_svc/drtm/drtm_main.c
View file

@ -19,6 +19,7 @@
#include <common/runtime_svc.h>
#include <drivers/auth/crypto_mod.h>
#include "drtm_main.h"
#include "drtm_remediation.h"
#include <lib/psci/psci_lib.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <plat/common/platform.h>
@ -512,12 +513,12 @@ uint64_t drtm_smc_handler(uint32_t smc_fid,
case ARM_DRTM_SVC_GET_ERROR:
INFO("DRTM service handler: get error\n");
SMC_RET2(handle, SMC_OK, 0);
drtm_get_error(handle);
break; /* not reached */
case ARM_DRTM_SVC_SET_ERROR:
INFO("DRTM service handler: set error\n");
SMC_RET1(handle, SMC_OK);
drtm_set_error(x1, handle);
break; /* not reached */
case ARM_DRTM_SVC_SET_TCB_HASH:

59
services/std_svc/drtm/drtm_remediation.c Normal file
View file

@ -0,0 +1,59 @@
/*
* Copyright (c) 2022 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
* DRTM support for DRTM error remediation.
*
*/
#include <inttypes.h>
#include <stdint.h>
#include <common/debug.h>
#include <common/runtime_svc.h>
#include "drtm_main.h"
#include <plat/common/platform.h>
uint64_t drtm_set_error(uint64_t x1, void *ctx)
{
int rc;
rc = plat_set_drtm_error(x1);
if (rc != 0) {
SMC_RET1(ctx, INTERNAL_ERROR);
}
SMC_RET1(ctx, SUCCESS);
}
uint64_t drtm_get_error(void *ctx)
{
uint64_t error_code;
int rc;
rc = plat_get_drtm_error(&error_code);
if (rc != 0) {
SMC_RET1(ctx, INTERNAL_ERROR);
}
SMC_RET2(ctx, SUCCESS, error_code);
}
void drtm_enter_remediation(uint64_t err_code, const char *err_str)
{
int rc = plat_set_drtm_error(err_code);
if (rc != 0) {
ERROR("%s(): drtm_error_set() failed unexpectedly rc=%d\n",
__func__, rc);
panic();
}
ERROR("DRTM: entering remediation of error:\n%" PRIu64 "\t\'%s\'\n",
err_code, err_str);
ERROR("%s(): system reset is not yet supported\n", __func__);
plat_system_reset();
}

15
services/std_svc/drtm/drtm_remediation.h Normal file
View file

@ -0,0 +1,15 @@
/*
* Copyright (c) 2022 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#ifndef DRTM_REMEDIATION_H
#define DRTM_REMEDIATION_H
uint64_t drtm_set_error(uint64_t x1, void *ctx);
uint64_t drtm_get_error(void *ctx);
void drtm_enter_remediation(uint64_t error_code, const char *error_str);
#endif /* DRTM_REMEDIATION_H */