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Merge "fix(xlat): correct attribute retrieval in a RME enabled system" into integration

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This commit is contained in:
Olivier Deprez 2024-07-24 18:20:37 +02:00 • committed by TrustedFirmware Code Review
commit 07354cfbde
2 changed files with 57 additions and 5 deletions
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6
include/lib/xlat_tables/xlat_tables_defs.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017-2021, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -171,8 +171,10 @@
#define SHAREABILITY_SHIFT 8
/* The Access Flag, AF. */
#define ACCESS_FLAG_SHIFT 10
/* The not global bit, nG. */
/* The not global bit, nG */
#define NOT_GLOBAL_SHIFT 11
/* The Non-secure Extension bit, NSE */
#define NSE_SHIFT 11
/* Contiguous hint bit. */
#define CONT_HINT_SHIFT 52
/* Execute-never bits, XN. */

56
lib/xlat_tables_v2/xlat_tables_utils.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017-2021, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -13,6 +13,7 @@
#include <platform_def.h>
#include <arch_features.h>
#include <arch_helpers.h>
#include <common/debug.h>
#include <lib/utils_def.h>
@ -419,10 +420,59 @@ static int xlat_get_mem_attributes_internal(const xlat_ctx_t *ctx,
*attributes |= MT_USER;
}
uint64_t ns_bit = (desc >> NS_SHIFT) & 1U;
uint64_t ns_bit = (desc >> NS_SHIFT) & 1ULL;
if (ns_bit == 1U)
#if ENABLE_RME
uint64_t nse_bit = (desc >> NSE_SHIFT) & 1ULL;
uint32_t sec_state = (uint32_t)(ns_bit | (nse_bit << 1ULL));
/*
* =========================================================
* NSE NS | Output PA space
* =========================================================
* 0 0 | Secure (if S-EL2 is present, else invalid)
* 0 1 | Non-secure
* 1 0 | Root
* 1 1 | Realm
*==========================================================
*/
switch (sec_state) {
case 0U:
/*
* We expect to get Secure mapping on an RME system only if
* S-EL2 is enabled.
* Hence panic() if we hit the case without EEL2 being enabled.
*/
if ((read_scr_el3() & SCR_EEL2_BIT) == 0ULL) {
ERROR("A secure descriptor is not supported when"
"FEAT_RME is implemented and FEAT_SEL2 is"
"not enabled\n");
panic();
} else {
*attributes |= MT_SECURE;
}
break;
case 1U:
*attributes |= MT_NS;
break;
case 2U:
*attributes |= MT_ROOT;
break;
case 3U:
*attributes |= MT_REALM;
break;
default:
/* unreachable code */
assert(false);
break;
}
#else /* !ENABLE_RME */
if (ns_bit == 1ULL) {
*attributes |= MT_NS;
} else {
*attributes |= MT_SECURE;
}
#endif /* ENABLE_RME */
uint64_t xn_mask = xlat_arch_regime_get_xn_desc(ctx->xlat_regime);