| Sona Mathew | c8f5a2e | 2025-02-04 15:22:01 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2024, Arm Limited. All rights reserved. |
| 3 | * SPDX-License-Identifier: BSD-3-Clause |
| 4 | */ |
| 5 | |
| 6 | #include <arch_helpers.h> |
| 7 | #include <debug.h> |
| 8 | #include <realm_tests.h> |
| 9 | #include <realm_helpers.h> |
| 10 | #include <sync.h> |
| 11 | |
| 12 | /* Try to enable Branch recording in R-EL1 via BRBCR_EL1 */ |
| 13 | |
| 14 | bool test_realm_write_brbcr_el1_reg(void) |
| 15 | { |
| 16 | unsigned long brbcr_el1; |
| 17 | bool ret_result = false; |
| 18 | realm_reset_undef_abort_count(); |
| 19 | |
| 20 | /* Install exception handler to catch undefined abort */ |
| 21 | register_custom_sync_exception_handler(realm_sync_exception_handler); |
| 22 | |
| 23 | brbcr_el1 = read_brbcr_el1(); |
| 24 | brbcr_el1 |= BRBCR_EL1_INIT; |
| 25 | write_brbcr_el1(brbcr_el1); |
| 26 | |
| 27 | read_brbfcr_el1(); |
| 28 | read_brbts_el1(); |
| 29 | read_brbinfinj_el1(); |
| 30 | read_brbsrcinj_el1(); |
| 31 | read_brbtgtinj_el1(); |
| 32 | read_brbidr0_el1(); |
| 33 | read_brbsrc11_el1(); |
| 34 | read_brbtgt0_el1(); |
| 35 | read_brbinf15_el1(); |
| 36 | |
| 37 | if (realm_get_undef_abort_count() == 11UL) { |
| 38 | ret_result = true; |
| 39 | } |
| 40 | unregister_custom_sync_exception_handler(); |
| 41 | return ret_result; |
| 42 | |
| 43 | } |