| Bipin Ravi | 8649974 | 2022-01-18 01:59:06 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2022, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
| 9 | #include <services/arm_arch_svc.h> |
| 10 | #include "wa_cve_2022_23960_bhb.S" |
| 11 | |
| 12 | /* |
| 13 | * This macro is used to isolate the vector table for relevant CPUs |
| 14 | * used in the mitigation for CVE_2022_23960. |
| 15 | */ |
| 16 | .macro wa_cve_2022_23960_bhb_vector_table _bhb_loop_count, _cpu |
| 17 | |
| 18 | .globl wa_cve_vbar_\_cpu |
| 19 | |
| 20 | vector_base wa_cve_vbar_\_cpu |
| 21 | /* --------------------------------------------------------------------- |
| 22 | * Current EL with SP_EL0 : 0x0 - 0x200 |
| 23 | * --------------------------------------------------------------------- |
| 24 | */ |
| 25 | vector_entry bhb_sync_exception_sp_el0_\_cpu |
| 26 | b sync_exception_sp_el0 |
| 27 | end_vector_entry bhb_sync_exception_sp_el0_\_cpu |
| 28 | |
| 29 | vector_entry bhb_irq_sp_el0_\_cpu |
| 30 | b irq_sp_el0 |
| 31 | end_vector_entry bhb_irq_sp_el0_\_cpu |
| 32 | |
| 33 | vector_entry bhb_fiq_sp_el0_\_cpu |
| 34 | b fiq_sp_el0 |
| 35 | end_vector_entry bhb_fiq_sp_el0_\_cpu |
| 36 | |
| 37 | vector_entry bhb_serror_sp_el0_\_cpu |
| 38 | b serror_sp_el0 |
| 39 | end_vector_entry bhb_serror_sp_el0_\_cpu |
| 40 | |
| 41 | /* --------------------------------------------------------------------- |
| 42 | * Current EL with SP_ELx: 0x200 - 0x400 |
| 43 | * --------------------------------------------------------------------- |
| 44 | */ |
| 45 | vector_entry bhb_sync_exception_sp_elx_\_cpu |
| 46 | b sync_exception_sp_elx |
| 47 | end_vector_entry bhb_sync_exception_sp_elx_\_cpu |
| 48 | |
| 49 | vector_entry bhb_irq_sp_elx_\_cpu |
| 50 | b irq_sp_elx |
| 51 | end_vector_entry bhb_irq_sp_elx_\_cpu |
| 52 | |
| 53 | vector_entry bhb_fiq_sp_elx_\_cpu |
| 54 | b fiq_sp_elx |
| 55 | end_vector_entry bhb_fiq_sp_elx_\_cpu |
| 56 | |
| 57 | vector_entry bhb_serror_sp_elx_\_cpu |
| 58 | b serror_sp_elx |
| 59 | end_vector_entry bhb_serror_sp_elx_\_cpu |
| 60 | |
| 61 | /* --------------------------------------------------------------------- |
| 62 | * Lower EL using AArch64 : 0x400 - 0x600 |
| 63 | * --------------------------------------------------------------------- |
| 64 | */ |
| 65 | vector_entry bhb_sync_exception_aarch64_\_cpu |
| 66 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 67 | b sync_exception_aarch64 |
| 68 | end_vector_entry bhb_sync_exception_aarch64_\_cpu |
| 69 | |
| 70 | vector_entry bhb_irq_aarch64_\_cpu |
| 71 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 72 | b irq_aarch64 |
| 73 | end_vector_entry bhb_irq_aarch64_\_cpu |
| 74 | |
| 75 | vector_entry bhb_fiq_aarch64_\_cpu |
| 76 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 77 | b fiq_aarch64 |
| 78 | end_vector_entry bhb_fiq_aarch64_\_cpu |
| 79 | |
| 80 | vector_entry bhb_serror_aarch64_\_cpu |
| 81 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 82 | b serror_aarch64 |
| 83 | end_vector_entry bhb_serror_aarch64_\_cpu |
| 84 | |
| 85 | /* --------------------------------------------------------------------- |
| 86 | * Lower EL using AArch32 : 0x600 - 0x800 |
| 87 | * --------------------------------------------------------------------- |
| 88 | */ |
| 89 | vector_entry bhb_sync_exception_aarch32_\_cpu |
| 90 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 91 | b sync_exception_aarch32 |
| 92 | end_vector_entry bhb_sync_exception_aarch32_\_cpu |
| 93 | |
| 94 | vector_entry bhb_irq_aarch32_\_cpu |
| 95 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 96 | b irq_aarch32 |
| 97 | end_vector_entry bhb_irq_aarch32_\_cpu |
| 98 | |
| 99 | vector_entry bhb_fiq_aarch32_\_cpu |
| 100 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 101 | b fiq_aarch32 |
| 102 | end_vector_entry bhb_fiq_aarch32_\_cpu |
| 103 | |
| 104 | vector_entry bhb_serror_aarch32_\_cpu |
| 105 | apply_cve_2022_23960_bhb_wa \_bhb_loop_count |
| 106 | b serror_aarch32 |
| 107 | end_vector_entry bhb_serror_aarch32_\_cpu |
| 108 | .endm |