Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <arm_arch_svc.h> |
| 9 | #include <asm_macros.S> |
| 10 | #include <context.h> |
| 11 | |
| 12 | .globl wa_cve_2017_5715_mmu_vbar |
| 13 | |
| 14 | #define ESR_EL3_A64_SMC0 0x5e000000 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 15 | #define ESR_EL3_A32_SMC0 0x4e000000 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 16 | |
| 17 | vector_base wa_cve_2017_5715_mmu_vbar |
| 18 | |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 19 | .macro apply_cve_2017_5715_wa _is_sync_exception _esr_el3_val |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 20 | stp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0] |
| 21 | mrs x1, sctlr_el3 |
| 22 | /* Disable MMU */ |
| 23 | bic x1, x1, #SCTLR_M_BIT |
| 24 | msr sctlr_el3, x1 |
| 25 | isb |
| 26 | /* Enable MMU */ |
| 27 | orr x1, x1, #SCTLR_M_BIT |
| 28 | msr sctlr_el3, x1 |
| 29 | /* |
| 30 | * Defer ISB to avoid synchronizing twice in case we hit |
| 31 | * the workaround SMC call which will implicitly synchronize |
| 32 | * because of the ERET instruction. |
| 33 | */ |
| 34 | |
| 35 | /* |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 36 | * Ensure SMC is coming from A64/A32 state on #0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 37 | * with W0 = SMCCC_ARCH_WORKAROUND_1 |
| 38 | * |
| 39 | * This sequence evaluates as: |
| 40 | * (W0==SMCCC_ARCH_WORKAROUND_1) ? (ESR_EL3==SMC#0) : (NE) |
| 41 | * allowing use of a single branch operation |
| 42 | */ |
| 43 | .if \_is_sync_exception |
| 44 | orr w1, wzr, #SMCCC_ARCH_WORKAROUND_1 |
| 45 | cmp w0, w1 |
| 46 | mrs x0, esr_el3 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 47 | mov_imm w1, \_esr_el3_val |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 48 | ccmp w0, w1, #0, eq |
| 49 | /* Static predictor will predict a fall through */ |
| 50 | bne 1f |
| 51 | eret |
| 52 | 1: |
| 53 | .endif |
| 54 | |
| 55 | /* |
| 56 | * Synchronize now to enable the MMU. This is required |
| 57 | * to ensure the load pair below reads the data stored earlier. |
| 58 | */ |
| 59 | isb |
| 60 | ldp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0] |
| 61 | .endm |
| 62 | |
| 63 | /* --------------------------------------------------------------------- |
| 64 | * Current EL with SP_EL0 : 0x0 - 0x200 |
| 65 | * --------------------------------------------------------------------- |
| 66 | */ |
| 67 | vector_entry mmu_sync_exception_sp_el0 |
| 68 | b sync_exception_sp_el0 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 69 | end_vector_entry mmu_sync_exception_sp_el0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 70 | |
| 71 | vector_entry mmu_irq_sp_el0 |
| 72 | b irq_sp_el0 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 73 | end_vector_entry mmu_irq_sp_el0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 74 | |
| 75 | vector_entry mmu_fiq_sp_el0 |
| 76 | b fiq_sp_el0 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 77 | end_vector_entry mmu_fiq_sp_el0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 78 | |
| 79 | vector_entry mmu_serror_sp_el0 |
| 80 | b serror_sp_el0 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 81 | end_vector_entry mmu_serror_sp_el0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 82 | |
| 83 | /* --------------------------------------------------------------------- |
| 84 | * Current EL with SP_ELx: 0x200 - 0x400 |
| 85 | * --------------------------------------------------------------------- |
| 86 | */ |
| 87 | vector_entry mmu_sync_exception_sp_elx |
| 88 | b sync_exception_sp_elx |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 89 | end_vector_entry mmu_sync_exception_sp_elx |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 90 | |
| 91 | vector_entry mmu_irq_sp_elx |
| 92 | b irq_sp_elx |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 93 | end_vector_entry mmu_irq_sp_elx |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 94 | |
| 95 | vector_entry mmu_fiq_sp_elx |
| 96 | b fiq_sp_elx |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 97 | end_vector_entry mmu_fiq_sp_elx |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 98 | |
| 99 | vector_entry mmu_serror_sp_elx |
| 100 | b serror_sp_elx |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 101 | end_vector_entry mmu_serror_sp_elx |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 102 | |
| 103 | /* --------------------------------------------------------------------- |
| 104 | * Lower EL using AArch64 : 0x400 - 0x600 |
| 105 | * --------------------------------------------------------------------- |
| 106 | */ |
| 107 | vector_entry mmu_sync_exception_aarch64 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 108 | apply_cve_2017_5715_wa _is_sync_exception=1 _esr_el3_val=ESR_EL3_A64_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 109 | b sync_exception_aarch64 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 110 | end_vector_entry mmu_sync_exception_aarch64 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 111 | |
| 112 | vector_entry mmu_irq_aarch64 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 113 | apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A64_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 114 | b irq_aarch64 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 115 | end_vector_entry mmu_irq_aarch64 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 116 | |
| 117 | vector_entry mmu_fiq_aarch64 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 118 | apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A64_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 119 | b fiq_aarch64 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 120 | end_vector_entry mmu_fiq_aarch64 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 121 | |
| 122 | vector_entry mmu_serror_aarch64 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 123 | apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A64_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 124 | b serror_aarch64 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 125 | end_vector_entry mmu_serror_aarch64 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 126 | |
| 127 | /* --------------------------------------------------------------------- |
| 128 | * Lower EL using AArch32 : 0x600 - 0x800 |
| 129 | * --------------------------------------------------------------------- |
| 130 | */ |
| 131 | vector_entry mmu_sync_exception_aarch32 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 132 | apply_cve_2017_5715_wa _is_sync_exception=1 _esr_el3_val=ESR_EL3_A32_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 133 | b sync_exception_aarch32 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 134 | end_vector_entry mmu_sync_exception_aarch32 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 135 | |
| 136 | vector_entry mmu_irq_aarch32 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 137 | apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A32_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 138 | b irq_aarch32 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 139 | end_vector_entry mmu_irq_aarch32 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 140 | |
| 141 | vector_entry mmu_fiq_aarch32 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 142 | apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A32_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 143 | b fiq_aarch32 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 144 | end_vector_entry mmu_fiq_aarch32 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 145 | |
| 146 | vector_entry mmu_serror_aarch32 |
Dimitris Papastamos | 6694633 | 2018-05-31 11:38:33 +0100 | [diff] [blame] | 147 | apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A32_SMC0 |
Dimitris Papastamos | 570c06a | 2018-04-06 15:29:34 +0100 | [diff] [blame] | 148 | b serror_aarch32 |
Roberto Vargas | 95f30ab | 2018-04-17 11:31:43 +0100 | [diff] [blame] | 149 | end_vector_entry mmu_serror_aarch32 |