Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 1 | /* |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved. |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 7 | #include <assert.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 8 | #include <stdbool.h> |
| 9 | |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 10 | #include <arch.h> |
| 11 | #include <arch_helpers.h> |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 12 | |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 13 | #include <lib/el3_runtime/pubsub_events.h> |
| 14 | #include <lib/extensions/amu.h> |
| 15 | #include <lib/extensions/amu_private.h> |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 16 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 17 | #include <plat/common/platform.h> |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 18 | |
| 19 | static struct amu_ctx amu_ctxs[PLATFORM_CORE_COUNT]; |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 20 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 21 | /* Check if AMUv1 for Armv8.4 or 8.6 is implemented */ |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 22 | bool amu_supported(void) |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 23 | { |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 24 | uint32_t features = read_id_pfr0() >> ID_PFR0_AMU_SHIFT; |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 25 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 26 | features &= ID_PFR0_AMU_MASK; |
| 27 | return ((features == 1U) || (features == 2U)); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 28 | } |
| 29 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 30 | #if AMU_GROUP1_NR_COUNTERS |
| 31 | /* Check if group 1 counters is implemented */ |
| 32 | bool amu_group1_supported(void) |
| 33 | { |
| 34 | uint32_t features = read_amcfgr() >> AMCFGR_NCG_SHIFT; |
| 35 | |
| 36 | return (features & AMCFGR_NCG_MASK) == 1U; |
| 37 | } |
| 38 | #endif |
| 39 | |
| 40 | /* |
| 41 | * Enable counters. This function is meant to be invoked |
| 42 | * by the context management library before exiting from EL3. |
| 43 | */ |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 44 | void amu_enable(bool el2_unused) |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 45 | { |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 46 | if (!amu_supported()) { |
| 47 | INFO("AMU is not implemented\n"); |
Dimitris Papastamos | 525c37a | 2017-11-13 09:49:45 +0000 | [diff] [blame] | 48 | return; |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | #if AMU_GROUP1_NR_COUNTERS |
| 52 | /* Check and set presence of group 1 counters */ |
| 53 | if (!amu_group1_supported()) { |
| 54 | ERROR("AMU Counter Group 1 is not implemented\n"); |
| 55 | panic(); |
| 56 | } |
| 57 | |
| 58 | /* Check number of group 1 counters */ |
| 59 | uint32_t cnt_num = (read_amcgcr() >> AMCGCR_CG1NC_SHIFT) & |
| 60 | AMCGCR_CG1NC_MASK; |
| 61 | VERBOSE("%s%u. %s%u\n", |
| 62 | "Number of AMU Group 1 Counters ", cnt_num, |
| 63 | "Requested number ", AMU_GROUP1_NR_COUNTERS); |
| 64 | |
| 65 | if (cnt_num < AMU_GROUP1_NR_COUNTERS) { |
| 66 | ERROR("%s%u is less than %s%u\n", |
| 67 | "Number of AMU Group 1 Counters ", cnt_num, |
| 68 | "Requested number ", AMU_GROUP1_NR_COUNTERS); |
| 69 | panic(); |
| 70 | } |
| 71 | #endif |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 72 | |
Dimitris Papastamos | 525c37a | 2017-11-13 09:49:45 +0000 | [diff] [blame] | 73 | if (el2_unused) { |
| 74 | uint64_t v; |
Dimitris Papastamos | 525c37a | 2017-11-13 09:49:45 +0000 | [diff] [blame] | 75 | /* |
| 76 | * Non-secure access from EL0 or EL1 to the Activity Monitor |
| 77 | * registers do not trap to EL2. |
| 78 | */ |
| 79 | v = read_hcptr(); |
| 80 | v &= ~TAM_BIT; |
| 81 | write_hcptr(v); |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 82 | } |
Dimitris Papastamos | 525c37a | 2017-11-13 09:49:45 +0000 | [diff] [blame] | 83 | |
| 84 | /* Enable group 0 counters */ |
| 85 | write_amcntenset0(AMU_GROUP0_COUNTERS_MASK); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 86 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 87 | #if AMU_GROUP1_NR_COUNTERS |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 88 | /* Enable group 1 counters */ |
| 89 | write_amcntenset1(AMU_GROUP1_COUNTERS_MASK); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 90 | #endif |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | /* Read the group 0 counter identified by the given `idx`. */ |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 94 | uint64_t amu_group0_cnt_read(unsigned int idx) |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 95 | { |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 96 | assert(amu_supported()); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 97 | assert(idx < AMU_GROUP0_NR_COUNTERS); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 98 | |
| 99 | return amu_group0_cnt_read_internal(idx); |
| 100 | } |
| 101 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 102 | /* Write the group 0 counter identified by the given `idx` with `val` */ |
| 103 | void amu_group0_cnt_write(unsigned int idx, uint64_t val) |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 104 | { |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 105 | assert(amu_supported()); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 106 | assert(idx < AMU_GROUP0_NR_COUNTERS); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 107 | |
| 108 | amu_group0_cnt_write_internal(idx, val); |
| 109 | isb(); |
| 110 | } |
| 111 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 112 | #if AMU_GROUP1_NR_COUNTERS |
| 113 | /* Read the group 1 counter identified by the given `idx` */ |
| 114 | uint64_t amu_group1_cnt_read(unsigned int idx) |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 115 | { |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 116 | assert(amu_supported()); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 117 | assert(amu_group1_supported()); |
| 118 | assert(idx < AMU_GROUP1_NR_COUNTERS); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 119 | |
| 120 | return amu_group1_cnt_read_internal(idx); |
| 121 | } |
| 122 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 123 | /* Write the group 1 counter identified by the given `idx` with `val` */ |
| 124 | void amu_group1_cnt_write(unsigned int idx, uint64_t val) |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 125 | { |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 126 | assert(amu_supported()); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 127 | assert(amu_group1_supported()); |
| 128 | assert(idx < AMU_GROUP1_NR_COUNTERS); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 129 | |
| 130 | amu_group1_cnt_write_internal(idx, val); |
| 131 | isb(); |
| 132 | } |
| 133 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 134 | /* |
| 135 | * Program the event type register for the given `idx` with |
| 136 | * the event number `val` |
| 137 | */ |
| 138 | void amu_group1_set_evtype(unsigned int idx, unsigned int val) |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 139 | { |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 140 | assert(amu_supported()); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 141 | assert(amu_group1_supported()); |
| 142 | assert(idx < AMU_GROUP1_NR_COUNTERS); |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 143 | |
| 144 | amu_group1_set_evtype_internal(idx, val); |
| 145 | isb(); |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 146 | } |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 147 | #endif /* AMU_GROUP1_NR_COUNTERS */ |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 148 | |
| 149 | static void *amu_context_save(const void *arg) |
| 150 | { |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 151 | struct amu_ctx *ctx = &amu_ctxs[plat_my_core_pos()]; |
| 152 | unsigned int i; |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 153 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 154 | if (!amu_supported()) { |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 155 | return (void *)-1; |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 156 | } |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 157 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 158 | #if AMU_GROUP1_NR_COUNTERS |
| 159 | if (!amu_group1_supported()) { |
| 160 | return (void *)-1; |
| 161 | } |
| 162 | #endif |
| 163 | /* Assert that group 0/1 counter configuration is what we expect */ |
| 164 | assert(read_amcntenset0_el0() == AMU_GROUP0_COUNTERS_MASK); |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 165 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 166 | #if AMU_GROUP1_NR_COUNTERS |
| 167 | assert(read_amcntenset1_el0() == AMU_GROUP1_COUNTERS_MASK); |
| 168 | #endif |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 169 | /* |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 170 | * Disable group 0/1 counters to avoid other observers like SCP sampling |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 171 | * counter values from the future via the memory mapped view. |
| 172 | */ |
| 173 | write_amcntenclr0(AMU_GROUP0_COUNTERS_MASK); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 174 | |
| 175 | #if AMU_GROUP1_NR_COUNTERS |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 176 | write_amcntenclr1(AMU_GROUP1_COUNTERS_MASK); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 177 | #endif |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 178 | isb(); |
| 179 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 180 | /* Save all group 0 counters */ |
| 181 | for (i = 0U; i < AMU_GROUP0_NR_COUNTERS; i++) { |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 182 | ctx->group0_cnts[i] = amu_group0_cnt_read(i); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 183 | } |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 184 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 185 | #if AMU_GROUP1_NR_COUNTERS |
| 186 | /* Save group 1 counters */ |
| 187 | for (i = 0U; i < AMU_GROUP1_NR_COUNTERS; i++) { |
| 188 | if ((AMU_GROUP1_COUNTERS_MASK & (1U << i)) != 0U) { |
| 189 | ctx->group1_cnts[i] = amu_group1_cnt_read(i); |
| 190 | } |
| 191 | } |
| 192 | #endif |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 193 | return (void *)0; |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | static void *amu_context_restore(const void *arg) |
| 197 | { |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 198 | struct amu_ctx *ctx = &amu_ctxs[plat_my_core_pos()]; |
| 199 | unsigned int i; |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 200 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 201 | if (!amu_supported()) { |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 202 | return (void *)-1; |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 203 | } |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 204 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 205 | #if AMU_GROUP1_NR_COUNTERS |
| 206 | if (!amu_group1_supported()) { |
| 207 | return (void *)-1; |
| 208 | } |
| 209 | #endif |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 210 | /* Counters were disabled in `amu_context_save()` */ |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 211 | assert(read_amcntenset0_el0() == 0U); |
| 212 | |
| 213 | #if AMU_GROUP1_NR_COUNTERS |
| 214 | assert(read_amcntenset1_el0() == 0U); |
| 215 | #endif |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 216 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 217 | /* Restore all group 0 counters */ |
| 218 | for (i = 0U; i < AMU_GROUP0_NR_COUNTERS; i++) { |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 219 | amu_group0_cnt_write(i, ctx->group0_cnts[i]); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 220 | } |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 221 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 222 | /* Restore group 0 counter configuration */ |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 223 | write_amcntenset0(AMU_GROUP0_COUNTERS_MASK); |
| 224 | |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 225 | #if AMU_GROUP1_NR_COUNTERS |
| 226 | /* Restore group 1 counters */ |
| 227 | for (i = 0U; i < AMU_GROUP1_NR_COUNTERS; i++) { |
| 228 | if ((AMU_GROUP1_COUNTERS_MASK & (1U << i)) != 0U) { |
| 229 | amu_group1_cnt_write(i, ctx->group1_cnts[i]); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | /* Restore group 1 counter configuration */ |
Joel Hutton | 0dcdd8d | 2017-12-21 15:21:20 +0000 | [diff] [blame] | 234 | write_amcntenset1(AMU_GROUP1_COUNTERS_MASK); |
Alexei Fedorov | 7e6306b | 2020-07-14 08:17:56 +0100 | [diff] [blame] | 235 | #endif |
| 236 | |
Antonio Nino Diaz | 033b4bb | 2018-10-25 16:52:26 +0100 | [diff] [blame] | 237 | return (void *)0; |
Dimitris Papastamos | dda48b0 | 2017-10-17 14:03:14 +0100 | [diff] [blame] | 238 | } |
Dimitris Papastamos | eaf3e6d | 2017-11-28 13:47:06 +0000 | [diff] [blame] | 239 | |
| 240 | SUBSCRIBE_TO_EVENT(psci_suspend_pwrdown_start, amu_context_save); |
| 241 | SUBSCRIBE_TO_EVENT(psci_suspend_pwrdown_finish, amu_context_restore); |