Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 1 | /* |
| 2 | * intel_idle.c - native hardware idle loop for modern Intel processors |
| 3 | * |
Len Brown | fab04b2 | 2013-11-09 00:30:17 -0500 | [diff] [blame] | 4 | * Copyright (c) 2013, Intel Corporation. |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 5 | * Len Brown <len.brown@intel.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms and conditions of the GNU General Public License, |
| 9 | * version 2, as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | * intel_idle is a cpuidle driver that loads on specific Intel processors |
| 23 | * in lieu of the legacy ACPI processor_idle driver. The intent is to |
| 24 | * make Linux more efficient on these processors, as intel_idle knows |
| 25 | * more than ACPI, as well as make Linux more immune to ACPI BIOS bugs. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * Design Assumptions |
| 30 | * |
| 31 | * All CPUs have same idle states as boot CPU |
| 32 | * |
| 33 | * Chipset BM_STS (bus master status) bit is a NOP |
| 34 | * for preventing entry into deep C-stats |
| 35 | */ |
| 36 | |
| 37 | /* |
| 38 | * Known limitations |
| 39 | * |
| 40 | * The driver currently initializes for_each_online_cpu() upon modprobe. |
| 41 | * It it unaware of subsequent processors hot-added to the system. |
| 42 | * This means that if you boot with maxcpus=n and later online |
| 43 | * processors above n, those processors will use C1 only. |
| 44 | * |
| 45 | * ACPI has a .suspend hack to turn off deep c-statees during suspend |
| 46 | * to avoid complications with the lapic timer workaround. |
| 47 | * Have not seen issues with suspend, but may need same workaround here. |
| 48 | * |
| 49 | * There is currently no kernel-based automatic probing/loading mechanism |
| 50 | * if the driver is built as a module. |
| 51 | */ |
| 52 | |
| 53 | /* un-comment DEBUG to enable pr_debug() statements */ |
| 54 | #define DEBUG |
| 55 | |
| 56 | #include <linux/kernel.h> |
| 57 | #include <linux/cpuidle.h> |
| 58 | #include <linux/clockchips.h> |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 59 | #include <trace/events/power.h> |
| 60 | #include <linux/sched.h> |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 61 | #include <linux/notifier.h> |
| 62 | #include <linux/cpu.h> |
Paul Gortmaker | 7c52d55 | 2011-05-27 12:33:10 -0400 | [diff] [blame] | 63 | #include <linux/module.h> |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 64 | #include <asm/cpu_device_id.h> |
H. Peter Anvin | bc83ccc | 2010-09-17 15:36:40 -0700 | [diff] [blame] | 65 | #include <asm/mwait.h> |
Len Brown | 14796fc | 2011-01-18 20:48:27 -0500 | [diff] [blame] | 66 | #include <asm/msr.h> |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 67 | |
| 68 | #define INTEL_IDLE_VERSION "0.4" |
| 69 | #define PREFIX "intel_idle: " |
| 70 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 71 | static struct cpuidle_driver intel_idle_driver = { |
| 72 | .name = "intel_idle", |
| 73 | .owner = THIS_MODULE, |
| 74 | }; |
| 75 | /* intel_idle.max_cstate=0 disables driver */ |
Len Brown | 137ecc7 | 2013-02-01 21:35:35 -0500 | [diff] [blame] | 76 | static int max_cstate = CPUIDLE_STATE_MAX - 1; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 77 | |
Len Brown | c423628 | 2010-05-28 02:22:03 -0400 | [diff] [blame] | 78 | static unsigned int mwait_substates; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 79 | |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 80 | #define LAPIC_TIMER_ALWAYS_RELIABLE 0xFFFFFFFF |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 81 | /* Reliable LAPIC Timer States, bit 1 for C1 etc. */ |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 82 | static unsigned int lapic_timer_reliable_states = (1 << 1); /* Default to only C1 */ |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 83 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 84 | struct idle_cpu { |
| 85 | struct cpuidle_state *state_table; |
| 86 | |
| 87 | /* |
| 88 | * Hardware C-state auto-demotion may not always be optimal. |
| 89 | * Indicate which enable bits to clear here. |
| 90 | */ |
| 91 | unsigned long auto_demotion_disable_flags; |
Len Brown | 8c058d53 | 2014-07-31 15:21:24 -0400 | [diff] [blame] | 92 | bool byt_auto_demotion_disable_flag; |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 93 | bool disable_promotion_to_c1e; |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | static const struct idle_cpu *icpu; |
Namhyung Kim | 3265eba | 2010-08-08 03:10:03 +0900 | [diff] [blame] | 97 | static struct cpuidle_device __percpu *intel_idle_cpuidle_devices; |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 98 | static int intel_idle(struct cpuidle_device *dev, |
| 99 | struct cpuidle_driver *drv, int index); |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 100 | static int intel_idle_cpu_init(int cpu); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 101 | |
| 102 | static struct cpuidle_state *cpuidle_state_table; |
| 103 | |
| 104 | /* |
Len Brown | 956d033 | 2011-01-12 02:51:20 -0500 | [diff] [blame] | 105 | * Set this flag for states where the HW flushes the TLB for us |
| 106 | * and so we don't need cross-calls to keep it consistent. |
| 107 | * If this flag is set, SW flushes the TLB, so even if the |
| 108 | * HW doesn't do the flushing, this flag is safe to use. |
| 109 | */ |
| 110 | #define CPUIDLE_FLAG_TLB_FLUSHED 0x10000 |
| 111 | |
| 112 | /* |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 113 | * MWAIT takes an 8-bit "hint" in EAX "suggesting" |
| 114 | * the C-state (top nibble) and sub-state (bottom nibble) |
| 115 | * 0x00 means "MWAIT(C1)", 0x10 means "MWAIT(C2)" etc. |
| 116 | * |
| 117 | * We store the hint at the top of our "flags" for each state. |
| 118 | */ |
| 119 | #define flg2MWAIT(flags) (((flags) >> 24) & 0xFF) |
| 120 | #define MWAIT2flg(eax) ((eax & 0xFF) << 24) |
| 121 | |
| 122 | /* |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 123 | * States are indexed by the cstate number, |
| 124 | * which is also the index into the MWAIT hint array. |
| 125 | * Thus C0 is a dummy. |
| 126 | */ |
Jiang Liu | ba0dc81 | 2014-01-09 15:30:26 +0800 | [diff] [blame] | 127 | static struct cpuidle_state nehalem_cstates[] = { |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 128 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 129 | .name = "C1-NHM", |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 130 | .desc = "MWAIT 0x00", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 131 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 132 | .exit_latency = 3, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 133 | .target_residency = 6, |
| 134 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 135 | { |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 136 | .name = "C1E-NHM", |
| 137 | .desc = "MWAIT 0x01", |
| 138 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 139 | .exit_latency = 10, |
| 140 | .target_residency = 20, |
| 141 | .enter = &intel_idle }, |
| 142 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 143 | .name = "C3-NHM", |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 144 | .desc = "MWAIT 0x10", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 145 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 146 | .exit_latency = 20, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 147 | .target_residency = 80, |
| 148 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 149 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 150 | .name = "C6-NHM", |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 151 | .desc = "MWAIT 0x20", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 152 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 153 | .exit_latency = 200, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 154 | .target_residency = 800, |
| 155 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 156 | { |
| 157 | .enter = NULL } |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 158 | }; |
| 159 | |
Jiang Liu | ba0dc81 | 2014-01-09 15:30:26 +0800 | [diff] [blame] | 160 | static struct cpuidle_state snb_cstates[] = { |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 161 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 162 | .name = "C1-SNB", |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 163 | .desc = "MWAIT 0x00", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 164 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 165 | .exit_latency = 2, |
| 166 | .target_residency = 2, |
| 167 | .enter = &intel_idle }, |
| 168 | { |
| 169 | .name = "C1E-SNB", |
| 170 | .desc = "MWAIT 0x01", |
| 171 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 172 | .exit_latency = 10, |
| 173 | .target_residency = 20, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 174 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 175 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 176 | .name = "C3-SNB", |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 177 | .desc = "MWAIT 0x10", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 178 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 179 | .exit_latency = 80, |
Len Brown | ddbd550 | 2010-12-13 18:28:22 -0500 | [diff] [blame] | 180 | .target_residency = 211, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 181 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 182 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 183 | .name = "C6-SNB", |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 184 | .desc = "MWAIT 0x20", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 185 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 186 | .exit_latency = 104, |
Len Brown | ddbd550 | 2010-12-13 18:28:22 -0500 | [diff] [blame] | 187 | .target_residency = 345, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 188 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 189 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 190 | .name = "C7-SNB", |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 191 | .desc = "MWAIT 0x30", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 192 | .flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 193 | .exit_latency = 109, |
Len Brown | ddbd550 | 2010-12-13 18:28:22 -0500 | [diff] [blame] | 194 | .target_residency = 345, |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 195 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 196 | { |
| 197 | .enter = NULL } |
Len Brown | d13780d | 2010-07-07 00:12:03 -0400 | [diff] [blame] | 198 | }; |
| 199 | |
Len Brown | 718987d | 2014-02-14 02:30:00 -0500 | [diff] [blame] | 200 | static struct cpuidle_state byt_cstates[] = { |
| 201 | { |
| 202 | .name = "C1-BYT", |
| 203 | .desc = "MWAIT 0x00", |
| 204 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 205 | .exit_latency = 1, |
| 206 | .target_residency = 1, |
| 207 | .enter = &intel_idle }, |
| 208 | { |
| 209 | .name = "C1E-BYT", |
| 210 | .desc = "MWAIT 0x01", |
| 211 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 212 | .exit_latency = 15, |
| 213 | .target_residency = 30, |
| 214 | .enter = &intel_idle }, |
| 215 | { |
| 216 | .name = "C6N-BYT", |
| 217 | .desc = "MWAIT 0x58", |
| 218 | .flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 219 | .exit_latency = 40, |
| 220 | .target_residency = 275, |
| 221 | .enter = &intel_idle }, |
| 222 | { |
| 223 | .name = "C6S-BYT", |
| 224 | .desc = "MWAIT 0x52", |
| 225 | .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 226 | .exit_latency = 140, |
| 227 | .target_residency = 560, |
| 228 | .enter = &intel_idle }, |
| 229 | { |
| 230 | .name = "C7-BYT", |
| 231 | .desc = "MWAIT 0x60", |
| 232 | .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 233 | .exit_latency = 1200, |
| 234 | .target_residency = 1500, |
| 235 | .enter = &intel_idle }, |
| 236 | { |
| 237 | .name = "C7S-BYT", |
| 238 | .desc = "MWAIT 0x64", |
| 239 | .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 240 | .exit_latency = 10000, |
| 241 | .target_residency = 20000, |
| 242 | .enter = &intel_idle }, |
| 243 | { |
| 244 | .enter = NULL } |
| 245 | }; |
| 246 | |
Jiang Liu | ba0dc81 | 2014-01-09 15:30:26 +0800 | [diff] [blame] | 247 | static struct cpuidle_state ivb_cstates[] = { |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 248 | { |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 249 | .name = "C1-IVB", |
| 250 | .desc = "MWAIT 0x00", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 251 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 252 | .exit_latency = 1, |
| 253 | .target_residency = 1, |
| 254 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 255 | { |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 256 | .name = "C1E-IVB", |
| 257 | .desc = "MWAIT 0x01", |
| 258 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 259 | .exit_latency = 10, |
| 260 | .target_residency = 20, |
| 261 | .enter = &intel_idle }, |
| 262 | { |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 263 | .name = "C3-IVB", |
| 264 | .desc = "MWAIT 0x10", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 265 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 266 | .exit_latency = 59, |
| 267 | .target_residency = 156, |
| 268 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 269 | { |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 270 | .name = "C6-IVB", |
| 271 | .desc = "MWAIT 0x20", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 272 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 273 | .exit_latency = 80, |
| 274 | .target_residency = 300, |
| 275 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 276 | { |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 277 | .name = "C7-IVB", |
| 278 | .desc = "MWAIT 0x30", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 279 | .flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 280 | .exit_latency = 87, |
| 281 | .target_residency = 300, |
| 282 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 283 | { |
| 284 | .enter = NULL } |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 285 | }; |
| 286 | |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 287 | static struct cpuidle_state ivt_cstates[] = { |
| 288 | { |
| 289 | .name = "C1-IVT", |
| 290 | .desc = "MWAIT 0x00", |
| 291 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 292 | .exit_latency = 1, |
| 293 | .target_residency = 1, |
| 294 | .enter = &intel_idle }, |
| 295 | { |
| 296 | .name = "C1E-IVT", |
| 297 | .desc = "MWAIT 0x01", |
| 298 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 299 | .exit_latency = 10, |
| 300 | .target_residency = 80, |
| 301 | .enter = &intel_idle }, |
| 302 | { |
| 303 | .name = "C3-IVT", |
| 304 | .desc = "MWAIT 0x10", |
| 305 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 306 | .exit_latency = 59, |
| 307 | .target_residency = 156, |
| 308 | .enter = &intel_idle }, |
| 309 | { |
| 310 | .name = "C6-IVT", |
| 311 | .desc = "MWAIT 0x20", |
| 312 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 313 | .exit_latency = 82, |
| 314 | .target_residency = 300, |
| 315 | .enter = &intel_idle }, |
| 316 | { |
| 317 | .enter = NULL } |
| 318 | }; |
| 319 | |
| 320 | static struct cpuidle_state ivt_cstates_4s[] = { |
| 321 | { |
| 322 | .name = "C1-IVT-4S", |
| 323 | .desc = "MWAIT 0x00", |
| 324 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 325 | .exit_latency = 1, |
| 326 | .target_residency = 1, |
| 327 | .enter = &intel_idle }, |
| 328 | { |
| 329 | .name = "C1E-IVT-4S", |
| 330 | .desc = "MWAIT 0x01", |
| 331 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 332 | .exit_latency = 10, |
| 333 | .target_residency = 250, |
| 334 | .enter = &intel_idle }, |
| 335 | { |
| 336 | .name = "C3-IVT-4S", |
| 337 | .desc = "MWAIT 0x10", |
| 338 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 339 | .exit_latency = 59, |
| 340 | .target_residency = 300, |
| 341 | .enter = &intel_idle }, |
| 342 | { |
| 343 | .name = "C6-IVT-4S", |
| 344 | .desc = "MWAIT 0x20", |
| 345 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 346 | .exit_latency = 84, |
| 347 | .target_residency = 400, |
| 348 | .enter = &intel_idle }, |
| 349 | { |
| 350 | .enter = NULL } |
| 351 | }; |
| 352 | |
| 353 | static struct cpuidle_state ivt_cstates_8s[] = { |
| 354 | { |
| 355 | .name = "C1-IVT-8S", |
| 356 | .desc = "MWAIT 0x00", |
| 357 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 358 | .exit_latency = 1, |
| 359 | .target_residency = 1, |
| 360 | .enter = &intel_idle }, |
| 361 | { |
| 362 | .name = "C1E-IVT-8S", |
| 363 | .desc = "MWAIT 0x01", |
| 364 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 365 | .exit_latency = 10, |
| 366 | .target_residency = 500, |
| 367 | .enter = &intel_idle }, |
| 368 | { |
| 369 | .name = "C3-IVT-8S", |
| 370 | .desc = "MWAIT 0x10", |
| 371 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 372 | .exit_latency = 59, |
| 373 | .target_residency = 600, |
| 374 | .enter = &intel_idle }, |
| 375 | { |
| 376 | .name = "C6-IVT-8S", |
| 377 | .desc = "MWAIT 0x20", |
| 378 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 379 | .exit_latency = 88, |
| 380 | .target_residency = 700, |
| 381 | .enter = &intel_idle }, |
| 382 | { |
| 383 | .enter = NULL } |
| 384 | }; |
| 385 | |
Jiang Liu | ba0dc81 | 2014-01-09 15:30:26 +0800 | [diff] [blame] | 386 | static struct cpuidle_state hsw_cstates[] = { |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 387 | { |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 388 | .name = "C1-HSW", |
| 389 | .desc = "MWAIT 0x00", |
| 390 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 391 | .exit_latency = 2, |
| 392 | .target_residency = 2, |
| 393 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 394 | { |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 395 | .name = "C1E-HSW", |
| 396 | .desc = "MWAIT 0x01", |
| 397 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 398 | .exit_latency = 10, |
| 399 | .target_residency = 20, |
| 400 | .enter = &intel_idle }, |
| 401 | { |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 402 | .name = "C3-HSW", |
| 403 | .desc = "MWAIT 0x10", |
| 404 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 405 | .exit_latency = 33, |
| 406 | .target_residency = 100, |
| 407 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 408 | { |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 409 | .name = "C6-HSW", |
| 410 | .desc = "MWAIT 0x20", |
| 411 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 412 | .exit_latency = 133, |
| 413 | .target_residency = 400, |
| 414 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 415 | { |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 416 | .name = "C7s-HSW", |
| 417 | .desc = "MWAIT 0x32", |
| 418 | .flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 419 | .exit_latency = 166, |
| 420 | .target_residency = 500, |
| 421 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 422 | { |
Len Brown | 86239ce | 2013-02-27 13:18:50 -0500 | [diff] [blame] | 423 | .name = "C8-HSW", |
| 424 | .desc = "MWAIT 0x40", |
| 425 | .flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 426 | .exit_latency = 300, |
| 427 | .target_residency = 900, |
| 428 | .enter = &intel_idle }, |
| 429 | { |
| 430 | .name = "C9-HSW", |
| 431 | .desc = "MWAIT 0x50", |
| 432 | .flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 433 | .exit_latency = 600, |
| 434 | .target_residency = 1800, |
| 435 | .enter = &intel_idle }, |
| 436 | { |
| 437 | .name = "C10-HSW", |
| 438 | .desc = "MWAIT 0x60", |
| 439 | .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 440 | .exit_latency = 2600, |
| 441 | .target_residency = 7700, |
| 442 | .enter = &intel_idle }, |
| 443 | { |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 444 | .enter = NULL } |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 445 | }; |
Len Brown | a138b56 | 2014-02-04 23:56:40 -0500 | [diff] [blame] | 446 | static struct cpuidle_state bdw_cstates[] = { |
| 447 | { |
| 448 | .name = "C1-BDW", |
| 449 | .desc = "MWAIT 0x00", |
| 450 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 451 | .exit_latency = 2, |
| 452 | .target_residency = 2, |
| 453 | .enter = &intel_idle }, |
| 454 | { |
| 455 | .name = "C1E-BDW", |
| 456 | .desc = "MWAIT 0x01", |
| 457 | .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID, |
| 458 | .exit_latency = 10, |
| 459 | .target_residency = 20, |
| 460 | .enter = &intel_idle }, |
| 461 | { |
| 462 | .name = "C3-BDW", |
| 463 | .desc = "MWAIT 0x10", |
| 464 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 465 | .exit_latency = 40, |
| 466 | .target_residency = 100, |
| 467 | .enter = &intel_idle }, |
| 468 | { |
| 469 | .name = "C6-BDW", |
| 470 | .desc = "MWAIT 0x20", |
| 471 | .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 472 | .exit_latency = 133, |
| 473 | .target_residency = 400, |
| 474 | .enter = &intel_idle }, |
| 475 | { |
| 476 | .name = "C7s-BDW", |
| 477 | .desc = "MWAIT 0x32", |
| 478 | .flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 479 | .exit_latency = 166, |
| 480 | .target_residency = 500, |
| 481 | .enter = &intel_idle }, |
| 482 | { |
| 483 | .name = "C8-BDW", |
| 484 | .desc = "MWAIT 0x40", |
| 485 | .flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 486 | .exit_latency = 300, |
| 487 | .target_residency = 900, |
| 488 | .enter = &intel_idle }, |
| 489 | { |
| 490 | .name = "C9-BDW", |
| 491 | .desc = "MWAIT 0x50", |
| 492 | .flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 493 | .exit_latency = 600, |
| 494 | .target_residency = 1800, |
| 495 | .enter = &intel_idle }, |
| 496 | { |
| 497 | .name = "C10-BDW", |
| 498 | .desc = "MWAIT 0x60", |
| 499 | .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
| 500 | .exit_latency = 2600, |
| 501 | .target_residency = 7700, |
| 502 | .enter = &intel_idle }, |
| 503 | { |
| 504 | .enter = NULL } |
| 505 | }; |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 506 | |
Jiang Liu | ba0dc81 | 2014-01-09 15:30:26 +0800 | [diff] [blame] | 507 | static struct cpuidle_state atom_cstates[] = { |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 508 | { |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 509 | .name = "C1E-ATM", |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 510 | .desc = "MWAIT 0x00", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 511 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 512 | .exit_latency = 10, |
| 513 | .target_residency = 20, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 514 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 515 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 516 | .name = "C2-ATM", |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 517 | .desc = "MWAIT 0x10", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 518 | .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TIME_VALID, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 519 | .exit_latency = 20, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 520 | .target_residency = 80, |
| 521 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 522 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 523 | .name = "C4-ATM", |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 524 | .desc = "MWAIT 0x30", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 525 | .flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 526 | .exit_latency = 100, |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 527 | .target_residency = 400, |
| 528 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 529 | { |
Thomas Renninger | 15e123e | 2011-02-27 22:36:43 +0100 | [diff] [blame] | 530 | .name = "C6-ATM", |
Len Brown | 7fcca7d | 2010-10-05 13:43:14 -0400 | [diff] [blame] | 531 | .desc = "MWAIT 0x52", |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 532 | .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | 7fcca7d | 2010-10-05 13:43:14 -0400 | [diff] [blame] | 533 | .exit_latency = 140, |
Len Brown | 7fcca7d | 2010-10-05 13:43:14 -0400 | [diff] [blame] | 534 | .target_residency = 560, |
| 535 | .enter = &intel_idle }, |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 536 | { |
| 537 | .enter = NULL } |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 538 | }; |
Jiang Liu | 8839099 | 2014-01-09 15:30:27 +0800 | [diff] [blame] | 539 | static struct cpuidle_state avn_cstates[] = { |
Len Brown | fab04b2 | 2013-11-09 00:30:17 -0500 | [diff] [blame] | 540 | { |
| 541 | .name = "C1-AVN", |
| 542 | .desc = "MWAIT 0x00", |
| 543 | .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID, |
| 544 | .exit_latency = 2, |
| 545 | .target_residency = 2, |
| 546 | .enter = &intel_idle }, |
| 547 | { |
| 548 | .name = "C6-AVN", |
| 549 | .desc = "MWAIT 0x51", |
Bockholdt Arne | 22e580d | 2013-11-26 07:13:57 +0000 | [diff] [blame] | 550 | .flags = MWAIT2flg(0x51) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, |
Len Brown | fab04b2 | 2013-11-09 00:30:17 -0500 | [diff] [blame] | 551 | .exit_latency = 15, |
| 552 | .target_residency = 45, |
| 553 | .enter = &intel_idle }, |
Jiang Liu | 8839099 | 2014-01-09 15:30:27 +0800 | [diff] [blame] | 554 | { |
| 555 | .enter = NULL } |
Len Brown | fab04b2 | 2013-11-09 00:30:17 -0500 | [diff] [blame] | 556 | }; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 557 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 558 | /** |
| 559 | * intel_idle |
| 560 | * @dev: cpuidle_device |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 561 | * @drv: cpuidle driver |
Deepthi Dharwar | e978aa7 | 2011-10-28 16:20:09 +0530 | [diff] [blame] | 562 | * @index: index of cpuidle state |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 563 | * |
Yanmin Zhang | 63ff07b | 2012-01-10 15:48:21 -0800 | [diff] [blame] | 564 | * Must be called under local_irq_disable(). |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 565 | */ |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 566 | static int intel_idle(struct cpuidle_device *dev, |
| 567 | struct cpuidle_driver *drv, int index) |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 568 | { |
| 569 | unsigned long ecx = 1; /* break on interrupt flag */ |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 570 | struct cpuidle_state *state = &drv->states[index]; |
Len Brown | b1beab4 | 2013-01-31 19:55:37 -0500 | [diff] [blame] | 571 | unsigned long eax = flg2MWAIT(state->flags); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 572 | unsigned int cstate; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 573 | int cpu = smp_processor_id(); |
| 574 | |
| 575 | cstate = (((eax) >> MWAIT_SUBSTATE_SIZE) & MWAIT_CSTATE_MASK) + 1; |
| 576 | |
Suresh Siddha | 6110a1f | 2010-09-30 21:19:07 -0400 | [diff] [blame] | 577 | /* |
Len Brown | c8381cc | 2010-10-15 20:43:06 -0400 | [diff] [blame] | 578 | * leave_mm() to avoid costly and often unnecessary wakeups |
| 579 | * for flushing the user TLB's associated with the active mm. |
Suresh Siddha | 6110a1f | 2010-09-30 21:19:07 -0400 | [diff] [blame] | 580 | */ |
Len Brown | c8381cc | 2010-10-15 20:43:06 -0400 | [diff] [blame] | 581 | if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED) |
Suresh Siddha | 6110a1f | 2010-09-30 21:19:07 -0400 | [diff] [blame] | 582 | leave_mm(cpu); |
| 583 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 584 | if (!(lapic_timer_reliable_states & (1 << (cstate)))) |
| 585 | clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu); |
| 586 | |
Peter Zijlstra | 1682425 | 2013-12-12 15:08:36 +0100 | [diff] [blame] | 587 | mwait_idle_with_hints(eax, ecx); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 588 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 589 | if (!(lapic_timer_reliable_states & (1 << (cstate)))) |
| 590 | clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu); |
| 591 | |
Deepthi Dharwar | e978aa7 | 2011-10-28 16:20:09 +0530 | [diff] [blame] | 592 | return index; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 593 | } |
| 594 | |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 595 | static void __setup_broadcast_timer(void *arg) |
| 596 | { |
| 597 | unsigned long reason = (unsigned long)arg; |
| 598 | int cpu = smp_processor_id(); |
| 599 | |
| 600 | reason = reason ? |
| 601 | CLOCK_EVT_NOTIFY_BROADCAST_ON : CLOCK_EVT_NOTIFY_BROADCAST_OFF; |
| 602 | |
| 603 | clockevents_notify(reason, &cpu); |
| 604 | } |
| 605 | |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 606 | static int cpu_hotplug_notify(struct notifier_block *n, |
| 607 | unsigned long action, void *hcpu) |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 608 | { |
| 609 | int hotcpu = (unsigned long)hcpu; |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 610 | struct cpuidle_device *dev; |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 611 | |
Prarit Bhargava | e240145 | 2013-10-23 09:44:51 -0400 | [diff] [blame] | 612 | switch (action & ~CPU_TASKS_FROZEN) { |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 613 | case CPU_ONLINE: |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 614 | |
| 615 | if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE) |
| 616 | smp_call_function_single(hotcpu, __setup_broadcast_timer, |
| 617 | (void *)true, 1); |
| 618 | |
| 619 | /* |
| 620 | * Some systems can hotplug a cpu at runtime after |
| 621 | * the kernel has booted, we have to initialize the |
| 622 | * driver in this case |
| 623 | */ |
| 624 | dev = per_cpu_ptr(intel_idle_cpuidle_devices, hotcpu); |
| 625 | if (!dev->registered) |
| 626 | intel_idle_cpu_init(hotcpu); |
| 627 | |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 628 | break; |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 629 | } |
| 630 | return NOTIFY_OK; |
| 631 | } |
| 632 | |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 633 | static struct notifier_block cpu_hotplug_notifier = { |
| 634 | .notifier_call = cpu_hotplug_notify, |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 635 | }; |
| 636 | |
Len Brown | 14796fc | 2011-01-18 20:48:27 -0500 | [diff] [blame] | 637 | static void auto_demotion_disable(void *dummy) |
| 638 | { |
| 639 | unsigned long long msr_bits; |
| 640 | |
| 641 | rdmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits); |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 642 | msr_bits &= ~(icpu->auto_demotion_disable_flags); |
Len Brown | 14796fc | 2011-01-18 20:48:27 -0500 | [diff] [blame] | 643 | wrmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits); |
| 644 | } |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 645 | static void c1e_promotion_disable(void *dummy) |
| 646 | { |
| 647 | unsigned long long msr_bits; |
| 648 | |
| 649 | rdmsrl(MSR_IA32_POWER_CTL, msr_bits); |
| 650 | msr_bits &= ~0x2; |
| 651 | wrmsrl(MSR_IA32_POWER_CTL, msr_bits); |
| 652 | } |
Len Brown | 14796fc | 2011-01-18 20:48:27 -0500 | [diff] [blame] | 653 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 654 | static const struct idle_cpu idle_cpu_nehalem = { |
| 655 | .state_table = nehalem_cstates, |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 656 | .auto_demotion_disable_flags = NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE, |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 657 | .disable_promotion_to_c1e = true, |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 658 | }; |
| 659 | |
| 660 | static const struct idle_cpu idle_cpu_atom = { |
| 661 | .state_table = atom_cstates, |
| 662 | }; |
| 663 | |
| 664 | static const struct idle_cpu idle_cpu_lincroft = { |
| 665 | .state_table = atom_cstates, |
| 666 | .auto_demotion_disable_flags = ATM_LNC_C6_AUTO_DEMOTE, |
| 667 | }; |
| 668 | |
| 669 | static const struct idle_cpu idle_cpu_snb = { |
| 670 | .state_table = snb_cstates, |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 671 | .disable_promotion_to_c1e = true, |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 672 | }; |
| 673 | |
Len Brown | 718987d | 2014-02-14 02:30:00 -0500 | [diff] [blame] | 674 | static const struct idle_cpu idle_cpu_byt = { |
| 675 | .state_table = byt_cstates, |
| 676 | .disable_promotion_to_c1e = true, |
Len Brown | 8c058d53 | 2014-07-31 15:21:24 -0400 | [diff] [blame] | 677 | .byt_auto_demotion_disable_flag = true, |
Len Brown | 718987d | 2014-02-14 02:30:00 -0500 | [diff] [blame] | 678 | }; |
| 679 | |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 680 | static const struct idle_cpu idle_cpu_ivb = { |
| 681 | .state_table = ivb_cstates, |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 682 | .disable_promotion_to_c1e = true, |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 683 | }; |
| 684 | |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 685 | static const struct idle_cpu idle_cpu_ivt = { |
| 686 | .state_table = ivt_cstates, |
| 687 | .disable_promotion_to_c1e = true, |
| 688 | }; |
| 689 | |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 690 | static const struct idle_cpu idle_cpu_hsw = { |
| 691 | .state_table = hsw_cstates, |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 692 | .disable_promotion_to_c1e = true, |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 693 | }; |
| 694 | |
Len Brown | a138b56 | 2014-02-04 23:56:40 -0500 | [diff] [blame] | 695 | static const struct idle_cpu idle_cpu_bdw = { |
| 696 | .state_table = bdw_cstates, |
| 697 | .disable_promotion_to_c1e = true, |
| 698 | }; |
| 699 | |
Len Brown | fab04b2 | 2013-11-09 00:30:17 -0500 | [diff] [blame] | 700 | static const struct idle_cpu idle_cpu_avn = { |
| 701 | .state_table = avn_cstates, |
| 702 | .disable_promotion_to_c1e = true, |
| 703 | }; |
| 704 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 705 | #define ICPU(model, cpu) \ |
| 706 | { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu } |
| 707 | |
| 708 | static const struct x86_cpu_id intel_idle_ids[] = { |
| 709 | ICPU(0x1a, idle_cpu_nehalem), |
| 710 | ICPU(0x1e, idle_cpu_nehalem), |
| 711 | ICPU(0x1f, idle_cpu_nehalem), |
Ben Hutchings | 8bf1193 | 2012-02-16 04:13:14 +0000 | [diff] [blame] | 712 | ICPU(0x25, idle_cpu_nehalem), |
| 713 | ICPU(0x2c, idle_cpu_nehalem), |
| 714 | ICPU(0x2e, idle_cpu_nehalem), |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 715 | ICPU(0x1c, idle_cpu_atom), |
| 716 | ICPU(0x26, idle_cpu_lincroft), |
Ben Hutchings | 8bf1193 | 2012-02-16 04:13:14 +0000 | [diff] [blame] | 717 | ICPU(0x2f, idle_cpu_nehalem), |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 718 | ICPU(0x2a, idle_cpu_snb), |
| 719 | ICPU(0x2d, idle_cpu_snb), |
Jan Kiszka | acead1b | 2014-01-25 22:24:22 +0100 | [diff] [blame] | 720 | ICPU(0x36, idle_cpu_atom), |
Len Brown | 718987d | 2014-02-14 02:30:00 -0500 | [diff] [blame] | 721 | ICPU(0x37, idle_cpu_byt), |
Len Brown | 6edab08 | 2012-06-01 19:45:32 -0400 | [diff] [blame] | 722 | ICPU(0x3a, idle_cpu_ivb), |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 723 | ICPU(0x3e, idle_cpu_ivt), |
Len Brown | 85a4d2d | 2013-01-31 14:40:49 -0500 | [diff] [blame] | 724 | ICPU(0x3c, idle_cpu_hsw), |
| 725 | ICPU(0x3f, idle_cpu_hsw), |
| 726 | ICPU(0x45, idle_cpu_hsw), |
Len Brown | 0b15841 | 2013-03-15 10:55:31 -0400 | [diff] [blame] | 727 | ICPU(0x46, idle_cpu_hsw), |
Len Brown | a138b56 | 2014-02-04 23:56:40 -0500 | [diff] [blame] | 728 | ICPU(0x4d, idle_cpu_avn), |
| 729 | ICPU(0x3d, idle_cpu_bdw), |
| 730 | ICPU(0x4f, idle_cpu_bdw), |
| 731 | ICPU(0x56, idle_cpu_bdw), |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 732 | {} |
| 733 | }; |
| 734 | MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids); |
| 735 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 736 | /* |
| 737 | * intel_idle_probe() |
| 738 | */ |
Bartlomiej Zolnierkiewicz | 00f3e75 | 2013-08-30 12:27:45 +0200 | [diff] [blame] | 739 | static int __init intel_idle_probe(void) |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 740 | { |
Len Brown | c423628 | 2010-05-28 02:22:03 -0400 | [diff] [blame] | 741 | unsigned int eax, ebx, ecx; |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 742 | const struct x86_cpu_id *id; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 743 | |
| 744 | if (max_cstate == 0) { |
| 745 | pr_debug(PREFIX "disabled\n"); |
| 746 | return -EPERM; |
| 747 | } |
| 748 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 749 | id = x86_match_cpu(intel_idle_ids); |
| 750 | if (!id) { |
| 751 | if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && |
| 752 | boot_cpu_data.x86 == 6) |
| 753 | pr_debug(PREFIX "does not run on family %d model %d\n", |
| 754 | boot_cpu_data.x86, boot_cpu_data.x86_model); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 755 | return -ENODEV; |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 756 | } |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 757 | |
| 758 | if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) |
| 759 | return -ENODEV; |
| 760 | |
Len Brown | c423628 | 2010-05-28 02:22:03 -0400 | [diff] [blame] | 761 | cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 762 | |
| 763 | if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) || |
Thomas Renninger | 5c2a9f0 | 2011-12-04 22:17:29 +0100 | [diff] [blame] | 764 | !(ecx & CPUID5_ECX_INTERRUPT_BREAK) || |
| 765 | !mwait_substates) |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 766 | return -ENODEV; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 767 | |
Len Brown | c423628 | 2010-05-28 02:22:03 -0400 | [diff] [blame] | 768 | pr_debug(PREFIX "MWAIT substates: 0x%x\n", mwait_substates); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 769 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 770 | icpu = (const struct idle_cpu *)id->driver_data; |
| 771 | cpuidle_state_table = icpu->state_table; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 772 | |
Len Brown | 56b9aea | 2010-12-02 01:19:32 -0500 | [diff] [blame] | 773 | if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */ |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 774 | lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE; |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 775 | else |
Shaohua Li | 39a74fd | 2012-01-10 15:48:19 -0800 | [diff] [blame] | 776 | on_each_cpu(__setup_broadcast_timer, (void *)true, 1); |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 777 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 778 | pr_debug(PREFIX "v" INTEL_IDLE_VERSION |
| 779 | " model 0x%X\n", boot_cpu_data.x86_model); |
| 780 | |
| 781 | pr_debug(PREFIX "lapic_timer_reliable_states 0x%x\n", |
| 782 | lapic_timer_reliable_states); |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | /* |
| 787 | * intel_idle_cpuidle_devices_uninit() |
| 788 | * unregister, free cpuidle_devices |
| 789 | */ |
| 790 | static void intel_idle_cpuidle_devices_uninit(void) |
| 791 | { |
| 792 | int i; |
| 793 | struct cpuidle_device *dev; |
| 794 | |
| 795 | for_each_online_cpu(i) { |
| 796 | dev = per_cpu_ptr(intel_idle_cpuidle_devices, i); |
| 797 | cpuidle_unregister_device(dev); |
| 798 | } |
| 799 | |
| 800 | free_percpu(intel_idle_cpuidle_devices); |
| 801 | return; |
| 802 | } |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 803 | |
| 804 | /* |
| 805 | * intel_idle_state_table_update() |
| 806 | * |
| 807 | * Update the default state_table for this CPU-id |
| 808 | * |
| 809 | * Currently used to access tuned IVT multi-socket targets |
| 810 | * Assumption: num_sockets == (max_package_num + 1) |
| 811 | */ |
| 812 | void intel_idle_state_table_update(void) |
| 813 | { |
| 814 | /* IVT uses a different table for 1-2, 3-4, and > 4 sockets */ |
| 815 | if (boot_cpu_data.x86_model == 0x3e) { /* IVT */ |
| 816 | int cpu, package_num, num_sockets = 1; |
| 817 | |
| 818 | for_each_online_cpu(cpu) { |
| 819 | package_num = topology_physical_package_id(cpu); |
| 820 | if (package_num + 1 > num_sockets) { |
| 821 | num_sockets = package_num + 1; |
| 822 | |
Christoph Jaeger | d27dca4 | 2014-04-12 19:57:30 +0200 | [diff] [blame] | 823 | if (num_sockets > 4) { |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 824 | cpuidle_state_table = ivt_cstates_8s; |
| 825 | return; |
Christoph Jaeger | d27dca4 | 2014-04-12 19:57:30 +0200 | [diff] [blame] | 826 | } |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 827 | } |
| 828 | } |
| 829 | |
| 830 | if (num_sockets > 2) |
| 831 | cpuidle_state_table = ivt_cstates_4s; |
| 832 | /* else, 1 and 2 socket systems use default ivt_cstates */ |
| 833 | } |
| 834 | return; |
| 835 | } |
| 836 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 837 | /* |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 838 | * intel_idle_cpuidle_driver_init() |
| 839 | * allocate, initialize cpuidle_states |
| 840 | */ |
Bartlomiej Zolnierkiewicz | 00f3e75 | 2013-08-30 12:27:45 +0200 | [diff] [blame] | 841 | static int __init intel_idle_cpuidle_driver_init(void) |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 842 | { |
| 843 | int cstate; |
| 844 | struct cpuidle_driver *drv = &intel_idle_driver; |
| 845 | |
Len Brown | 0138d8f | 2014-04-04 01:21:07 -0400 | [diff] [blame] | 846 | intel_idle_state_table_update(); |
| 847 | |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 848 | drv->state_count = 1; |
| 849 | |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 850 | for (cstate = 0; cstate < CPUIDLE_STATE_MAX; ++cstate) { |
Len Brown | 24bfa95 | 2014-02-14 00:50:34 -0500 | [diff] [blame] | 851 | int num_substates, mwait_hint, mwait_cstate; |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 852 | |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 853 | if (cpuidle_state_table[cstate].enter == NULL) |
| 854 | break; |
| 855 | |
| 856 | if (cstate + 1 > max_cstate) { |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 857 | printk(PREFIX "max_cstate %d reached\n", |
| 858 | max_cstate); |
| 859 | break; |
| 860 | } |
| 861 | |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 862 | mwait_hint = flg2MWAIT(cpuidle_state_table[cstate].flags); |
| 863 | mwait_cstate = MWAIT_HINT2CSTATE(mwait_hint); |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 864 | |
Len Brown | 24bfa95 | 2014-02-14 00:50:34 -0500 | [diff] [blame] | 865 | /* number of sub-states for this state in CPUID.MWAIT */ |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 866 | num_substates = (mwait_substates >> ((mwait_cstate + 1) * 4)) |
| 867 | & MWAIT_SUBSTATE_MASK; |
| 868 | |
Len Brown | 24bfa95 | 2014-02-14 00:50:34 -0500 | [diff] [blame] | 869 | /* if NO sub-states for this state in CPUID, skip it */ |
| 870 | if (num_substates == 0) |
Len Brown | e022e7e | 2013-02-01 23:37:30 -0500 | [diff] [blame] | 871 | continue; |
| 872 | |
| 873 | if (((mwait_cstate + 1) > 2) && |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 874 | !boot_cpu_has(X86_FEATURE_NONSTOP_TSC)) |
| 875 | mark_tsc_unstable("TSC halts in idle" |
| 876 | " states deeper than C2"); |
| 877 | |
| 878 | drv->states[drv->state_count] = /* structure copy */ |
| 879 | cpuidle_state_table[cstate]; |
| 880 | |
| 881 | drv->state_count += 1; |
| 882 | } |
| 883 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 884 | if (icpu->auto_demotion_disable_flags) |
Shaohua Li | 39a74fd | 2012-01-10 15:48:19 -0800 | [diff] [blame] | 885 | on_each_cpu(auto_demotion_disable, NULL, 1); |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 886 | |
Len Brown | 8c058d53 | 2014-07-31 15:21:24 -0400 | [diff] [blame] | 887 | if (icpu->byt_auto_demotion_disable_flag) { |
| 888 | wrmsrl(MSR_CC6_DEMOTION_POLICY_CONFIG, 0); |
| 889 | wrmsrl(MSR_MC6_DEMOTION_POLICY_CONFIG, 0); |
| 890 | } |
| 891 | |
Len Brown | 32e9518 | 2013-02-02 01:31:56 -0500 | [diff] [blame] | 892 | if (icpu->disable_promotion_to_c1e) /* each-cpu is redundant */ |
| 893 | on_each_cpu(c1e_promotion_disable, NULL, 1); |
| 894 | |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 895 | return 0; |
| 896 | } |
| 897 | |
| 898 | |
| 899 | /* |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 900 | * intel_idle_cpu_init() |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 901 | * allocate, initialize, register cpuidle_devices |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 902 | * @cpu: cpu/core to initialize |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 903 | */ |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 904 | static int intel_idle_cpu_init(int cpu) |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 905 | { |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 906 | struct cpuidle_device *dev; |
| 907 | |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 908 | dev = per_cpu_ptr(intel_idle_cpuidle_devices, cpu); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 909 | |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 910 | dev->cpu = cpu; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 911 | |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 912 | if (cpuidle_register_device(dev)) { |
| 913 | pr_debug(PREFIX "cpuidle_register_device %d failed!\n", cpu); |
| 914 | intel_idle_cpuidle_devices_uninit(); |
| 915 | return -EIO; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 916 | } |
| 917 | |
Andi Kleen | b66b8b9 | 2012-01-26 00:09:07 +0100 | [diff] [blame] | 918 | if (icpu->auto_demotion_disable_flags) |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 919 | smp_call_function_single(cpu, auto_demotion_disable, NULL, 1); |
| 920 | |
Bartlomiej Zolnierkiewicz | dbf87ab | 2013-12-20 19:47:28 +0100 | [diff] [blame] | 921 | if (icpu->disable_promotion_to_c1e) |
| 922 | smp_call_function_single(cpu, c1e_promotion_disable, NULL, 1); |
| 923 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 924 | return 0; |
| 925 | } |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 926 | |
| 927 | static int __init intel_idle_init(void) |
| 928 | { |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 929 | int retval, i; |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 930 | |
Thomas Renninger | d189604 | 2010-11-03 17:06:14 +0100 | [diff] [blame] | 931 | /* Do not load intel_idle at all for now if idle= is passed */ |
| 932 | if (boot_option_idle_override != IDLE_NO_OVERRIDE) |
| 933 | return -ENODEV; |
| 934 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 935 | retval = intel_idle_probe(); |
| 936 | if (retval) |
| 937 | return retval; |
| 938 | |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 939 | intel_idle_cpuidle_driver_init(); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 940 | retval = cpuidle_register_driver(&intel_idle_driver); |
| 941 | if (retval) { |
Konrad Rzeszutek Wilk | 3735d52 | 2012-08-16 22:06:55 +0200 | [diff] [blame] | 942 | struct cpuidle_driver *drv = cpuidle_get_driver(); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 943 | printk(KERN_DEBUG PREFIX "intel_idle yielding to %s", |
Konrad Rzeszutek Wilk | 3735d52 | 2012-08-16 22:06:55 +0200 | [diff] [blame] | 944 | drv ? drv->name : "none"); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 945 | return retval; |
| 946 | } |
| 947 | |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 948 | intel_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device); |
| 949 | if (intel_idle_cpuidle_devices == NULL) |
| 950 | return -ENOMEM; |
| 951 | |
Srivatsa S. Bhat | 07494d5 | 2014-03-11 02:10:30 +0530 | [diff] [blame] | 952 | cpu_notifier_register_begin(); |
| 953 | |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 954 | for_each_online_cpu(i) { |
| 955 | retval = intel_idle_cpu_init(i); |
| 956 | if (retval) { |
Srivatsa S. Bhat | 07494d5 | 2014-03-11 02:10:30 +0530 | [diff] [blame] | 957 | cpu_notifier_register_done(); |
Thomas Renninger | 65b7f83 | 2012-01-17 22:40:08 +0100 | [diff] [blame] | 958 | cpuidle_unregister_driver(&intel_idle_driver); |
| 959 | return retval; |
| 960 | } |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 961 | } |
Srivatsa S. Bhat | 07494d5 | 2014-03-11 02:10:30 +0530 | [diff] [blame] | 962 | __register_cpu_notifier(&cpu_hotplug_notifier); |
| 963 | |
| 964 | cpu_notifier_register_done(); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 965 | |
| 966 | return 0; |
| 967 | } |
| 968 | |
| 969 | static void __exit intel_idle_exit(void) |
| 970 | { |
| 971 | intel_idle_cpuidle_devices_uninit(); |
| 972 | cpuidle_unregister_driver(&intel_idle_driver); |
| 973 | |
Srivatsa S. Bhat | 07494d5 | 2014-03-11 02:10:30 +0530 | [diff] [blame] | 974 | cpu_notifier_register_begin(); |
Daniel Lezcano | 25ac776 | 2012-07-05 15:23:25 +0200 | [diff] [blame] | 975 | |
| 976 | if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE) |
Shaohua Li | 39a74fd | 2012-01-10 15:48:19 -0800 | [diff] [blame] | 977 | on_each_cpu(__setup_broadcast_timer, (void *)false, 1); |
Srivatsa S. Bhat | 07494d5 | 2014-03-11 02:10:30 +0530 | [diff] [blame] | 978 | __unregister_cpu_notifier(&cpu_hotplug_notifier); |
| 979 | |
| 980 | cpu_notifier_register_done(); |
Shaohua Li | 2a2d31c | 2011-01-10 09:38:12 +0800 | [diff] [blame] | 981 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 982 | return; |
| 983 | } |
| 984 | |
| 985 | module_init(intel_idle_init); |
| 986 | module_exit(intel_idle_exit); |
| 987 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 988 | module_param(max_cstate, int, 0444); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 989 | |
| 990 | MODULE_AUTHOR("Len Brown <len.brown@intel.com>"); |
| 991 | MODULE_DESCRIPTION("Cpuidle driver for Intel Hardware v" INTEL_IDLE_VERSION); |
| 992 | MODULE_LICENSE("GPL"); |