xref: /openbmc/linux/drivers/idle/intel_idle.c (revision 32ad73db) 
1a61127c2SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
226717172SLen Brown /*
326717172SLen Brown  * intel_idle.c - native hardware idle loop for modern Intel processors
426717172SLen Brown  *
5fab04b22SLen Brown  * Copyright (c) 2013, Intel Corporation.
626717172SLen Brown  * Len Brown <len.brown@intel.com>
726717172SLen Brown  */
826717172SLen Brown 
926717172SLen Brown /*
1026717172SLen Brown  * intel_idle is a cpuidle driver that loads on specific Intel processors
1126717172SLen Brown  * in lieu of the legacy ACPI processor_idle driver.  The intent is to
1226717172SLen Brown  * make Linux more efficient on these processors, as intel_idle knows
1326717172SLen Brown  * more than ACPI, as well as make Linux more immune to ACPI BIOS bugs.
1426717172SLen Brown  */
1526717172SLen Brown 
1626717172SLen Brown /*
1726717172SLen Brown  * Design Assumptions
1826717172SLen Brown  *
1926717172SLen Brown  * All CPUs have same idle states as boot CPU
2026717172SLen Brown  *
2126717172SLen Brown  * Chipset BM_STS (bus master status) bit is a NOP
2226717172SLen Brown  *	for preventing entry into deep C-stats
2326717172SLen Brown  */
2426717172SLen Brown 
2526717172SLen Brown /*
2626717172SLen Brown  * Known limitations
2726717172SLen Brown  *
2826717172SLen Brown  * The driver currently initializes for_each_online_cpu() upon modprobe.
2926717172SLen Brown  * It it unaware of subsequent processors hot-added to the system.
3026717172SLen Brown  * This means that if you boot with maxcpus=n and later online
3126717172SLen Brown  * processors above n, those processors will use C1 only.
3226717172SLen Brown  *
3326717172SLen Brown  * ACPI has a .suspend hack to turn off deep c-statees during suspend
3426717172SLen Brown  * to avoid complications with the lapic timer workaround.
3526717172SLen Brown  * Have not seen issues with suspend, but may need same workaround here.
3626717172SLen Brown  *
3726717172SLen Brown  */
3826717172SLen Brown 
3926717172SLen Brown /* un-comment DEBUG to enable pr_debug() statements */
4026717172SLen Brown #define DEBUG
4126717172SLen Brown 
42654d08a4SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
43654d08a4SJoe Perches 
4426717172SLen Brown #include <linux/kernel.h>
4526717172SLen Brown #include <linux/cpuidle.h>
4676962caaSThomas Gleixner #include <linux/tick.h>
4726717172SLen Brown #include <trace/events/power.h>
4826717172SLen Brown #include <linux/sched.h>
492a2d31c8SShaohua Li #include <linux/notifier.h>
502a2d31c8SShaohua Li #include <linux/cpu.h>
5102c4fae9SPaul Gortmaker #include <linux/moduleparam.h>
52b66b8b9aSAndi Kleen #include <asm/cpu_device_id.h>
53db73c5a8SDave Hansen #include <asm/intel-family.h>
54bc83ccccSH. Peter Anvin #include <asm/mwait.h>
5514796fcaSLen Brown #include <asm/msr.h>
5626717172SLen Brown 
57d70e28f5SLen Brown #define INTEL_IDLE_VERSION "0.4.1"
5826717172SLen Brown 
5926717172SLen Brown static struct cpuidle_driver intel_idle_driver = {
6026717172SLen Brown 	.name = "intel_idle",
6126717172SLen Brown 	.owner = THIS_MODULE,
6226717172SLen Brown };
6326717172SLen Brown /* intel_idle.max_cstate=0 disables driver */
64137ecc77SLen Brown static int max_cstate = CPUIDLE_STATE_MAX - 1;
6526717172SLen Brown 
66c4236282SLen Brown static unsigned int mwait_substates;
6726717172SLen Brown 
682a2d31c8SShaohua Li #define LAPIC_TIMER_ALWAYS_RELIABLE 0xFFFFFFFF
6926717172SLen Brown /* Reliable LAPIC Timer States, bit 1 for C1 etc.  */
70d13780d4SLen Brown static unsigned int lapic_timer_reliable_states = (1 << 1);	 /* Default to only C1 */
7126717172SLen Brown 
72b66b8b9aSAndi Kleen struct idle_cpu {
73b66b8b9aSAndi Kleen 	struct cpuidle_state *state_table;
7426717172SLen Brown 
7526717172SLen Brown 	/*
7614796fcaSLen Brown 	 * Hardware C-state auto-demotion may not always be optimal.
7714796fcaSLen Brown 	 * Indicate which enable bits to clear here.
7814796fcaSLen Brown 	 */
79b66b8b9aSAndi Kleen 	unsigned long auto_demotion_disable_flags;
808c058d53SLen Brown 	bool byt_auto_demotion_disable_flag;
8132e95180SLen Brown 	bool disable_promotion_to_c1e;
82b66b8b9aSAndi Kleen };
83b66b8b9aSAndi Kleen 
84b66b8b9aSAndi Kleen static const struct idle_cpu *icpu;
85b66b8b9aSAndi Kleen static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;
86b66b8b9aSAndi Kleen static int intel_idle(struct cpuidle_device *dev,
87b66b8b9aSAndi Kleen 			struct cpuidle_driver *drv, int index);
8828ba086eSRafael J. Wysocki static void intel_idle_s2idle(struct cpuidle_device *dev,
895fe2e527SRafael J. Wysocki 			      struct cpuidle_driver *drv, int index);
90b66b8b9aSAndi Kleen static struct cpuidle_state *cpuidle_state_table;
9114796fcaSLen Brown 
9214796fcaSLen Brown /*
93956d033fSLen Brown  * Set this flag for states where the HW flushes the TLB for us
94956d033fSLen Brown  * and so we don't need cross-calls to keep it consistent.
95956d033fSLen Brown  * If this flag is set, SW flushes the TLB, so even if the
96956d033fSLen Brown  * HW doesn't do the flushing, this flag is safe to use.
97956d033fSLen Brown  */
98956d033fSLen Brown #define CPUIDLE_FLAG_TLB_FLUSHED	0x10000
99956d033fSLen Brown 
100956d033fSLen Brown /*
101b1beab48SLen Brown  * MWAIT takes an 8-bit "hint" in EAX "suggesting"
102b1beab48SLen Brown  * the C-state (top nibble) and sub-state (bottom nibble)
103b1beab48SLen Brown  * 0x00 means "MWAIT(C1)", 0x10 means "MWAIT(C2)" etc.
104b1beab48SLen Brown  *
105b1beab48SLen Brown  * We store the hint at the top of our "flags" for each state.
106b1beab48SLen Brown  */
107b1beab48SLen Brown #define flg2MWAIT(flags) (((flags) >> 24) & 0xFF)
108b1beab48SLen Brown #define MWAIT2flg(eax) ((eax & 0xFF) << 24)
109b1beab48SLen Brown 
110b1beab48SLen Brown /*
11126717172SLen Brown  * States are indexed by the cstate number,
11226717172SLen Brown  * which is also the index into the MWAIT hint array.
11326717172SLen Brown  * Thus C0 is a dummy.
11426717172SLen Brown  */
115ba0dc81eSJiang Liu static struct cpuidle_state nehalem_cstates[] = {
116e022e7ebSLen Brown 	{
117de09cdd0SLen Brown 		.name = "C1",
11826717172SLen Brown 		.desc = "MWAIT 0x00",
119b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
12026717172SLen Brown 		.exit_latency = 3,
12126717172SLen Brown 		.target_residency = 6,
1225fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
12328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
124e022e7ebSLen Brown 	{
125de09cdd0SLen Brown 		.name = "C1E",
12632e95180SLen Brown 		.desc = "MWAIT 0x01",
127b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
12832e95180SLen Brown 		.exit_latency = 10,
12932e95180SLen Brown 		.target_residency = 20,
1305fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
13128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
13232e95180SLen Brown 	{
133de09cdd0SLen Brown 		.name = "C3",
13426717172SLen Brown 		.desc = "MWAIT 0x10",
135b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
13626717172SLen Brown 		.exit_latency = 20,
13726717172SLen Brown 		.target_residency = 80,
1385fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
13928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
140e022e7ebSLen Brown 	{
141de09cdd0SLen Brown 		.name = "C6",
14226717172SLen Brown 		.desc = "MWAIT 0x20",
143b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
14426717172SLen Brown 		.exit_latency = 200,
14526717172SLen Brown 		.target_residency = 800,
1465fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
14728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
148e022e7ebSLen Brown 	{
149e022e7ebSLen Brown 		.enter = NULL }
15026717172SLen Brown };
15126717172SLen Brown 
152ba0dc81eSJiang Liu static struct cpuidle_state snb_cstates[] = {
153e022e7ebSLen Brown 	{
154de09cdd0SLen Brown 		.name = "C1",
155d13780d4SLen Brown 		.desc = "MWAIT 0x00",
156b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
15732e95180SLen Brown 		.exit_latency = 2,
15832e95180SLen Brown 		.target_residency = 2,
1595fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
16028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
16132e95180SLen Brown 	{
162de09cdd0SLen Brown 		.name = "C1E",
16332e95180SLen Brown 		.desc = "MWAIT 0x01",
164b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
16532e95180SLen Brown 		.exit_latency = 10,
16632e95180SLen Brown 		.target_residency = 20,
1675fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
16828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
169e022e7ebSLen Brown 	{
170de09cdd0SLen Brown 		.name = "C3",
171d13780d4SLen Brown 		.desc = "MWAIT 0x10",
172b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
173d13780d4SLen Brown 		.exit_latency = 80,
174ddbd550dSLen Brown 		.target_residency = 211,
1755fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
17628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
177e022e7ebSLen Brown 	{
178de09cdd0SLen Brown 		.name = "C6",
179d13780d4SLen Brown 		.desc = "MWAIT 0x20",
180b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
181d13780d4SLen Brown 		.exit_latency = 104,
182ddbd550dSLen Brown 		.target_residency = 345,
1835fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
18428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
185e022e7ebSLen Brown 	{
186de09cdd0SLen Brown 		.name = "C7",
187d13780d4SLen Brown 		.desc = "MWAIT 0x30",
188b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
189d13780d4SLen Brown 		.exit_latency = 109,
190ddbd550dSLen Brown 		.target_residency = 345,
1915fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
19228ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
193e022e7ebSLen Brown 	{
194e022e7ebSLen Brown 		.enter = NULL }
195d13780d4SLen Brown };
196d13780d4SLen Brown 
197718987d6SLen Brown static struct cpuidle_state byt_cstates[] = {
198718987d6SLen Brown 	{
199de09cdd0SLen Brown 		.name = "C1",
200718987d6SLen Brown 		.desc = "MWAIT 0x00",
201b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
202718987d6SLen Brown 		.exit_latency = 1,
203718987d6SLen Brown 		.target_residency = 1,
2045fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
20528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
206718987d6SLen Brown 	{
207de09cdd0SLen Brown 		.name = "C6N",
208718987d6SLen Brown 		.desc = "MWAIT 0x58",
209b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED,
210d7ef7671SLen Brown 		.exit_latency = 300,
211718987d6SLen Brown 		.target_residency = 275,
2125fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
21328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
214718987d6SLen Brown 	{
215de09cdd0SLen Brown 		.name = "C6S",
216718987d6SLen Brown 		.desc = "MWAIT 0x52",
217b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
218d7ef7671SLen Brown 		.exit_latency = 500,
219718987d6SLen Brown 		.target_residency = 560,
2205fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
22128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
222718987d6SLen Brown 	{
223de09cdd0SLen Brown 		.name = "C7",
224718987d6SLen Brown 		.desc = "MWAIT 0x60",
225b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
226718987d6SLen Brown 		.exit_latency = 1200,
227d7ef7671SLen Brown 		.target_residency = 4000,
2285fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
22928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
230718987d6SLen Brown 	{
231de09cdd0SLen Brown 		.name = "C7S",
232718987d6SLen Brown 		.desc = "MWAIT 0x64",
233b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED,
234718987d6SLen Brown 		.exit_latency = 10000,
235718987d6SLen Brown 		.target_residency = 20000,
2365fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
23728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
238718987d6SLen Brown 	{
239718987d6SLen Brown 		.enter = NULL }
240718987d6SLen Brown };
241718987d6SLen Brown 
242cab07a56SLen Brown static struct cpuidle_state cht_cstates[] = {
243cab07a56SLen Brown 	{
244de09cdd0SLen Brown 		.name = "C1",
245cab07a56SLen Brown 		.desc = "MWAIT 0x00",
246cab07a56SLen Brown 		.flags = MWAIT2flg(0x00),
247cab07a56SLen Brown 		.exit_latency = 1,
248cab07a56SLen Brown 		.target_residency = 1,
249cab07a56SLen Brown 		.enter = &intel_idle,
25028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
251cab07a56SLen Brown 	{
252de09cdd0SLen Brown 		.name = "C6N",
253cab07a56SLen Brown 		.desc = "MWAIT 0x58",
254cab07a56SLen Brown 		.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED,
255cab07a56SLen Brown 		.exit_latency = 80,
256cab07a56SLen Brown 		.target_residency = 275,
257cab07a56SLen Brown 		.enter = &intel_idle,
25828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
259cab07a56SLen Brown 	{
260de09cdd0SLen Brown 		.name = "C6S",
261cab07a56SLen Brown 		.desc = "MWAIT 0x52",
262cab07a56SLen Brown 		.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
263cab07a56SLen Brown 		.exit_latency = 200,
264cab07a56SLen Brown 		.target_residency = 560,
265cab07a56SLen Brown 		.enter = &intel_idle,
26628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
267cab07a56SLen Brown 	{
268de09cdd0SLen Brown 		.name = "C7",
269cab07a56SLen Brown 		.desc = "MWAIT 0x60",
270cab07a56SLen Brown 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
271cab07a56SLen Brown 		.exit_latency = 1200,
272cab07a56SLen Brown 		.target_residency = 4000,
273cab07a56SLen Brown 		.enter = &intel_idle,
27428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
275cab07a56SLen Brown 	{
276de09cdd0SLen Brown 		.name = "C7S",
277cab07a56SLen Brown 		.desc = "MWAIT 0x64",
278cab07a56SLen Brown 		.flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED,
279cab07a56SLen Brown 		.exit_latency = 10000,
280cab07a56SLen Brown 		.target_residency = 20000,
281cab07a56SLen Brown 		.enter = &intel_idle,
28228ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
283cab07a56SLen Brown 	{
284cab07a56SLen Brown 		.enter = NULL }
285cab07a56SLen Brown };
286cab07a56SLen Brown 
287ba0dc81eSJiang Liu static struct cpuidle_state ivb_cstates[] = {
288e022e7ebSLen Brown 	{
289de09cdd0SLen Brown 		.name = "C1",
2906edab08cSLen Brown 		.desc = "MWAIT 0x00",
291b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
2926edab08cSLen Brown 		.exit_latency = 1,
2936edab08cSLen Brown 		.target_residency = 1,
2945fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
29528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
296e022e7ebSLen Brown 	{
297de09cdd0SLen Brown 		.name = "C1E",
29832e95180SLen Brown 		.desc = "MWAIT 0x01",
299b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
30032e95180SLen Brown 		.exit_latency = 10,
30132e95180SLen Brown 		.target_residency = 20,
3025fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
30328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
30432e95180SLen Brown 	{
305de09cdd0SLen Brown 		.name = "C3",
3066edab08cSLen Brown 		.desc = "MWAIT 0x10",
307b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
3086edab08cSLen Brown 		.exit_latency = 59,
3096edab08cSLen Brown 		.target_residency = 156,
3105fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
31128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
312e022e7ebSLen Brown 	{
313de09cdd0SLen Brown 		.name = "C6",
3146edab08cSLen Brown 		.desc = "MWAIT 0x20",
315b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
3166edab08cSLen Brown 		.exit_latency = 80,
3176edab08cSLen Brown 		.target_residency = 300,
3185fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
31928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
320e022e7ebSLen Brown 	{
321de09cdd0SLen Brown 		.name = "C7",
3226edab08cSLen Brown 		.desc = "MWAIT 0x30",
323b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
3246edab08cSLen Brown 		.exit_latency = 87,
3256edab08cSLen Brown 		.target_residency = 300,
3265fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
32728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
328e022e7ebSLen Brown 	{
329e022e7ebSLen Brown 		.enter = NULL }
3306edab08cSLen Brown };
3316edab08cSLen Brown 
3320138d8f0SLen Brown static struct cpuidle_state ivt_cstates[] = {
3330138d8f0SLen Brown 	{
334de09cdd0SLen Brown 		.name = "C1",
3350138d8f0SLen Brown 		.desc = "MWAIT 0x00",
336b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
3370138d8f0SLen Brown 		.exit_latency = 1,
3380138d8f0SLen Brown 		.target_residency = 1,
3395fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
34028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3410138d8f0SLen Brown 	{
342de09cdd0SLen Brown 		.name = "C1E",
3430138d8f0SLen Brown 		.desc = "MWAIT 0x01",
344b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
3450138d8f0SLen Brown 		.exit_latency = 10,
3460138d8f0SLen Brown 		.target_residency = 80,
3475fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
34828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3490138d8f0SLen Brown 	{
350de09cdd0SLen Brown 		.name = "C3",
3510138d8f0SLen Brown 		.desc = "MWAIT 0x10",
352b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
3530138d8f0SLen Brown 		.exit_latency = 59,
3540138d8f0SLen Brown 		.target_residency = 156,
3555fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
35628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3570138d8f0SLen Brown 	{
358de09cdd0SLen Brown 		.name = "C6",
3590138d8f0SLen Brown 		.desc = "MWAIT 0x20",
360b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
3610138d8f0SLen Brown 		.exit_latency = 82,
3620138d8f0SLen Brown 		.target_residency = 300,
3635fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
36428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3650138d8f0SLen Brown 	{
3660138d8f0SLen Brown 		.enter = NULL }
3670138d8f0SLen Brown };
3680138d8f0SLen Brown 
3690138d8f0SLen Brown static struct cpuidle_state ivt_cstates_4s[] = {
3700138d8f0SLen Brown 	{
371de09cdd0SLen Brown 		.name = "C1",
3720138d8f0SLen Brown 		.desc = "MWAIT 0x00",
373b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
3740138d8f0SLen Brown 		.exit_latency = 1,
3750138d8f0SLen Brown 		.target_residency = 1,
3765fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
37728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3780138d8f0SLen Brown 	{
379de09cdd0SLen Brown 		.name = "C1E",
3800138d8f0SLen Brown 		.desc = "MWAIT 0x01",
381b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
3820138d8f0SLen Brown 		.exit_latency = 10,
3830138d8f0SLen Brown 		.target_residency = 250,
3845fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
38528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3860138d8f0SLen Brown 	{
387de09cdd0SLen Brown 		.name = "C3",
3880138d8f0SLen Brown 		.desc = "MWAIT 0x10",
389b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
3900138d8f0SLen Brown 		.exit_latency = 59,
3910138d8f0SLen Brown 		.target_residency = 300,
3925fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
39328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
3940138d8f0SLen Brown 	{
395de09cdd0SLen Brown 		.name = "C6",
3960138d8f0SLen Brown 		.desc = "MWAIT 0x20",
397b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
3980138d8f0SLen Brown 		.exit_latency = 84,
3990138d8f0SLen Brown 		.target_residency = 400,
4005fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
40128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
4020138d8f0SLen Brown 	{
4030138d8f0SLen Brown 		.enter = NULL }
4040138d8f0SLen Brown };
4050138d8f0SLen Brown 
4060138d8f0SLen Brown static struct cpuidle_state ivt_cstates_8s[] = {
4070138d8f0SLen Brown 	{
408de09cdd0SLen Brown 		.name = "C1",
4090138d8f0SLen Brown 		.desc = "MWAIT 0x00",
410b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
4110138d8f0SLen Brown 		.exit_latency = 1,
4120138d8f0SLen Brown 		.target_residency = 1,
4135fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
41428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
4150138d8f0SLen Brown 	{
416de09cdd0SLen Brown 		.name = "C1E",
4170138d8f0SLen Brown 		.desc = "MWAIT 0x01",
418b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
4190138d8f0SLen Brown 		.exit_latency = 10,
4200138d8f0SLen Brown 		.target_residency = 500,
4215fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
42228ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
4230138d8f0SLen Brown 	{
424de09cdd0SLen Brown 		.name = "C3",
4250138d8f0SLen Brown 		.desc = "MWAIT 0x10",
426b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
4270138d8f0SLen Brown 		.exit_latency = 59,
4280138d8f0SLen Brown 		.target_residency = 600,
4295fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
43028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
4310138d8f0SLen Brown 	{
432de09cdd0SLen Brown 		.name = "C6",
4330138d8f0SLen Brown 		.desc = "MWAIT 0x20",
434b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
4350138d8f0SLen Brown 		.exit_latency = 88,
4360138d8f0SLen Brown 		.target_residency = 700,
4375fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
43828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
4390138d8f0SLen Brown 	{
4400138d8f0SLen Brown 		.enter = NULL }
4410138d8f0SLen Brown };
4420138d8f0SLen Brown 
443ba0dc81eSJiang Liu static struct cpuidle_state hsw_cstates[] = {
444e022e7ebSLen Brown 	{
445de09cdd0SLen Brown 		.name = "C1",
44685a4d2d4SLen Brown 		.desc = "MWAIT 0x00",
447b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
44885a4d2d4SLen Brown 		.exit_latency = 2,
44985a4d2d4SLen Brown 		.target_residency = 2,
4505fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
45128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
452e022e7ebSLen Brown 	{
453de09cdd0SLen Brown 		.name = "C1E",
45432e95180SLen Brown 		.desc = "MWAIT 0x01",
455b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
45632e95180SLen Brown 		.exit_latency = 10,
45732e95180SLen Brown 		.target_residency = 20,
4585fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
45928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
46032e95180SLen Brown 	{
461de09cdd0SLen Brown 		.name = "C3",
46285a4d2d4SLen Brown 		.desc = "MWAIT 0x10",
463b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
46485a4d2d4SLen Brown 		.exit_latency = 33,
46585a4d2d4SLen Brown 		.target_residency = 100,
4665fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
46728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
468e022e7ebSLen Brown 	{
469de09cdd0SLen Brown 		.name = "C6",
47085a4d2d4SLen Brown 		.desc = "MWAIT 0x20",
471b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
47285a4d2d4SLen Brown 		.exit_latency = 133,
47385a4d2d4SLen Brown 		.target_residency = 400,
4745fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
47528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
476e022e7ebSLen Brown 	{
477de09cdd0SLen Brown 		.name = "C7s",
47885a4d2d4SLen Brown 		.desc = "MWAIT 0x32",
479b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TLB_FLUSHED,
48085a4d2d4SLen Brown 		.exit_latency = 166,
48185a4d2d4SLen Brown 		.target_residency = 500,
4825fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
48328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
484e022e7ebSLen Brown 	{
485de09cdd0SLen Brown 		.name = "C8",
48686239cebSLen Brown 		.desc = "MWAIT 0x40",
487b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
48886239cebSLen Brown 		.exit_latency = 300,
48986239cebSLen Brown 		.target_residency = 900,
4905fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
49128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
49286239cebSLen Brown 	{
493de09cdd0SLen Brown 		.name = "C9",
49486239cebSLen Brown 		.desc = "MWAIT 0x50",
495b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
49686239cebSLen Brown 		.exit_latency = 600,
49786239cebSLen Brown 		.target_residency = 1800,
4985fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
49928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
50086239cebSLen Brown 	{
501de09cdd0SLen Brown 		.name = "C10",
50286239cebSLen Brown 		.desc = "MWAIT 0x60",
503b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
50486239cebSLen Brown 		.exit_latency = 2600,
50586239cebSLen Brown 		.target_residency = 7700,
5065fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
50728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
50886239cebSLen Brown 	{
509e022e7ebSLen Brown 		.enter = NULL }
51085a4d2d4SLen Brown };
511a138b568SLen Brown static struct cpuidle_state bdw_cstates[] = {
512a138b568SLen Brown 	{
513de09cdd0SLen Brown 		.name = "C1",
514a138b568SLen Brown 		.desc = "MWAIT 0x00",
515b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
516a138b568SLen Brown 		.exit_latency = 2,
517a138b568SLen Brown 		.target_residency = 2,
5185fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
51928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
520a138b568SLen Brown 	{
521de09cdd0SLen Brown 		.name = "C1E",
522a138b568SLen Brown 		.desc = "MWAIT 0x01",
523b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x01),
524a138b568SLen Brown 		.exit_latency = 10,
525a138b568SLen Brown 		.target_residency = 20,
5265fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
52728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
528a138b568SLen Brown 	{
529de09cdd0SLen Brown 		.name = "C3",
530a138b568SLen Brown 		.desc = "MWAIT 0x10",
531b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
532a138b568SLen Brown 		.exit_latency = 40,
533a138b568SLen Brown 		.target_residency = 100,
5345fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
53528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
536a138b568SLen Brown 	{
537de09cdd0SLen Brown 		.name = "C6",
538a138b568SLen Brown 		.desc = "MWAIT 0x20",
539b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
540a138b568SLen Brown 		.exit_latency = 133,
541a138b568SLen Brown 		.target_residency = 400,
5425fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
54328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
544a138b568SLen Brown 	{
545de09cdd0SLen Brown 		.name = "C7s",
546a138b568SLen Brown 		.desc = "MWAIT 0x32",
547b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TLB_FLUSHED,
548a138b568SLen Brown 		.exit_latency = 166,
549a138b568SLen Brown 		.target_residency = 500,
5505fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
55128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
552a138b568SLen Brown 	{
553de09cdd0SLen Brown 		.name = "C8",
554a138b568SLen Brown 		.desc = "MWAIT 0x40",
555b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
556a138b568SLen Brown 		.exit_latency = 300,
557a138b568SLen Brown 		.target_residency = 900,
5585fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
55928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
560a138b568SLen Brown 	{
561de09cdd0SLen Brown 		.name = "C9",
562a138b568SLen Brown 		.desc = "MWAIT 0x50",
563b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
564a138b568SLen Brown 		.exit_latency = 600,
565a138b568SLen Brown 		.target_residency = 1800,
5665fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
56728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
568a138b568SLen Brown 	{
569de09cdd0SLen Brown 		.name = "C10",
570a138b568SLen Brown 		.desc = "MWAIT 0x60",
571b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
572a138b568SLen Brown 		.exit_latency = 2600,
573a138b568SLen Brown 		.target_residency = 7700,
5745fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
57528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
576a138b568SLen Brown 	{
577a138b568SLen Brown 		.enter = NULL }
578a138b568SLen Brown };
57985a4d2d4SLen Brown 
580493f133fSLen Brown static struct cpuidle_state skl_cstates[] = {
581493f133fSLen Brown 	{
582de09cdd0SLen Brown 		.name = "C1",
583493f133fSLen Brown 		.desc = "MWAIT 0x00",
584493f133fSLen Brown 		.flags = MWAIT2flg(0x00),
585493f133fSLen Brown 		.exit_latency = 2,
586493f133fSLen Brown 		.target_residency = 2,
587493f133fSLen Brown 		.enter = &intel_idle,
58828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
589493f133fSLen Brown 	{
590de09cdd0SLen Brown 		.name = "C1E",
591493f133fSLen Brown 		.desc = "MWAIT 0x01",
592493f133fSLen Brown 		.flags = MWAIT2flg(0x01),
593493f133fSLen Brown 		.exit_latency = 10,
594493f133fSLen Brown 		.target_residency = 20,
595493f133fSLen Brown 		.enter = &intel_idle,
59628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
597493f133fSLen Brown 	{
598de09cdd0SLen Brown 		.name = "C3",
599493f133fSLen Brown 		.desc = "MWAIT 0x10",
600493f133fSLen Brown 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
601493f133fSLen Brown 		.exit_latency = 70,
602493f133fSLen Brown 		.target_residency = 100,
603493f133fSLen Brown 		.enter = &intel_idle,
60428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
605493f133fSLen Brown 	{
606de09cdd0SLen Brown 		.name = "C6",
607493f133fSLen Brown 		.desc = "MWAIT 0x20",
608493f133fSLen Brown 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
609135919a3SLen Brown 		.exit_latency = 85,
610493f133fSLen Brown 		.target_residency = 200,
611493f133fSLen Brown 		.enter = &intel_idle,
61228ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
613493f133fSLen Brown 	{
614de09cdd0SLen Brown 		.name = "C7s",
615493f133fSLen Brown 		.desc = "MWAIT 0x33",
616493f133fSLen Brown 		.flags = MWAIT2flg(0x33) | CPUIDLE_FLAG_TLB_FLUSHED,
617493f133fSLen Brown 		.exit_latency = 124,
618493f133fSLen Brown 		.target_residency = 800,
619493f133fSLen Brown 		.enter = &intel_idle,
62028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
621493f133fSLen Brown 	{
622de09cdd0SLen Brown 		.name = "C8",
623493f133fSLen Brown 		.desc = "MWAIT 0x40",
624493f133fSLen Brown 		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
625135919a3SLen Brown 		.exit_latency = 200,
626493f133fSLen Brown 		.target_residency = 800,
627493f133fSLen Brown 		.enter = &intel_idle,
62828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
629493f133fSLen Brown 	{
630de09cdd0SLen Brown 		.name = "C9",
631135919a3SLen Brown 		.desc = "MWAIT 0x50",
632135919a3SLen Brown 		.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
633135919a3SLen Brown 		.exit_latency = 480,
634135919a3SLen Brown 		.target_residency = 5000,
635135919a3SLen Brown 		.enter = &intel_idle,
63628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
637135919a3SLen Brown 	{
638de09cdd0SLen Brown 		.name = "C10",
639493f133fSLen Brown 		.desc = "MWAIT 0x60",
640493f133fSLen Brown 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
641493f133fSLen Brown 		.exit_latency = 890,
642493f133fSLen Brown 		.target_residency = 5000,
643493f133fSLen Brown 		.enter = &intel_idle,
64428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
645493f133fSLen Brown 	{
646493f133fSLen Brown 		.enter = NULL }
647493f133fSLen Brown };
648493f133fSLen Brown 
649f9e71657SLen Brown static struct cpuidle_state skx_cstates[] = {
650f9e71657SLen Brown 	{
651de09cdd0SLen Brown 		.name = "C1",
652f9e71657SLen Brown 		.desc = "MWAIT 0x00",
653f9e71657SLen Brown 		.flags = MWAIT2flg(0x00),
654f9e71657SLen Brown 		.exit_latency = 2,
655f9e71657SLen Brown 		.target_residency = 2,
656f9e71657SLen Brown 		.enter = &intel_idle,
65728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
658f9e71657SLen Brown 	{
659de09cdd0SLen Brown 		.name = "C1E",
660f9e71657SLen Brown 		.desc = "MWAIT 0x01",
661f9e71657SLen Brown 		.flags = MWAIT2flg(0x01),
662f9e71657SLen Brown 		.exit_latency = 10,
663f9e71657SLen Brown 		.target_residency = 20,
664f9e71657SLen Brown 		.enter = &intel_idle,
66528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
666f9e71657SLen Brown 	{
667de09cdd0SLen Brown 		.name = "C6",
668f9e71657SLen Brown 		.desc = "MWAIT 0x20",
669f9e71657SLen Brown 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
670f9e71657SLen Brown 		.exit_latency = 133,
671f9e71657SLen Brown 		.target_residency = 600,
672f9e71657SLen Brown 		.enter = &intel_idle,
67328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
674f9e71657SLen Brown 	{
675f9e71657SLen Brown 		.enter = NULL }
676f9e71657SLen Brown };
677f9e71657SLen Brown 
678ba0dc81eSJiang Liu static struct cpuidle_state atom_cstates[] = {
679e022e7ebSLen Brown 	{
680de09cdd0SLen Brown 		.name = "C1E",
68126717172SLen Brown 		.desc = "MWAIT 0x00",
682b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
68332e95180SLen Brown 		.exit_latency = 10,
68432e95180SLen Brown 		.target_residency = 20,
6855fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
68628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
687e022e7ebSLen Brown 	{
688de09cdd0SLen Brown 		.name = "C2",
68926717172SLen Brown 		.desc = "MWAIT 0x10",
690b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x10),
69126717172SLen Brown 		.exit_latency = 20,
69226717172SLen Brown 		.target_residency = 80,
6935fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
69428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
695e022e7ebSLen Brown 	{
696de09cdd0SLen Brown 		.name = "C4",
69726717172SLen Brown 		.desc = "MWAIT 0x30",
698b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
69926717172SLen Brown 		.exit_latency = 100,
70026717172SLen Brown 		.target_residency = 400,
7015fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
70228ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
703e022e7ebSLen Brown 	{
704de09cdd0SLen Brown 		.name = "C6",
7057fcca7d9SLen Brown 		.desc = "MWAIT 0x52",
706b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
7077fcca7d9SLen Brown 		.exit_latency = 140,
7087fcca7d9SLen Brown 		.target_residency = 560,
7095fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
71028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
711e022e7ebSLen Brown 	{
712e022e7ebSLen Brown 		.enter = NULL }
71326717172SLen Brown };
7145e7ec268SAndy Shevchenko static struct cpuidle_state tangier_cstates[] = {
7155e7ec268SAndy Shevchenko 	{
716de09cdd0SLen Brown 		.name = "C1",
7175e7ec268SAndy Shevchenko 		.desc = "MWAIT 0x00",
7185e7ec268SAndy Shevchenko 		.flags = MWAIT2flg(0x00),
7195e7ec268SAndy Shevchenko 		.exit_latency = 1,
7205e7ec268SAndy Shevchenko 		.target_residency = 4,
7215e7ec268SAndy Shevchenko 		.enter = &intel_idle,
72228ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
7235e7ec268SAndy Shevchenko 	{
724de09cdd0SLen Brown 		.name = "C4",
7255e7ec268SAndy Shevchenko 		.desc = "MWAIT 0x30",
7265e7ec268SAndy Shevchenko 		.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
7275e7ec268SAndy Shevchenko 		.exit_latency = 100,
7285e7ec268SAndy Shevchenko 		.target_residency = 400,
7295e7ec268SAndy Shevchenko 		.enter = &intel_idle,
73028ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
7315e7ec268SAndy Shevchenko 	{
732de09cdd0SLen Brown 		.name = "C6",
7335e7ec268SAndy Shevchenko 		.desc = "MWAIT 0x52",
7345e7ec268SAndy Shevchenko 		.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
7355e7ec268SAndy Shevchenko 		.exit_latency = 140,
7365e7ec268SAndy Shevchenko 		.target_residency = 560,
7375e7ec268SAndy Shevchenko 		.enter = &intel_idle,
73828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
7395e7ec268SAndy Shevchenko 	{
740de09cdd0SLen Brown 		.name = "C7",
7415e7ec268SAndy Shevchenko 		.desc = "MWAIT 0x60",
7425e7ec268SAndy Shevchenko 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
7435e7ec268SAndy Shevchenko 		.exit_latency = 1200,
7445e7ec268SAndy Shevchenko 		.target_residency = 4000,
7455e7ec268SAndy Shevchenko 		.enter = &intel_idle,
74628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
7475e7ec268SAndy Shevchenko 	{
748de09cdd0SLen Brown 		.name = "C9",
7495e7ec268SAndy Shevchenko 		.desc = "MWAIT 0x64",
7505e7ec268SAndy Shevchenko 		.flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED,
7515e7ec268SAndy Shevchenko 		.exit_latency = 10000,
7525e7ec268SAndy Shevchenko 		.target_residency = 20000,
7535e7ec268SAndy Shevchenko 		.enter = &intel_idle,
75428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
7555e7ec268SAndy Shevchenko 	{
7565e7ec268SAndy Shevchenko 		.enter = NULL }
7575e7ec268SAndy Shevchenko };
75888390996SJiang Liu static struct cpuidle_state avn_cstates[] = {
759fab04b22SLen Brown 	{
760de09cdd0SLen Brown 		.name = "C1",
761fab04b22SLen Brown 		.desc = "MWAIT 0x00",
762b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x00),
763fab04b22SLen Brown 		.exit_latency = 2,
764fab04b22SLen Brown 		.target_residency = 2,
7655fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
76628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
767fab04b22SLen Brown 	{
768de09cdd0SLen Brown 		.name = "C6",
769fab04b22SLen Brown 		.desc = "MWAIT 0x51",
770b82b6ccaSDaniel Lezcano 		.flags = MWAIT2flg(0x51) | CPUIDLE_FLAG_TLB_FLUSHED,
771fab04b22SLen Brown 		.exit_latency = 15,
772fab04b22SLen Brown 		.target_residency = 45,
7735fe2e527SRafael J. Wysocki 		.enter = &intel_idle,
77428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
77588390996SJiang Liu 	{
77688390996SJiang Liu 		.enter = NULL }
777fab04b22SLen Brown };
778281baf7aSDasaratharaman Chandramouli static struct cpuidle_state knl_cstates[] = {
779281baf7aSDasaratharaman Chandramouli 	{
780de09cdd0SLen Brown 		.name = "C1",
781281baf7aSDasaratharaman Chandramouli 		.desc = "MWAIT 0x00",
782281baf7aSDasaratharaman Chandramouli 		.flags = MWAIT2flg(0x00),
783281baf7aSDasaratharaman Chandramouli 		.exit_latency = 1,
784281baf7aSDasaratharaman Chandramouli 		.target_residency = 2,
785281baf7aSDasaratharaman Chandramouli 		.enter = &intel_idle,
78628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle },
787281baf7aSDasaratharaman Chandramouli 	{
788de09cdd0SLen Brown 		.name = "C6",
789281baf7aSDasaratharaman Chandramouli 		.desc = "MWAIT 0x10",
790281baf7aSDasaratharaman Chandramouli 		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
791281baf7aSDasaratharaman Chandramouli 		.exit_latency = 120,
792281baf7aSDasaratharaman Chandramouli 		.target_residency = 500,
793281baf7aSDasaratharaman Chandramouli 		.enter = &intel_idle,
79428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle },
795281baf7aSDasaratharaman Chandramouli 	{
796281baf7aSDasaratharaman Chandramouli 		.enter = NULL }
797281baf7aSDasaratharaman Chandramouli };
79826717172SLen Brown 
7995dcef694SLen Brown static struct cpuidle_state bxt_cstates[] = {
8005dcef694SLen Brown 	{
801de09cdd0SLen Brown 		.name = "C1",
8025dcef694SLen Brown 		.desc = "MWAIT 0x00",
8035dcef694SLen Brown 		.flags = MWAIT2flg(0x00),
8045dcef694SLen Brown 		.exit_latency = 2,
8055dcef694SLen Brown 		.target_residency = 2,
8065dcef694SLen Brown 		.enter = &intel_idle,
80728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8085dcef694SLen Brown 	{
809de09cdd0SLen Brown 		.name = "C1E",
8105dcef694SLen Brown 		.desc = "MWAIT 0x01",
8115dcef694SLen Brown 		.flags = MWAIT2flg(0x01),
8125dcef694SLen Brown 		.exit_latency = 10,
8135dcef694SLen Brown 		.target_residency = 20,
8145dcef694SLen Brown 		.enter = &intel_idle,
81528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8165dcef694SLen Brown 	{
817de09cdd0SLen Brown 		.name = "C6",
8185dcef694SLen Brown 		.desc = "MWAIT 0x20",
8195dcef694SLen Brown 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
8205dcef694SLen Brown 		.exit_latency = 133,
8215dcef694SLen Brown 		.target_residency = 133,
8225dcef694SLen Brown 		.enter = &intel_idle,
82328ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8245dcef694SLen Brown 	{
825de09cdd0SLen Brown 		.name = "C7s",
8265dcef694SLen Brown 		.desc = "MWAIT 0x31",
8275dcef694SLen Brown 		.flags = MWAIT2flg(0x31) | CPUIDLE_FLAG_TLB_FLUSHED,
8285dcef694SLen Brown 		.exit_latency = 155,
8295dcef694SLen Brown 		.target_residency = 155,
8305dcef694SLen Brown 		.enter = &intel_idle,
83128ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8325dcef694SLen Brown 	{
833de09cdd0SLen Brown 		.name = "C8",
8345dcef694SLen Brown 		.desc = "MWAIT 0x40",
8355dcef694SLen Brown 		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
8365dcef694SLen Brown 		.exit_latency = 1000,
8375dcef694SLen Brown 		.target_residency = 1000,
8385dcef694SLen Brown 		.enter = &intel_idle,
83928ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8405dcef694SLen Brown 	{
841de09cdd0SLen Brown 		.name = "C9",
8425dcef694SLen Brown 		.desc = "MWAIT 0x50",
8435dcef694SLen Brown 		.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
8445dcef694SLen Brown 		.exit_latency = 2000,
8455dcef694SLen Brown 		.target_residency = 2000,
8465dcef694SLen Brown 		.enter = &intel_idle,
84728ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8485dcef694SLen Brown 	{
849de09cdd0SLen Brown 		.name = "C10",
8505dcef694SLen Brown 		.desc = "MWAIT 0x60",
8515dcef694SLen Brown 		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
8525dcef694SLen Brown 		.exit_latency = 10000,
8535dcef694SLen Brown 		.target_residency = 10000,
8545dcef694SLen Brown 		.enter = &intel_idle,
85528ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8565dcef694SLen Brown 	{
8575dcef694SLen Brown 		.enter = NULL }
8585dcef694SLen Brown };
8595dcef694SLen Brown 
8600080d65bSJacob Pan static struct cpuidle_state dnv_cstates[] = {
8610080d65bSJacob Pan 	{
862de09cdd0SLen Brown 		.name = "C1",
8630080d65bSJacob Pan 		.desc = "MWAIT 0x00",
8640080d65bSJacob Pan 		.flags = MWAIT2flg(0x00),
8650080d65bSJacob Pan 		.exit_latency = 2,
8660080d65bSJacob Pan 		.target_residency = 2,
8670080d65bSJacob Pan 		.enter = &intel_idle,
86828ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8690080d65bSJacob Pan 	{
870de09cdd0SLen Brown 		.name = "C1E",
8710080d65bSJacob Pan 		.desc = "MWAIT 0x01",
8720080d65bSJacob Pan 		.flags = MWAIT2flg(0x01),
8730080d65bSJacob Pan 		.exit_latency = 10,
8740080d65bSJacob Pan 		.target_residency = 20,
8750080d65bSJacob Pan 		.enter = &intel_idle,
87628ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8770080d65bSJacob Pan 	{
878de09cdd0SLen Brown 		.name = "C6",
8790080d65bSJacob Pan 		.desc = "MWAIT 0x20",
8800080d65bSJacob Pan 		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
8810080d65bSJacob Pan 		.exit_latency = 50,
8820080d65bSJacob Pan 		.target_residency = 500,
8830080d65bSJacob Pan 		.enter = &intel_idle,
88428ba086eSRafael J. Wysocki 		.enter_s2idle = intel_idle_s2idle, },
8850080d65bSJacob Pan 	{
8860080d65bSJacob Pan 		.enter = NULL }
8870080d65bSJacob Pan };
8880080d65bSJacob Pan 
88926717172SLen Brown /**
89026717172SLen Brown  * intel_idle
89126717172SLen Brown  * @dev: cpuidle_device
89246bcfad7SDeepthi Dharwar  * @drv: cpuidle driver
893e978aa7dSDeepthi Dharwar  * @index: index of cpuidle state
89426717172SLen Brown  *
89563ff07beSYanmin Zhang  * Must be called under local_irq_disable().
89626717172SLen Brown  */
8976727ad9eSChris Metcalf static __cpuidle int intel_idle(struct cpuidle_device *dev,
89846bcfad7SDeepthi Dharwar 				struct cpuidle_driver *drv, int index)
89926717172SLen Brown {
90026717172SLen Brown 	unsigned long ecx = 1; /* break on interrupt flag */
90146bcfad7SDeepthi Dharwar 	struct cpuidle_state *state = &drv->states[index];
902b1beab48SLen Brown 	unsigned long eax = flg2MWAIT(state->flags);
90326717172SLen Brown 	unsigned int cstate;
9040563bb7bSJason Baron 	bool uninitialized_var(tick);
90567535736SAndy Lutomirski 	int cpu = smp_processor_id();
90626717172SLen Brown 
9076110a1f4SSuresh Siddha 	/*
90867535736SAndy Lutomirski 	 * leave_mm() to avoid costly and often unnecessary wakeups
90967535736SAndy Lutomirski 	 * for flushing the user TLB's associated with the active mm.
9106110a1f4SSuresh Siddha 	 */
91167535736SAndy Lutomirski 	if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED)
91267535736SAndy Lutomirski 		leave_mm(cpu);
9136110a1f4SSuresh Siddha 
9140563bb7bSJason Baron 	if (!static_cpu_has(X86_FEATURE_ARAT)) {
9150563bb7bSJason Baron 		cstate = (((eax) >> MWAIT_SUBSTATE_SIZE) &
9160563bb7bSJason Baron 				MWAIT_CSTATE_MASK) + 1;
9170563bb7bSJason Baron 		tick = false;
9180563bb7bSJason Baron 		if (!(lapic_timer_reliable_states & (1 << (cstate)))) {
9190563bb7bSJason Baron 			tick = true;
920f6cee191SThomas Gleixner 			tick_broadcast_enter();
9210563bb7bSJason Baron 		}
9220563bb7bSJason Baron 	}
92326717172SLen Brown 
92416824255SPeter Zijlstra 	mwait_idle_with_hints(eax, ecx);
92526717172SLen Brown 
9260563bb7bSJason Baron 	if (!static_cpu_has(X86_FEATURE_ARAT) && tick)
927f6cee191SThomas Gleixner 		tick_broadcast_exit();
92826717172SLen Brown 
929e978aa7dSDeepthi Dharwar 	return index;
93026717172SLen Brown }
93126717172SLen Brown 
9325fe2e527SRafael J. Wysocki /**
93328ba086eSRafael J. Wysocki  * intel_idle_s2idle - simplified "enter" callback routine for suspend-to-idle
9345fe2e527SRafael J. Wysocki  * @dev: cpuidle_device
9355fe2e527SRafael J. Wysocki  * @drv: cpuidle driver
9365fe2e527SRafael J. Wysocki  * @index: state index
9375fe2e527SRafael J. Wysocki  */
93828ba086eSRafael J. Wysocki static void intel_idle_s2idle(struct cpuidle_device *dev,
9395fe2e527SRafael J. Wysocki 			     struct cpuidle_driver *drv, int index)
9405fe2e527SRafael J. Wysocki {
9415fe2e527SRafael J. Wysocki 	unsigned long ecx = 1; /* break on interrupt flag */
9425fe2e527SRafael J. Wysocki 	unsigned long eax = flg2MWAIT(drv->states[index].flags);
9435fe2e527SRafael J. Wysocki 
9445fe2e527SRafael J. Wysocki 	mwait_idle_with_hints(eax, ecx);
9455fe2e527SRafael J. Wysocki }
9465fe2e527SRafael J. Wysocki 
947fb1013a0SSebastian Andrzej Siewior static void __setup_broadcast_timer(bool on)
9482a2d31c8SShaohua Li {
94976962caaSThomas Gleixner 	if (on)
95076962caaSThomas Gleixner 		tick_broadcast_enable();
95176962caaSThomas Gleixner 	else
95276962caaSThomas Gleixner 		tick_broadcast_disable();
9532a2d31c8SShaohua Li }
9542a2d31c8SShaohua Li 
955fb1013a0SSebastian Andrzej Siewior static void auto_demotion_disable(void)
95614796fcaSLen Brown {
95714796fcaSLen Brown 	unsigned long long msr_bits;
95814796fcaSLen Brown 
9596cfb2374SLen Brown 	rdmsrl(MSR_PKG_CST_CONFIG_CONTROL, msr_bits);
960b66b8b9aSAndi Kleen 	msr_bits &= ~(icpu->auto_demotion_disable_flags);
9616cfb2374SLen Brown 	wrmsrl(MSR_PKG_CST_CONFIG_CONTROL, msr_bits);
96214796fcaSLen Brown }
963fb1013a0SSebastian Andrzej Siewior static void c1e_promotion_disable(void)
96432e95180SLen Brown {
96532e95180SLen Brown 	unsigned long long msr_bits;
96632e95180SLen Brown 
96732e95180SLen Brown 	rdmsrl(MSR_IA32_POWER_CTL, msr_bits);
96832e95180SLen Brown 	msr_bits &= ~0x2;
96932e95180SLen Brown 	wrmsrl(MSR_IA32_POWER_CTL, msr_bits);
97032e95180SLen Brown }
97114796fcaSLen Brown 
972b66b8b9aSAndi Kleen static const struct idle_cpu idle_cpu_nehalem = {
973b66b8b9aSAndi Kleen 	.state_table = nehalem_cstates,
974b66b8b9aSAndi Kleen 	.auto_demotion_disable_flags = NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE,
97532e95180SLen Brown 	.disable_promotion_to_c1e = true,
976b66b8b9aSAndi Kleen };
977b66b8b9aSAndi Kleen 
978b66b8b9aSAndi Kleen static const struct idle_cpu idle_cpu_atom = {
979b66b8b9aSAndi Kleen 	.state_table = atom_cstates,
980b66b8b9aSAndi Kleen };
981b66b8b9aSAndi Kleen 
9825e7ec268SAndy Shevchenko static const struct idle_cpu idle_cpu_tangier = {
9835e7ec268SAndy Shevchenko 	.state_table = tangier_cstates,
9845e7ec268SAndy Shevchenko };
9855e7ec268SAndy Shevchenko 
986b66b8b9aSAndi Kleen static const struct idle_cpu idle_cpu_lincroft = {
987b66b8b9aSAndi Kleen 	.state_table = atom_cstates,
988b66b8b9aSAndi Kleen 	.auto_demotion_disable_flags = ATM_LNC_C6_AUTO_DEMOTE,
989b66b8b9aSAndi Kleen };
990b66b8b9aSAndi Kleen 
991b66b8b9aSAndi Kleen static const struct idle_cpu idle_cpu_snb = {
992b66b8b9aSAndi Kleen 	.state_table = snb_cstates,
99332e95180SLen Brown 	.disable_promotion_to_c1e = true,
994b66b8b9aSAndi Kleen };
995b66b8b9aSAndi Kleen 
996718987d6SLen Brown static const struct idle_cpu idle_cpu_byt = {
997718987d6SLen Brown 	.state_table = byt_cstates,
998718987d6SLen Brown 	.disable_promotion_to_c1e = true,
9998c058d53SLen Brown 	.byt_auto_demotion_disable_flag = true,
1000718987d6SLen Brown };
1001718987d6SLen Brown 
1002cab07a56SLen Brown static const struct idle_cpu idle_cpu_cht = {
1003cab07a56SLen Brown 	.state_table = cht_cstates,
1004cab07a56SLen Brown 	.disable_promotion_to_c1e = true,
1005cab07a56SLen Brown 	.byt_auto_demotion_disable_flag = true,
1006cab07a56SLen Brown };
1007cab07a56SLen Brown 
10086edab08cSLen Brown static const struct idle_cpu idle_cpu_ivb = {
10096edab08cSLen Brown 	.state_table = ivb_cstates,
101032e95180SLen Brown 	.disable_promotion_to_c1e = true,
10116edab08cSLen Brown };
10126edab08cSLen Brown 
10130138d8f0SLen Brown static const struct idle_cpu idle_cpu_ivt = {
10140138d8f0SLen Brown 	.state_table = ivt_cstates,
10150138d8f0SLen Brown 	.disable_promotion_to_c1e = true,
10160138d8f0SLen Brown };
10170138d8f0SLen Brown 
101885a4d2d4SLen Brown static const struct idle_cpu idle_cpu_hsw = {
101985a4d2d4SLen Brown 	.state_table = hsw_cstates,
102032e95180SLen Brown 	.disable_promotion_to_c1e = true,
102185a4d2d4SLen Brown };
102285a4d2d4SLen Brown 
1023a138b568SLen Brown static const struct idle_cpu idle_cpu_bdw = {
1024a138b568SLen Brown 	.state_table = bdw_cstates,
1025a138b568SLen Brown 	.disable_promotion_to_c1e = true,
1026a138b568SLen Brown };
1027a138b568SLen Brown 
1028493f133fSLen Brown static const struct idle_cpu idle_cpu_skl = {
1029493f133fSLen Brown 	.state_table = skl_cstates,
1030493f133fSLen Brown 	.disable_promotion_to_c1e = true,
1031493f133fSLen Brown };
1032493f133fSLen Brown 
1033f9e71657SLen Brown static const struct idle_cpu idle_cpu_skx = {
1034f9e71657SLen Brown 	.state_table = skx_cstates,
1035f9e71657SLen Brown 	.disable_promotion_to_c1e = true,
1036f9e71657SLen Brown };
1037493f133fSLen Brown 
1038fab04b22SLen Brown static const struct idle_cpu idle_cpu_avn = {
1039fab04b22SLen Brown 	.state_table = avn_cstates,
1040fab04b22SLen Brown 	.disable_promotion_to_c1e = true,
1041fab04b22SLen Brown };
1042fab04b22SLen Brown 
1043281baf7aSDasaratharaman Chandramouli static const struct idle_cpu idle_cpu_knl = {
1044281baf7aSDasaratharaman Chandramouli 	.state_table = knl_cstates,
1045281baf7aSDasaratharaman Chandramouli };
1046281baf7aSDasaratharaman Chandramouli 
10475dcef694SLen Brown static const struct idle_cpu idle_cpu_bxt = {
10485dcef694SLen Brown 	.state_table = bxt_cstates,
10495dcef694SLen Brown 	.disable_promotion_to_c1e = true,
10505dcef694SLen Brown };
10515dcef694SLen Brown 
10520080d65bSJacob Pan static const struct idle_cpu idle_cpu_dnv = {
10530080d65bSJacob Pan 	.state_table = dnv_cstates,
10540080d65bSJacob Pan 	.disable_promotion_to_c1e = true,
10550080d65bSJacob Pan };
10560080d65bSJacob Pan 
1057d5cdc3c4SMathias Krause static const struct x86_cpu_id intel_idle_ids[] __initconst = {
1058a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(NEHALEM_EP,		idle_cpu_nehalem),
1059a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(NEHALEM,			idle_cpu_nehalem),
1060a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(NEHALEM_G,		idle_cpu_nehalem),
1061a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(WESTMERE,		idle_cpu_nehalem),
1062a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(WESTMERE_EP,		idle_cpu_nehalem),
1063a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(NEHALEM_EX,		idle_cpu_nehalem),
1064c05f3642SLinus Torvalds 	INTEL_CPU_FAM6(ATOM_BONNELL,		idle_cpu_atom),
1065c05f3642SLinus Torvalds 	INTEL_CPU_FAM6(ATOM_BONNELL_MID,	idle_cpu_lincroft),
1066a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(WESTMERE_EX,		idle_cpu_nehalem),
1067a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(SANDYBRIDGE,		idle_cpu_snb),
1068a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(SANDYBRIDGE_X,		idle_cpu_snb),
1069c05f3642SLinus Torvalds 	INTEL_CPU_FAM6(ATOM_SALTWELL,		idle_cpu_atom),
1070c05f3642SLinus Torvalds 	INTEL_CPU_FAM6(ATOM_SILVERMONT,		idle_cpu_byt),
1071c05f3642SLinus Torvalds 	INTEL_CPU_FAM6(ATOM_SILVERMONT_MID,	idle_cpu_tangier),
1072a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(ATOM_AIRMONT,		idle_cpu_cht),
1073a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(IVYBRIDGE,		idle_cpu_ivb),
1074a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(IVYBRIDGE_X,		idle_cpu_ivt),
1075c66f78a6SPeter Zijlstra 	INTEL_CPU_FAM6(HASWELL,			idle_cpu_hsw),
1076a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(HASWELL_X,		idle_cpu_hsw),
1077af239c44SPeter Zijlstra 	INTEL_CPU_FAM6(HASWELL_L,		idle_cpu_hsw),
10785e741407SPeter Zijlstra 	INTEL_CPU_FAM6(HASWELL_G,		idle_cpu_hsw),
10795ebb34edSPeter Zijlstra 	INTEL_CPU_FAM6(ATOM_SILVERMONT_D,	idle_cpu_avn),
1080c66f78a6SPeter Zijlstra 	INTEL_CPU_FAM6(BROADWELL,		idle_cpu_bdw),
10815e741407SPeter Zijlstra 	INTEL_CPU_FAM6(BROADWELL_G,		idle_cpu_bdw),
1082a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(BROADWELL_X,		idle_cpu_bdw),
10835ebb34edSPeter Zijlstra 	INTEL_CPU_FAM6(BROADWELL_D,		idle_cpu_bdw),
1084af239c44SPeter Zijlstra 	INTEL_CPU_FAM6(SKYLAKE_L,		idle_cpu_skl),
1085c66f78a6SPeter Zijlstra 	INTEL_CPU_FAM6(SKYLAKE,			idle_cpu_skl),
1086af239c44SPeter Zijlstra 	INTEL_CPU_FAM6(KABYLAKE_L,		idle_cpu_skl),
1087c66f78a6SPeter Zijlstra 	INTEL_CPU_FAM6(KABYLAKE,		idle_cpu_skl),
1088a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(SKYLAKE_X,		idle_cpu_skx),
1089a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(XEON_PHI_KNL,		idle_cpu_knl),
1090a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(XEON_PHI_KNM,		idle_cpu_knl),
1091a4a008e5SAndy Shevchenko 	INTEL_CPU_FAM6(ATOM_GOLDMONT,		idle_cpu_bxt),
1092c05f3642SLinus Torvalds 	INTEL_CPU_FAM6(ATOM_GOLDMONT_PLUS,	idle_cpu_bxt),
10935ebb34edSPeter Zijlstra 	INTEL_CPU_FAM6(ATOM_GOLDMONT_D,		idle_cpu_dnv),
10945ebb34edSPeter Zijlstra 	INTEL_CPU_FAM6(ATOM_TREMONT_D,		idle_cpu_dnv),
1095b66b8b9aSAndi Kleen 	{}
1096b66b8b9aSAndi Kleen };
1097b66b8b9aSAndi Kleen 
109826717172SLen Brown /*
109926717172SLen Brown  * intel_idle_probe()
110026717172SLen Brown  */
110100f3e755SBartlomiej Zolnierkiewicz static int __init intel_idle_probe(void)
110226717172SLen Brown {
1103c4236282SLen Brown 	unsigned int eax, ebx, ecx;
1104b66b8b9aSAndi Kleen 	const struct x86_cpu_id *id;
110526717172SLen Brown 
110626717172SLen Brown 	if (max_cstate == 0) {
1107654d08a4SJoe Perches 		pr_debug("disabled\n");
110826717172SLen Brown 		return -EPERM;
110926717172SLen Brown 	}
111026717172SLen Brown 
1111b66b8b9aSAndi Kleen 	id = x86_match_cpu(intel_idle_ids);
1112b66b8b9aSAndi Kleen 	if (!id) {
1113b66b8b9aSAndi Kleen 		if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
1114b66b8b9aSAndi Kleen 		    boot_cpu_data.x86 == 6)
1115654d08a4SJoe Perches 			pr_debug("does not run on family %d model %d\n",
1116b66b8b9aSAndi Kleen 				 boot_cpu_data.x86, boot_cpu_data.x86_model);
111726717172SLen Brown 		return -ENODEV;
1118b66b8b9aSAndi Kleen 	}
111926717172SLen Brown 
1120a4c44753SLen Brown 	if (!boot_cpu_has(X86_FEATURE_MWAIT)) {
1121a4c44753SLen Brown 		pr_debug("Please enable MWAIT in BIOS SETUP\n");
1122a4c44753SLen Brown 		return -ENODEV;
1123a4c44753SLen Brown 	}
1124a4c44753SLen Brown 
112526717172SLen Brown 	if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF)
112626717172SLen Brown 		return -ENODEV;
112726717172SLen Brown 
1128c4236282SLen Brown 	cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates);
112926717172SLen Brown 
113026717172SLen Brown 	if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) ||
11315c2a9f06SThomas Renninger 	    !(ecx & CPUID5_ECX_INTERRUPT_BREAK) ||
11325c2a9f06SThomas Renninger 	    !mwait_substates)
113326717172SLen Brown 			return -ENODEV;
113426717172SLen Brown 
1135654d08a4SJoe Perches 	pr_debug("MWAIT substates: 0x%x\n", mwait_substates);
113626717172SLen Brown 
1137b66b8b9aSAndi Kleen 	icpu = (const struct idle_cpu *)id->driver_data;
1138b66b8b9aSAndi Kleen 	cpuidle_state_table = icpu->state_table;
113926717172SLen Brown 
1140654d08a4SJoe Perches 	pr_debug("v" INTEL_IDLE_VERSION " model 0x%X\n",
1141654d08a4SJoe Perches 		 boot_cpu_data.x86_model);
114226717172SLen Brown 
114326717172SLen Brown 	return 0;
114426717172SLen Brown }
114526717172SLen Brown 
114626717172SLen Brown /*
114726717172SLen Brown  * intel_idle_cpuidle_devices_uninit()
1148ca42489dSRichard Cochran  * Unregisters the cpuidle devices.
114926717172SLen Brown  */
115026717172SLen Brown static void intel_idle_cpuidle_devices_uninit(void)
115126717172SLen Brown {
115226717172SLen Brown 	int i;
115326717172SLen Brown 	struct cpuidle_device *dev;
115426717172SLen Brown 
115526717172SLen Brown 	for_each_online_cpu(i) {
115626717172SLen Brown 		dev = per_cpu_ptr(intel_idle_cpuidle_devices, i);
115726717172SLen Brown 		cpuidle_unregister_device(dev);
115826717172SLen Brown 	}
115926717172SLen Brown }
11600138d8f0SLen Brown 
11610138d8f0SLen Brown /*
1162d70e28f5SLen Brown  * ivt_idle_state_table_update(void)
11630138d8f0SLen Brown  *
1164d70e28f5SLen Brown  * Tune IVT multi-socket targets
11650138d8f0SLen Brown  * Assumption: num_sockets == (max_package_num + 1)
11660138d8f0SLen Brown  */
1167d70e28f5SLen Brown static void ivt_idle_state_table_update(void)
11680138d8f0SLen Brown {
11690138d8f0SLen Brown 	/* IVT uses a different table for 1-2, 3-4, and > 4 sockets */
11700138d8f0SLen Brown 	int cpu, package_num, num_sockets = 1;
11710138d8f0SLen Brown 
11720138d8f0SLen Brown 	for_each_online_cpu(cpu) {
11730138d8f0SLen Brown 		package_num = topology_physical_package_id(cpu);
11740138d8f0SLen Brown 		if (package_num + 1 > num_sockets) {
11750138d8f0SLen Brown 			num_sockets = package_num + 1;
11760138d8f0SLen Brown 
1177d27dca42SChristoph Jaeger 			if (num_sockets > 4) {
11780138d8f0SLen Brown 				cpuidle_state_table = ivt_cstates_8s;
11790138d8f0SLen Brown 				return;
11800138d8f0SLen Brown 			}
11810138d8f0SLen Brown 		}
1182d27dca42SChristoph Jaeger 	}
11830138d8f0SLen Brown 
11840138d8f0SLen Brown 	if (num_sockets > 2)
11850138d8f0SLen Brown 		cpuidle_state_table = ivt_cstates_4s;
1186d70e28f5SLen Brown 
11870138d8f0SLen Brown 	/* else, 1 and 2 socket systems use default ivt_cstates */
11880138d8f0SLen Brown }
11895dcef694SLen Brown 
11905dcef694SLen Brown /*
11915dcef694SLen Brown  * Translate IRTL (Interrupt Response Time Limit) MSR to usec
11925dcef694SLen Brown  */
11935dcef694SLen Brown 
11945dcef694SLen Brown static unsigned int irtl_ns_units[] = {
11955dcef694SLen Brown 	1, 32, 1024, 32768, 1048576, 33554432, 0, 0 };
11965dcef694SLen Brown 
11975dcef694SLen Brown static unsigned long long irtl_2_usec(unsigned long long irtl)
11985dcef694SLen Brown {
11995dcef694SLen Brown 	unsigned long long ns;
12005dcef694SLen Brown 
12013451ab3eSJan Beulich 	if (!irtl)
12023451ab3eSJan Beulich 		return 0;
12033451ab3eSJan Beulich 
1204bef45096SJan Beulich 	ns = irtl_ns_units[(irtl >> 10) & 0x7];
12055dcef694SLen Brown 
12065dcef694SLen Brown 	return div64_u64((irtl & 0x3FF) * ns, 1000);
12075dcef694SLen Brown }
12085dcef694SLen Brown /*
12095dcef694SLen Brown  * bxt_idle_state_table_update(void)
12105dcef694SLen Brown  *
12115dcef694SLen Brown  * On BXT, we trust the IRTL to show the definitive maximum latency
12125dcef694SLen Brown  * We use the same value for target_residency.
12135dcef694SLen Brown  */
12145dcef694SLen Brown static void bxt_idle_state_table_update(void)
12155dcef694SLen Brown {
12165dcef694SLen Brown 	unsigned long long msr;
12173451ab3eSJan Beulich 	unsigned int usec;
12185dcef694SLen Brown 
12195dcef694SLen Brown 	rdmsrl(MSR_PKGC6_IRTL, msr);
12203451ab3eSJan Beulich 	usec = irtl_2_usec(msr);
12213451ab3eSJan Beulich 	if (usec) {
12225dcef694SLen Brown 		bxt_cstates[2].exit_latency = usec;
12235dcef694SLen Brown 		bxt_cstates[2].target_residency = usec;
12245dcef694SLen Brown 	}
12255dcef694SLen Brown 
12265dcef694SLen Brown 	rdmsrl(MSR_PKGC7_IRTL, msr);
12273451ab3eSJan Beulich 	usec = irtl_2_usec(msr);
12283451ab3eSJan Beulich 	if (usec) {
12295dcef694SLen Brown 		bxt_cstates[3].exit_latency = usec;
12305dcef694SLen Brown 		bxt_cstates[3].target_residency = usec;
12315dcef694SLen Brown 	}
12325dcef694SLen Brown 
12335dcef694SLen Brown 	rdmsrl(MSR_PKGC8_IRTL, msr);
12343451ab3eSJan Beulich 	usec = irtl_2_usec(msr);
12353451ab3eSJan Beulich 	if (usec) {
12365dcef694SLen Brown 		bxt_cstates[4].exit_latency = usec;
12375dcef694SLen Brown 		bxt_cstates[4].target_residency = usec;
12385dcef694SLen Brown 	}
12395dcef694SLen Brown 
12405dcef694SLen Brown 	rdmsrl(MSR_PKGC9_IRTL, msr);
12413451ab3eSJan Beulich 	usec = irtl_2_usec(msr);
12423451ab3eSJan Beulich 	if (usec) {
12435dcef694SLen Brown 		bxt_cstates[5].exit_latency = usec;
12445dcef694SLen Brown 		bxt_cstates[5].target_residency = usec;
12455dcef694SLen Brown 	}
12465dcef694SLen Brown 
12475dcef694SLen Brown 	rdmsrl(MSR_PKGC10_IRTL, msr);
12483451ab3eSJan Beulich 	usec = irtl_2_usec(msr);
12493451ab3eSJan Beulich 	if (usec) {
12505dcef694SLen Brown 		bxt_cstates[6].exit_latency = usec;
12515dcef694SLen Brown 		bxt_cstates[6].target_residency = usec;
12525dcef694SLen Brown 	}
12535dcef694SLen Brown 
12545dcef694SLen Brown }
1255d70e28f5SLen Brown /*
1256d70e28f5SLen Brown  * sklh_idle_state_table_update(void)
1257d70e28f5SLen Brown  *
1258d70e28f5SLen Brown  * On SKL-H (model 0x5e) disable C8 and C9 if:
1259d70e28f5SLen Brown  * C10 is enabled and SGX disabled
1260d70e28f5SLen Brown  */
1261d70e28f5SLen Brown static void sklh_idle_state_table_update(void)
1262d70e28f5SLen Brown {
1263d70e28f5SLen Brown 	unsigned long long msr;
1264d70e28f5SLen Brown 	unsigned int eax, ebx, ecx, edx;
1265d70e28f5SLen Brown 
1266d70e28f5SLen Brown 
1267d70e28f5SLen Brown 	/* if PC10 disabled via cmdline intel_idle.max_cstate=7 or shallower */
1268d70e28f5SLen Brown 	if (max_cstate <= 7)
12690138d8f0SLen Brown 		return;
1270d70e28f5SLen Brown 
1271d70e28f5SLen Brown 	/* if PC10 not present in CPUID.MWAIT.EDX */
1272d70e28f5SLen Brown 	if ((mwait_substates & (0xF << 28)) == 0)
1273d70e28f5SLen Brown 		return;
1274d70e28f5SLen Brown 
12756cfb2374SLen Brown 	rdmsrl(MSR_PKG_CST_CONFIG_CONTROL, msr);
1276d70e28f5SLen Brown 
1277d70e28f5SLen Brown 	/* PC10 is not enabled in PKG C-state limit */
1278d70e28f5SLen Brown 	if ((msr & 0xF) != 8)
1279d70e28f5SLen Brown 		return;
1280d70e28f5SLen Brown 
1281d70e28f5SLen Brown 	ecx = 0;
1282d70e28f5SLen Brown 	cpuid(7, &eax, &ebx, &ecx, &edx);
1283d70e28f5SLen Brown 
1284d70e28f5SLen Brown 	/* if SGX is present */
1285d70e28f5SLen Brown 	if (ebx & (1 << 2)) {
1286d70e28f5SLen Brown 
128732ad73dbSSean Christopherson 		rdmsrl(MSR_IA32_FEAT_CTL, msr);
1288d70e28f5SLen Brown 
1289d70e28f5SLen Brown 		/* if SGX is enabled */
1290d70e28f5SLen Brown 		if (msr & (1 << 18))
1291d70e28f5SLen Brown 			return;
1292d70e28f5SLen Brown 	}
1293d70e28f5SLen Brown 
1294ba1e78a1SRafael J. Wysocki 	skl_cstates[5].flags |= CPUIDLE_FLAG_UNUSABLE;	/* C8-SKL */
1295ba1e78a1SRafael J. Wysocki 	skl_cstates[6].flags |= CPUIDLE_FLAG_UNUSABLE;	/* C9-SKL */
1296d70e28f5SLen Brown }
1297d70e28f5SLen Brown /*
1298d70e28f5SLen Brown  * intel_idle_state_table_update()
1299d70e28f5SLen Brown  *
1300d70e28f5SLen Brown  * Update the default state_table for this CPU-id
1301d70e28f5SLen Brown  */
1302d70e28f5SLen Brown 
1303d70e28f5SLen Brown static void intel_idle_state_table_update(void)
1304d70e28f5SLen Brown {
1305d70e28f5SLen Brown 	switch (boot_cpu_data.x86_model) {
1306d70e28f5SLen Brown 
1307db73c5a8SDave Hansen 	case INTEL_FAM6_IVYBRIDGE_X:
1308d70e28f5SLen Brown 		ivt_idle_state_table_update();
1309d70e28f5SLen Brown 		break;
1310db73c5a8SDave Hansen 	case INTEL_FAM6_ATOM_GOLDMONT:
1311f2c4db1bSPeter Zijlstra 	case INTEL_FAM6_ATOM_GOLDMONT_PLUS:
13125dcef694SLen Brown 		bxt_idle_state_table_update();
13135dcef694SLen Brown 		break;
1314c66f78a6SPeter Zijlstra 	case INTEL_FAM6_SKYLAKE:
1315d70e28f5SLen Brown 		sklh_idle_state_table_update();
1316d70e28f5SLen Brown 		break;
1317d70e28f5SLen Brown 	}
13180138d8f0SLen Brown }
13190138d8f0SLen Brown 
132026717172SLen Brown /*
132146bcfad7SDeepthi Dharwar  * intel_idle_cpuidle_driver_init()
132246bcfad7SDeepthi Dharwar  * allocate, initialize cpuidle_states
132346bcfad7SDeepthi Dharwar  */
13245469c827SRichard Cochran static void __init intel_idle_cpuidle_driver_init(void)
132546bcfad7SDeepthi Dharwar {
132646bcfad7SDeepthi Dharwar 	int cstate;
132746bcfad7SDeepthi Dharwar 	struct cpuidle_driver *drv = &intel_idle_driver;
132846bcfad7SDeepthi Dharwar 
13290138d8f0SLen Brown 	intel_idle_state_table_update();
13300138d8f0SLen Brown 
13311b39e3f8SRafael J. Wysocki 	cpuidle_poll_state_init(drv);
133246bcfad7SDeepthi Dharwar 	drv->state_count = 1;
133346bcfad7SDeepthi Dharwar 
1334e022e7ebSLen Brown 	for (cstate = 0; cstate < CPUIDLE_STATE_MAX; ++cstate) {
133524bfa950SLen Brown 		int num_substates, mwait_hint, mwait_cstate;
133646bcfad7SDeepthi Dharwar 
13377dd0e0afSLen Brown 		if ((cpuidle_state_table[cstate].enter == NULL) &&
133828ba086eSRafael J. Wysocki 		    (cpuidle_state_table[cstate].enter_s2idle == NULL))
1339e022e7ebSLen Brown 			break;
1340e022e7ebSLen Brown 
1341e022e7ebSLen Brown 		if (cstate + 1 > max_cstate) {
1342654d08a4SJoe Perches 			pr_info("max_cstate %d reached\n", max_cstate);
134346bcfad7SDeepthi Dharwar 			break;
134446bcfad7SDeepthi Dharwar 		}
134546bcfad7SDeepthi Dharwar 
1346e022e7ebSLen Brown 		mwait_hint = flg2MWAIT(cpuidle_state_table[cstate].flags);
1347e022e7ebSLen Brown 		mwait_cstate = MWAIT_HINT2CSTATE(mwait_hint);
134846bcfad7SDeepthi Dharwar 
134924bfa950SLen Brown 		/* number of sub-states for this state in CPUID.MWAIT */
1350e022e7ebSLen Brown 		num_substates = (mwait_substates >> ((mwait_cstate + 1) * 4))
1351e022e7ebSLen Brown 					& MWAIT_SUBSTATE_MASK;
1352e022e7ebSLen Brown 
135324bfa950SLen Brown 		/* if NO sub-states for this state in CPUID, skip it */
135424bfa950SLen Brown 		if (num_substates == 0)
1355e022e7ebSLen Brown 			continue;
1356e022e7ebSLen Brown 
1357d70e28f5SLen Brown 		/* if state marked as disabled, skip it */
1358ba1e78a1SRafael J. Wysocki 		if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_UNUSABLE) {
1359654d08a4SJoe Perches 			pr_debug("state %s is disabled\n",
1360d70e28f5SLen Brown 				 cpuidle_state_table[cstate].name);
1361d70e28f5SLen Brown 			continue;
1362d70e28f5SLen Brown 		}
1363d70e28f5SLen Brown 
1364d70e28f5SLen Brown 
1365e022e7ebSLen Brown 		if (((mwait_cstate + 1) > 2) &&
136646bcfad7SDeepthi Dharwar 			!boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
136746bcfad7SDeepthi Dharwar 			mark_tsc_unstable("TSC halts in idle"
136846bcfad7SDeepthi Dharwar 					" states deeper than C2");
136946bcfad7SDeepthi Dharwar 
137046bcfad7SDeepthi Dharwar 		drv->states[drv->state_count] =	/* structure copy */
137146bcfad7SDeepthi Dharwar 			cpuidle_state_table[cstate];
137246bcfad7SDeepthi Dharwar 
137346bcfad7SDeepthi Dharwar 		drv->state_count += 1;
137446bcfad7SDeepthi Dharwar 	}
137546bcfad7SDeepthi Dharwar 
13768c058d53SLen Brown 	if (icpu->byt_auto_demotion_disable_flag) {
13778c058d53SLen Brown 		wrmsrl(MSR_CC6_DEMOTION_POLICY_CONFIG, 0);
13788c058d53SLen Brown 		wrmsrl(MSR_MC6_DEMOTION_POLICY_CONFIG, 0);
13798c058d53SLen Brown 	}
138046bcfad7SDeepthi Dharwar }
138146bcfad7SDeepthi Dharwar 
138246bcfad7SDeepthi Dharwar 
138346bcfad7SDeepthi Dharwar /*
138465b7f839SThomas Renninger  * intel_idle_cpu_init()
138526717172SLen Brown  * allocate, initialize, register cpuidle_devices
138665b7f839SThomas Renninger  * @cpu: cpu/core to initialize
138726717172SLen Brown  */
1388fb1013a0SSebastian Andrzej Siewior static int intel_idle_cpu_init(unsigned int cpu)
138926717172SLen Brown {
139026717172SLen Brown 	struct cpuidle_device *dev;
139126717172SLen Brown 
139265b7f839SThomas Renninger 	dev = per_cpu_ptr(intel_idle_cpuidle_devices, cpu);
139365b7f839SThomas Renninger 	dev->cpu = cpu;
139426717172SLen Brown 
139526717172SLen Brown 	if (cpuidle_register_device(dev)) {
1396654d08a4SJoe Perches 		pr_debug("cpuidle_register_device %d failed!\n", cpu);
139726717172SLen Brown 		return -EIO;
139826717172SLen Brown 	}
139965b7f839SThomas Renninger 
1400b66b8b9aSAndi Kleen 	if (icpu->auto_demotion_disable_flags)
1401fb1013a0SSebastian Andrzej Siewior 		auto_demotion_disable();
140226717172SLen Brown 
1403dbf87ab8SBartlomiej Zolnierkiewicz 	if (icpu->disable_promotion_to_c1e)
1404fb1013a0SSebastian Andrzej Siewior 		c1e_promotion_disable();
1405fb1013a0SSebastian Andrzej Siewior 
1406fb1013a0SSebastian Andrzej Siewior 	return 0;
1407fb1013a0SSebastian Andrzej Siewior }
1408fb1013a0SSebastian Andrzej Siewior 
1409fb1013a0SSebastian Andrzej Siewior static int intel_idle_cpu_online(unsigned int cpu)
1410fb1013a0SSebastian Andrzej Siewior {
1411fb1013a0SSebastian Andrzej Siewior 	struct cpuidle_device *dev;
1412fb1013a0SSebastian Andrzej Siewior 
1413fb1013a0SSebastian Andrzej Siewior 	if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
1414fb1013a0SSebastian Andrzej Siewior 		__setup_broadcast_timer(true);
1415fb1013a0SSebastian Andrzej Siewior 
1416fb1013a0SSebastian Andrzej Siewior 	/*
1417fb1013a0SSebastian Andrzej Siewior 	 * Some systems can hotplug a cpu at runtime after
1418fb1013a0SSebastian Andrzej Siewior 	 * the kernel has booted, we have to initialize the
1419fb1013a0SSebastian Andrzej Siewior 	 * driver in this case
1420fb1013a0SSebastian Andrzej Siewior 	 */
1421fb1013a0SSebastian Andrzej Siewior 	dev = per_cpu_ptr(intel_idle_cpuidle_devices, cpu);
1422fb1013a0SSebastian Andrzej Siewior 	if (!dev->registered)
1423fb1013a0SSebastian Andrzej Siewior 		return intel_idle_cpu_init(cpu);
1424dbf87ab8SBartlomiej Zolnierkiewicz 
142526717172SLen Brown 	return 0;
142626717172SLen Brown }
142726717172SLen Brown 
142826717172SLen Brown static int __init intel_idle_init(void)
142926717172SLen Brown {
1430fb1013a0SSebastian Andrzej Siewior 	int retval;
143126717172SLen Brown 
1432d1896049SThomas Renninger 	/* Do not load intel_idle at all for now if idle= is passed */
1433d1896049SThomas Renninger 	if (boot_option_idle_override != IDLE_NO_OVERRIDE)
1434d1896049SThomas Renninger 		return -ENODEV;
1435d1896049SThomas Renninger 
143626717172SLen Brown 	retval = intel_idle_probe();
143726717172SLen Brown 	if (retval)
143826717172SLen Brown 		return retval;
143926717172SLen Brown 
1440e9df69ccSRichard Cochran 	intel_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device);
1441e9df69ccSRichard Cochran 	if (intel_idle_cpuidle_devices == NULL)
1442e9df69ccSRichard Cochran 		return -ENOMEM;
1443e9df69ccSRichard Cochran 
144446bcfad7SDeepthi Dharwar 	intel_idle_cpuidle_driver_init();
144526717172SLen Brown 	retval = cpuidle_register_driver(&intel_idle_driver);
144626717172SLen Brown 	if (retval) {
14473735d524SKonrad Rzeszutek Wilk 		struct cpuidle_driver *drv = cpuidle_get_driver();
1448654d08a4SJoe Perches 		printk(KERN_DEBUG pr_fmt("intel_idle yielding to %s\n"),
14493735d524SKonrad Rzeszutek Wilk 		       drv ? drv->name : "none");
1450fb1013a0SSebastian Andrzej Siewior 		goto init_driver_fail;
145126717172SLen Brown 	}
145226717172SLen Brown 
14532259a819SRichard Cochran 	if (boot_cpu_has(X86_FEATURE_ARAT))	/* Always Reliable APIC Timer */
14542259a819SRichard Cochran 		lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE;
14552259a819SRichard Cochran 
1456fb1013a0SSebastian Andrzej Siewior 	retval = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "idle/intel:online",
1457fb1013a0SSebastian Andrzej Siewior 				   intel_idle_cpu_online, NULL);
1458fb1013a0SSebastian Andrzej Siewior 	if (retval < 0)
1459fb1013a0SSebastian Andrzej Siewior 		goto hp_setup_fail;
146026717172SLen Brown 
1461654d08a4SJoe Perches 	pr_debug("lapic_timer_reliable_states 0x%x\n",
14622259a819SRichard Cochran 		 lapic_timer_reliable_states);
14632259a819SRichard Cochran 
146426717172SLen Brown 	return 0;
1465fb1013a0SSebastian Andrzej Siewior 
1466fb1013a0SSebastian Andrzej Siewior hp_setup_fail:
1467fb1013a0SSebastian Andrzej Siewior 	intel_idle_cpuidle_devices_uninit();
1468fb1013a0SSebastian Andrzej Siewior 	cpuidle_unregister_driver(&intel_idle_driver);
1469fb1013a0SSebastian Andrzej Siewior init_driver_fail:
1470fb1013a0SSebastian Andrzej Siewior 	free_percpu(intel_idle_cpuidle_devices);
1471fb1013a0SSebastian Andrzej Siewior 	return retval;
1472fb1013a0SSebastian Andrzej Siewior 
147326717172SLen Brown }
147402c4fae9SPaul Gortmaker device_initcall(intel_idle_init);
147526717172SLen Brown 
147602c4fae9SPaul Gortmaker /*
147702c4fae9SPaul Gortmaker  * We are not really modular, but we used to support that.  Meaning we also
147802c4fae9SPaul Gortmaker  * support "intel_idle.max_cstate=..." at boot and also a read-only export of
147902c4fae9SPaul Gortmaker  * it at /sys/module/intel_idle/parameters/max_cstate -- so using module_param
148002c4fae9SPaul Gortmaker  * is the easiest way (currently) to continue doing that.
148102c4fae9SPaul Gortmaker  */
148226717172SLen Brown module_param(max_cstate, int, 0444);
1483