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	1	/*
	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	#ifndef _MACH_TASK_POLICY_H_
	30	#define _MACH_TASK_POLICY_H_
	31
	32	#include <mach/mach_types.h>
	33
	34	/*
	35	* These are the calls for accessing the policy parameters
	36	* of a particular task.
	37	*
	38	* The extra 'get_default' parameter to the second call is
	39	* IN/OUT as follows:
	40	* 1) if asserted on the way in it indicates that the default
	41	* values should be returned, not the ones currently set, in
	42	* this case 'get_default' will always be asserted on return;
	43	* 2) if unasserted on the way in, the current settings are
	44	* desired and if still unasserted on return, then the info
	45	* returned reflects the current settings, otherwise if
	46	* 'get_default' returns asserted, it means that there are no
	47	* current settings due to other parameters taking precedence,
	48	* and the default ones are being returned instead.
	49	*/
	50
	51	typedef natural_t task_policy_flavor_t;
	52	typedef integer_t *task_policy_t;
	53
	54	/*
	55	kern_return_t task_policy_set(
	56	task_t task,
	57	task_policy_flavor_t flavor,
	58	task_policy_t policy_info,
	59	mach_msg_type_number_t count);
	60
	61	kern_return_t task_policy_get(
	62	task_t task,
	63	task_policy_flavor_t flavor,
	64	task_policy_t policy_info,
	65	mach_msg_type_number_t *count,
	66	boolean_t *get_default);
	67	*/
	68
	69	/*
	70	* Defined flavors.
	71	*/
	72	/*
	73	* TASK_CATEGORY_POLICY:
	74	*
	75	* This provides information to the kernel about the role
	76	* of the task in the system.
	77	*
	78	* Parameters:
	79	*
	80	* role: Enumerated as follows:
	81	*
	82	* TASK_UNSPECIFIED is the default, since the role is not
	83	* inherited from the parent.
	84	*
	85	* TASK_FOREGROUND_APPLICATION should be assigned when the
	86	* task is a normal UI application in the foreground from
	87	* the HI point of view.
	88	* **N.B. There may be more than one of these at a given time.
	89	*
	90	* TASK_BACKGROUND_APPLICATION should be assigned when the
	91	* task is a normal UI application in the background from
	92	* the HI point of view.
	93	*
	94	* TASK_CONTROL_APPLICATION should be assigned to the unique
	95	* UI application which implements the pop-up application dialog.
	96	* There can only be one task at a time with this designation,
	97	* which is assigned FCFS.
	98	*
	99	* TASK_GRAPHICS_SERVER should be assigned to the graphics
	100	* management (window) server. There can only be one task at
	101	* a time with this designation, which is assigned FCFS.
	102	*/
	103
	104	#define TASK_CATEGORY_POLICY 1
	105
	106	#define TASK_SUPPRESSION_POLICY 3
	107	#define TASK_POLICY_STATE 4
	108	#define TASK_BASE_QOS_POLICY 8
	109	#define TASK_OVERRIDE_QOS_POLICY 9
	110	#define TASK_BASE_LATENCY_QOS_POLICY 10
	111	#define TASK_BASE_THROUGHPUT_QOS_POLICY 11
	112
	113
	114	enum task_role {
	115	TASK_RENICED = -1,
	116	TASK_UNSPECIFIED = 0,
	117	TASK_FOREGROUND_APPLICATION,
	118	TASK_BACKGROUND_APPLICATION,
	119	TASK_CONTROL_APPLICATION,
	120	TASK_GRAPHICS_SERVER,
	121	TASK_THROTTLE_APPLICATION,
	122	TASK_NONUI_APPLICATION,
	123	TASK_DEFAULT_APPLICATION
	124	};
	125
	126	typedef integer_t task_role_t;
	127
	128	struct task_category_policy {
	129	task_role_t role;
	130	};
	131
	132	typedef struct task_category_policy task_category_policy_data_t;
	133	typedef struct task_category_policy *task_category_policy_t;
	134
	135	#define TASK_CATEGORY_POLICY_COUNT ((mach_msg_type_number_t) \
	136	(sizeof (task_category_policy_data_t) / sizeof (integer_t)))
	137
	138
	139	enum task_latency_qos {
	140	LATENCY_QOS_TIER_UNSPECIFIED = 0x0,
	141	LATENCY_QOS_TIER_0 = ((0xFF<<16) \| 1),
	142	LATENCY_QOS_TIER_1 = ((0xFF<<16) \| 2),
	143	LATENCY_QOS_TIER_2 = ((0xFF<<16) \| 3),
	144	LATENCY_QOS_TIER_3 = ((0xFF<<16) \| 4),
	145	LATENCY_QOS_TIER_4 = ((0xFF<<16) \| 5),
	146	LATENCY_QOS_TIER_5 = ((0xFF<<16) \| 6)
	147
	148	};
	149	typedef integer_t task_latency_qos_t;
	150	enum task_throughput_qos {
	151	THROUGHPUT_QOS_TIER_UNSPECIFIED = 0x0,
	152	THROUGHPUT_QOS_TIER_0 = ((0xFE<<16) \| 1),
	153	THROUGHPUT_QOS_TIER_1 = ((0xFE<<16) \| 2),
	154	THROUGHPUT_QOS_TIER_2 = ((0xFE<<16) \| 3),
	155	THROUGHPUT_QOS_TIER_3 = ((0xFE<<16) \| 4),
	156	THROUGHPUT_QOS_TIER_4 = ((0xFE<<16) \| 5),
	157	THROUGHPUT_QOS_TIER_5 = ((0xFE<<16) \| 6),
	158	};
	159
	160	#define LATENCY_QOS_LAUNCH_DEFAULT_TIER LATENCY_QOS_TIER_3
	161	#define THROUGHPUT_QOS_LAUNCH_DEFAULT_TIER THROUGHPUT_QOS_TIER_3
	162
	163	typedef integer_t task_throughput_qos_t;
	164
	165	struct task_qos_policy {
	166	task_latency_qos_t task_latency_qos_tier;
	167	task_throughput_qos_t task_throughput_qos_tier;
	168	};
	169
	170	typedef struct task_qos_policy *task_qos_policy_t;
	171	#define TASK_QOS_POLICY_COUNT ((mach_msg_type_number_t) \
	172	(sizeof (struct task_qos_policy) / sizeof (integer_t)))
	173
	174	/* These should be removed - they belong in proc_info.h */
	175	#define PROC_FLAG_DARWINBG 0x8000 /* process in darwin background */
	176	#define PROC_FLAG_EXT_DARWINBG 0x10000 /* process in darwin background - external enforcement */
	177	#define PROC_FLAG_IOS_APPLEDAEMON 0x20000 /* process is apple ios daemon */
	178	#define PROC_FLAG_IOS_IMPPROMOTION 0x80000 /* process is apple ios daemon */
	179	#define PROC_FLAG_ADAPTIVE 0x100000 /* Process is adaptive */
	180	#define PROC_FLAG_ADAPTIVE_IMPORTANT 0x200000 /* Process is adaptive, and is currently important */
	181	#define PROC_FLAG_IMPORTANCE_DONOR 0x400000 /* Process is marked as an importance donor */
	182	#define PROC_FLAG_SUPPRESSED 0x800000 /* Process is suppressed */
	183	#define PROC_FLAG_APPLICATION 0x1000000 /* Process is an application */
	184	#define PROC_FLAG_IOS_APPLICATION PROC_FLAG_APPLICATION /* Process is an application */
	185
	186	#ifdef PRIVATE
	187
	188	struct task_requested_policy {
	189	/* Task and thread policy (inherited) */
	190	uint64_t int_darwinbg :1, /* marked as darwinbg via setpriority */
	191	ext_darwinbg :1,
	192	int_iotier :2, /* IO throttle tier */
	193	ext_iotier :2,
	194	int_iopassive :1, /* should IOs cause lower tiers to be throttled */
	195	ext_iopassive :1,
	196	bg_iotier :2, /* what IO throttle tier should apply to me when I'm darwinbg? (pushed to threads) */
	197	terminated :1, /* all throttles should be removed for quick exit or SIGTERM handling */
	198
	199	/* Thread only policy */
	200	th_pidbind_bg :1, /* thread only: task i'm bound to is marked 'watchbg' */
	201	th_workq_bg :1, /* thread only: currently running a background priority workqueue */
	202	thrp_qos :3, /* thread only: thread qos class */
	203	thrp_qos_relprio :4, /* thread only: thread qos relative priority (store as inverse, -10 -> 0xA) */
	204	thrp_qos_override :3, /* thread only: thread qos class override */
	205
	206	/* Task only policy */
	207	t_apptype :3, /* What apptype did launchd tell us this was (inherited) */
	208	t_boosted :1, /* Has a non-zero importance assertion count */
	209	t_int_gpu_deny :1, /* don't allow access to GPU */
	210	t_ext_gpu_deny :1,
	211	t_role :3, /* task's system role */
	212	t_tal_enabled :1, /* TAL mode is enabled */
	213	t_base_latency_qos :3, /* Timer latency QoS */
	214	t_over_latency_qos :3, /* Timer latency QoS override */
	215	t_base_through_qos :3, /* Computation throughput QoS */
	216	t_over_through_qos :3, /* Computation throughput QoS override */
	217	t_sfi_managed :1, /* SFI Managed task */
	218	t_qos_clamp :3, /* task qos clamp */
	219
	220	/* Task only: suppression policies (non-embedded only) */
	221	t_sup_active :1, /* Suppression is on */
	222	t_sup_lowpri_cpu :1, /* Wants low priority CPU (MAXPRI_THROTTLE) */
	223	t_sup_timer :3, /* Wanted timer throttling QoS tier */
	224	t_sup_disk :1, /* Wants disk throttling */
	225	t_sup_cpu_limit :1, /* Wants CPU limit (not hooked up yet)*/
	226	t_sup_suspend :1, /* Wants to be suspended */
	227	t_sup_throughput :3, /* Wants throughput QoS tier */
	228	t_sup_cpu :1, /* Wants suppressed CPU priority (MAXPRI_SUPPRESSED) */
	229	t_sup_bg_sockets :1, /* Wants background sockets */
	230
	231	reserved :2;
	232	};
	233
	234	struct task_effective_policy {
	235	/* Task and thread policy */
	236	uint64_t darwinbg :1, /* marked as 'background', and sockets are marked bg when created */
	237	lowpri_cpu :1, /* cpu priority == MAXPRI_THROTTLE */
	238	io_tier :2, /* effective throttle tier */
	239	io_passive :1, /* should IOs cause lower tiers to be throttled */
	240	all_sockets_bg :1, /* All existing sockets in process are marked as bg (thread: all created by thread) */
	241	new_sockets_bg :1, /* Newly created sockets should be marked as bg */
	242	bg_iotier :2, /* What throttle tier should I be in when darwinbg is set? */
	243	terminated :1, /* all throttles have been removed for quick exit or SIGTERM handling */
	244	qos_ui_is_urgent :1, /* bump UI-Interactive QoS up to the urgent preemption band */
	245
	246	/* Thread only policy */
	247	thep_qos :3, /* thread only: thread qos class */
	248	thep_qos_relprio :4, /* thread only: thread qos relative priority (store as inverse, -10 -> 0xA) */
	249
	250	/* Task only policy */
	251	t_gpu_deny :1, /* not allowed to access GPU */
	252	t_tal_engaged :1, /* TAL mode is in effect */
	253	t_suspended :1, /* task_suspend-ed due to suppression */
	254	t_watchers_bg :1, /* watchers are BG-ed */
	255	t_latency_qos :3, /* Timer latency QoS level */
	256	t_through_qos :3, /* Computation throughput QoS level */
	257	t_sup_active :1, /* suppression behaviors are in effect */
	258	t_role :3, /* task's system role */
	259	t_suppressed_cpu :1, /* cpu priority == MAXPRI_SUPPRESSED (trumped by lowpri_cpu) */
	260	t_sfi_managed :1, /* SFI Managed task */
	261	t_live_donor :1, /* task is a live importance boost donor */
	262	t_qos_clamp :3, /* task qos clamp (applies to qos-disabled threads too) */
	263	t_qos_ceiling :3, /* task qos ceiling (applies to only qos-participating threads) */
	264
	265	reserved :23;
	266	};
	267
	268	struct task_pended_policy {
	269	uint64_t t_updating_policy :1, /* Busy bit for task to prevent concurrent 'complete' operations */
	270
	271	/* Task and thread policy */
	272	update_sockets :1,
	273
	274	/* Task only policy */
	275	t_update_timers :1,
	276	t_update_watchers :1,
	277
	278	reserved :60;
	279	};
	280
	281	#endif
	282
	283	#ifdef MACH_KERNEL_PRIVATE
	284
	285	extern const struct task_requested_policy default_task_requested_policy;
	286	extern const struct task_effective_policy default_task_effective_policy;
	287	extern const struct task_pended_policy default_task_pended_policy;
	288
	289	extern kern_return_t
	290	qos_latency_policy_validate(task_latency_qos_t);
	291
	292	extern kern_return_t
	293	qos_throughput_policy_validate(task_throughput_qos_t);
	294
	295	extern uint32_t
	296	qos_extract(uint32_t);
	297
	298	extern uint32_t
	299	qos_latency_policy_package(uint32_t);
	300	extern uint32_t
	301	qos_throughput_policy_package(uint32_t);
	302
	303	#endif /* MACH_KERNEL_PRIVATE */
	304
	305	#ifdef PRIVATE
	306
	307	/*
	308	* Control structure for applying suppression behaviors to tasks
	309	*/
	310	struct task_suppression_policy {
	311	integer_t active;
	312	integer_t lowpri_cpu; /* priority MAXPRI_THROTTLE cpu */
	313	integer_t timer_throttle;
	314	integer_t disk_throttle;
	315	integer_t cpu_limit;
	316	integer_t suspend;
	317	integer_t throughput_qos;
	318	integer_t suppressed_cpu; /* priority MAXPRI_SUPPRESSED cpu */
	319	integer_t background_sockets;
	320	integer_t reserved[7];
	321	};
	322
	323	typedef struct task_suppression_policy *task_suppression_policy_t;
	324
	325	#define TASK_SUPPRESSION_POLICY_COUNT ((mach_msg_type_number_t) \
	326	(sizeof (struct task_suppression_policy) / sizeof (integer_t)))
	327
	328	struct task_policy_state {
	329	uint64_t requested;
	330	uint64_t effective;
	331	uint64_t pending;
	332	uint32_t imp_assertcnt;
	333	uint32_t imp_externcnt;
	334	uint64_t flags;
	335	uint64_t imp_transitions;
	336	uint64_t reserved[2];
	337	};
	338
	339	typedef struct task_policy_state *task_policy_state_t;
	340
	341	#define TASK_POLICY_STATE_COUNT ((mach_msg_type_number_t) \
	342	(sizeof (struct task_policy_state) / sizeof (integer_t)))
	343
	344
	345	/*
	346	* Definitions for munging and unmunging a policy struct
	347	* Used in task_policy_state and in tracepoints
	348	*
	349	* Note: this is tightly bound to the implementation of task policy
	350	* and the values exported through this API may change or change meaning at any time
	351	*
	352	* Do not rely on these values, especially apptype, to decide behaviors at runtime.
	353	*
	354	* All per-thread state must be in the first 32 bits of the bitfield.
	355	*/
	356
	357	#define TASK_APPTYPE_NONE 0
	358	#define TASK_APPTYPE_DAEMON_INTERACTIVE 1
	359	#define TASK_APPTYPE_DAEMON_STANDARD 2
	360	#define TASK_APPTYPE_DAEMON_ADAPTIVE 3
	361	#define TASK_APPTYPE_DAEMON_BACKGROUND 4
	362	#define TASK_APPTYPE_APP_DEFAULT 5
	363	#define TASK_APPTYPE_APP_TAL 6
	364
	365	/* task policy state flags */
	366	#define TASK_IMP_RECEIVER 0x00000001
	367	#define TASK_IMP_DONOR 0x00000002
	368	#define TASK_IMP_LIVE_DONOR 0x00000004
	369	#define TASK_DENAP_RECEIVER 0x00000008
	370
	371	/* requested_policy */
	372	#define POLICY_REQ_INT_DARWIN_BG 0x00000001
	373	#define POLICY_REQ_EXT_DARWIN_BG 0x00000002
	374	#define POLICY_REQ_INT_IO_TIER_MASK 0x0000000c /* 2 bits */
	375	#define POLICY_REQ_INT_IO_TIER_SHIFT 2
	376	#define POLICY_REQ_EXT_IO_TIER_MASK 0x00000030 /* 2 bits */
	377	#define POLICY_REQ_EXT_IO_TIER_SHIFT 4
	378	#define POLICY_REQ_INT_PASSIVE_IO 0x00000040
	379	#define POLICY_REQ_EXT_PASSIVE_IO 0x00000080
	380	#define POLICY_REQ_BG_IOTIER_MASK 0x00000300 /* 2 bits */
	381	#define POLICY_REQ_BG_IOTIER_SHIFT 8
	382
	383	/* thread requested policy */
	384	#define POLICY_REQ_PIDBIND_BG 0x00000400
	385	#define POLICY_REQ_WORKQ_BG 0x00000800
	386	#define POLICY_REQ_TH_QOS_MASK 0x07000000 /* 3 bits (overlaps with ROLE) */
	387	#define POLICY_REQ_TH_QOS_SHIFT 24
	388	#define POLICY_REQ_TH_QOS_OVER_MASK 0x70000000 /* 3 bits (overlaps with TAL and SFI) */
	389	#define POLICY_REQ_TH_QOS_OVER_SHIFT 28
	390
	391	/* task_requested_policy */
	392	#define POLICY_REQ_TERMINATED 0x00001000
	393	#define POLICY_REQ_BOOSTED 0x00002000
	394	#define POLICY_REQ_INT_GPU_DENY 0x00004000
	395	#define POLICY_REQ_EXT_GPU_DENY 0x00008000
	396	#define POLICY_REQ_APPTYPE_MASK 0x00070000 /* 3 bits */
	397	#define POLICY_REQ_APPTYPE_SHIFT 16
	398	#define POLICY_REQ_BASE_LATENCY_QOS_MASK 0x00700000 /* 3 bits */
	399	#define POLICY_REQ_BASE_LATENCY_QOS_SHIFT 20
	400	#define POLICY_REQ_ROLE_MASK 0x07000000 /* 3 bits */
	401	#define POLICY_REQ_ROLE_SHIFT 24
	402	#define POLICY_REQ_TAL_ENABLED 0x40000000
	403	#define POLICY_REQ_SFI_MANAGED 0x80000000
	404
	405	/* requested suppression behaviors (note: clipped off in 32-bit tracepoints) */
	406	#define POLICY_REQ_SUP_ACTIVE 0x0000000100000000
	407	#define POLICY_REQ_SUP_LOWPRI_CPU 0x0000000200000000
	408	#define POLICY_REQ_SUP_CPU 0x0000000400000000
	409	#define POLICY_REQ_SUP_DISK_THROTTLE 0x0000003000000000 /* 2 bits */
	410	#define POLICY_REQ_SUP_CPU_LIMIT 0x0000004000000000
	411	#define POLICY_REQ_SUP_SUSPEND 0x0000008000000000
	412	#define POLICY_REQ_OVER_LATENCY_QOS_MASK 0x0000070000000000 /* 3 bits */
	413	#define POLICY_REQ_OVER_LATENCY_QOS_SHIFT 40
	414	#define POLICY_REQ_BASE_THROUGH_QOS_MASK 0x0000700000000000 /* 3 bits */
	415	#define POLICY_REQ_BASE_THROUGH_QOS_SHIFT 44
	416	#define POLICY_REQ_OVER_THROUGH_QOS_MASK 0x0007000000000000 /* 3 bits */
	417	#define POLICY_REQ_OVER_THROUGH_QOS_SHIFT 48
	418	#define POLICY_REQ_SUP_TIMER_THROTTLE_MASK 0x0070000000000000 /* 3 bits */
	419	#define POLICY_REQ_SUP_TIMER_THROTTLE_SHIFT 52
	420	#define POLICY_REQ_SUP_THROUGHPUT_MASK 0x0700000000000000 /* 3 bits */
	421	#define POLICY_REQ_SUP_THROUGHPUT_SHIFT 56
	422	#define POLICY_REQ_SUP_BG_SOCKETS 0x0800008000000000
	423	#define POLICY_REQ_QOS_CLAMP_MASK 0x7000000000000000 /* 3 bits */
	424	#define POLICY_REQ_QOS_CLAMP_SHIFT 60
	425
	426	/* effective policy */
	427	#define POLICY_EFF_IO_TIER_MASK 0x00000003 /* 2 bits */
	428	#define POLICY_EFF_IO_TIER_SHIFT 0
	429	#define POLICY_EFF_IO_PASSIVE 0x00000008
	430	#define POLICY_EFF_DARWIN_BG 0x00000010
	431	#define POLICY_EFF_LOWPRI_CPU 0x00000020
	432	#define POLICY_EFF_ALL_SOCKETS_BG 0x00000040
	433	#define POLICY_EFF_NEW_SOCKETS_BG 0x00000080
	434	#define POLICY_EFF_BG_IOTIER_MASK 0x00000300 /* 2 bits */
	435	#define POLICY_EFF_BG_IOTIER_SHIFT 8
	436	#define POLICY_EFF_TERMINATED 0x00000400
	437	#define POLICY_EFF_QOS_UI_IS_URGENT 0x80000000
	438
	439	/* thread effective policy */
	440	#define POLICY_EFF_TH_QOS_MASK 0x00700000 /* 3 bits (overlaps with ROLE) */
	441	#define POLICY_EFF_TH_QOS_SHIFT 20
	442	#define POLICY_EFF_LATENCY_QOS_MASK 0x00070000 /* 3 bits */
	443	#define POLICY_EFF_LATENCY_QOS_SHIFT 16
	444	#define POLICY_EFF_THROUGH_QOS_MASK 0x07000000 /* 3 bits */
	445	#define POLICY_EFF_THROUGH_QOS_SHIFT 24
	446
	447	/* task effective policy */
	448	#define POLICY_EFF_GPU_DENY 0x00001000
	449	#define POLICY_EFF_TAL_ENGAGED 0x00002000
	450	#define POLICY_EFF_SUSPENDED 0x00004000
	451	#define POLICY_EFF_WATCHERS_BG 0x00008000
	452	#define POLICY_EFF_SUP_ACTIVE 0x00080000
	453	#define POLICY_EFF_ROLE_MASK 0x00700000 /* 3 bits */
	454	#define POLICY_EFF_ROLE_SHIFT 20
	455	#define POLICY_EFF_SUP_CPU 0x00800000
	456	#define POLICY_EFF_SFI_MANAGED 0x08000000
	457	#define POLICY_EFF_QOS_CEILING_MASK 0x70000000
	458	#define POLICY_EFF_QOS_CEILING_SHIFT 28
	459
	460	/* pending policy */
	461	#define POLICY_PEND_UPDATING 0x00000001
	462	#define POLICY_PEND_SOCKETS 0x00000002
	463	#define POLICY_PEND_TIMERS 0x00000004
	464	#define POLICY_PEND_WATCHERS 0x00000008
	465
	466	#endif /* PRIVATE */
	467
	468	#endif /* _MACH_TASK_POLICY_H_ */