Commit d54a9658 authored by Valentin Schneider's avatar Valentin Schneider Committed by Ingo Molnar
Browse files

sched/topology: Split out SD_* flags declaration to its own file 



To associate the SD flags with some metadata, we need some more structure
in the way they are declared.

Rather than shove that in a free-standing macro list, move the declaration
in a separate file that can be re-imported with different SD_FLAG
definitions. This is inspired by what is done with the syscall
table (see uapi/asm/unistd.h and sys_call_table).

The value assigned to a given SD flag now depends on the order it appears
in sd_flags.h. No change in functionality.

Signed-off-by: default avatarValentin Schneider <valentin.schneider@arm.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Reviewed-by: default avatarDietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20200817113003.20802-4-valentin.schneider@arm.com
parent d23b3bf8

include/linux/sched/sd_flags.h

0 → 100644
+35 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * sched-domains (multiprocessor balancing) flag declarations.

 */



#ifndef SD_FLAG

# error "Incorrect import of SD flags definitions"

#endif



/* Balance when about to become idle */

SD_FLAG(SD_BALANCE_NEWIDLE)

/* Balance on exec */

SD_FLAG(SD_BALANCE_EXEC)

/* Balance on fork, clone */

SD_FLAG(SD_BALANCE_FORK)

/* Balance on wakeup */

SD_FLAG(SD_BALANCE_WAKE)

/* Wake task to waking CPU */

SD_FLAG(SD_WAKE_AFFINE)

/* Domain members have different CPU capacities */

SD_FLAG(SD_ASYM_CPUCAPACITY)

/* Domain members share CPU capacity */

SD_FLAG(SD_SHARE_CPUCAPACITY)

/* Domain members share CPU pkg resources */

SD_FLAG(SD_SHARE_PKG_RESOURCES)

/* Only a single load balancing instance */

SD_FLAG(SD_SERIALIZE)

/* Place busy groups earlier in the domain */

SD_FLAG(SD_ASYM_PACKING)

/* Prefer to place tasks in a sibling domain */

SD_FLAG(SD_PREFER_SIBLING)

/* sched_domains of this level overlap */

SD_FLAG(SD_OVERLAP)

/* cross-node balancing */

SD_FLAG(SD_NUMA)

include/linux/sched/topology.h

+13 −13
Original line number Diff line number Diff line
@@ -11,19 +11,19 @@ 
 */

#ifdef CONFIG_SMP



#define SD_BALANCE_NEWIDLE	0x0001	/* Balance when about to become idle */

#define SD_BALANCE_EXEC		0x0002	/* Balance on exec */

#define SD_BALANCE_FORK		0x0004	/* Balance on fork, clone */

#define SD_BALANCE_WAKE		0x0008  /* Balance on wakeup */

#define SD_WAKE_AFFINE		0x0010	/* Wake task to waking CPU */

#define SD_ASYM_CPUCAPACITY	0x0020  /* Domain members have different CPU capacities */

#define SD_SHARE_CPUCAPACITY	0x0040	/* Domain members share CPU capacity */

#define SD_SHARE_PKG_RESOURCES	0x0080	/* Domain members share CPU pkg resources */

#define SD_SERIALIZE		0x0100	/* Only a single load balancing instance */

#define SD_ASYM_PACKING		0x0200  /* Place busy groups earlier in the domain */

#define SD_PREFER_SIBLING	0x0400	/* Prefer to place tasks in a sibling domain */

#define SD_OVERLAP		0x0800	/* sched_domains of this level overlap */

#define SD_NUMA			0x1000	/* cross-node balancing */

/* Generate SD flag indexes */

#define SD_FLAG(name) __##name,

enum {

	#include <linux/sched/sd_flags.h>

	__SD_FLAG_CNT,

};

#undef SD_FLAG

/* Generate SD flag bits */

#define SD_FLAG(name) name = 1 << __##name,

enum {

	#include <linux/sched/sd_flags.h>

};

#undef SD_FLAG



#ifdef CONFIG_SCHED_SMT

static inline int cpu_smt_flags(void)

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