[linux-2.6-block.git] / arch / x86 / include / asm / intel_rdt.h

#ifndef _ASM_X86_INTEL_RDT_H
#define _ASM_X86_INTEL_RDT_H

#include <linux/jump_label.h>

#define IA32_L3_QOS_CFG		0xc81
#define IA32_L3_CBM_BASE	0xc90
#define IA32_L2_CBM_BASE	0xd10

#define L3_QOS_CDP_ENABLE	0x01ULL

/**
 * struct rdtgroup - store rdtgroup's data in resctrl file system.
 * @kn:				kernfs node
 * @rdtgroup_list:		linked list for all rdtgroups
 * @closid:			closid for this rdtgroup
 * @cpu_mask:			CPUs assigned to this rdtgroup
 * @flags:			status bits
 * @waitcount:			how many cpus expect to find this
 *				group when they acquire rdtgroup_mutex
 */
struct rdtgroup {
	struct kernfs_node	*kn;
	struct list_head	rdtgroup_list;
	int			closid;
	struct cpumask		cpu_mask;
	int			flags;
	atomic_t		waitcount;
};

/* rdtgroup.flags */
#define	RDT_DELETED		1

/* List of all resource groups */
extern struct list_head rdt_all_groups;

int __init rdtgroup_init(void);

/**
 * struct rftype - describe each file in the resctrl file system
 * @name: file name
 * @mode: access mode
 * @kf_ops: operations
 * @seq_show: show content of the file
 * @write: write to the file
 */
struct rftype {
	char			*name;
	umode_t			mode;
	struct kernfs_ops	*kf_ops;

	int (*seq_show)(struct kernfs_open_file *of,
			struct seq_file *sf, void *v);
	/*
	 * write() is the generic write callback which maps directly to
	 * kernfs write operation and overrides all other operations.
	 * Maximum write size is determined by ->max_write_len.
	 */
	ssize_t (*write)(struct kernfs_open_file *of,
			 char *buf, size_t nbytes, loff_t off);
};

/**
 * struct rdt_resource - attributes of an RDT resource
 * @enabled:			Is this feature enabled on this machine
 * @capable:			Is this feature available on this machine
 * @name:			Name to use in "schemata" file
 * @num_closid:			Number of CLOSIDs available
 * @max_cbm:			Largest Cache Bit Mask allowed
 * @min_cbm_bits:		Minimum number of consecutive bits to be set
 *				in a cache bit mask
 * @domains:			All domains for this resource
 * @num_domains:		Number of domains active
 * @msr_base:			Base MSR address for CBMs
 * @tmp_cbms:			Scratch space when updating schemata
 * @cache_level:		Which cache level defines scope of this domain
 * @cbm_idx_multi:		Multiplier of CBM index
 * @cbm_idx_offset:		Offset of CBM index. CBM index is computed by:
 *				closid * cbm_idx_multi + cbm_idx_offset
 */
struct rdt_resource {
	bool			enabled;
	bool			capable;
	char			*name;
	int			num_closid;
	int			cbm_len;
	int			min_cbm_bits;
	u32			max_cbm;
	struct list_head	domains;
	int			num_domains;
	int			msr_base;
	u32			*tmp_cbms;
	int			cache_level;
	int			cbm_idx_multi;
	int			cbm_idx_offset;
};

/**
 * struct rdt_domain - group of cpus sharing an RDT resource
 * @list:	all instances of this resource
 * @id:		unique id for this instance
 * @cpu_mask:	which cpus share this resource
 * @cbm:	array of cache bit masks (indexed by CLOSID)
 */
struct rdt_domain {
	struct list_head	list;
	int			id;
	struct cpumask		cpu_mask;
	u32			*cbm;
};

/**
 * struct msr_param - set a range of MSRs from a domain
 * @res:       The resource to use
 * @low:       Beginning index from base MSR
 * @high:      End index
 */
struct msr_param {
	struct rdt_resource	*res;
	int			low;
	int			high;
};

extern struct mutex rdtgroup_mutex;

extern struct rdt_resource rdt_resources_all[];
extern struct rdtgroup rdtgroup_default;
DECLARE_STATIC_KEY_FALSE(rdt_enable_key);

int __init rdtgroup_init(void);

enum {
	RDT_RESOURCE_L3,
	RDT_RESOURCE_L3DATA,
	RDT_RESOURCE_L3CODE,
	RDT_RESOURCE_L2,

	/* Must be the last */
	RDT_NUM_RESOURCES,
};

#define for_each_capable_rdt_resource(r)				      \
	for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
	     r++) 							      \
		if (r->capable)

#define for_each_enabled_rdt_resource(r)				      \
	for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
	     r++)							      \
		if (r->enabled)

/* CPUID.(EAX=10H, ECX=ResID=1).EAX */
union cpuid_0x10_1_eax {
	struct {
		unsigned int cbm_len:5;
	} split;
	unsigned int full;
};

/* CPUID.(EAX=10H, ECX=ResID=1).EDX */
union cpuid_0x10_1_edx {
	struct {
		unsigned int cos_max:16;
	} split;
	unsigned int full;
};

DECLARE_PER_CPU_READ_MOSTLY(int, cpu_closid);

void rdt_cbm_update(void *arg);
struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
void rdtgroup_kn_unlock(struct kernfs_node *kn);
#endif /* _ASM_X86_INTEL_RDT_H */
Commit	Line	Data
113c6097 FY	1	#ifndef _ASM_X86_INTEL_RDT_H
	2	#define _ASM_X86_INTEL_RDT_H
	3
5ff193fb FY	4	#include <linux/jump_label.h>
	5
	6	#define IA32_L3_QOS_CFG 0xc81
113c6097	7	#define IA32_L3_CBM_BASE 0xc90
c1c7c3f9	8	#define IA32_L2_CBM_BASE 0xd10
113c6097	9
5ff193fb FY	10	#define L3_QOS_CDP_ENABLE 0x01ULL
	11
	12	/**
	13	* struct rdtgroup - store rdtgroup's data in resctrl file system.
	14	* @kn: kernfs node
	15	* @rdtgroup_list: linked list for all rdtgroups
	16	* @closid: closid for this rdtgroup
12e0110c	17	* @cpu_mask: CPUs assigned to this rdtgroup
60cf5e10 FY	18	* @flags: status bits
60cf5e10 FY	19	* @waitcount: how many cpus expect to find this
12e0110c	20	* group when they acquire rdtgroup_mutex
5ff193fb FY	21	*/
	22	struct rdtgroup {
	23	struct kernfs_node *kn;
	24	struct list_head rdtgroup_list;
	25	int closid;
12e0110c	26	struct cpumask cpu_mask;
60cf5e10 FY	27	int flags;
60cf5e10 FY	28	atomic_t waitcount;
5ff193fb FY	29	};
5ff193fb FY	30
60cf5e10 FY	31	/* rdtgroup.flags */
	32	#define RDT_DELETED 1
	33
5ff193fb FY	34	/* List of all resource groups */
	35	extern struct list_head rdt_all_groups;
	36
	37	int __init rdtgroup_init(void);
	38
4e978d06 FY	39	/**
	40	* struct rftype - describe each file in the resctrl file system
	41	* @name: file name
	42	* @mode: access mode
	43	* @kf_ops: operations
	44	* @seq_show: show content of the file
	45	* @write: write to the file
	46	*/
	47	struct rftype {
	48	char *name;
	49	umode_t mode;
	50	struct kernfs_ops *kf_ops;
	51
	52	int (seq_show)(struct kernfs_open_file of,
	53	struct seq_file sf, void v);
	54	/*
	55	* write() is the generic write callback which maps directly to
	56	* kernfs write operation and overrides all other operations.
	57	* Maximum write size is determined by ->max_write_len.
	58	*/
	59	ssize_t (write)(struct kernfs_open_file of,
	60	char *buf, size_t nbytes, loff_t off);
	61	};
	62
c1c7c3f9 FY	63	/**
	64	* struct rdt_resource - attributes of an RDT resource
	65	* @enabled: Is this feature enabled on this machine
	66	* @capable: Is this feature available on this machine
	67	* @name: Name to use in "schemata" file
	68	* @num_closid: Number of CLOSIDs available
	69	* @max_cbm: Largest Cache Bit Mask allowed
	70	* @min_cbm_bits: Minimum number of consecutive bits to be set
	71	* in a cache bit mask
	72	* @domains: All domains for this resource
	73	* @num_domains: Number of domains active
	74	* @msr_base: Base MSR address for CBMs
	75	* @tmp_cbms: Scratch space when updating schemata
	76	* @cache_level: Which cache level defines scope of this domain
	77	* @cbm_idx_multi: Multiplier of CBM index
	78	* @cbm_idx_offset: Offset of CBM index. CBM index is computed by:
	79	* closid * cbm_idx_multi + cbm_idx_offset
	80	*/
	81	struct rdt_resource {
	82	bool enabled;
	83	bool capable;
	84	char *name;
	85	int num_closid;
	86	int cbm_len;
	87	int min_cbm_bits;
	88	u32 max_cbm;
	89	struct list_head domains;
	90	int num_domains;
	91	int msr_base;
	92	u32 *tmp_cbms;
	93	int cache_level;
	94	int cbm_idx_multi;
	95	int cbm_idx_offset;
	96	};
	97
2264d9c7 TL	98	/**
	99	* struct rdt_domain - group of cpus sharing an RDT resource
	100	* @list: all instances of this resource
	101	* @id: unique id for this instance
	102	* @cpu_mask: which cpus share this resource
	103	* @cbm: array of cache bit masks (indexed by CLOSID)
	104	*/
	105	struct rdt_domain {
	106	struct list_head list;
	107	int id;
	108	struct cpumask cpu_mask;
	109	u32 *cbm;
	110	};
	111
	112	/**
	113	* struct msr_param - set a range of MSRs from a domain
	114	* @res: The resource to use
	115	* @low: Beginning index from base MSR
	116	* @high: End index
	117	*/
	118	struct msr_param {
	119	struct rdt_resource *res;
	120	int low;
	121	int high;
	122	};
	123
	124	extern struct mutex rdtgroup_mutex;
	125
c1c7c3f9	126	extern struct rdt_resource rdt_resources_all[];
5ff193fb FY	127	extern struct rdtgroup rdtgroup_default;
	128	DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
	129
	130	int __init rdtgroup_init(void);
c1c7c3f9 FY	131
	132	enum {
	133	RDT_RESOURCE_L3,
	134	RDT_RESOURCE_L3DATA,
	135	RDT_RESOURCE_L3CODE,
	136	RDT_RESOURCE_L2,
	137
	138	/* Must be the last */
	139	RDT_NUM_RESOURCES,
	140	};
	141
	142	#define for_each_capable_rdt_resource(r) \
	143	for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
	144	r++) \
	145	if (r->capable)
	146
2264d9c7 TL	147	#define for_each_enabled_rdt_resource(r) \
	148	for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\
	149	r++) \
	150	if (r->enabled)
	151
c1c7c3f9 FY	152	/* CPUID.(EAX=10H, ECX=ResID=1).EAX */
	153	union cpuid_0x10_1_eax {
	154	struct {
	155	unsigned int cbm_len:5;
	156	} split;
	157	unsigned int full;
	158	};
	159
	160	/* CPUID.(EAX=10H, ECX=ResID=1).EDX */
	161	union cpuid_0x10_1_edx {
	162	struct {
	163	unsigned int cos_max:16;
	164	} split;
	165	unsigned int full;
	166	};
2264d9c7	167
12e0110c TL	168	DECLARE_PER_CPU_READ_MOSTLY(int, cpu_closid);
12e0110c TL	169
2264d9c7	170	void rdt_cbm_update(void *arg);
60cf5e10 FY	171	struct rdtgroup rdtgroup_kn_lock_live(struct kernfs_node kn);
60cf5e10 FY	172	void rdtgroup_kn_unlock(struct kernfs_node *kn);
113c6097	173	#endif /* _ASM_X86_INTEL_RDT_H */