[deliverable/linux.git] / arch / powerpc / include / asm / lppaca.h

/*
 * lppaca.h
 * Copyright (C) 2001  Mike Corrigan IBM Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */
#ifndef _ASM_POWERPC_LPPACA_H
#define _ASM_POWERPC_LPPACA_H
#ifdef __KERNEL__

/*
 * These definitions relate to hypervisors that only exist when using
 * a server type processor
 */
#ifdef CONFIG_PPC_BOOK3S

/*
 * This control block contains the data that is shared between the
 * hypervisor and the OS.
 */
#include <linux/cache.h>
#include <linux/threads.h>
#include <asm/types.h>
#include <asm/mmu.h>

/*
 * We only have to have statically allocated lppaca structs on
 * legacy iSeries, which supports at most 64 cpus.
 */
#define NR_LPPACAS	1

/*
 * The Hypervisor barfs if the lppaca crosses a page boundary.  A 1k
 * alignment is sufficient to prevent this
 */
struct lppaca {
	/* cacheline 1 contains read-only data */

	__be32	desc;			/* Eye catcher 0xD397D781 */
	__be16	size;			/* Size of this struct */
	u8	reserved1[3];
	u8	__old_status;		/* Old status, including shared proc */
	u8	reserved3[14];
	volatile __be32 dyn_hw_node_id;	/* Dynamic hardware node id */
	volatile __be32 dyn_hw_proc_id;	/* Dynamic hardware proc id */
	u8	reserved4[56];
	volatile u8 vphn_assoc_counts[8]; /* Virtual processor home node */
					  /* associativity change counters */
	u8	reserved5[32];

	/* cacheline 2 contains local read-write data */

	u8	reserved6[48];
	u8	cede_latency_hint;
	u8	ebb_regs_in_use;
	u8	reserved7[6];
	u8	dtl_enable_mask;	/* Dispatch Trace Log mask */
	u8	donate_dedicated_cpu;	/* Donate dedicated CPU cycles */
	u8	fpregs_in_use;
	u8	pmcregs_in_use;
	u8	reserved8[28];
	__be64	wait_state_cycles;	/* Wait cycles for this proc */
	u8	reserved9[28];
	__be16	slb_count;		/* # of SLBs to maintain */
	u8	idle;			/* Indicate OS is idle */
	u8	vmxregs_in_use;

	/* cacheline 3 is shared with other processors */

	/*
	 * This is the yield_count.  An "odd" value (low bit on) means that
	 * the processor is yielded (either because of an OS yield or a
	 * hypervisor preempt).  An even value implies that the processor is
	 * currently executing.
	 * NOTE: Even dedicated processor partitions can yield so this
	 * field cannot be used to determine if we are shared or dedicated.
	 */
	volatile __be32 yield_count;
	volatile __be32 dispersion_count; /* dispatch changed physical cpu */
	volatile __be64 cmo_faults;	/* CMO page fault count */
	volatile __be64 cmo_fault_time;	/* CMO page fault time */
	u8	reserved10[104];

	/* cacheline 4-5 */

	__be32	page_ins;		/* CMO Hint - # page ins by OS */
	u8	reserved11[148];
	volatile __be64 dtl_idx;		/* Dispatch Trace Log head index */
	u8	reserved12[96];
} __attribute__((__aligned__(0x400)));

extern struct lppaca lppaca[];

#define lppaca_of(cpu)	(*paca[cpu].lppaca_ptr)

/*
 * We are using a non architected field to determine if a partition is
 * shared or dedicated. This currently works on both KVM and PHYP, but
 * we will have to transition to something better.
 */
#define LPPACA_OLD_SHARED_PROC		2

static inline bool lppaca_shared_proc(struct lppaca *l)
{
	return !!(l->__old_status & LPPACA_OLD_SHARED_PROC);
}

/*
 * SLB shadow buffer structure as defined in the PAPR.  The save_area
 * contains adjacent ESID and VSID pairs for each shadowed SLB.  The
 * ESID is stored in the lower 64bits, then the VSID.
 */
struct slb_shadow {
	__be32	persistent;		/* Number of persistent SLBs */
	__be32	buffer_length;		/* Total shadow buffer length */
	__be64	reserved;
	struct	{
		__be64     esid;
		__be64	vsid;
	} save_area[SLB_NUM_BOLTED];
} ____cacheline_aligned;

/*
 * Layout of entries in the hypervisor's dispatch trace log buffer.
 */
struct dtl_entry {
	u8	dispatch_reason;
	u8	preempt_reason;
	__be16	processor_id;
	__be32	enqueue_to_dispatch_time;
	__be32	ready_to_enqueue_time;
	__be32	waiting_to_ready_time;
	__be64	timebase;
	__be64	fault_addr;
	__be64	srr0;
	__be64	srr1;
};

#define DISPATCH_LOG_BYTES	4096	/* bytes per cpu */
#define N_DISPATCH_LOG		(DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))

extern struct kmem_cache *dtl_cache;

/*
 * When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls
 * reading from the dispatch trace log.  If other code wants to consume
 * DTL entries, it can set this pointer to a function that will get
 * called once for each DTL entry that gets processed.
 */
extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index);

#endif /* CONFIG_PPC_BOOK3S */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_LPPACA_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* lppaca.h
	3	* Copyright (C) 2001 Mike Corrigan IBM Corporation
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
8882a4da DG	19	#ifndef _ASM_POWERPC_LPPACA_H
8882a4da DG	20	#define _ASM_POWERPC_LPPACA_H
88ced031	21	#ifdef __KERNEL__
1da177e4	22
59c19cb2 AB	23	/*
59c19cb2 AB	24	* These definitions relate to hypervisors that only exist when using
94491685 BH	25	* a server type processor
	26	*/
	27	#ifdef CONFIG_PPC_BOOK3S
	28
59c19cb2 AB	29	/*
	30	* This control block contains the data that is shared between the
	31	* hypervisor and the OS.
	32	*/
2f6093c8	33	#include <linux/cache.h>
f2f6dad6	34	#include <linux/threads.h>
1da177e4	35	#include <asm/types.h>
2f6093c8	36	#include <asm/mmu.h>
1da177e4	37
f2f6dad6 BH	38	/*
	39	* We only have to have statically allocated lppaca structs on
	40	* legacy iSeries, which supports at most 64 cpus.
	41	*/
f2f6dad6	42	#define NR_LPPACAS 1
f2f6dad6	43
59c19cb2 AB	44	/*
	45	* The Hypervisor barfs if the lppaca crosses a page boundary. A 1k
	46	* alignment is sufficient to prevent this
	47	*/
c6b3feaf	48	struct lppaca {
59c19cb2 AB	49	/* cacheline 1 contains read-only data */
59c19cb2 AB	50
c72cd555 AB	51	__be32 desc; /* Eye catcher 0xD397D781 */
c72cd555 AB	52	__be16 size; /* Size of this struct */
f13c13a0 AB	53	u8 reserved1[3];
f13c13a0 AB	54	u8 __old_status; /* Old status, including shared proc */
59c19cb2	55	u8 reserved3[14];
c72cd555 AB	56	volatile __be32 dyn_hw_node_id; /* Dynamic hardware node id */
c72cd555 AB	57	volatile __be32 dyn_hw_proc_id; /* Dynamic hardware proc id */
59c19cb2 AB	58	u8 reserved4[56];
	59	volatile u8 vphn_assoc_counts[8]; /* Virtual processor home node */
	60	/* associativity change counters */
	61	u8 reserved5[32];
	62
	63	/* cacheline 2 contains local read-write data */
	64
	65	u8 reserved6[48];
	66	u8 cede_latency_hint;
6e0b8bc9 ME	67	u8 ebb_regs_in_use;
6e0b8bc9 ME	68	u8 reserved7[6];
59c19cb2 AB	69	u8 dtl_enable_mask; /* Dispatch Trace Log mask */
	70	u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */
	71	u8 fpregs_in_use;
	72	u8 pmcregs_in_use;
	73	u8 reserved8[28];
c72cd555	74	__be64 wait_state_cycles; /* Wait cycles for this proc */
59c19cb2	75	u8 reserved9[28];
c72cd555	76	__be16 slb_count; /* # of SLBs to maintain */
59c19cb2 AB	77	u8 idle; /* Indicate OS is idle */
	78	u8 vmxregs_in_use;
	79
	80	/* cacheline 3 is shared with other processors */
	81
	82	/*
	83	* This is the yield_count. An "odd" value (low bit on) means that
	84	* the processor is yielded (either because of an OS yield or a
	85	* hypervisor preempt). An even value implies that the processor is
	86	* currently executing.
733187e2 AB	87	* NOTE: Even dedicated processor partitions can yield so this
733187e2 AB	88	* field cannot be used to determine if we are shared or dedicated.
59c19cb2	89	*/
c72cd555 AB	90	volatile __be32 yield_count;
	91	volatile __be32 dispersion_count; /* dispatch changed physical cpu */
	92	volatile __be64 cmo_faults; /* CMO page fault count */
	93	volatile __be64 cmo_fault_time; /* CMO page fault time */
59c19cb2 AB	94	u8 reserved10[104];
	95
	96	/* cacheline 4-5 */
	97
c72cd555	98	__be32 page_ins; /* CMO Hint - # page ins by OS */
59c19cb2	99	u8 reserved11[148];
c72cd555	100	volatile __be64 dtl_idx; /* Dispatch Trace Log head index */
59c19cb2	101	u8 reserved12[96];
c6b3feaf	102	} __attribute__((__aligned__(0x400)));
1da177e4	103
3356bb9f DG	104	extern struct lppaca lppaca[];
3356bb9f DG	105
93c22703	106	#define lppaca_of(cpu) (*paca[cpu].lppaca_ptr)
8154c5d2	107
f13c13a0	108	/*
733187e2 AB	109	* We are using a non architected field to determine if a partition is
	110	* shared or dedicated. This currently works on both KVM and PHYP, but
	111	* we will have to transition to something better.
f13c13a0 AB	112	*/
	113	#define LPPACA_OLD_SHARED_PROC 2
	114
	115	static inline bool lppaca_shared_proc(struct lppaca *l)
	116	{
733187e2	117	return !!(l->__old_status & LPPACA_OLD_SHARED_PROC);
f13c13a0 AB	118	}
f13c13a0 AB	119
2f6093c8 MN	120	/*
	121	* SLB shadow buffer structure as defined in the PAPR. The save_area
	122	* contains adjacent ESID and VSID pairs for each shadowed SLB. The
	123	* ESID is stored in the lower 64bits, then the VSID.
	124	*/
	125	struct slb_shadow {
c72cd555 AB	126	__be32 persistent; /* Number of persistent SLBs */
	127	__be32 buffer_length; /* Total shadow buffer length */
	128	__be64 reserved;
2f6093c8	129	struct {
c72cd555 AB	130	__be64 esid;
c72cd555 AB	131	__be64 vsid;
59c19cb2	132	} save_area[SLB_NUM_BOLTED];
2f6093c8 MN	133	} ____cacheline_aligned;
2f6093c8 MN	134
cf9efce0 PM	135	/*
	136	* Layout of entries in the hypervisor's dispatch trace log buffer.
	137	*/
	138	struct dtl_entry {
	139	u8 dispatch_reason;
	140	u8 preempt_reason;
c72cd555 AB	141	__be16 processor_id;
	142	__be32 enqueue_to_dispatch_time;
	143	__be32 ready_to_enqueue_time;
	144	__be32 waiting_to_ready_time;
	145	__be64 timebase;
	146	__be64 fault_addr;
	147	__be64 srr0;
	148	__be64 srr1;
cf9efce0 PM	149	};
	150
	151	#define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */
	152	#define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
	153
af442a1b NA	154	extern struct kmem_cache *dtl_cache;
af442a1b NA	155
872e439a	156	/*
abf917cd	157	* When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls
872e439a PM	158	* reading from the dispatch trace log. If other code wants to consume
	159	* DTL entries, it can set this pointer to a function that will get
	160	* called once for each DTL entry that gets processed.
	161	*/
	162	extern void (dtl_consumer)(struct dtl_entry entry, u64 index);
	163
94491685	164	#endif /* CONFIG_PPC_BOOK3S */
88ced031	165	#endif /* __KERNEL__ */
8882a4da	166	#endif /* _ASM_POWERPC_LPPACA_H */