[linux-2.6-block.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

/*
 * The below VPHN macros are outside the __KERNEL__ check since these are
 * used for compiling the vphn selftest in userspace
 */

/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers. */
#define VPHN_REGISTER_COUNT 6

/*
 * 6 64-bit registers unpacked into up to 24 be32 associativity values. To
 * form the complete property we have to add the length in the first cell.
 */
#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u16) + 1)

/*
 * The H_HOME_NODE_ASSOCIATIVITY hcall takes two values for flags:
 * 1 for retrieving associativity information for a guest cpu
 * 2 for retrieving associativity information for a host/hypervisor cpu
 */
#define VPHN_FLAG_VCPU	1
#define VPHN_FLAG_PCPU	2

#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 <linux/spinlock_types.h>
#include <asm/types.h>
#include <asm/mmu.h>
#include <asm/firmware.h>

/*
 * The lppaca is the "virtual processor area" registered with the hypervisor,
 * H_REGISTER_VPA etc.
 *
 * According to PAPR, the structure is 640 bytes long, must be L1 cache line
 * aligned, and must not cross a 4kB boundary. Its size field must be at
 * least 640 bytes (but may be more).
 *
 * Pre-v4.14 KVM hypervisors reject the VPA if its size field is smaller than
 * 1kB, so we dynamically allocate 1kB and advertise size as 1kB, but keep
 * this structure as the canonical 640 byte size.
 */
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];
} ____cacheline_aligned;

#define lppaca_of(cpu)	(*paca_ptrs[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)
{
	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
		return false;
	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))

/*
 * Dispatch trace log event enable mask:
 *   0x1: voluntary virtual processor waits
 *   0x2: time-slice preempts
 *   0x4: virtual partition memory page faults
 */
#define DTL_LOG_CEDE		0x1
#define DTL_LOG_PREEMPT		0x2
#define DTL_LOG_FAULT		0x4
#define DTL_LOG_ALL		(DTL_LOG_CEDE | DTL_LOG_PREEMPT | DTL_LOG_FAULT)

extern struct kmem_cache *dtl_cache;
extern rwlock_t dtl_access_lock;

/*
 * 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);

extern void register_dtl_buffer(int cpu);
extern void alloc_dtl_buffers(void);
extern long hcall_vphn(unsigned long cpu, u64 flags, __be32 *associativity);

#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
5a1ea477 NR	21
	22	/*
	23	* The below VPHN macros are outside the __KERNEL__ check since these are
	24	* used for compiling the vphn selftest in userspace
	25	*/
	26
	27	/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers. */
	28	#define VPHN_REGISTER_COUNT 6
	29
	30	/*
	31	* 6 64-bit registers unpacked into up to 24 be32 associativity values. To
	32	* form the complete property we have to add the length in the first cell.
	33	*/
	34	#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u16) + 1)
	35
	36	/*
	37	* The H_HOME_NODE_ASSOCIATIVITY hcall takes two values for flags:
	38	* 1 for retrieving associativity information for a guest cpu
	39	* 2 for retrieving associativity information for a host/hypervisor cpu
	40	*/
	41	#define VPHN_FLAG_VCPU 1
	42	#define VPHN_FLAG_PCPU 2
	43
88ced031	44	#ifdef __KERNEL__
1da177e4	45
59c19cb2 AB	46	/*
59c19cb2 AB	47	* These definitions relate to hypervisors that only exist when using
94491685 BH	48	* a server type processor
	49	*/
	50	#ifdef CONFIG_PPC_BOOK3S
	51
59c19cb2 AB	52	/*
	53	* This control block contains the data that is shared between the
	54	* hypervisor and the OS.
	55	*/
2f6093c8	56	#include <linux/cache.h>
f2f6dad6	57	#include <linux/threads.h>
06220d78	58	#include <linux/spinlock_types.h>
1da177e4	59	#include <asm/types.h>
2f6093c8	60	#include <asm/mmu.h>
a6201da3	61	#include <asm/firmware.h>
1da177e4	62
f2f6dad6	63	/*
499dcd41 NP	64	* The lppaca is the "virtual processor area" registered with the hypervisor,
	65	* H_REGISTER_VPA etc.
	66	*
	67	* According to PAPR, the structure is 640 bytes long, must be L1 cache line
	68	* aligned, and must not cross a 4kB boundary. Its size field must be at
	69	* least 640 bytes (but may be more).
	70	*
	71	* Pre-v4.14 KVM hypervisors reject the VPA if its size field is smaller than
	72	* 1kB, so we dynamically allocate 1kB and advertise size as 1kB, but keep
	73	* this structure as the canonical 640 byte size.
59c19cb2	74	*/
c6b3feaf	75	struct lppaca {
59c19cb2 AB	76	/* cacheline 1 contains read-only data */
59c19cb2 AB	77
c72cd555 AB	78	__be32 desc; /* Eye catcher 0xD397D781 */
c72cd555 AB	79	__be16 size; /* Size of this struct */
f13c13a0 AB	80	u8 reserved1[3];
f13c13a0 AB	81	u8 __old_status; /* Old status, including shared proc */
59c19cb2	82	u8 reserved3[14];
c72cd555 AB	83	volatile __be32 dyn_hw_node_id; /* Dynamic hardware node id */
c72cd555 AB	84	volatile __be32 dyn_hw_proc_id; /* Dynamic hardware proc id */
59c19cb2 AB	85	u8 reserved4[56];
	86	volatile u8 vphn_assoc_counts[8]; /* Virtual processor home node */
	87	/* associativity change counters */
	88	u8 reserved5[32];
	89
	90	/* cacheline 2 contains local read-write data */
	91
	92	u8 reserved6[48];
	93	u8 cede_latency_hint;
6e0b8bc9 ME	94	u8 ebb_regs_in_use;
6e0b8bc9 ME	95	u8 reserved7[6];
59c19cb2 AB	96	u8 dtl_enable_mask; /* Dispatch Trace Log mask */
	97	u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */
	98	u8 fpregs_in_use;
	99	u8 pmcregs_in_use;
	100	u8 reserved8[28];
c72cd555	101	__be64 wait_state_cycles; /* Wait cycles for this proc */
59c19cb2	102	u8 reserved9[28];
c72cd555	103	__be16 slb_count; /* # of SLBs to maintain */
59c19cb2 AB	104	u8 idle; /* Indicate OS is idle */
	105	u8 vmxregs_in_use;
	106
	107	/* cacheline 3 is shared with other processors */
	108
	109	/*
	110	* This is the yield_count. An "odd" value (low bit on) means that
	111	* the processor is yielded (either because of an OS yield or a
	112	* hypervisor preempt). An even value implies that the processor is
	113	* currently executing.
733187e2 AB	114	* NOTE: Even dedicated processor partitions can yield so this
733187e2 AB	115	* field cannot be used to determine if we are shared or dedicated.
59c19cb2	116	*/
c72cd555 AB	117	volatile __be32 yield_count;
	118	volatile __be32 dispersion_count; /* dispatch changed physical cpu */
	119	volatile __be64 cmo_faults; /* CMO page fault count */
	120	volatile __be64 cmo_fault_time; /* CMO page fault time */
59c19cb2 AB	121	u8 reserved10[104];
	122
	123	/* cacheline 4-5 */
	124
c72cd555	125	__be32 page_ins; /* CMO Hint - # page ins by OS */
59c19cb2	126	u8 reserved11[148];
499dcd41	127	volatile __be64 dtl_idx; /* Dispatch Trace Log head index */
59c19cb2	128	u8 reserved12[96];
499dcd41	129	} ____cacheline_aligned;
3356bb9f	130
d2e60075	131	#define lppaca_of(cpu) (*paca_ptrs[cpu]->lppaca_ptr)
8154c5d2	132
f13c13a0	133	/*
733187e2 AB	134	* We are using a non architected field to determine if a partition is
	135	* shared or dedicated. This currently works on both KVM and PHYP, but
	136	* we will have to transition to something better.
f13c13a0 AB	137	*/
	138	#define LPPACA_OLD_SHARED_PROC 2
	139
	140	static inline bool lppaca_shared_proc(struct lppaca *l)
	141	{
a6201da3 AK	142	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
a6201da3 AK	143	return false;
733187e2	144	return !!(l->__old_status & LPPACA_OLD_SHARED_PROC);
f13c13a0 AB	145	}
f13c13a0 AB	146
2f6093c8 MN	147	/*
	148	* SLB shadow buffer structure as defined in the PAPR. The save_area
	149	* contains adjacent ESID and VSID pairs for each shadowed SLB. The
	150	* ESID is stored in the lower 64bits, then the VSID.
	151	*/
	152	struct slb_shadow {
c72cd555 AB	153	__be32 persistent; /* Number of persistent SLBs */
	154	__be32 buffer_length; /* Total shadow buffer length */
	155	__be64 reserved;
2f6093c8	156	struct {
c72cd555 AB	157	__be64 esid;
c72cd555 AB	158	__be64 vsid;
59c19cb2	159	} save_area[SLB_NUM_BOLTED];
2f6093c8 MN	160	} ____cacheline_aligned;
2f6093c8 MN	161
cf9efce0 PM	162	/*
	163	* Layout of entries in the hypervisor's dispatch trace log buffer.
	164	*/
	165	struct dtl_entry {
	166	u8 dispatch_reason;
	167	u8 preempt_reason;
c72cd555 AB	168	__be16 processor_id;
	169	__be32 enqueue_to_dispatch_time;
	170	__be32 ready_to_enqueue_time;
	171	__be32 waiting_to_ready_time;
	172	__be64 timebase;
	173	__be64 fault_addr;
	174	__be64 srr0;
	175	__be64 srr1;
cf9efce0 PM	176	};
	177
	178	#define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */
	179	#define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
	180
515bbc8a NR	181	/*
	182	* Dispatch trace log event enable mask:
	183	* 0x1: voluntary virtual processor waits
	184	* 0x2: time-slice preempts
	185	* 0x4: virtual partition memory page faults
	186	*/
	187	#define DTL_LOG_CEDE 0x1
	188	#define DTL_LOG_PREEMPT 0x2
	189	#define DTL_LOG_FAULT 0x4
	190	#define DTL_LOG_ALL (DTL_LOG_CEDE \| DTL_LOG_PREEMPT \| DTL_LOG_FAULT)
	191
af442a1b	192	extern struct kmem_cache *dtl_cache;
06220d78	193	extern rwlock_t dtl_access_lock;
af442a1b	194
872e439a	195	/*
abf917cd	196	* When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls
872e439a PM	197	* reading from the dispatch trace log. If other code wants to consume
	198	* DTL entries, it can set this pointer to a function that will get
	199	* called once for each DTL entry that gets processed.
	200	*/
	201	extern void (dtl_consumer)(struct dtl_entry entry, u64 index);
	202
1c85a2a1 NR	203	extern void register_dtl_buffer(int cpu);
1c85a2a1 NR	204	extern void alloc_dtl_buffers(void);
5a1ea477	205	extern long hcall_vphn(unsigned long cpu, u64 flags, __be32 *associativity);
1c85a2a1	206
94491685	207	#endif /* CONFIG_PPC_BOOK3S */
88ced031	208	#endif /* __KERNEL__ */
8882a4da	209	#endif /* _ASM_POWERPC_LPPACA_H */