1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* 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;
extern struct slb_shadow slb_shadow[];
/*
* 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 */
|
