3 * Copyright (C) 2001 Mike Corrigan IBM Corporation
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.
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.
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
19 #ifndef _ASM_POWERPC_LPPACA_H
20 #define _ASM_POWERPC_LPPACA_H
24 * These definitions relate to hypervisors that only exist when using
25 * a server type processor
27 #ifdef CONFIG_PPC_BOOK3S
30 * This control block contains the data that is shared between the
31 * hypervisor and the OS.
33 #include <linux/cache.h>
34 #include <linux/threads.h>
35 #include <asm/types.h>
39 * We only have to have statically allocated lppaca structs on
40 * legacy iSeries, which supports at most 64 cpus.
45 * The Hypervisor barfs if the lppaca crosses a page boundary. A 1k
46 * alignment is sufficient to prevent this
49 /* cacheline 1 contains read-only data */
51 u32 desc
; /* Eye catcher 0xD397D781 */
52 u16 size
; /* Size of this struct */
55 u8 shared_proc
:1; /* Shared processor indicator */
56 u8 secondary_thread
:1; /* Secondary thread indicator */
58 volatile u32 dyn_hw_node_id
; /* Dynamic hardware node id */
59 volatile u32 dyn_hw_proc_id
; /* Dynamic hardware proc id */
61 volatile u8 vphn_assoc_counts
[8]; /* Virtual processor home node */
62 /* associativity change counters */
65 /* cacheline 2 contains local read-write data */
71 u8 dtl_enable_mask
; /* Dispatch Trace Log mask */
72 u8 donate_dedicated_cpu
; /* Donate dedicated CPU cycles */
76 u64 wait_state_cycles
; /* Wait cycles for this proc */
78 u16 slb_count
; /* # of SLBs to maintain */
79 u8 idle
; /* Indicate OS is idle */
82 /* cacheline 3 is shared with other processors */
85 * This is the yield_count. An "odd" value (low bit on) means that
86 * the processor is yielded (either because of an OS yield or a
87 * hypervisor preempt). An even value implies that the processor is
88 * currently executing.
89 * NOTE: This value will ALWAYS be zero for dedicated processors and
90 * will NEVER be zero for shared processors (ie, initialized to a 1).
92 volatile u32 yield_count
;
93 volatile u32 dispersion_count
; /* dispatch changed physical cpu */
94 volatile u64 cmo_faults
; /* CMO page fault count */
95 volatile u64 cmo_fault_time
; /* CMO page fault time */
100 u32 page_ins
; /* CMO Hint - # page ins by OS */
102 volatile u64 dtl_idx
; /* Dispatch Trace Log head index */
104 } __attribute__((__aligned__(0x400)));
106 extern struct lppaca lppaca
[];
108 #define lppaca_of(cpu) (*paca[cpu].lppaca_ptr)
111 * SLB shadow buffer structure as defined in the PAPR. The save_area
112 * contains adjacent ESID and VSID pairs for each shadowed SLB. The
113 * ESID is stored in the lower 64bits, then the VSID.
116 u32 persistent
; /* Number of persistent SLBs */
117 u32 buffer_length
; /* Total shadow buffer length */
122 } save_area
[SLB_NUM_BOLTED
];
123 } ____cacheline_aligned
;
125 extern struct slb_shadow slb_shadow
[];
128 * Layout of entries in the hypervisor's dispatch trace log buffer.
134 u32 enqueue_to_dispatch_time
;
135 u32 ready_to_enqueue_time
;
136 u32 waiting_to_ready_time
;
143 #define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */
144 #define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
146 extern struct kmem_cache
*dtl_cache
;
149 * When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls
150 * reading from the dispatch trace log. If other code wants to consume
151 * DTL entries, it can set this pointer to a function that will get
152 * called once for each DTL entry that gets processed.
154 extern void (*dtl_consumer
)(struct dtl_entry
*entry
, u64 index
);
156 #endif /* CONFIG_PPC_BOOK3S */
157 #endif /* __KERNEL__ */
158 #endif /* _ASM_POWERPC_LPPACA_H */