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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 |
20 | #define _ASM_POWERPC_LPPACA_H | |
88ced031 | 21 | #ifdef __KERNEL__ |
1da177e4 | 22 | |
59c19cb2 AB |
23 | /* |
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 */ |
50 | ||
c72cd555 AB |
51 | __be32 desc; /* Eye catcher 0xD397D781 */ |
52 | __be16 size; /* Size of this struct */ | |
f13c13a0 AB |
53 | u8 reserved1[3]; |
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 */ |
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; |
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 |
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[]; |
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 | } |
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; |
131 | __be64 vsid; | |
59c19cb2 | 132 | } save_area[SLB_NUM_BOLTED]; |
2f6093c8 MN |
133 | } ____cacheline_aligned; |
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; |
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 */ |