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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 | |
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 | /* |
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 */ |
77 | ||
c72cd555 AB |
78 | __be32 desc; /* Eye catcher 0xD397D781 */ |
79 | __be16 size; /* Size of this struct */ | |
f13c13a0 AB |
80 | u8 reserved1[3]; |
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 */ |
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; |
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 |
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)) |
143 | return false; | |
733187e2 | 144 | return !!(l->__old_status & LPPACA_OLD_SHARED_PROC); |
f13c13a0 AB |
145 | } |
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; |
158 | __be64 vsid; | |
59c19cb2 | 159 | } save_area[SLB_NUM_BOLTED]; |
2f6093c8 MN |
160 | } ____cacheline_aligned; |
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 | 203 | extern void register_dtl_buffer(int cpu); |
18a593c8 | 204 | extern void alloc_dtl_buffers(unsigned long *time_limit); |
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 */ |