Commit | Line | Data |
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1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * lppaca.h | |
4 | * Copyright (C) 2001 Mike Corrigan IBM Corporation | |
1da177e4 | 5 | */ |
8882a4da DG |
6 | #ifndef _ASM_POWERPC_LPPACA_H |
7 | #define _ASM_POWERPC_LPPACA_H | |
88ced031 | 8 | #ifdef __KERNEL__ |
1da177e4 | 9 | |
59c19cb2 AB |
10 | /* |
11 | * These definitions relate to hypervisors that only exist when using | |
94491685 BH |
12 | * a server type processor |
13 | */ | |
14 | #ifdef CONFIG_PPC_BOOK3S | |
15 | ||
59c19cb2 AB |
16 | /* |
17 | * This control block contains the data that is shared between the | |
18 | * hypervisor and the OS. | |
19 | */ | |
2f6093c8 | 20 | #include <linux/cache.h> |
f2f6dad6 | 21 | #include <linux/threads.h> |
1da177e4 | 22 | #include <asm/types.h> |
2f6093c8 | 23 | #include <asm/mmu.h> |
a6201da3 | 24 | #include <asm/firmware.h> |
1da177e4 | 25 | |
f2f6dad6 | 26 | /* |
499dcd41 NP |
27 | * The lppaca is the "virtual processor area" registered with the hypervisor, |
28 | * H_REGISTER_VPA etc. | |
29 | * | |
30 | * According to PAPR, the structure is 640 bytes long, must be L1 cache line | |
31 | * aligned, and must not cross a 4kB boundary. Its size field must be at | |
32 | * least 640 bytes (but may be more). | |
33 | * | |
34 | * Pre-v4.14 KVM hypervisors reject the VPA if its size field is smaller than | |
35 | * 1kB, so we dynamically allocate 1kB and advertise size as 1kB, but keep | |
36 | * this structure as the canonical 640 byte size. | |
59c19cb2 | 37 | */ |
c6b3feaf | 38 | struct lppaca { |
59c19cb2 AB |
39 | /* cacheline 1 contains read-only data */ |
40 | ||
c72cd555 AB |
41 | __be32 desc; /* Eye catcher 0xD397D781 */ |
42 | __be16 size; /* Size of this struct */ | |
f13c13a0 AB |
43 | u8 reserved1[3]; |
44 | u8 __old_status; /* Old status, including shared proc */ | |
59c19cb2 | 45 | u8 reserved3[14]; |
c72cd555 AB |
46 | volatile __be32 dyn_hw_node_id; /* Dynamic hardware node id */ |
47 | volatile __be32 dyn_hw_proc_id; /* Dynamic hardware proc id */ | |
59c19cb2 AB |
48 | u8 reserved4[56]; |
49 | volatile u8 vphn_assoc_counts[8]; /* Virtual processor home node */ | |
50 | /* associativity change counters */ | |
51 | u8 reserved5[32]; | |
52 | ||
53 | /* cacheline 2 contains local read-write data */ | |
54 | ||
55 | u8 reserved6[48]; | |
56 | u8 cede_latency_hint; | |
6e0b8bc9 ME |
57 | u8 ebb_regs_in_use; |
58 | u8 reserved7[6]; | |
59c19cb2 AB |
59 | u8 dtl_enable_mask; /* Dispatch Trace Log mask */ |
60 | u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */ | |
61 | u8 fpregs_in_use; | |
62 | u8 pmcregs_in_use; | |
63 | u8 reserved8[28]; | |
c72cd555 | 64 | __be64 wait_state_cycles; /* Wait cycles for this proc */ |
59c19cb2 | 65 | u8 reserved9[28]; |
c72cd555 | 66 | __be16 slb_count; /* # of SLBs to maintain */ |
59c19cb2 AB |
67 | u8 idle; /* Indicate OS is idle */ |
68 | u8 vmxregs_in_use; | |
69 | ||
70 | /* cacheline 3 is shared with other processors */ | |
71 | ||
72 | /* | |
73 | * This is the yield_count. An "odd" value (low bit on) means that | |
74 | * the processor is yielded (either because of an OS yield or a | |
75 | * hypervisor preempt). An even value implies that the processor is | |
76 | * currently executing. | |
733187e2 AB |
77 | * NOTE: Even dedicated processor partitions can yield so this |
78 | * field cannot be used to determine if we are shared or dedicated. | |
59c19cb2 | 79 | */ |
c72cd555 AB |
80 | volatile __be32 yield_count; |
81 | volatile __be32 dispersion_count; /* dispatch changed physical cpu */ | |
82 | volatile __be64 cmo_faults; /* CMO page fault count */ | |
83 | volatile __be64 cmo_fault_time; /* CMO page fault time */ | |
59c19cb2 AB |
84 | u8 reserved10[104]; |
85 | ||
86 | /* cacheline 4-5 */ | |
87 | ||
c72cd555 | 88 | __be32 page_ins; /* CMO Hint - # page ins by OS */ |
59c19cb2 | 89 | u8 reserved11[148]; |
499dcd41 | 90 | volatile __be64 dtl_idx; /* Dispatch Trace Log head index */ |
59c19cb2 | 91 | u8 reserved12[96]; |
499dcd41 | 92 | } ____cacheline_aligned; |
3356bb9f | 93 | |
d2e60075 | 94 | #define lppaca_of(cpu) (*paca_ptrs[cpu]->lppaca_ptr) |
8154c5d2 | 95 | |
f13c13a0 | 96 | /* |
733187e2 AB |
97 | * We are using a non architected field to determine if a partition is |
98 | * shared or dedicated. This currently works on both KVM and PHYP, but | |
99 | * we will have to transition to something better. | |
f13c13a0 AB |
100 | */ |
101 | #define LPPACA_OLD_SHARED_PROC 2 | |
102 | ||
103 | static inline bool lppaca_shared_proc(struct lppaca *l) | |
104 | { | |
a6201da3 AK |
105 | if (!firmware_has_feature(FW_FEATURE_SPLPAR)) |
106 | return false; | |
733187e2 | 107 | return !!(l->__old_status & LPPACA_OLD_SHARED_PROC); |
f13c13a0 AB |
108 | } |
109 | ||
2f6093c8 MN |
110 | /* |
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. | |
114 | */ | |
115 | struct slb_shadow { | |
c72cd555 AB |
116 | __be32 persistent; /* Number of persistent SLBs */ |
117 | __be32 buffer_length; /* Total shadow buffer length */ | |
118 | __be64 reserved; | |
2f6093c8 | 119 | struct { |
c72cd555 AB |
120 | __be64 esid; |
121 | __be64 vsid; | |
59c19cb2 | 122 | } save_area[SLB_NUM_BOLTED]; |
2f6093c8 MN |
123 | } ____cacheline_aligned; |
124 | ||
cf9efce0 PM |
125 | /* |
126 | * Layout of entries in the hypervisor's dispatch trace log buffer. | |
127 | */ | |
128 | struct dtl_entry { | |
129 | u8 dispatch_reason; | |
130 | u8 preempt_reason; | |
c72cd555 AB |
131 | __be16 processor_id; |
132 | __be32 enqueue_to_dispatch_time; | |
133 | __be32 ready_to_enqueue_time; | |
134 | __be32 waiting_to_ready_time; | |
135 | __be64 timebase; | |
136 | __be64 fault_addr; | |
137 | __be64 srr0; | |
138 | __be64 srr1; | |
cf9efce0 PM |
139 | }; |
140 | ||
141 | #define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */ | |
142 | #define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry)) | |
143 | ||
af442a1b NA |
144 | extern struct kmem_cache *dtl_cache; |
145 | ||
872e439a | 146 | /* |
abf917cd | 147 | * When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls |
872e439a PM |
148 | * reading from the dispatch trace log. If other code wants to consume |
149 | * DTL entries, it can set this pointer to a function that will get | |
150 | * called once for each DTL entry that gets processed. | |
151 | */ | |
152 | extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index); | |
153 | ||
94491685 | 154 | #endif /* CONFIG_PPC_BOOK3S */ |
88ced031 | 155 | #endif /* __KERNEL__ */ |
8882a4da | 156 | #endif /* _ASM_POWERPC_LPPACA_H */ |