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24#ifndef HW_I386_TOPOLOGY_H
25#define HW_I386_TOPOLOGY_H
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42#include "qemu/bitops.h"
43
44
45
46typedef uint32_t apic_id_t;
47
48typedef struct X86CPUTopoInfo {
49 unsigned pkg_id;
50 unsigned core_id;
51 unsigned smt_id;
52} X86CPUTopoInfo;
53
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55
56static unsigned apicid_bitwidth_for_count(unsigned count)
57{
58 g_assert(count >= 1);
59 count -= 1;
60 return count ? 32 - clz32(count) : 0;
61}
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63
64
65static inline unsigned apicid_smt_width(unsigned nr_cores, unsigned nr_threads)
66{
67 return apicid_bitwidth_for_count(nr_threads);
68}
69
70
71
72static inline unsigned apicid_core_width(unsigned nr_cores, unsigned nr_threads)
73{
74 return apicid_bitwidth_for_count(nr_cores);
75}
76
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78
79static inline unsigned apicid_core_offset(unsigned nr_cores,
80 unsigned nr_threads)
81{
82 return apicid_smt_width(nr_cores, nr_threads);
83}
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85
86
87static inline unsigned apicid_pkg_offset(unsigned nr_cores, unsigned nr_threads)
88{
89 return apicid_core_offset(nr_cores, nr_threads) +
90 apicid_core_width(nr_cores, nr_threads);
91}
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96
97static inline apic_id_t apicid_from_topo_ids(unsigned nr_cores,
98 unsigned nr_threads,
99 const X86CPUTopoInfo *topo)
100{
101 return (topo->pkg_id << apicid_pkg_offset(nr_cores, nr_threads)) |
102 (topo->core_id << apicid_core_offset(nr_cores, nr_threads)) |
103 topo->smt_id;
104}
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108
109static inline void x86_topo_ids_from_idx(unsigned nr_cores,
110 unsigned nr_threads,
111 unsigned cpu_index,
112 X86CPUTopoInfo *topo)
113{
114 unsigned core_index = cpu_index / nr_threads;
115 topo->smt_id = cpu_index % nr_threads;
116 topo->core_id = core_index % nr_cores;
117 topo->pkg_id = core_index / nr_cores;
118}
119
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122
123static inline void x86_topo_ids_from_apicid(apic_id_t apicid,
124 unsigned nr_cores,
125 unsigned nr_threads,
126 X86CPUTopoInfo *topo)
127{
128 topo->smt_id = apicid &
129 ~(0xFFFFFFFFUL << apicid_smt_width(nr_cores, nr_threads));
130 topo->core_id = (apicid >> apicid_core_offset(nr_cores, nr_threads)) &
131 ~(0xFFFFFFFFUL << apicid_core_width(nr_cores, nr_threads));
132 topo->pkg_id = apicid >> apicid_pkg_offset(nr_cores, nr_threads);
133}
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139static inline apic_id_t x86_apicid_from_cpu_idx(unsigned nr_cores,
140 unsigned nr_threads,
141 unsigned cpu_index)
142{
143 X86CPUTopoInfo topo;
144 x86_topo_ids_from_idx(nr_cores, nr_threads, cpu_index, &topo);
145 return apicid_from_topo_ids(nr_cores, nr_threads, &topo);
146}
147
148#endif
149