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11#ifndef __ARM64_KVM_SYS_REGS_LOCAL_H__
12#define __ARM64_KVM_SYS_REGS_LOCAL_H__
13
14struct sys_reg_params {
15 u8 Op0;
16 u8 Op1;
17 u8 CRn;
18 u8 CRm;
19 u8 Op2;
20 u64 regval;
21 bool is_write;
22 bool is_aarch32;
23 bool is_32bit;
24};
25
26struct sys_reg_desc {
27
28 const char *name;
29
30
31 u8 Op0;
32 u8 Op1;
33 u8 CRn;
34 u8 CRm;
35 u8 Op2;
36
37
38 bool (*access)(struct kvm_vcpu *,
39 struct sys_reg_params *,
40 const struct sys_reg_desc *);
41
42
43 void (*reset)(struct kvm_vcpu *, const struct sys_reg_desc *);
44
45
46 int reg;
47
48
49 u64 val;
50
51
52 int (*get_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
53 const struct kvm_one_reg *reg, void __user *uaddr);
54 int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
55 const struct kvm_one_reg *reg, void __user *uaddr);
56
57
58 unsigned int (*visibility)(const struct kvm_vcpu *vcpu,
59 const struct sys_reg_desc *rd);
60};
61
62#define REG_HIDDEN (1 << 0)
63#define REG_RAZ (1 << 1)
64
65static __printf(2, 3)
66inline void print_sys_reg_msg(const struct sys_reg_params *p,
67 char *fmt, ...)
68{
69 va_list va;
70
71 va_start(va, fmt);
72
73 kvm_pr_unimpl("%pV { Op0(%2u), Op1(%2u), CRn(%2u), CRm(%2u), Op2(%2u), func_%s },\n",
74 &(struct va_format){ fmt, &va },
75 p->Op0, p->Op1, p->CRn, p->CRm, p->Op2, p->is_write ? "write" : "read");
76 va_end(va);
77}
78
79static inline void print_sys_reg_instr(const struct sys_reg_params *p)
80{
81
82 print_sys_reg_msg(p, "%s", "");
83}
84
85static inline bool ignore_write(struct kvm_vcpu *vcpu,
86 const struct sys_reg_params *p)
87{
88 return true;
89}
90
91static inline bool read_zero(struct kvm_vcpu *vcpu,
92 struct sys_reg_params *p)
93{
94 p->regval = 0;
95 return true;
96}
97
98
99static inline void reset_unknown(struct kvm_vcpu *vcpu,
100 const struct sys_reg_desc *r)
101{
102 BUG_ON(!r->reg);
103 BUG_ON(r->reg >= NR_SYS_REGS);
104 __vcpu_sys_reg(vcpu, r->reg) = 0x1de7ec7edbadc0deULL;
105}
106
107static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
108{
109 BUG_ON(!r->reg);
110 BUG_ON(r->reg >= NR_SYS_REGS);
111 __vcpu_sys_reg(vcpu, r->reg) = r->val;
112}
113
114static inline bool sysreg_hidden(const struct kvm_vcpu *vcpu,
115 const struct sys_reg_desc *r)
116{
117 if (likely(!r->visibility))
118 return false;
119
120 return r->visibility(vcpu, r) & REG_HIDDEN;
121}
122
123static inline bool sysreg_visible_as_raz(const struct kvm_vcpu *vcpu,
124 const struct sys_reg_desc *r)
125{
126 if (likely(!r->visibility))
127 return false;
128
129 return r->visibility(vcpu, r) & REG_RAZ;
130}
131
132static inline int cmp_sys_reg(const struct sys_reg_desc *i1,
133 const struct sys_reg_desc *i2)
134{
135 BUG_ON(i1 == i2);
136 if (!i1)
137 return 1;
138 else if (!i2)
139 return -1;
140 if (i1->Op0 != i2->Op0)
141 return i1->Op0 - i2->Op0;
142 if (i1->Op1 != i2->Op1)
143 return i1->Op1 - i2->Op1;
144 if (i1->CRn != i2->CRn)
145 return i1->CRn - i2->CRn;
146 if (i1->CRm != i2->CRm)
147 return i1->CRm - i2->CRm;
148 return i1->Op2 - i2->Op2;
149}
150
151const struct sys_reg_desc *find_reg_by_id(u64 id,
152 struct sys_reg_params *params,
153 const struct sys_reg_desc table[],
154 unsigned int num);
155
156#define Op0(_x) .Op0 = _x
157#define Op1(_x) .Op1 = _x
158#define CRn(_x) .CRn = _x
159#define CRm(_x) .CRm = _x
160#define Op2(_x) .Op2 = _x
161
162#define SYS_DESC(reg) \
163 .name = #reg, \
164 Op0(sys_reg_Op0(reg)), Op1(sys_reg_Op1(reg)), \
165 CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)), \
166 Op2(sys_reg_Op2(reg))
167
168#endif
169