2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * Derived from arch/arm/kvm/coproc.h
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Authors: Christoffer Dall <c.dall@virtualopensystems.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, version 2, as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef __ARM64_KVM_SYS_REGS_LOCAL_H__
23 #define __ARM64_KVM_SYS_REGS_LOCAL_H__
25 struct sys_reg_params {
34 bool is_32bit; /* Only valid if is_aarch32 is true */
38 /* Sysreg string for debug */
41 /* MRS/MSR instruction which accesses it. */
48 /* Trapped access from guest, if non-NULL. */
49 bool (*access)(struct kvm_vcpu *,
50 struct sys_reg_params *,
51 const struct sys_reg_desc *);
53 /* Initialization for vcpu. */
54 void (*reset)(struct kvm_vcpu *, const struct sys_reg_desc *);
56 /* Index into sys_reg[], or 0 if we don't need to save it. */
59 /* Value (usually reset value) */
62 /* Custom get/set_user functions, fallback to generic if NULL */
63 int (*get_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
64 const struct kvm_one_reg *reg, void __user *uaddr);
65 int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
66 const struct kvm_one_reg *reg, void __user *uaddr);
69 static inline void print_sys_reg_instr(const struct sys_reg_params *p)
71 /* Look, we even formatted it for you to paste into the table! */
72 kvm_pr_unimpl(" { Op0(%2u), Op1(%2u), CRn(%2u), CRm(%2u), Op2(%2u), func_%s },\n",
73 p->Op0, p->Op1, p->CRn, p->CRm, p->Op2, p->is_write ? "write" : "read");
76 static inline bool ignore_write(struct kvm_vcpu *vcpu,
77 const struct sys_reg_params *p)
82 static inline bool read_zero(struct kvm_vcpu *vcpu,
83 struct sys_reg_params *p)
90 static inline void reset_unknown(struct kvm_vcpu *vcpu,
91 const struct sys_reg_desc *r)
94 BUG_ON(r->reg >= NR_SYS_REGS);
95 __vcpu_sys_reg(vcpu, r->reg) = 0x1de7ec7edbadc0deULL;
98 static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
101 BUG_ON(r->reg >= NR_SYS_REGS);
102 __vcpu_sys_reg(vcpu, r->reg) = r->val;
105 static inline int cmp_sys_reg(const struct sys_reg_desc *i1,
106 const struct sys_reg_desc *i2)
113 if (i1->Op0 != i2->Op0)
114 return i1->Op0 - i2->Op0;
115 if (i1->Op1 != i2->Op1)
116 return i1->Op1 - i2->Op1;
117 if (i1->CRn != i2->CRn)
118 return i1->CRn - i2->CRn;
119 if (i1->CRm != i2->CRm)
120 return i1->CRm - i2->CRm;
121 return i1->Op2 - i2->Op2;
124 const struct sys_reg_desc *find_reg_by_id(u64 id,
125 struct sys_reg_params *params,
126 const struct sys_reg_desc table[],
129 #define Op0(_x) .Op0 = _x
130 #define Op1(_x) .Op1 = _x
131 #define CRn(_x) .CRn = _x
132 #define CRm(_x) .CRm = _x
133 #define Op2(_x) .Op2 = _x
135 #define SYS_DESC(reg) \
137 Op0(sys_reg_Op0(reg)), Op1(sys_reg_Op1(reg)), \
138 CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)), \
139 Op2(sys_reg_Op2(reg))
141 #endif /* __ARM64_KVM_SYS_REGS_LOCAL_H__ */