| /* |
| * Copyright (C) 2012,2013 - ARM Ltd |
| * Author: Marc Zyngier <marc.zyngier@arm.com> |
| * |
| * Derived from arch/arm/kvm/coproc.h |
| * Copyright (C) 2012 - Virtual Open Systems and Columbia University |
| * Authors: Christoffer Dall <c.dall@virtualopensystems.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License, version 2, as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #ifndef __ARM64_KVM_SYS_REGS_LOCAL_H__ |
| #define __ARM64_KVM_SYS_REGS_LOCAL_H__ |
| |
| struct sys_reg_params { |
| u8 Op0; |
| u8 Op1; |
| u8 CRn; |
| u8 CRm; |
| u8 Op2; |
| u64 regval; |
| bool is_write; |
| bool is_aarch32; |
| bool is_32bit; /* Only valid if is_aarch32 is true */ |
| }; |
| |
| struct sys_reg_desc { |
| /* Sysreg string for debug */ |
| const char *name; |
| |
| /* MRS/MSR instruction which accesses it. */ |
| u8 Op0; |
| u8 Op1; |
| u8 CRn; |
| u8 CRm; |
| u8 Op2; |
| |
| /* Trapped access from guest, if non-NULL. */ |
| bool (*access)(struct kvm_vcpu *, |
| struct sys_reg_params *, |
| const struct sys_reg_desc *); |
| |
| /* Initialization for vcpu. */ |
| void (*reset)(struct kvm_vcpu *, const struct sys_reg_desc *); |
| |
| /* Index into sys_reg[], or 0 if we don't need to save it. */ |
| int reg; |
| |
| /* Value (usually reset value) */ |
| u64 val; |
| |
| /* Custom get/set_user functions, fallback to generic if NULL */ |
| int (*get_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, |
| const struct kvm_one_reg *reg, void __user *uaddr); |
| int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, |
| const struct kvm_one_reg *reg, void __user *uaddr); |
| }; |
| |
| static inline void print_sys_reg_instr(const struct sys_reg_params *p) |
| { |
| /* Look, we even formatted it for you to paste into the table! */ |
| kvm_pr_unimpl(" { Op0(%2u), Op1(%2u), CRn(%2u), CRm(%2u), Op2(%2u), func_%s },\n", |
| p->Op0, p->Op1, p->CRn, p->CRm, p->Op2, p->is_write ? "write" : "read"); |
| } |
| |
| static inline bool ignore_write(struct kvm_vcpu *vcpu, |
| const struct sys_reg_params *p) |
| { |
| return true; |
| } |
| |
| static inline bool read_zero(struct kvm_vcpu *vcpu, |
| struct sys_reg_params *p) |
| { |
| p->regval = 0; |
| return true; |
| } |
| |
| /* Reset functions */ |
| static inline void reset_unknown(struct kvm_vcpu *vcpu, |
| const struct sys_reg_desc *r) |
| { |
| BUG_ON(!r->reg); |
| BUG_ON(r->reg >= NR_SYS_REGS); |
| __vcpu_sys_reg(vcpu, r->reg) = 0x1de7ec7edbadc0deULL; |
| } |
| |
| static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) |
| { |
| BUG_ON(!r->reg); |
| BUG_ON(r->reg >= NR_SYS_REGS); |
| __vcpu_sys_reg(vcpu, r->reg) = r->val; |
| } |
| |
| static inline int cmp_sys_reg(const struct sys_reg_desc *i1, |
| const struct sys_reg_desc *i2) |
| { |
| BUG_ON(i1 == i2); |
| if (!i1) |
| return 1; |
| else if (!i2) |
| return -1; |
| if (i1->Op0 != i2->Op0) |
| return i1->Op0 - i2->Op0; |
| if (i1->Op1 != i2->Op1) |
| return i1->Op1 - i2->Op1; |
| if (i1->CRn != i2->CRn) |
| return i1->CRn - i2->CRn; |
| if (i1->CRm != i2->CRm) |
| return i1->CRm - i2->CRm; |
| return i1->Op2 - i2->Op2; |
| } |
| |
| const struct sys_reg_desc *find_reg_by_id(u64 id, |
| struct sys_reg_params *params, |
| const struct sys_reg_desc table[], |
| unsigned int num); |
| |
| #define Op0(_x) .Op0 = _x |
| #define Op1(_x) .Op1 = _x |
| #define CRn(_x) .CRn = _x |
| #define CRm(_x) .CRm = _x |
| #define Op2(_x) .Op2 = _x |
| |
| #define SYS_DESC(reg) \ |
| .name = #reg, \ |
| Op0(sys_reg_Op0(reg)), Op1(sys_reg_Op1(reg)), \ |
| CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)), \ |
| Op2(sys_reg_Op2(reg)) |
| |
| #endif /* __ARM64_KVM_SYS_REGS_LOCAL_H__ */ |