You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
3.8 KiB
146 lines
3.8 KiB
/* |
|
* 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 { |
|
/* 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; |
|
} |
|
|
|
static inline bool write_to_read_only(struct kvm_vcpu *vcpu, |
|
const struct sys_reg_params *params) |
|
{ |
|
kvm_debug("sys_reg write to read-only register at: %lx\n", |
|
*vcpu_pc(vcpu)); |
|
print_sys_reg_instr(params); |
|
return false; |
|
} |
|
|
|
static inline bool read_from_write_only(struct kvm_vcpu *vcpu, |
|
const struct sys_reg_params *params) |
|
{ |
|
kvm_debug("sys_reg read to write-only register at: %lx\n", |
|
*vcpu_pc(vcpu)); |
|
print_sys_reg_instr(params); |
|
return false; |
|
} |
|
|
|
/* 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; |
|
} |
|
|
|
|
|
#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 |
|
|
|
#endif /* __ARM64_KVM_SYS_REGS_LOCAL_H__ */
|
|
|