| /* |
| * 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, write to the Free Software |
| * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __ARM_KVM_COPROC_LOCAL_H__ |
| #define __ARM_KVM_COPROC_LOCAL_H__ |
| |
| struct coproc_params { |
| unsigned long CRn; |
| unsigned long CRm; |
| unsigned long Op1; |
| unsigned long Op2; |
| unsigned long Rt1; |
| unsigned long Rt2; |
| bool is_64bit; |
| bool is_write; |
| }; |
| |
| struct coproc_reg { |
| /* MRC/MCR/MRRC/MCRR instruction which accesses it. */ |
| unsigned long CRn; |
| unsigned long CRm; |
| unsigned long Op1; |
| unsigned long Op2; |
| |
| bool is_64; |
| |
| /* Trapped access from guest, if non-NULL. */ |
| bool (*access)(struct kvm_vcpu *, |
| const struct coproc_params *, |
| const struct coproc_reg *); |
| |
| /* Initialization for vcpu. */ |
| void (*reset)(struct kvm_vcpu *, const struct coproc_reg *); |
| |
| /* Index into vcpu->arch.cp15[], or 0 if we don't need to save it. */ |
| unsigned long reg; |
| |
| /* Value (usually reset value) */ |
| u64 val; |
| }; |
| |
| static inline void print_cp_instr(const struct coproc_params *p) |
| { |
| /* Look, we even formatted it for you to paste into the table! */ |
| if (p->is_64bit) { |
| kvm_pr_unimpl(" { CRm64(%2lu), Op1(%2lu), is64, func_%s },\n", |
| p->CRn, p->Op1, p->is_write ? "write" : "read"); |
| } else { |
| kvm_pr_unimpl(" { CRn(%2lu), CRm(%2lu), Op1(%2lu), Op2(%2lu), is32," |
| " func_%s },\n", |
| p->CRn, p->CRm, p->Op1, p->Op2, |
| p->is_write ? "write" : "read"); |
| } |
| } |
| |
| static inline bool ignore_write(struct kvm_vcpu *vcpu, |
| const struct coproc_params *p) |
| { |
| return true; |
| } |
| |
| static inline bool read_zero(struct kvm_vcpu *vcpu, |
| const struct coproc_params *p) |
| { |
| *vcpu_reg(vcpu, p->Rt1) = 0; |
| return true; |
| } |
| |
| static inline bool write_to_read_only(struct kvm_vcpu *vcpu, |
| const struct coproc_params *params) |
| { |
| kvm_debug("CP15 write to read-only register at: %08lx\n", |
| *vcpu_pc(vcpu)); |
| print_cp_instr(params); |
| return false; |
| } |
| |
| static inline bool read_from_write_only(struct kvm_vcpu *vcpu, |
| const struct coproc_params *params) |
| { |
| kvm_debug("CP15 read to write-only register at: %08lx\n", |
| *vcpu_pc(vcpu)); |
| print_cp_instr(params); |
| return false; |
| } |
| |
| /* Reset functions */ |
| static inline void reset_unknown(struct kvm_vcpu *vcpu, |
| const struct coproc_reg *r) |
| { |
| BUG_ON(!r->reg); |
| BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.cp15)); |
| vcpu->arch.cp15[r->reg] = 0xdecafbad; |
| } |
| |
| static inline void reset_val(struct kvm_vcpu *vcpu, const struct coproc_reg *r) |
| { |
| BUG_ON(!r->reg); |
| BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.cp15)); |
| vcpu->arch.cp15[r->reg] = r->val; |
| } |
| |
| static inline void reset_unknown64(struct kvm_vcpu *vcpu, |
| const struct coproc_reg *r) |
| { |
| BUG_ON(!r->reg); |
| BUG_ON(r->reg + 1 >= ARRAY_SIZE(vcpu->arch.cp15)); |
| |
| vcpu->arch.cp15[r->reg] = 0xdecafbad; |
| vcpu->arch.cp15[r->reg+1] = 0xd0c0ffee; |
| } |
| |
| static inline int cmp_reg(const struct coproc_reg *i1, |
| const struct coproc_reg *i2) |
| { |
| BUG_ON(i1 == i2); |
| if (!i1) |
| return 1; |
| else if (!i2) |
| return -1; |
| if (i1->CRn != i2->CRn) |
| return i1->CRn - i2->CRn; |
| if (i1->CRm != i2->CRm) |
| return i1->CRm - i2->CRm; |
| if (i1->Op1 != i2->Op1) |
| return i1->Op1 - i2->Op1; |
| if (i1->Op2 != i2->Op2) |
| return i1->Op2 - i2->Op2; |
| return i2->is_64 - i1->is_64; |
| } |
| |
| |
| #define CRn(_x) .CRn = _x |
| #define CRm(_x) .CRm = _x |
| #define CRm64(_x) .CRn = _x, .CRm = 0 |
| #define Op1(_x) .Op1 = _x |
| #define Op2(_x) .Op2 = _x |
| #define is64 .is_64 = true |
| #define is32 .is_64 = false |
| |
| bool access_vm_reg(struct kvm_vcpu *vcpu, |
| const struct coproc_params *p, |
| const struct coproc_reg *r); |
| |
| #endif /* __ARM_KVM_COPROC_LOCAL_H__ */ |