| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University |
| 4 | * Authors: Christoffer Dall <c.dall@virtualopensystems.com> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #ifndef __ARM_KVM_COPROC_LOCAL_H__ |
| 8 | #define __ARM_KVM_COPROC_LOCAL_H__ |
| 9 | |
| 10 | struct coproc_params { |
| 11 | unsigned long CRn; |
| 12 | unsigned long CRm; |
| 13 | unsigned long Op1; |
| 14 | unsigned long Op2; |
| 15 | unsigned long Rt1; |
| 16 | unsigned long Rt2; |
| 17 | bool is_64bit; |
| 18 | bool is_write; |
| 19 | }; |
| 20 | |
| 21 | struct coproc_reg { |
| 22 | /* MRC/MCR/MRRC/MCRR instruction which accesses it. */ |
| 23 | unsigned long CRn; |
| 24 | unsigned long CRm; |
| 25 | unsigned long Op1; |
| 26 | unsigned long Op2; |
| 27 | |
| 28 | bool is_64bit; |
| 29 | |
| 30 | /* Trapped access from guest, if non-NULL. */ |
| 31 | bool (*access)(struct kvm_vcpu *, |
| 32 | const struct coproc_params *, |
| 33 | const struct coproc_reg *); |
| 34 | |
| 35 | /* Initialization for vcpu. */ |
| 36 | void (*reset)(struct kvm_vcpu *, const struct coproc_reg *); |
| 37 | |
| 38 | /* Index into vcpu_cp15(vcpu, ...), or 0 if we don't need to save it. */ |
| 39 | unsigned long reg; |
| 40 | |
| 41 | /* Value (usually reset value) */ |
| 42 | u64 val; |
| 43 | }; |
| 44 | |
| 45 | static inline void print_cp_instr(const struct coproc_params *p) |
| 46 | { |
| 47 | /* Look, we even formatted it for you to paste into the table! */ |
| 48 | if (p->is_64bit) { |
| 49 | kvm_pr_unimpl(" { CRm64(%2lu), Op1(%2lu), is64, func_%s },\n", |
| 50 | p->CRn, p->Op1, p->is_write ? "write" : "read"); |
| 51 | } else { |
| 52 | kvm_pr_unimpl(" { CRn(%2lu), CRm(%2lu), Op1(%2lu), Op2(%2lu), is32," |
| 53 | " func_%s },\n", |
| 54 | p->CRn, p->CRm, p->Op1, p->Op2, |
| 55 | p->is_write ? "write" : "read"); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | static inline bool ignore_write(struct kvm_vcpu *vcpu, |
| 60 | const struct coproc_params *p) |
| 61 | { |
| 62 | return true; |
| 63 | } |
| 64 | |
| 65 | static inline bool read_zero(struct kvm_vcpu *vcpu, |
| 66 | const struct coproc_params *p) |
| 67 | { |
| 68 | *vcpu_reg(vcpu, p->Rt1) = 0; |
| 69 | return true; |
| 70 | } |
| 71 | |
| 72 | /* Reset functions */ |
| 73 | static inline void reset_unknown(struct kvm_vcpu *vcpu, |
| 74 | const struct coproc_reg *r) |
| 75 | { |
| 76 | BUG_ON(!r->reg); |
| 77 | BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.ctxt.cp15)); |
| 78 | vcpu_cp15(vcpu, r->reg) = 0xdecafbad; |
| 79 | } |
| 80 | |
| 81 | static inline void reset_val(struct kvm_vcpu *vcpu, const struct coproc_reg *r) |
| 82 | { |
| 83 | BUG_ON(!r->reg); |
| 84 | BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.ctxt.cp15)); |
| 85 | vcpu_cp15(vcpu, r->reg) = r->val; |
| 86 | } |
| 87 | |
| 88 | static inline void reset_unknown64(struct kvm_vcpu *vcpu, |
| 89 | const struct coproc_reg *r) |
| 90 | { |
| 91 | BUG_ON(!r->reg); |
| 92 | BUG_ON(r->reg + 1 >= ARRAY_SIZE(vcpu->arch.ctxt.cp15)); |
| 93 | |
| 94 | vcpu_cp15(vcpu, r->reg) = 0xdecafbad; |
| 95 | vcpu_cp15(vcpu, r->reg+1) = 0xd0c0ffee; |
| 96 | } |
| 97 | |
| 98 | static inline int cmp_reg(const struct coproc_reg *i1, |
| 99 | const struct coproc_reg *i2) |
| 100 | { |
| 101 | BUG_ON(i1 == i2); |
| 102 | if (!i1) |
| 103 | return 1; |
| 104 | else if (!i2) |
| 105 | return -1; |
| 106 | if (i1->CRn != i2->CRn) |
| 107 | return i1->CRn - i2->CRn; |
| 108 | if (i1->CRm != i2->CRm) |
| 109 | return i1->CRm - i2->CRm; |
| 110 | if (i1->Op1 != i2->Op1) |
| 111 | return i1->Op1 - i2->Op1; |
| 112 | if (i1->Op2 != i2->Op2) |
| 113 | return i1->Op2 - i2->Op2; |
| 114 | return i2->is_64bit - i1->is_64bit; |
| 115 | } |
| 116 | |
| 117 | |
| 118 | #define CRn(_x) .CRn = _x |
| 119 | #define CRm(_x) .CRm = _x |
| 120 | #define CRm64(_x) .CRn = _x, .CRm = 0 |
| 121 | #define Op1(_x) .Op1 = _x |
| 122 | #define Op2(_x) .Op2 = _x |
| 123 | #define is64 .is_64bit = true |
| 124 | #define is32 .is_64bit = false |
| 125 | |
| 126 | bool access_vm_reg(struct kvm_vcpu *vcpu, |
| 127 | const struct coproc_params *p, |
| 128 | const struct coproc_reg *r); |
| 129 | |
| 130 | #endif /* __ARM_KVM_COPROC_LOCAL_H__ */ |