131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Authors: Christoffer Dall <c.dall@virtualopensystems.com>
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*/
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#ifndef __ARM_KVM_COPROC_LOCAL_H__
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#define __ARM_KVM_COPROC_LOCAL_H__
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struct coproc_params {
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unsigned long CRn;
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unsigned long CRm;
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unsigned long Op1;
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unsigned long Op2;
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unsigned long Rt1;
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unsigned long Rt2;
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bool is_64bit;
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bool is_write;
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};
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struct coproc_reg {
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/* MRC/MCR/MRRC/MCRR instruction which accesses it. */
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unsigned long CRn;
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unsigned long CRm;
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unsigned long Op1;
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unsigned long Op2;
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bool is_64bit;
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/* Trapped access from guest, if non-NULL. */
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bool (*access)(struct kvm_vcpu *,
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const struct coproc_params *,
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const struct coproc_reg *);
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/* Initialization for vcpu. */
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void (*reset)(struct kvm_vcpu *, const struct coproc_reg *);
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/* Index into vcpu_cp15(vcpu, ...), or 0 if we don't need to save it. */
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unsigned long reg;
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/* Value (usually reset value) */
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u64 val;
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};
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static inline void print_cp_instr(const struct coproc_params *p)
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{
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/* Look, we even formatted it for you to paste into the table! */
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if (p->is_64bit) {
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kvm_pr_unimpl(" { CRm64(%2lu), Op1(%2lu), is64, func_%s },\n",
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p->CRn, p->Op1, p->is_write ? "write" : "read");
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} else {
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kvm_pr_unimpl(" { CRn(%2lu), CRm(%2lu), Op1(%2lu), Op2(%2lu), is32,"
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" func_%s },\n",
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p->CRn, p->CRm, p->Op1, p->Op2,
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p->is_write ? "write" : "read");
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}
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}
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static inline bool ignore_write(struct kvm_vcpu *vcpu,
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const struct coproc_params *p)
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{
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return true;
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}
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static inline bool read_zero(struct kvm_vcpu *vcpu,
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const struct coproc_params *p)
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{
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*vcpu_reg(vcpu, p->Rt1) = 0;
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return true;
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}
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/* Reset functions */
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static inline void reset_unknown(struct kvm_vcpu *vcpu,
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const struct coproc_reg *r)
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{
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BUG_ON(!r->reg);
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BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.ctxt.cp15));
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vcpu_cp15(vcpu, r->reg) = 0xdecafbad;
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}
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static inline void reset_val(struct kvm_vcpu *vcpu, const struct coproc_reg *r)
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{
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BUG_ON(!r->reg);
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BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.ctxt.cp15));
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vcpu_cp15(vcpu, r->reg) = r->val;
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}
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static inline void reset_unknown64(struct kvm_vcpu *vcpu,
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const struct coproc_reg *r)
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{
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BUG_ON(!r->reg);
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BUG_ON(r->reg + 1 >= ARRAY_SIZE(vcpu->arch.ctxt.cp15));
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vcpu_cp15(vcpu, r->reg) = 0xdecafbad;
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vcpu_cp15(vcpu, r->reg+1) = 0xd0c0ffee;
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}
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static inline int cmp_reg(const struct coproc_reg *i1,
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const struct coproc_reg *i2)
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{
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BUG_ON(i1 == i2);
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if (!i1)
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return 1;
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else if (!i2)
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return -1;
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if (i1->CRn != i2->CRn)
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return i1->CRn - i2->CRn;
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if (i1->CRm != i2->CRm)
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return i1->CRm - i2->CRm;
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if (i1->Op1 != i2->Op1)
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return i1->Op1 - i2->Op1;
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if (i1->Op2 != i2->Op2)
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return i1->Op2 - i2->Op2;
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return i2->is_64bit - i1->is_64bit;
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}
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#define CRn(_x) .CRn = _x
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#define CRm(_x) .CRm = _x
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#define CRm64(_x) .CRn = _x, .CRm = 0
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#define Op1(_x) .Op1 = _x
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#define Op2(_x) .Op2 = _x
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#define is64 .is_64bit = true
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#define is32 .is_64bit = false
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bool access_vm_reg(struct kvm_vcpu *vcpu,
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const struct coproc_params *p,
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const struct coproc_reg *r);
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#endif /* __ARM_KVM_COPROC_LOCAL_H__ */
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