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173 lines
4.2 KiB
173 lines
4.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2012,2013 - ARM Ltd |
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* Author: Marc Zyngier <[email protected]> |
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* |
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* Derived from arch/arm/kvm/coproc.h |
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University |
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* Authors: Christoffer Dall <[email protected]> |
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*/ |
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#ifndef __ARM64_KVM_SYS_REGS_LOCAL_H__ |
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#define __ARM64_KVM_SYS_REGS_LOCAL_H__ |
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struct sys_reg_params { |
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u8 Op0; |
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u8 Op1; |
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u8 CRn; |
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u8 CRm; |
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u8 Op2; |
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u64 regval; |
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bool is_write; |
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}; |
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struct sys_reg_desc { |
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/* Sysreg string for debug */ |
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const char *name; |
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enum { |
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AA32_ZEROHIGH, |
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AA32_LO, |
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AA32_HI, |
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} aarch32_map; |
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/* MRS/MSR instruction which accesses it. */ |
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u8 Op0; |
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u8 Op1; |
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u8 CRn; |
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u8 CRm; |
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u8 Op2; |
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/* Trapped access from guest, if non-NULL. */ |
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bool (*access)(struct kvm_vcpu *, |
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struct sys_reg_params *, |
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const struct sys_reg_desc *); |
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/* Initialization for vcpu. */ |
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void (*reset)(struct kvm_vcpu *, const struct sys_reg_desc *); |
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/* Index into sys_reg[], or 0 if we don't need to save it. */ |
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int reg; |
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/* Value (usually reset value) */ |
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u64 val; |
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/* Custom get/set_user functions, fallback to generic if NULL */ |
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int (*get_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, |
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const struct kvm_one_reg *reg, void __user *uaddr); |
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int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, |
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const struct kvm_one_reg *reg, void __user *uaddr); |
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/* Return mask of REG_* runtime visibility overrides */ |
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unsigned int (*visibility)(const struct kvm_vcpu *vcpu, |
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const struct sys_reg_desc *rd); |
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}; |
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#define REG_HIDDEN (1 << 0) /* hidden from userspace and guest */ |
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#define REG_RAZ (1 << 1) /* RAZ from userspace and guest */ |
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static __printf(2, 3) |
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inline void print_sys_reg_msg(const struct sys_reg_params *p, |
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char *fmt, ...) |
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{ |
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va_list va; |
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va_start(va, fmt); |
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/* Look, we even formatted it for you to paste into the table! */ |
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kvm_pr_unimpl("%pV { Op0(%2u), Op1(%2u), CRn(%2u), CRm(%2u), Op2(%2u), func_%s },\n", |
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&(struct va_format){ fmt, &va }, |
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p->Op0, p->Op1, p->CRn, p->CRm, p->Op2, p->is_write ? "write" : "read"); |
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va_end(va); |
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} |
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static inline void print_sys_reg_instr(const struct sys_reg_params *p) |
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{ |
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/* GCC warns on an empty format string */ |
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print_sys_reg_msg(p, "%s", ""); |
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} |
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static inline bool ignore_write(struct kvm_vcpu *vcpu, |
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const struct sys_reg_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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struct sys_reg_params *p) |
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{ |
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p->regval = 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 sys_reg_desc *r) |
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{ |
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BUG_ON(!r->reg); |
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BUG_ON(r->reg >= NR_SYS_REGS); |
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__vcpu_sys_reg(vcpu, r->reg) = 0x1de7ec7edbadc0deULL; |
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} |
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static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) |
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{ |
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BUG_ON(!r->reg); |
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BUG_ON(r->reg >= NR_SYS_REGS); |
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__vcpu_sys_reg(vcpu, r->reg) = r->val; |
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} |
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static inline bool sysreg_hidden(const struct kvm_vcpu *vcpu, |
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const struct sys_reg_desc *r) |
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{ |
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if (likely(!r->visibility)) |
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return false; |
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return r->visibility(vcpu, r) & REG_HIDDEN; |
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} |
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static inline bool sysreg_visible_as_raz(const struct kvm_vcpu *vcpu, |
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const struct sys_reg_desc *r) |
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{ |
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if (likely(!r->visibility)) |
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return false; |
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return r->visibility(vcpu, r) & REG_RAZ; |
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} |
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static inline int cmp_sys_reg(const struct sys_reg_desc *i1, |
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const struct sys_reg_desc *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->Op0 != i2->Op0) |
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return i1->Op0 - i2->Op0; |
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if (i1->Op1 != i2->Op1) |
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return i1->Op1 - i2->Op1; |
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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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return i1->Op2 - i2->Op2; |
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} |
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const struct sys_reg_desc *find_reg_by_id(u64 id, |
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struct sys_reg_params *params, |
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const struct sys_reg_desc table[], |
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unsigned int num); |
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#define AA32(_x) .aarch32_map = AA32_##_x |
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#define Op0(_x) .Op0 = _x |
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#define Op1(_x) .Op1 = _x |
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#define CRn(_x) .CRn = _x |
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#define CRm(_x) .CRm = _x |
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#define Op2(_x) .Op2 = _x |
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#define SYS_DESC(reg) \ |
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.name = #reg, \ |
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Op0(sys_reg_Op0(reg)), Op1(sys_reg_Op1(reg)), \ |
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CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)), \ |
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Op2(sys_reg_Op2(reg)) |
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#endif /* __ARM64_KVM_SYS_REGS_LOCAL_H__ */
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