2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * Derived from arch/arm/include/kvm_emulate.h
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef __ARM64_KVM_EMULATE_H__
23 #define __ARM64_KVM_EMULATE_H__
25 #include <linux/kvm_host.h>
26 #include <asm/kvm_asm.h>
27 #include <asm/kvm_arm.h>
28 #include <asm/kvm_mmio.h>
29 #include <asm/ptrace.h>
31 unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
32 unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
34 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
35 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
37 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
38 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
39 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
41 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
43 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
46 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
48 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
51 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
53 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
56 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
58 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
61 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
63 if (vcpu_mode_is_32bit(vcpu))
64 return kvm_condition_valid32(vcpu);
69 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
71 if (vcpu_mode_is_32bit(vcpu))
72 kvm_skip_instr32(vcpu, is_wide_instr);
77 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
79 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
82 static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
84 if (vcpu_mode_is_32bit(vcpu))
85 return vcpu_reg32(vcpu, reg_num);
87 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
90 /* Get vcpu SPSR for current mode */
91 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
93 if (vcpu_mode_is_32bit(vcpu))
94 return vcpu_spsr32(vcpu);
96 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
99 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
101 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
103 if (vcpu_mode_is_32bit(vcpu))
104 return mode > COMPAT_PSR_MODE_USR;
106 return mode != PSR_MODE_EL0t;
109 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
111 return vcpu->arch.fault.esr_el2;
114 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
116 return vcpu->arch.fault.far_el2;
119 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
121 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
124 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
126 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
129 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
131 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
134 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
136 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
139 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
141 return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
144 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
146 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
149 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
151 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
154 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
156 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
159 /* This one is not specific to Data Abort */
160 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
162 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
165 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
167 return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
170 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
172 return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
175 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
177 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
180 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
182 if (vcpu_mode_is_32bit(vcpu))
183 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
185 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
188 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
192 if (kvm_vcpu_is_be(vcpu)) {
197 return be16_to_cpu(data & 0xffff);
199 return be32_to_cpu(data & 0xffffffff);
201 return be64_to_cpu(data);
205 return data; /* Leave LE untouched */
208 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
212 if (kvm_vcpu_is_be(vcpu)) {
217 return cpu_to_be16(data & 0xffff);
219 return cpu_to_be32(data & 0xffffffff);
221 return cpu_to_be64(data);
225 return data; /* Leave LE untouched */
228 #endif /* __ARM64_KVM_EMULATE_H__ */