2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2, as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #ifndef __ARM_KVM_EMULATE_H__
20 #define __ARM_KVM_EMULATE_H__
22 #include <linux/kvm_host.h>
23 #include <asm/kvm_asm.h>
24 #include <asm/kvm_mmio.h>
25 #include <asm/kvm_arm.h>
27 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
28 unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
30 bool kvm_condition_valid(struct kvm_vcpu *vcpu);
31 void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr);
32 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
33 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
34 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
36 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
38 vcpu->arch.hcr = HCR_GUEST_MASK;
41 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
43 return vcpu->arch.hcr;
46 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
51 static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
56 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
58 return &vcpu->arch.regs.usr_regs.ARM_pc;
61 static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
63 return &vcpu->arch.regs.usr_regs.ARM_cpsr;
66 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
68 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
71 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
73 unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
74 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
77 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
79 unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
80 return cpsr_mode > USR_MODE;;
83 static inline u32 kvm_vcpu_get_hsr(struct kvm_vcpu *vcpu)
85 return vcpu->arch.fault.hsr;
88 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
90 return vcpu->arch.fault.hxfar;
93 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
95 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
98 static inline unsigned long kvm_vcpu_get_hyp_pc(struct kvm_vcpu *vcpu)
100 return vcpu->arch.fault.hyp_pc;
103 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
105 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
108 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
110 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
113 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
115 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
118 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
120 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
123 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
125 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_EA;
128 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
130 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
133 /* Get Access Size from a data abort */
134 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
136 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
144 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
149 /* This one is not specific to Data Abort */
150 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
152 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
155 static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
157 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
160 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
162 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
165 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
167 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
170 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
172 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
175 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
177 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
180 static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
182 return vcpu->arch.cp15[c0_MPIDR];
185 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
187 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
190 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
192 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
195 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
199 if (kvm_vcpu_is_be(vcpu)) {
204 return be16_to_cpu(data & 0xffff);
206 return be32_to_cpu(data);
213 return le16_to_cpu(data & 0xffff);
215 return le32_to_cpu(data);
220 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
224 if (kvm_vcpu_is_be(vcpu)) {
229 return cpu_to_be16(data & 0xffff);
231 return cpu_to_be32(data);
238 return cpu_to_le16(data & 0xffff);
240 return cpu_to_le32(data);
245 #endif /* __ARM_KVM_EMULATE_H__ */