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>
26 #include <asm/cputype.h>
28 /* arm64 compatibility macros */
29 #define COMPAT_PSR_MODE_ABT ABT_MODE
30 #define COMPAT_PSR_MODE_UND UND_MODE
31 #define COMPAT_PSR_T_BIT PSR_T_BIT
32 #define COMPAT_PSR_I_BIT PSR_I_BIT
33 #define COMPAT_PSR_A_BIT PSR_A_BIT
34 #define COMPAT_PSR_E_BIT PSR_E_BIT
35 #define COMPAT_PSR_IT_MASK PSR_IT_MASK
37 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
39 static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num)
41 return vcpu_reg(vcpu, reg_num);
44 unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
46 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
49 return *vcpu_reg(vcpu, reg_num);
52 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
55 *vcpu_reg(vcpu, reg_num) = val;
58 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
59 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
60 void kvm_inject_undef32(struct kvm_vcpu *vcpu);
61 void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
62 void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
63 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
65 static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
67 kvm_inject_undef32(vcpu);
70 static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
72 kvm_inject_dabt32(vcpu, addr);
75 static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
77 kvm_inject_pabt32(vcpu, addr);
80 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
82 return kvm_condition_valid32(vcpu);
85 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
87 kvm_skip_instr32(vcpu, is_wide_instr);
90 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
92 vcpu->arch.hcr = HCR_GUEST_MASK;
95 static inline unsigned long vcpu_get_hcr(const struct kvm_vcpu *vcpu)
97 return vcpu->arch.hcr;
100 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
102 vcpu->arch.hcr = hcr;
105 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
110 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
112 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
115 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
117 return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
120 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
122 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
125 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
127 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
128 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
131 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
133 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
134 return cpsr_mode > USR_MODE;
137 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
139 return vcpu->arch.fault.hsr;
142 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
144 u32 hsr = kvm_vcpu_get_hsr(vcpu);
147 return (hsr & HSR_COND) >> HSR_COND_SHIFT;
152 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
154 return vcpu->arch.fault.hxfar;
157 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
159 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
162 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
164 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
167 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
169 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
172 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
174 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
177 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
179 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
182 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
184 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
187 static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
189 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
192 /* Get Access Size from a data abort */
193 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
195 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
203 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
208 /* This one is not specific to Data Abort */
209 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
211 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
214 static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
216 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
219 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
221 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
224 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
226 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
229 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
231 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
234 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
236 switch (kvm_vcpu_trap_get_fault(vcpu)) {
253 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
255 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
258 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
260 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
263 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
265 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
268 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
270 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
273 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
277 if (kvm_vcpu_is_be(vcpu)) {
282 return be16_to_cpu(data & 0xffff);
284 return be32_to_cpu(data);
291 return le16_to_cpu(data & 0xffff);
293 return le32_to_cpu(data);
298 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
302 if (kvm_vcpu_is_be(vcpu)) {
307 return cpu_to_be16(data & 0xffff);
309 return cpu_to_be32(data);
316 return cpu_to_le16(data & 0xffff);
318 return cpu_to_le32(data);
323 #endif /* __ARM_KVM_EMULATE_H__ */