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 PSR_AA32_MODE_FIQ FIQ_MODE
30 #define PSR_AA32_MODE_SVC SVC_MODE
31 #define PSR_AA32_MODE_ABT ABT_MODE
32 #define PSR_AA32_MODE_UND UND_MODE
33 #define PSR_AA32_T_BIT PSR_T_BIT
34 #define PSR_AA32_F_BIT PSR_F_BIT
35 #define PSR_AA32_I_BIT PSR_I_BIT
36 #define PSR_AA32_A_BIT PSR_A_BIT
37 #define PSR_AA32_E_BIT PSR_E_BIT
38 #define PSR_AA32_IT_MASK PSR_IT_MASK
39 #define PSR_AA32_GE_MASK 0x000f0000
40 #define PSR_AA32_DIT_BIT 0x00200000
41 #define PSR_AA32_PAN_BIT 0x00400000
42 #define PSR_AA32_SSBS_BIT 0x00800000
43 #define PSR_AA32_Q_BIT PSR_Q_BIT
44 #define PSR_AA32_V_BIT PSR_V_BIT
45 #define PSR_AA32_C_BIT PSR_C_BIT
46 #define PSR_AA32_Z_BIT PSR_Z_BIT
47 #define PSR_AA32_N_BIT PSR_N_BIT
49 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
51 static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num)
53 return vcpu_reg(vcpu, reg_num);
56 unsigned long *__vcpu_spsr(struct kvm_vcpu *vcpu);
58 static inline unsigned long vpcu_read_spsr(struct kvm_vcpu *vcpu)
60 return *__vcpu_spsr(vcpu);
63 static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
65 *__vcpu_spsr(vcpu) = v;
68 static inline unsigned long host_spsr_to_spsr32(unsigned long spsr)
73 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
76 return *vcpu_reg(vcpu, reg_num);
79 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
82 *vcpu_reg(vcpu, reg_num) = val;
85 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
86 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
87 void kvm_inject_undef32(struct kvm_vcpu *vcpu);
88 void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
89 void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
90 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
92 static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
94 kvm_inject_undef32(vcpu);
97 static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
99 kvm_inject_dabt32(vcpu, addr);
102 static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
104 kvm_inject_pabt32(vcpu, addr);
107 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
109 return kvm_condition_valid32(vcpu);
112 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
114 kvm_skip_instr32(vcpu, is_wide_instr);
117 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
119 vcpu->arch.hcr = HCR_GUEST_MASK;
122 static inline unsigned long *vcpu_hcr(const struct kvm_vcpu *vcpu)
124 return (unsigned long *)&vcpu->arch.hcr;
127 static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu)
129 vcpu->arch.hcr &= ~HCR_TWE;
132 static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu)
134 vcpu->arch.hcr |= HCR_TWE;
137 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
142 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
144 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
147 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
149 return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
152 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
154 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
157 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
159 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
160 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
163 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
165 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
166 return cpsr_mode > USR_MODE;
169 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
171 return vcpu->arch.fault.hsr;
174 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
176 u32 hsr = kvm_vcpu_get_hsr(vcpu);
179 return (hsr & HSR_COND) >> HSR_COND_SHIFT;
184 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
186 return vcpu->arch.fault.hxfar;
189 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
191 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
194 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
196 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
199 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
201 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
204 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
206 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
209 static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
214 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
216 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
219 static inline bool kvm_vcpu_abt_iss1tw(const struct kvm_vcpu *vcpu)
221 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
224 static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
226 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
229 /* Get Access Size from a data abort */
230 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
232 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
240 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
245 /* This one is not specific to Data Abort */
246 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
248 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
251 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
253 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
256 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
258 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
261 static inline bool kvm_vcpu_trap_is_exec_fault(const struct kvm_vcpu *vcpu)
263 return kvm_vcpu_trap_is_iabt(vcpu) && !kvm_vcpu_abt_iss1tw(vcpu);
266 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
268 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
271 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
273 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
276 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
278 switch (kvm_vcpu_trap_get_fault(vcpu)) {
295 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
297 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
300 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
302 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
305 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
307 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
310 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
312 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
315 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
319 if (kvm_vcpu_is_be(vcpu)) {
324 return be16_to_cpu(data & 0xffff);
326 return be32_to_cpu(data);
333 return le16_to_cpu(data & 0xffff);
335 return le32_to_cpu(data);
340 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
344 if (kvm_vcpu_is_be(vcpu)) {
349 return cpu_to_be16(data & 0xffff);
351 return cpu_to_be32(data);
358 return cpu_to_le16(data & 0xffff);
360 return cpu_to_le32(data);
365 #endif /* __ARM_KVM_EMULATE_H__ */