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_ABT ABT_MODE
30 #define PSR_AA32_MODE_UND UND_MODE
31 #define PSR_AA32_T_BIT PSR_T_BIT
32 #define PSR_AA32_I_BIT PSR_I_BIT
33 #define PSR_AA32_A_BIT PSR_A_BIT
34 #define PSR_AA32_E_BIT PSR_E_BIT
35 #define PSR_AA32_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 vpcu_read_spsr(struct kvm_vcpu *vcpu)
48 return *__vcpu_spsr(vcpu);
51 static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
53 *__vcpu_spsr(vcpu) = v;
56 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
59 return *vcpu_reg(vcpu, reg_num);
62 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
65 *vcpu_reg(vcpu, reg_num) = val;
68 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
69 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
70 void kvm_inject_undef32(struct kvm_vcpu *vcpu);
71 void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
72 void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
73 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
75 static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
77 kvm_inject_undef32(vcpu);
80 static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
82 kvm_inject_dabt32(vcpu, addr);
85 static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
87 kvm_inject_pabt32(vcpu, addr);
90 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
92 return kvm_condition_valid32(vcpu);
95 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
97 kvm_skip_instr32(vcpu, is_wide_instr);
100 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
102 vcpu->arch.hcr = HCR_GUEST_MASK;
105 static inline unsigned long *vcpu_hcr(const struct kvm_vcpu *vcpu)
107 return (unsigned long *)&vcpu->arch.hcr;
110 static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu)
112 vcpu->arch.hcr &= ~HCR_TWE;
115 static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu)
117 vcpu->arch.hcr |= HCR_TWE;
120 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
125 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
127 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
130 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
132 return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
135 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
137 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
140 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
142 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
143 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
146 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
148 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
149 return cpsr_mode > USR_MODE;
152 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
154 return vcpu->arch.fault.hsr;
157 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
159 u32 hsr = kvm_vcpu_get_hsr(vcpu);
162 return (hsr & HSR_COND) >> HSR_COND_SHIFT;
167 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
169 return vcpu->arch.fault.hxfar;
172 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
174 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
177 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
179 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
182 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
184 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
187 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
189 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
192 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
194 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
197 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
199 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
202 static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
204 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
207 /* Get Access Size from a data abort */
208 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
210 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
218 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
223 /* This one is not specific to Data Abort */
224 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
226 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
229 static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
231 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
234 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
236 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
239 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
241 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
244 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
246 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
249 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
251 switch (kvm_vcpu_trap_get_fault(vcpu)) {
268 static inline bool kvm_is_write_fault(struct kvm_vcpu *vcpu)
270 if (kvm_vcpu_trap_is_iabt(vcpu))
273 return kvm_vcpu_dabt_iswrite(vcpu);
276 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
278 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
281 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
283 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
286 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
288 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
291 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
293 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
296 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
300 if (kvm_vcpu_is_be(vcpu)) {
305 return be16_to_cpu(data & 0xffff);
307 return be32_to_cpu(data);
314 return le16_to_cpu(data & 0xffff);
316 return le32_to_cpu(data);
321 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
325 if (kvm_vcpu_is_be(vcpu)) {
330 return cpu_to_be16(data & 0xffff);
332 return cpu_to_be32(data);
339 return cpu_to_le16(data & 0xffff);
341 return cpu_to_le32(data);
346 #endif /* __ARM_KVM_EMULATE_H__ */