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 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
29 unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
31 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
34 return *vcpu_reg(vcpu, reg_num);
37 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
40 *vcpu_reg(vcpu, reg_num) = val;
43 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
44 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
45 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
46 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
47 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
48 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
50 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
52 return kvm_condition_valid32(vcpu);
55 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
57 kvm_skip_instr32(vcpu, is_wide_instr);
60 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
62 vcpu->arch.hcr = HCR_GUEST_MASK;
65 static inline unsigned long vcpu_get_hcr(const struct kvm_vcpu *vcpu)
67 return vcpu->arch.hcr;
70 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
75 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
80 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
82 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
85 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
87 return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
90 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
92 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
95 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
97 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
98 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
101 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
103 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
104 return cpsr_mode > USR_MODE;;
107 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
109 return vcpu->arch.fault.hsr;
112 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
114 u32 hsr = kvm_vcpu_get_hsr(vcpu);
117 return (hsr & HSR_COND) >> HSR_COND_SHIFT;
122 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
124 return vcpu->arch.fault.hxfar;
127 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
129 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
132 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
134 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
137 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
139 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
142 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
144 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
147 static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
152 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
154 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
157 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
159 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
162 static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
164 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
167 /* Get Access Size from a data abort */
168 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
170 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
178 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
183 /* This one is not specific to Data Abort */
184 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
186 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
189 static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
191 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
194 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
196 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
199 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
201 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
204 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
206 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
209 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
211 switch (kvm_vcpu_trap_get_fault_type(vcpu)) {
228 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
230 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
233 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
235 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
238 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
240 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
243 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
245 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
248 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
252 if (kvm_vcpu_is_be(vcpu)) {
257 return be16_to_cpu(data & 0xffff);
259 return be32_to_cpu(data);
266 return le16_to_cpu(data & 0xffff);
268 return le32_to_cpu(data);
273 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
277 if (kvm_vcpu_is_be(vcpu)) {
282 return cpu_to_be16(data & 0xffff);
284 return cpu_to_be32(data);
291 return cpu_to_le16(data & 0xffff);
293 return cpu_to_le32(data);
298 #endif /* __ARM_KVM_EMULATE_H__ */