tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
4 *
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.
8 *
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.
13 *
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.
17 */
18
19#ifndef __ARM_KVM_EMULATE_H__
20#define __ARM_KVM_EMULATE_H__
21
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>
27
28unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
29unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
30
31static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
32 u8 reg_num)
33{
34 return *vcpu_reg(vcpu, reg_num);
35}
36
37static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
38 unsigned long val)
39{
40 *vcpu_reg(vcpu, reg_num) = val;
41}
42
43bool kvm_condition_valid(struct kvm_vcpu *vcpu);
44void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr);
45void kvm_inject_undefined(struct kvm_vcpu *vcpu);
46void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
47void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
48
49static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
50{
51 vcpu->arch.hcr = HCR_GUEST_MASK;
52}
53
54static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
55{
56 return vcpu->arch.hcr;
57}
58
59static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
60{
61 vcpu->arch.hcr = hcr;
62}
63
64static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
65{
66 return 1;
67}
68
69static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
70{
71 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
72}
73
74static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
75{
76 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
77}
78
79static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
80{
81 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
82}
83
84static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
85{
86 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
87 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
88}
89
90static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
91{
92 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
93 return cpsr_mode > USR_MODE;;
94}
95
96static inline u32 kvm_vcpu_get_hsr(struct kvm_vcpu *vcpu)
97{
98 return vcpu->arch.fault.hsr;
99}
100
101static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
102{
103 return vcpu->arch.fault.hxfar;
104}
105
106static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
107{
108 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
109}
110
111static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
112{
113 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
114}
115
116static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
117{
118 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
119}
120
121static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
122{
123 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
124}
125
126static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
127{
128 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
129}
130
131static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
132{
133 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_EA;
134}
135
136static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
137{
138 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
139}
140
141static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
142{
143 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
144}
145
146/* Get Access Size from a data abort */
147static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
148{
149 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
150 case 0:
151 return 1;
152 case 1:
153 return 2;
154 case 2:
155 return 4;
156 default:
157 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
158 return -EFAULT;
159 }
160}
161
162/* This one is not specific to Data Abort */
163static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
164{
165 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
166}
167
168static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
169{
170 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
171}
172
173static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
174{
175 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
176}
177
178static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
179{
180 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
181}
182
183static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
184{
185 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
186}
187
188static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
189{
190 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
191}
192
193static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
194{
195 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
196}
197
198static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
199{
200 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
201}
202
203static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
204{
205 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
206}
207
208static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
209 unsigned long data,
210 unsigned int len)
211{
212 if (kvm_vcpu_is_be(vcpu)) {
213 switch (len) {
214 case 1:
215 return data & 0xff;
216 case 2:
217 return be16_to_cpu(data & 0xffff);
218 default:
219 return be32_to_cpu(data);
220 }
221 } else {
222 switch (len) {
223 case 1:
224 return data & 0xff;
225 case 2:
226 return le16_to_cpu(data & 0xffff);
227 default:
228 return le32_to_cpu(data);
229 }
230 }
231}
232
233static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
234 unsigned long data,
235 unsigned int len)
236{
237 if (kvm_vcpu_is_be(vcpu)) {
238 switch (len) {
239 case 1:
240 return data & 0xff;
241 case 2:
242 return cpu_to_be16(data & 0xffff);
243 default:
244 return cpu_to_be32(data);
245 }
246 } else {
247 switch (len) {
248 case 1:
249 return data & 0xff;
250 case 2:
251 return cpu_to_le16(data & 0xffff);
252 default:
253 return cpu_to_le32(data);
254 }
255 }
256}
257
258#endif /* __ARM_KVM_EMULATE_H__ */