1 /*
2 * Copyright (C) 2015 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.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, see <http://www.gnu.org/licenses/>.
16 */
17
18 #ifndef __ARM_KVM_HYP_H__
19 #define __ARM_KVM_HYP_H__
20
21 #include <linux/compiler.h>
22 #include <linux/kvm_host.h>
23 #include <asm/cp15.h>
24 #include <asm/kvm_mmu.h>
25 #include <asm/vfp.h>
26
27 #define __hyp_text __section(.hyp.text) notrace
28
29 #define __ACCESS_VFP(CRn) \
30 "mrc", "mcr", __stringify(p10, 7, %0, CRn, cr0, 0), u32
31
32 #define write_special(v, r) \
33 asm volatile("msr " __stringify(r) ", %0" : : "r" (v))
34 #define read_special(r) ({ \
35 u32 __val; \
36 asm volatile("mrs %0, " __stringify(r) : "=r" (__val)); \
37 __val; \
38 })
39
40 #define TTBR0 __ACCESS_CP15_64(0, c2)
41 #define TTBR1 __ACCESS_CP15_64(1, c2)
42 #define VTTBR __ACCESS_CP15_64(6, c2)
43 #define PAR __ACCESS_CP15_64(0, c7)
44 #define CNTV_CVAL __ACCESS_CP15_64(3, c14)
45 #define CNTVOFF __ACCESS_CP15_64(4, c14)
46
47 #define MIDR __ACCESS_CP15(c0, 0, c0, 0)
48 #define CSSELR __ACCESS_CP15(c0, 2, c0, 0)
49 #define VPIDR __ACCESS_CP15(c0, 4, c0, 0)
50 #define VMPIDR __ACCESS_CP15(c0, 4, c0, 5)
51 #define SCTLR __ACCESS_CP15(c1, 0, c0, 0)
52 #define CPACR __ACCESS_CP15(c1, 0, c0, 2)
53 #define HCR __ACCESS_CP15(c1, 4, c1, 0)
54 #define HDCR __ACCESS_CP15(c1, 4, c1, 1)
55 #define HCPTR __ACCESS_CP15(c1, 4, c1, 2)
56 #define HSTR __ACCESS_CP15(c1, 4, c1, 3)
57 #define TTBCR __ACCESS_CP15(c2, 0, c0, 2)
58 #define HTCR __ACCESS_CP15(c2, 4, c0, 2)
59 #define VTCR __ACCESS_CP15(c2, 4, c1, 2)
60 #define DACR __ACCESS_CP15(c3, 0, c0, 0)
61 #define DFSR __ACCESS_CP15(c5, 0, c0, 0)
62 #define IFSR __ACCESS_CP15(c5, 0, c0, 1)
63 #define ADFSR __ACCESS_CP15(c5, 0, c1, 0)
64 #define AIFSR __ACCESS_CP15(c5, 0, c1, 1)
65 #define HSR __ACCESS_CP15(c5, 4, c2, 0)
66 #define DFAR __ACCESS_CP15(c6, 0, c0, 0)
67 #define IFAR __ACCESS_CP15(c6, 0, c0, 2)
68 #define HDFAR __ACCESS_CP15(c6, 4, c0, 0)
69 #define HIFAR __ACCESS_CP15(c6, 4, c0, 2)
70 #define HPFAR __ACCESS_CP15(c6, 4, c0, 4)
71 #define ICIALLUIS __ACCESS_CP15(c7, 0, c1, 0)
72 #define ATS1CPR __ACCESS_CP15(c7, 0, c8, 0)
73 #define TLBIALLIS __ACCESS_CP15(c8, 0, c3, 0)
74 #define TLBIALL __ACCESS_CP15(c8, 0, c7, 0)
75 #define TLBIALLNSNHIS __ACCESS_CP15(c8, 4, c3, 4)
76 #define PRRR __ACCESS_CP15(c10, 0, c2, 0)
77 #define NMRR __ACCESS_CP15(c10, 0, c2, 1)
78 #define AMAIR0 __ACCESS_CP15(c10, 0, c3, 0)
79 #define AMAIR1 __ACCESS_CP15(c10, 0, c3, 1)
80 #define VBAR __ACCESS_CP15(c12, 0, c0, 0)
81 #define CID __ACCESS_CP15(c13, 0, c0, 1)
82 #define TID_URW __ACCESS_CP15(c13, 0, c0, 2)
83 #define TID_URO __ACCESS_CP15(c13, 0, c0, 3)
84 #define TID_PRIV __ACCESS_CP15(c13, 0, c0, 4)
85 #define HTPIDR __ACCESS_CP15(c13, 4, c0, 2)
86 #define CNTKCTL __ACCESS_CP15(c14, 0, c1, 0)
87 #define CNTV_CTL __ACCESS_CP15(c14, 0, c3, 1)
88 #define CNTHCTL __ACCESS_CP15(c14, 4, c1, 0)
89
90 #define VFP_FPEXC __ACCESS_VFP(FPEXC)
91
92 /* AArch64 compatibility macros, only for the timer so far */
93 #define read_sysreg_el0(r) read_sysreg(r##_el0)
94 #define write_sysreg_el0(v, r) write_sysreg(v, r##_el0)
95
96 #define cntv_ctl_el0 CNTV_CTL
97 #define cntv_cval_el0 CNTV_CVAL
98 #define cntvoff_el2 CNTVOFF
99 #define cnthctl_el2 CNTHCTL
100
101 void __timer_save_state(struct kvm_vcpu *vcpu);
102 void __timer_restore_state(struct kvm_vcpu *vcpu);
103
104 void __vgic_v2_save_state(struct kvm_vcpu *vcpu);
105 void __vgic_v2_restore_state(struct kvm_vcpu *vcpu);
106
107 void __sysreg_save_state(struct kvm_cpu_context *ctxt);
108 void __sysreg_restore_state(struct kvm_cpu_context *ctxt);
109
110 void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
111 void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
112
113 void asmlinkage __vfp_save_state(struct vfp_hard_struct *vfp);
114 void asmlinkage __vfp_restore_state(struct vfp_hard_struct *vfp);
__vfp_enabled(void)115 static inline bool __vfp_enabled(void)
116 {
117 return !(read_sysreg(HCPTR) & (HCPTR_TCP(11) | HCPTR_TCP(10)));
118 }
119
120 void __hyp_text __banked_save_state(struct kvm_cpu_context *ctxt);
121 void __hyp_text __banked_restore_state(struct kvm_cpu_context *ctxt);
122
123 int asmlinkage __guest_enter(struct kvm_vcpu *vcpu,
124 struct kvm_cpu_context *host);
125 int asmlinkage __hyp_do_panic(const char *, int, u32);
126
127 #endif /* __ARM_KVM_HYP_H__ */
128