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) 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
101void __timer_enable_traps(struct kvm_vcpu *vcpu);
102void __timer_disable_traps(struct kvm_vcpu *vcpu);
103
104void __vgic_v2_save_state(struct kvm_vcpu *vcpu);
105void __vgic_v2_restore_state(struct kvm_vcpu *vcpu);
106
107void __sysreg_save_state(struct kvm_cpu_context *ctxt);
108void __sysreg_restore_state(struct kvm_cpu_context *ctxt);
109
110void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
111void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
112
113asmlinkage void __vfp_save_state(struct vfp_hard_struct *vfp);
114asmlinkage void __vfp_restore_state(struct vfp_hard_struct *vfp);
115static inline bool __vfp_enabled(void)
116{
117 return !(read_sysreg(HCPTR) & (HCPTR_TCP(11) | HCPTR_TCP(10)));
118}
119
120void __hyp_text __banked_save_state(struct kvm_cpu_context *ctxt);
121void __hyp_text __banked_restore_state(struct kvm_cpu_context *ctxt);
122
123asmlinkage int __guest_enter(struct kvm_vcpu *vcpu,
124 struct kvm_cpu_context *host);
125asmlinkage int __hyp_do_panic(const char *, int, u32);
126
127#endif /* __ARM_KVM_HYP_H__ */