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git.proxmox.com Git - mirror_ubuntu-kernels.git/blob - arch/arm64/include/asm/kvm_hyp.h
2 * Copyright (C) 2015 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.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, see <http://www.gnu.org/licenses/>.
18 #ifndef __ARM64_KVM_HYP_H__
19 #define __ARM64_KVM_HYP_H__
21 #include <linux/compiler.h>
22 #include <linux/kvm_host.h>
23 #include <asm/kvm_mmu.h>
24 #include <asm/sysreg.h>
26 #define __hyp_text __section(.hyp.text) notrace
28 static inline unsigned long __kern_hyp_va(unsigned long v
)
30 asm volatile(ALTERNATIVE("and %0, %0, %1",
32 ARM64_HAS_VIRT_HOST_EXTN
)
33 : "+r" (v
) : "i" (HYP_PAGE_OFFSET_MASK
));
37 #define kern_hyp_va(v) (typeof(v))(__kern_hyp_va((unsigned long)(v)))
39 static inline unsigned long __hyp_kern_va(unsigned long v
)
41 u64 offset
= PAGE_OFFSET
- HYP_PAGE_OFFSET
;
42 asm volatile(ALTERNATIVE("add %0, %0, %1",
44 ARM64_HAS_VIRT_HOST_EXTN
)
45 : "+r" (v
) : "r" (offset
));
49 #define hyp_kern_va(v) (typeof(v))(__hyp_kern_va((unsigned long)(v)))
51 #define read_sysreg_elx(r,nvh,vh) \
54 asm volatile(ALTERNATIVE("mrs %0, " __stringify(r##nvh),\
55 "mrs_s %0, " __stringify(r##vh),\
56 ARM64_HAS_VIRT_HOST_EXTN) \
61 #define write_sysreg_elx(v,r,nvh,vh) \
63 u64 __val = (u64)(v); \
64 asm volatile(ALTERNATIVE("msr " __stringify(r##nvh) ", %x0",\
65 "msr_s " __stringify(r##vh) ", %x0",\
66 ARM64_HAS_VIRT_HOST_EXTN) \
71 * Unified accessors for registers that have a different encoding
72 * between VHE and non-VHE. They must be specified without their "ELx"
75 #define read_sysreg_el2(r) \
78 asm volatile(ALTERNATIVE("mrs %0, " __stringify(r##_EL2),\
79 "mrs %0, " __stringify(r##_EL1),\
80 ARM64_HAS_VIRT_HOST_EXTN) \
85 #define write_sysreg_el2(v,r) \
87 u64 __val = (u64)(v); \
88 asm volatile(ALTERNATIVE("msr " __stringify(r##_EL2) ", %x0",\
89 "msr " __stringify(r##_EL1) ", %x0",\
90 ARM64_HAS_VIRT_HOST_EXTN) \
94 #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02)
95 #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02)
96 #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12)
97 #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12)
99 /* The VHE specific system registers and their encoding */
100 #define sctlr_EL12 sys_reg(3, 5, 1, 0, 0)
101 #define cpacr_EL12 sys_reg(3, 5, 1, 0, 2)
102 #define ttbr0_EL12 sys_reg(3, 5, 2, 0, 0)
103 #define ttbr1_EL12 sys_reg(3, 5, 2, 0, 1)
104 #define tcr_EL12 sys_reg(3, 5, 2, 0, 2)
105 #define afsr0_EL12 sys_reg(3, 5, 5, 1, 0)
106 #define afsr1_EL12 sys_reg(3, 5, 5, 1, 1)
107 #define esr_EL12 sys_reg(3, 5, 5, 2, 0)
108 #define far_EL12 sys_reg(3, 5, 6, 0, 0)
109 #define mair_EL12 sys_reg(3, 5, 10, 2, 0)
110 #define amair_EL12 sys_reg(3, 5, 10, 3, 0)
111 #define vbar_EL12 sys_reg(3, 5, 12, 0, 0)
112 #define contextidr_EL12 sys_reg(3, 5, 13, 0, 1)
113 #define cntkctl_EL12 sys_reg(3, 5, 14, 1, 0)
114 #define cntp_tval_EL02 sys_reg(3, 5, 14, 2, 0)
115 #define cntp_ctl_EL02 sys_reg(3, 5, 14, 2, 1)
116 #define cntp_cval_EL02 sys_reg(3, 5, 14, 2, 2)
117 #define cntv_tval_EL02 sys_reg(3, 5, 14, 3, 0)
118 #define cntv_ctl_EL02 sys_reg(3, 5, 14, 3, 1)
119 #define cntv_cval_EL02 sys_reg(3, 5, 14, 3, 2)
120 #define spsr_EL12 sys_reg(3, 5, 4, 0, 0)
121 #define elr_EL12 sys_reg(3, 5, 4, 0, 1)
124 * hyp_alternate_select - Generates patchable code sequences that are
125 * used to switch between two implementations of a function, depending
126 * on the availability of a feature.
128 * @fname: a symbol name that will be defined as a function returning a
129 * function pointer whose type will match @orig and @alt
130 * @orig: A pointer to the default function, as returned by @fname when
132 * @alt: A pointer to the alternate function, as returned by @fname
134 * @cond: a CPU feature (as described in asm/cpufeature.h)
136 #define hyp_alternate_select(fname, orig, alt, cond) \
137 typeof(orig) * __hyp_text fname(void) \
139 typeof(alt) *val = orig; \
140 asm volatile(ALTERNATIVE("nop \n", \
143 : "+r" (val) : "r" (alt)); \
147 void __vgic_v2_save_state(struct kvm_vcpu
*vcpu
);
148 void __vgic_v2_restore_state(struct kvm_vcpu
*vcpu
);
150 void __vgic_v3_save_state(struct kvm_vcpu
*vcpu
);
151 void __vgic_v3_restore_state(struct kvm_vcpu
*vcpu
);
153 void __timer_save_state(struct kvm_vcpu
*vcpu
);
154 void __timer_restore_state(struct kvm_vcpu
*vcpu
);
156 void __sysreg_save_host_state(struct kvm_cpu_context
*ctxt
);
157 void __sysreg_restore_host_state(struct kvm_cpu_context
*ctxt
);
158 void __sysreg_save_guest_state(struct kvm_cpu_context
*ctxt
);
159 void __sysreg_restore_guest_state(struct kvm_cpu_context
*ctxt
);
160 void __sysreg32_save_state(struct kvm_vcpu
*vcpu
);
161 void __sysreg32_restore_state(struct kvm_vcpu
*vcpu
);
163 void __debug_save_state(struct kvm_vcpu
*vcpu
,
164 struct kvm_guest_debug_arch
*dbg
,
165 struct kvm_cpu_context
*ctxt
);
166 void __debug_restore_state(struct kvm_vcpu
*vcpu
,
167 struct kvm_guest_debug_arch
*dbg
,
168 struct kvm_cpu_context
*ctxt
);
169 void __debug_cond_save_host_state(struct kvm_vcpu
*vcpu
);
170 void __debug_cond_restore_host_state(struct kvm_vcpu
*vcpu
);
172 void __fpsimd_save_state(struct user_fpsimd_state
*fp_regs
);
173 void __fpsimd_restore_state(struct user_fpsimd_state
*fp_regs
);
174 bool __fpsimd_enabled(void);
176 u64
__guest_enter(struct kvm_vcpu
*vcpu
, struct kvm_cpu_context
*host_ctxt
);
177 void __noreturn
__hyp_do_panic(unsigned long, ...);
179 #endif /* __ARM64_KVM_HYP_H__ */