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[linux/fpc-iii.git] / arch / arm64 / include / asm / kvm_asm.h
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1 /*
2 * Copyright (C) 2012,2013 - 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 __ARM_KVM_ASM_H__
19 #define __ARM_KVM_ASM_H__
21 #include <asm/virt.h>
23 #define VCPU_WORKAROUND_2_FLAG_SHIFT 0
24 #define VCPU_WORKAROUND_2_FLAG (_AC(1, UL) << VCPU_WORKAROUND_2_FLAG_SHIFT)
26 #define ARM_EXIT_WITH_SERROR_BIT 31
27 #define ARM_EXCEPTION_CODE(x) ((x) & ~(1U << ARM_EXIT_WITH_SERROR_BIT))
28 #define ARM_SERROR_PENDING(x) !!((x) & (1U << ARM_EXIT_WITH_SERROR_BIT))
30 #define ARM_EXCEPTION_IRQ 0
31 #define ARM_EXCEPTION_EL1_SERROR 1
32 #define ARM_EXCEPTION_TRAP 2
33 /* The hyp-stub will return this for any kvm_call_hyp() call */
34 #define ARM_EXCEPTION_HYP_GONE HVC_STUB_ERR
36 #ifndef __ASSEMBLY__
38 #include <linux/mm.h>
40 /* Translate a kernel address of @sym into its equivalent linear mapping */
41 #define kvm_ksym_ref(sym) \
42 ({ \
43 void *val = &sym; \
44 if (!is_kernel_in_hyp_mode()) \
45 val = lm_alias(&sym); \
46 val; \
49 struct kvm;
50 struct kvm_vcpu;
52 extern char __kvm_hyp_init[];
53 extern char __kvm_hyp_init_end[];
55 extern char __kvm_hyp_vector[];
57 extern void __kvm_flush_vm_context(void);
58 extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
59 extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
60 extern void __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu);
62 extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high);
64 extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu);
66 extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu);
68 extern u64 __vgic_v3_get_ich_vtr_el2(void);
69 extern u64 __vgic_v3_read_vmcr(void);
70 extern void __vgic_v3_write_vmcr(u32 vmcr);
71 extern void __vgic_v3_init_lrs(void);
73 extern u32 __kvm_get_mdcr_el2(void);
75 extern u32 __init_stage2_translation(void);
77 /* Home-grown __this_cpu_{ptr,read} variants that always work at HYP */
78 #define __hyp_this_cpu_ptr(sym) \
79 ({ \
80 void *__ptr = hyp_symbol_addr(sym); \
81 __ptr += read_sysreg(tpidr_el2); \
82 (typeof(&sym))__ptr; \
85 #define __hyp_this_cpu_read(sym) \
86 ({ \
87 *__hyp_this_cpu_ptr(sym); \
90 #else /* __ASSEMBLY__ */
92 .macro hyp_adr_this_cpu reg, sym, tmp
93 adr_l \reg, \sym
94 mrs \tmp, tpidr_el2
95 add \reg, \reg, \tmp
96 .endm
98 .macro hyp_ldr_this_cpu reg, sym, tmp
99 adr_l \reg, \sym
100 mrs \tmp, tpidr_el2
101 ldr \reg, [\reg, \tmp]
102 .endm
104 .macro get_host_ctxt reg, tmp
105 hyp_adr_this_cpu \reg, kvm_host_cpu_state, \tmp
106 .endm
108 .macro get_vcpu_ptr vcpu, ctxt
109 get_host_ctxt \ctxt, \vcpu
110 ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU]
111 kern_hyp_va \vcpu
112 .endm
114 #endif
116 #endif /* __ARM_KVM_ASM_H__ */