1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012,2013 - ARM Ltd 4 * Author: Marc Zyngier <marc.zyngier@arm.com> 5 */ 6 7 #ifndef __ARM_KVM_ASM_H__ 8 #define __ARM_KVM_ASM_H__ 9 10 #include <asm/virt.h> 11 12 #define VCPU_WORKAROUND_2_FLAG_SHIFT 0 13 #define VCPU_WORKAROUND_2_FLAG (_AC(1, UL) << VCPU_WORKAROUND_2_FLAG_SHIFT) 14 15 #define ARM_EXIT_WITH_SERROR_BIT 31 16 #define ARM_EXCEPTION_CODE(x) ((x) & ~(1U << ARM_EXIT_WITH_SERROR_BIT)) 17 #define ARM_EXCEPTION_IS_TRAP(x) (ARM_EXCEPTION_CODE((x)) == ARM_EXCEPTION_TRAP) 18 #define ARM_SERROR_PENDING(x) !!((x) & (1U << ARM_EXIT_WITH_SERROR_BIT)) 19 20 #define ARM_EXCEPTION_IRQ 0 21 #define ARM_EXCEPTION_EL1_SERROR 1 22 #define ARM_EXCEPTION_TRAP 2 23 #define ARM_EXCEPTION_IL 3 24 /* The hyp-stub will return this for any kvm_call_hyp() call */ 25 #define ARM_EXCEPTION_HYP_GONE HVC_STUB_ERR 26 27 #define kvm_arm_exception_type \ 28 {ARM_EXCEPTION_IRQ, "IRQ" }, \ 29 {ARM_EXCEPTION_EL1_SERROR, "SERROR" }, \ 30 {ARM_EXCEPTION_TRAP, "TRAP" }, \ 31 {ARM_EXCEPTION_HYP_GONE, "HYP_GONE" } 32 33 #ifndef __ASSEMBLY__ 34 35 #include <linux/mm.h> 36 37 /* Translate a kernel address of @sym into its equivalent linear mapping */ 38 #define kvm_ksym_ref(sym) \ 39 ({ \ 40 void *val = &sym; \ 41 if (!is_kernel_in_hyp_mode()) \ 42 val = lm_alias(&sym); \ 43 val; \ 44 }) 45 46 struct kvm; 47 struct kvm_vcpu; 48 49 extern char __kvm_hyp_init[]; 50 extern char __kvm_hyp_init_end[]; 51 52 extern char __kvm_hyp_vector[]; 53 54 extern void __kvm_flush_vm_context(void); 55 extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); 56 extern void __kvm_tlb_flush_vmid(struct kvm *kvm); 57 extern void __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu); 58 59 extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high); 60 61 extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu); 62 63 extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu); 64 65 extern u64 __vgic_v3_get_ich_vtr_el2(void); 66 extern u64 __vgic_v3_read_vmcr(void); 67 extern void __vgic_v3_write_vmcr(u32 vmcr); 68 extern void __vgic_v3_init_lrs(void); 69 70 extern u32 __kvm_get_mdcr_el2(void); 71 72 /* Home-grown __this_cpu_{ptr,read} variants that always work at HYP */ 73 #define __hyp_this_cpu_ptr(sym) \ 74 ({ \ 75 void *__ptr = hyp_symbol_addr(sym); \ 76 __ptr += read_sysreg(tpidr_el2); \ 77 (typeof(&sym))__ptr; \ 78 }) 79 80 #define __hyp_this_cpu_read(sym) \ 81 ({ \ 82 *__hyp_this_cpu_ptr(sym); \ 83 }) 84 85 #else /* __ASSEMBLY__ */ 86 87 .macro hyp_adr_this_cpu reg, sym, tmp 88 adr_l \reg, \sym 89 mrs \tmp, tpidr_el2 90 add \reg, \reg, \tmp 91 .endm 92 93 .macro hyp_ldr_this_cpu reg, sym, tmp 94 adr_l \reg, \sym 95 mrs \tmp, tpidr_el2 96 ldr \reg, [\reg, \tmp] 97 .endm 98 99 .macro get_host_ctxt reg, tmp 100 hyp_adr_this_cpu \reg, kvm_host_data, \tmp 101 add \reg, \reg, #HOST_DATA_CONTEXT 102 .endm 103 104 .macro get_vcpu_ptr vcpu, ctxt 105 get_host_ctxt \ctxt, \vcpu 106 ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] 107 kern_hyp_va \vcpu 108 .endm 109 110 #endif 111 112 #endif /* __ARM_KVM_ASM_H__ */ 113