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 /* 34 * Size of the HYP vectors preamble. kvm_patch_vector_branch() generates code 35 * that jumps over this. 36 */ 37 #define KVM_VECTOR_PREAMBLE (2 * AARCH64_INSN_SIZE) 38 39 #ifndef __ASSEMBLY__ 40 41 #include <linux/mm.h> 42 43 /* Translate a kernel address of @sym into its equivalent linear mapping */ 44 #define kvm_ksym_ref(sym) \ 45 ({ \ 46 void *val = &sym; \ 47 if (!is_kernel_in_hyp_mode()) \ 48 val = lm_alias(&sym); \ 49 val; \ 50 }) 51 52 struct kvm; 53 struct kvm_vcpu; 54 55 extern char __kvm_hyp_init[]; 56 extern char __kvm_hyp_init_end[]; 57 58 extern char __kvm_hyp_vector[]; 59 60 extern void __kvm_flush_vm_context(void); 61 extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); 62 extern void __kvm_tlb_flush_vmid(struct kvm *kvm); 63 extern void __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu); 64 65 extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high); 66 67 extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu); 68 69 extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu); 70 71 extern u64 __vgic_v3_get_ich_vtr_el2(void); 72 extern u64 __vgic_v3_read_vmcr(void); 73 extern void __vgic_v3_write_vmcr(u32 vmcr); 74 extern void __vgic_v3_init_lrs(void); 75 76 extern u32 __kvm_get_mdcr_el2(void); 77 78 /* Home-grown __this_cpu_{ptr,read} variants that always work at HYP */ 79 #define __hyp_this_cpu_ptr(sym) \ 80 ({ \ 81 void *__ptr = hyp_symbol_addr(sym); \ 82 __ptr += read_sysreg(tpidr_el2); \ 83 (typeof(&sym))__ptr; \ 84 }) 85 86 #define __hyp_this_cpu_read(sym) \ 87 ({ \ 88 *__hyp_this_cpu_ptr(sym); \ 89 }) 90 91 #else /* __ASSEMBLY__ */ 92 93 .macro hyp_adr_this_cpu reg, sym, tmp 94 adr_l \reg, \sym 95 mrs \tmp, tpidr_el2 96 add \reg, \reg, \tmp 97 .endm 98 99 .macro hyp_ldr_this_cpu reg, sym, tmp 100 adr_l \reg, \sym 101 mrs \tmp, tpidr_el2 102 ldr \reg, [\reg, \tmp] 103 .endm 104 105 .macro get_host_ctxt reg, tmp 106 hyp_adr_this_cpu \reg, kvm_host_data, \tmp 107 add \reg, \reg, #HOST_DATA_CONTEXT 108 .endm 109 110 .macro get_vcpu_ptr vcpu, ctxt 111 get_host_ctxt \ctxt, \vcpu 112 ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] 113 kern_hyp_va \vcpu 114 .endm 115 116 #endif 117 118 #endif /* __ARM_KVM_ASM_H__ */ 119