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 #define __SMCCC_WORKAROUND_1_SMC_SZ 36 40 41 #ifndef __ASSEMBLY__ 42 43 #include <linux/mm.h> 44 45 /* Translate a kernel address of @sym into its equivalent linear mapping */ 46 #define kvm_ksym_ref(sym) \ 47 ({ \ 48 void *val = &sym; \ 49 if (!is_kernel_in_hyp_mode()) \ 50 val = lm_alias(&sym); \ 51 val; \ 52 }) 53 54 struct kvm; 55 struct kvm_vcpu; 56 57 extern char __kvm_hyp_init[]; 58 extern char __kvm_hyp_init_end[]; 59 60 extern char __kvm_hyp_vector[]; 61 62 extern void __kvm_flush_vm_context(void); 63 extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); 64 extern void __kvm_tlb_flush_vmid(struct kvm *kvm); 65 extern void __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu); 66 67 extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high); 68 69 extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu); 70 71 extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu); 72 73 extern u64 __vgic_v3_get_ich_vtr_el2(void); 74 extern u64 __vgic_v3_read_vmcr(void); 75 extern void __vgic_v3_write_vmcr(u32 vmcr); 76 extern void __vgic_v3_init_lrs(void); 77 78 extern u32 __kvm_get_mdcr_el2(void); 79 80 extern char __smccc_workaround_1_smc[__SMCCC_WORKAROUND_1_SMC_SZ]; 81 82 /* Home-grown __this_cpu_{ptr,read} variants that always work at HYP */ 83 #define __hyp_this_cpu_ptr(sym) \ 84 ({ \ 85 void *__ptr = hyp_symbol_addr(sym); \ 86 __ptr += read_sysreg(tpidr_el2); \ 87 (typeof(&sym))__ptr; \ 88 }) 89 90 #define __hyp_this_cpu_read(sym) \ 91 ({ \ 92 *__hyp_this_cpu_ptr(sym); \ 93 }) 94 95 #else /* __ASSEMBLY__ */ 96 97 .macro hyp_adr_this_cpu reg, sym, tmp 98 adr_l \reg, \sym 99 mrs \tmp, tpidr_el2 100 add \reg, \reg, \tmp 101 .endm 102 103 .macro hyp_ldr_this_cpu reg, sym, tmp 104 adr_l \reg, \sym 105 mrs \tmp, tpidr_el2 106 ldr \reg, [\reg, \tmp] 107 .endm 108 109 .macro get_host_ctxt reg, tmp 110 hyp_adr_this_cpu \reg, kvm_host_data, \tmp 111 add \reg, \reg, #HOST_DATA_CONTEXT 112 .endm 113 114 .macro get_vcpu_ptr vcpu, ctxt 115 get_host_ctxt \ctxt, \vcpu 116 ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] 117 kern_hyp_va \vcpu 118 .endm 119 120 #endif 121 122 #endif /* __ARM_KVM_ASM_H__ */ 123