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