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_SERROR_PENDING(x) !!((x) & (1U << ARM_EXIT_WITH_SERROR_BIT)) 29 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 35 36 #ifndef __ASSEMBLY__ 37 38 #include <linux/mm.h> 39 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; \ 47 }) 48 49 struct kvm; 50 struct kvm_vcpu; 51 52 extern char __kvm_hyp_init[]; 53 extern char __kvm_hyp_init_end[]; 54 55 extern char __kvm_hyp_vector[]; 56 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); 61 62 extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high); 63 64 extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu); 65 66 extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu); 67 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); 72 73 extern u32 __kvm_get_mdcr_el2(void); 74 75 extern u32 __init_stage2_translation(void); 76 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; \ 83 }) 84 85 #define __hyp_this_cpu_read(sym) \ 86 ({ \ 87 *__hyp_this_cpu_ptr(sym); \ 88 }) 89 90 #else /* __ASSEMBLY__ */ 91 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 97 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 103 104 .macro get_host_ctxt reg, tmp 105 hyp_adr_this_cpu \reg, kvm_host_cpu_state, \tmp 106 .endm 107 108 .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 113 114 #endif 115 116 #endif /* __ARM_KVM_ASM_H__ */ 117