1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 - ARM Ltd 4 * Author: Marc Zyngier <marc.zyngier@arm.com> 5 */ 6 7 #ifndef __ARM64_KVM_HYP_H__ 8 #define __ARM64_KVM_HYP_H__ 9 10 #include <linux/compiler.h> 11 #include <linux/kvm_host.h> 12 #include <asm/alternative.h> 13 #include <asm/sysreg.h> 14 15 DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt); 16 DECLARE_PER_CPU(unsigned long, kvm_hyp_vector); 17 DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); 18 19 /* 20 * Unified accessors for registers that have a different encoding 21 * between VHE and non-VHE. They must be specified without their "ELx" 22 * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. 23 */ 24 25 #if defined(__KVM_VHE_HYPERVISOR__) 26 27 #define read_sysreg_el0(r) read_sysreg_s(r##_EL02) 28 #define write_sysreg_el0(v,r) write_sysreg_s(v, r##_EL02) 29 #define read_sysreg_el1(r) read_sysreg_s(r##_EL12) 30 #define write_sysreg_el1(v,r) write_sysreg_s(v, r##_EL12) 31 #define read_sysreg_el2(r) read_sysreg_s(r##_EL1) 32 #define write_sysreg_el2(v,r) write_sysreg_s(v, r##_EL1) 33 34 #else // !__KVM_VHE_HYPERVISOR__ 35 36 #if defined(__KVM_NVHE_HYPERVISOR__) 37 #define VHE_ALT_KEY ARM64_KVM_HVHE 38 #else 39 #define VHE_ALT_KEY ARM64_HAS_VIRT_HOST_EXTN 40 #endif 41 42 #define read_sysreg_elx(r,nvh,vh) \ 43 ({ \ 44 u64 reg; \ 45 asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ 46 __mrs_s("%0", r##vh), \ 47 VHE_ALT_KEY) \ 48 : "=r" (reg)); \ 49 reg; \ 50 }) 51 52 #define write_sysreg_elx(v,r,nvh,vh) \ 53 do { \ 54 u64 __val = (u64)(v); \ 55 asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ 56 __msr_s(r##vh, "%x0"), \ 57 VHE_ALT_KEY) \ 58 : : "rZ" (__val)); \ 59 } while (0) 60 61 #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) 62 #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) 63 #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) 64 #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) 65 #define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) 66 #define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) 67 68 #endif // __KVM_VHE_HYPERVISOR__ 69 70 /* 71 * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the 72 * static inline can allow the compiler to out-of-line this. KVM always wants 73 * the macro version as its always inlined. 74 */ 75 #define __kvm_swab32(x) ___constant_swab32(x) 76 77 int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); 78 79 void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); 80 void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); 81 void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); 82 void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); 83 void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); 84 void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); 85 int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); 86 87 #ifdef __KVM_NVHE_HYPERVISOR__ 88 void __timer_enable_traps(struct kvm_vcpu *vcpu); 89 void __timer_disable_traps(struct kvm_vcpu *vcpu); 90 #endif 91 92 #ifdef __KVM_NVHE_HYPERVISOR__ 93 void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); 94 void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); 95 #else 96 void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); 97 void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); 98 void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); 99 void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); 100 #endif 101 102 void __debug_switch_to_guest(struct kvm_vcpu *vcpu); 103 void __debug_switch_to_host(struct kvm_vcpu *vcpu); 104 105 #ifdef __KVM_NVHE_HYPERVISOR__ 106 void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu); 107 void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu); 108 #endif 109 110 void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); 111 void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); 112 void __sve_restore_state(void *sve_pffr, u32 *fpsr); 113 114 #ifndef __KVM_NVHE_HYPERVISOR__ 115 void activate_traps_vhe_load(struct kvm_vcpu *vcpu); 116 void deactivate_traps_vhe_put(struct kvm_vcpu *vcpu); 117 #endif 118 119 u64 __guest_enter(struct kvm_vcpu *vcpu); 120 121 bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt); 122 123 #ifdef __KVM_NVHE_HYPERVISOR__ 124 void __noreturn __hyp_do_panic(struct kvm_cpu_context *host_ctxt, u64 spsr, 125 u64 elr, u64 par); 126 #endif 127 128 #ifdef __KVM_NVHE_HYPERVISOR__ 129 void __pkvm_init_switch_pgd(phys_addr_t phys, unsigned long size, 130 phys_addr_t pgd, void *sp, void *cont_fn); 131 int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus, 132 unsigned long *per_cpu_base, u32 hyp_va_bits); 133 void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); 134 #endif 135 136 extern u64 kvm_nvhe_sym(id_aa64pfr0_el1_sys_val); 137 extern u64 kvm_nvhe_sym(id_aa64pfr1_el1_sys_val); 138 extern u64 kvm_nvhe_sym(id_aa64isar0_el1_sys_val); 139 extern u64 kvm_nvhe_sym(id_aa64isar1_el1_sys_val); 140 extern u64 kvm_nvhe_sym(id_aa64isar2_el1_sys_val); 141 extern u64 kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val); 142 extern u64 kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val); 143 extern u64 kvm_nvhe_sym(id_aa64mmfr2_el1_sys_val); 144 extern u64 kvm_nvhe_sym(id_aa64smfr0_el1_sys_val); 145 146 extern unsigned long kvm_nvhe_sym(__icache_flags); 147 extern unsigned int kvm_nvhe_sym(kvm_arm_vmid_bits); 148 149 #endif /* __ARM64_KVM_HYP_H__ */ 150