1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __KVM_X86_VMX_HYPERV_H 3#define __KVM_X86_VMX_HYPERV_H 4 5#include <linux/jump_label.h> 6 7#include <asm/hyperv-tlfs.h> 8#include <asm/mshyperv.h> 9#include <asm/vmx.h> 10 11#include "../hyperv.h" 12 13#include "capabilities.h" 14#include "vmcs.h" 15#include "vmcs12.h" 16 17struct vmcs_config; 18 19#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs)) 20 21#define KVM_EVMCS_VERSION 1 22 23struct evmcs_field { 24 u16 offset; 25 u16 clean_field; 26}; 27 28extern const struct evmcs_field vmcs_field_to_evmcs_1[]; 29extern const unsigned int nr_evmcs_1_fields; 30 31static __always_inline int evmcs_field_offset(unsigned long field, 32 u16 *clean_field) 33{ 34 unsigned int index = ROL16(field, 6); 35 const struct evmcs_field *evmcs_field; 36 37 if (unlikely(index >= nr_evmcs_1_fields)) 38 return -ENOENT; 39 40 evmcs_field = &vmcs_field_to_evmcs_1[index]; 41 42 /* 43 * Use offset=0 to detect holes in eVMCS. This offset belongs to 44 * 'revision_id' but this field has no encoding and is supposed to 45 * be accessed directly. 46 */ 47 if (unlikely(!evmcs_field->offset)) 48 return -ENOENT; 49 50 if (clean_field) 51 *clean_field = evmcs_field->clean_field; 52 53 return evmcs_field->offset; 54} 55 56static inline u64 evmcs_read_any(struct hv_enlightened_vmcs *evmcs, 57 unsigned long field, u16 offset) 58{ 59 /* 60 * vmcs12_read_any() doesn't care whether the supplied structure 61 * is 'struct vmcs12' or 'struct hv_enlightened_vmcs' as it takes 62 * the exact offset of the required field, use it for convenience 63 * here. 64 */ 65 return vmcs12_read_any((void *)evmcs, field, offset); 66} 67 68#if IS_ENABLED(CONFIG_HYPERV) 69 70DECLARE_STATIC_KEY_FALSE(__kvm_is_using_evmcs); 71 72static __always_inline bool kvm_is_using_evmcs(void) 73{ 74 return static_branch_unlikely(&__kvm_is_using_evmcs); 75} 76 77static __always_inline int get_evmcs_offset(unsigned long field, 78 u16 *clean_field) 79{ 80 int offset = evmcs_field_offset(field, clean_field); 81 82 WARN_ONCE(offset < 0, "accessing unsupported EVMCS field %lx\n", field); 83 return offset; 84} 85 86static __always_inline void evmcs_write64(unsigned long field, u64 value) 87{ 88 u16 clean_field; 89 int offset = get_evmcs_offset(field, &clean_field); 90 91 if (offset < 0) 92 return; 93 94 *(u64 *)((char *)current_evmcs + offset) = value; 95 96 current_evmcs->hv_clean_fields &= ~clean_field; 97} 98 99static __always_inline void evmcs_write32(unsigned long field, u32 value) 100{ 101 u16 clean_field; 102 int offset = get_evmcs_offset(field, &clean_field); 103 104 if (offset < 0) 105 return; 106 107 *(u32 *)((char *)current_evmcs + offset) = value; 108 current_evmcs->hv_clean_fields &= ~clean_field; 109} 110 111static __always_inline void evmcs_write16(unsigned long field, u16 value) 112{ 113 u16 clean_field; 114 int offset = get_evmcs_offset(field, &clean_field); 115 116 if (offset < 0) 117 return; 118 119 *(u16 *)((char *)current_evmcs + offset) = value; 120 current_evmcs->hv_clean_fields &= ~clean_field; 121} 122 123static __always_inline u64 evmcs_read64(unsigned long field) 124{ 125 int offset = get_evmcs_offset(field, NULL); 126 127 if (offset < 0) 128 return 0; 129 130 return *(u64 *)((char *)current_evmcs + offset); 131} 132 133static __always_inline u32 evmcs_read32(unsigned long field) 134{ 135 int offset = get_evmcs_offset(field, NULL); 136 137 if (offset < 0) 138 return 0; 139 140 return *(u32 *)((char *)current_evmcs + offset); 141} 142 143static __always_inline u16 evmcs_read16(unsigned long field) 144{ 145 int offset = get_evmcs_offset(field, NULL); 146 147 if (offset < 0) 148 return 0; 149 150 return *(u16 *)((char *)current_evmcs + offset); 151} 152 153static inline void evmcs_load(u64 phys_addr) 154{ 155 struct hv_vp_assist_page *vp_ap = 156 hv_get_vp_assist_page(smp_processor_id()); 157 158 if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall) 159 vp_ap->nested_control.features.directhypercall = 1; 160 vp_ap->current_nested_vmcs = phys_addr; 161 vp_ap->enlighten_vmentry = 1; 162} 163 164void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf); 165#else /* !IS_ENABLED(CONFIG_HYPERV) */ 166static __always_inline bool kvm_is_using_evmcs(void) { return false; } 167static __always_inline void evmcs_write64(unsigned long field, u64 value) {} 168static __always_inline void evmcs_write32(unsigned long field, u32 value) {} 169static __always_inline void evmcs_write16(unsigned long field, u16 value) {} 170static __always_inline u64 evmcs_read64(unsigned long field) { return 0; } 171static __always_inline u32 evmcs_read32(unsigned long field) { return 0; } 172static __always_inline u16 evmcs_read16(unsigned long field) { return 0; } 173static inline void evmcs_load(u64 phys_addr) {} 174#endif /* IS_ENABLED(CONFIG_HYPERV) */ 175 176#define EVMPTR_INVALID (-1ULL) 177#define EVMPTR_MAP_PENDING (-2ULL) 178 179static inline bool evmptr_is_valid(u64 evmptr) 180{ 181 return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING; 182} 183 184enum nested_evmptrld_status { 185 EVMPTRLD_DISABLED, 186 EVMPTRLD_SUCCEEDED, 187 EVMPTRLD_VMFAIL, 188 EVMPTRLD_ERROR, 189}; 190 191u64 nested_get_evmptr(struct kvm_vcpu *vcpu); 192uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu); 193int nested_enable_evmcs(struct kvm_vcpu *vcpu, 194 uint16_t *vmcs_version); 195void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 196int nested_evmcs_check_controls(struct vmcs12 *vmcs12); 197bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu); 198void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu); 199 200#endif /* __KVM_X86_VMX_HYPERV_H */ 201