1/* SPDX-License-Identifier: GPL-2.0-only */ 2 3#ifndef __ARCH_X86_KVM_VMX_ONHYPERV_H__ 4#define __ARCH_X86_KVM_VMX_ONHYPERV_H__ 5 6#include <asm/hyperv-tlfs.h> 7#include <asm/mshyperv.h> 8 9#include <linux/jump_label.h> 10 11#include "capabilities.h" 12#include "hyperv_evmcs.h" 13#include "vmcs12.h" 14 15#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs)) 16 17#if IS_ENABLED(CONFIG_HYPERV) 18 19DECLARE_STATIC_KEY_FALSE(__kvm_is_using_evmcs); 20 21static __always_inline bool kvm_is_using_evmcs(void) 22{ 23 return static_branch_unlikely(&__kvm_is_using_evmcs); 24} 25 26static __always_inline int get_evmcs_offset(unsigned long field, 27 u16 *clean_field) 28{ 29 int offset = evmcs_field_offset(field, clean_field); 30 31 WARN_ONCE(offset < 0, "accessing unsupported EVMCS field %lx\n", field); 32 return offset; 33} 34 35static __always_inline void evmcs_write64(unsigned long field, u64 value) 36{ 37 u16 clean_field; 38 int offset = get_evmcs_offset(field, &clean_field); 39 40 if (offset < 0) 41 return; 42 43 *(u64 *)((char *)current_evmcs + offset) = value; 44 45 current_evmcs->hv_clean_fields &= ~clean_field; 46} 47 48static __always_inline void evmcs_write32(unsigned long field, u32 value) 49{ 50 u16 clean_field; 51 int offset = get_evmcs_offset(field, &clean_field); 52 53 if (offset < 0) 54 return; 55 56 *(u32 *)((char *)current_evmcs + offset) = value; 57 current_evmcs->hv_clean_fields &= ~clean_field; 58} 59 60static __always_inline void evmcs_write16(unsigned long field, u16 value) 61{ 62 u16 clean_field; 63 int offset = get_evmcs_offset(field, &clean_field); 64 65 if (offset < 0) 66 return; 67 68 *(u16 *)((char *)current_evmcs + offset) = value; 69 current_evmcs->hv_clean_fields &= ~clean_field; 70} 71 72static __always_inline u64 evmcs_read64(unsigned long field) 73{ 74 int offset = get_evmcs_offset(field, NULL); 75 76 if (offset < 0) 77 return 0; 78 79 return *(u64 *)((char *)current_evmcs + offset); 80} 81 82static __always_inline u32 evmcs_read32(unsigned long field) 83{ 84 int offset = get_evmcs_offset(field, NULL); 85 86 if (offset < 0) 87 return 0; 88 89 return *(u32 *)((char *)current_evmcs + offset); 90} 91 92static __always_inline u16 evmcs_read16(unsigned long field) 93{ 94 int offset = get_evmcs_offset(field, NULL); 95 96 if (offset < 0) 97 return 0; 98 99 return *(u16 *)((char *)current_evmcs + offset); 100} 101 102static inline void evmcs_load(u64 phys_addr) 103{ 104 struct hv_vp_assist_page *vp_ap = 105 hv_get_vp_assist_page(smp_processor_id()); 106 107 if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall) 108 vp_ap->nested_control.features.directhypercall = 1; 109 vp_ap->current_nested_vmcs = phys_addr; 110 vp_ap->enlighten_vmentry = 1; 111} 112 113void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf); 114#else /* !IS_ENABLED(CONFIG_HYPERV) */ 115static __always_inline bool kvm_is_using_evmcs(void) { return false; } 116static __always_inline void evmcs_write64(unsigned long field, u64 value) {} 117static __always_inline void evmcs_write32(unsigned long field, u32 value) {} 118static __always_inline void evmcs_write16(unsigned long field, u16 value) {} 119static __always_inline u64 evmcs_read64(unsigned long field) { return 0; } 120static __always_inline u32 evmcs_read32(unsigned long field) { return 0; } 121static __always_inline u16 evmcs_read16(unsigned long field) { return 0; } 122static inline void evmcs_load(u64 phys_addr) {} 123#endif /* IS_ENABLED(CONFIG_HYPERV) */ 124 125#endif /* __ARCH_X86_KVM_VMX_ONHYPERV_H__ */ 126