1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_MSHYPER_H 3 #define _ASM_X86_MSHYPER_H 4 5 #include <linux/types.h> 6 #include <linux/nmi.h> 7 #include <linux/msi.h> 8 #include <asm/io.h> 9 #include <asm/hyperv-tlfs.h> 10 #include <asm/nospec-branch.h> 11 #include <asm/paravirt.h> 12 13 typedef int (*hyperv_fill_flush_list_func)( 14 struct hv_guest_mapping_flush_list *flush, 15 void *data); 16 17 static inline void hv_set_register(unsigned int reg, u64 value) 18 { 19 wrmsrl(reg, value); 20 } 21 22 static inline u64 hv_get_register(unsigned int reg) 23 { 24 u64 value; 25 26 rdmsrl(reg, value); 27 return value; 28 } 29 30 #define hv_get_raw_timer() rdtsc_ordered() 31 32 void hyperv_vector_handler(struct pt_regs *regs); 33 34 #if IS_ENABLED(CONFIG_HYPERV) 35 extern int hyperv_init_cpuhp; 36 37 extern void *hv_hypercall_pg; 38 extern void __percpu **hyperv_pcpu_input_arg; 39 extern void __percpu **hyperv_pcpu_output_arg; 40 41 extern u64 hv_current_partition_id; 42 43 int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); 44 int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); 45 int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); 46 47 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 48 { 49 u64 input_address = input ? virt_to_phys(input) : 0; 50 u64 output_address = output ? virt_to_phys(output) : 0; 51 u64 hv_status; 52 53 #ifdef CONFIG_X86_64 54 if (!hv_hypercall_pg) 55 return U64_MAX; 56 57 __asm__ __volatile__("mov %4, %%r8\n" 58 CALL_NOSPEC 59 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 60 "+c" (control), "+d" (input_address) 61 : "r" (output_address), 62 THUNK_TARGET(hv_hypercall_pg) 63 : "cc", "memory", "r8", "r9", "r10", "r11"); 64 #else 65 u32 input_address_hi = upper_32_bits(input_address); 66 u32 input_address_lo = lower_32_bits(input_address); 67 u32 output_address_hi = upper_32_bits(output_address); 68 u32 output_address_lo = lower_32_bits(output_address); 69 70 if (!hv_hypercall_pg) 71 return U64_MAX; 72 73 __asm__ __volatile__(CALL_NOSPEC 74 : "=A" (hv_status), 75 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 76 : "A" (control), 77 "b" (input_address_hi), 78 "D"(output_address_hi), "S"(output_address_lo), 79 THUNK_TARGET(hv_hypercall_pg) 80 : "cc", "memory"); 81 #endif /* !x86_64 */ 82 return hv_status; 83 } 84 85 /* Fast hypercall with 8 bytes of input and no output */ 86 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 87 { 88 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 89 90 #ifdef CONFIG_X86_64 91 { 92 __asm__ __volatile__(CALL_NOSPEC 93 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 94 "+c" (control), "+d" (input1) 95 : THUNK_TARGET(hv_hypercall_pg) 96 : "cc", "r8", "r9", "r10", "r11"); 97 } 98 #else 99 { 100 u32 input1_hi = upper_32_bits(input1); 101 u32 input1_lo = lower_32_bits(input1); 102 103 __asm__ __volatile__ (CALL_NOSPEC 104 : "=A"(hv_status), 105 "+c"(input1_lo), 106 ASM_CALL_CONSTRAINT 107 : "A" (control), 108 "b" (input1_hi), 109 THUNK_TARGET(hv_hypercall_pg) 110 : "cc", "edi", "esi"); 111 } 112 #endif 113 return hv_status; 114 } 115 116 /* Fast hypercall with 16 bytes of input */ 117 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 118 { 119 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 120 121 #ifdef CONFIG_X86_64 122 { 123 __asm__ __volatile__("mov %4, %%r8\n" 124 CALL_NOSPEC 125 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 126 "+c" (control), "+d" (input1) 127 : "r" (input2), 128 THUNK_TARGET(hv_hypercall_pg) 129 : "cc", "r8", "r9", "r10", "r11"); 130 } 131 #else 132 { 133 u32 input1_hi = upper_32_bits(input1); 134 u32 input1_lo = lower_32_bits(input1); 135 u32 input2_hi = upper_32_bits(input2); 136 u32 input2_lo = lower_32_bits(input2); 137 138 __asm__ __volatile__ (CALL_NOSPEC 139 : "=A"(hv_status), 140 "+c"(input1_lo), ASM_CALL_CONSTRAINT 141 : "A" (control), "b" (input1_hi), 142 "D"(input2_hi), "S"(input2_lo), 143 THUNK_TARGET(hv_hypercall_pg) 144 : "cc"); 145 } 146 #endif 147 return hv_status; 148 } 149 150 extern struct hv_vp_assist_page **hv_vp_assist_page; 151 152 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 153 { 154 if (!hv_vp_assist_page) 155 return NULL; 156 157 return hv_vp_assist_page[cpu]; 158 } 159 160 void __init hyperv_init(void); 161 void hyperv_setup_mmu_ops(void); 162 void set_hv_tscchange_cb(void (*cb)(void)); 163 void clear_hv_tscchange_cb(void); 164 void hyperv_stop_tsc_emulation(void); 165 int hyperv_flush_guest_mapping(u64 as); 166 int hyperv_flush_guest_mapping_range(u64 as, 167 hyperv_fill_flush_list_func fill_func, void *data); 168 int hyperv_fill_flush_guest_mapping_list( 169 struct hv_guest_mapping_flush_list *flush, 170 u64 start_gfn, u64 end_gfn); 171 172 extern bool hv_root_partition; 173 174 #ifdef CONFIG_X86_64 175 void hv_apic_init(void); 176 void __init hv_init_spinlocks(void); 177 bool hv_vcpu_is_preempted(int vcpu); 178 #else 179 static inline void hv_apic_init(void) {} 180 #endif 181 182 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, 183 struct msi_desc *msi_desc) 184 { 185 msi_entry->address.as_uint32 = msi_desc->msg.address_lo; 186 msi_entry->data.as_uint32 = msi_desc->msg.data; 187 } 188 189 struct irq_domain *hv_create_pci_msi_domain(void); 190 191 int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, 192 struct hv_interrupt_entry *entry); 193 int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); 194 195 #else /* CONFIG_HYPERV */ 196 static inline void hyperv_init(void) {} 197 static inline void hyperv_setup_mmu_ops(void) {} 198 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 199 static inline void clear_hv_tscchange_cb(void) {} 200 static inline void hyperv_stop_tsc_emulation(void) {}; 201 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 202 { 203 return NULL; 204 } 205 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 206 static inline int hyperv_flush_guest_mapping_range(u64 as, 207 hyperv_fill_flush_list_func fill_func, void *data) 208 { 209 return -1; 210 } 211 #endif /* CONFIG_HYPERV */ 212 213 214 #include <asm-generic/mshyperv.h> 215 216 #endif 217