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 12 typedef int (*hyperv_fill_flush_list_func)( 13 struct hv_guest_mapping_flush_list *flush, 14 void *data); 15 16 #define hv_init_timer(timer, tick) \ 17 wrmsrl(HV_X64_MSR_STIMER0_COUNT + (2*timer), tick) 18 #define hv_init_timer_config(timer, val) \ 19 wrmsrl(HV_X64_MSR_STIMER0_CONFIG + (2*timer), val) 20 21 #define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val) 22 #define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val) 23 24 #define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val) 25 #define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val) 26 27 #define hv_get_synic_state(val) rdmsrl(HV_X64_MSR_SCONTROL, val) 28 #define hv_set_synic_state(val) wrmsrl(HV_X64_MSR_SCONTROL, val) 29 30 #define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index) 31 32 #define hv_signal_eom() wrmsrl(HV_X64_MSR_EOM, 0) 33 34 #define hv_get_synint_state(int_num, val) \ 35 rdmsrl(HV_X64_MSR_SINT0 + int_num, val) 36 #define hv_set_synint_state(int_num, val) \ 37 wrmsrl(HV_X64_MSR_SINT0 + int_num, val) 38 #define hv_recommend_using_aeoi() \ 39 (!(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED)) 40 41 #define hv_get_crash_ctl(val) \ 42 rdmsrl(HV_X64_MSR_CRASH_CTL, val) 43 44 #define hv_get_time_ref_count(val) \ 45 rdmsrl(HV_X64_MSR_TIME_REF_COUNT, val) 46 47 #define hv_get_reference_tsc(val) \ 48 rdmsrl(HV_X64_MSR_REFERENCE_TSC, val) 49 #define hv_set_reference_tsc(val) \ 50 wrmsrl(HV_X64_MSR_REFERENCE_TSC, val) 51 #define hv_set_clocksource_vdso(val) \ 52 ((val).vdso_clock_mode = VDSO_CLOCKMODE_HVCLOCK) 53 #define hv_enable_vdso_clocksource() \ 54 vclocks_set_used(VDSO_CLOCKMODE_HVCLOCK); 55 #define hv_get_raw_timer() rdtsc_ordered() 56 57 void hyperv_callback_vector(void); 58 void hyperv_reenlightenment_vector(void); 59 #ifdef CONFIG_TRACING 60 #define trace_hyperv_callback_vector hyperv_callback_vector 61 #endif 62 void hyperv_vector_handler(struct pt_regs *regs); 63 64 /* 65 * Routines for stimer0 Direct Mode handling. 66 * On x86/x64, there are no percpu actions to take. 67 */ 68 void hv_stimer0_vector_handler(struct pt_regs *regs); 69 void hv_stimer0_callback_vector(void); 70 71 static inline void hv_enable_stimer0_percpu_irq(int irq) {} 72 static inline void hv_disable_stimer0_percpu_irq(int irq) {} 73 74 75 #if IS_ENABLED(CONFIG_HYPERV) 76 extern void *hv_hypercall_pg; 77 extern void __percpu **hyperv_pcpu_input_arg; 78 79 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 80 { 81 u64 input_address = input ? virt_to_phys(input) : 0; 82 u64 output_address = output ? virt_to_phys(output) : 0; 83 u64 hv_status; 84 85 #ifdef CONFIG_X86_64 86 if (!hv_hypercall_pg) 87 return U64_MAX; 88 89 __asm__ __volatile__("mov %4, %%r8\n" 90 CALL_NOSPEC 91 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 92 "+c" (control), "+d" (input_address) 93 : "r" (output_address), 94 THUNK_TARGET(hv_hypercall_pg) 95 : "cc", "memory", "r8", "r9", "r10", "r11"); 96 #else 97 u32 input_address_hi = upper_32_bits(input_address); 98 u32 input_address_lo = lower_32_bits(input_address); 99 u32 output_address_hi = upper_32_bits(output_address); 100 u32 output_address_lo = lower_32_bits(output_address); 101 102 if (!hv_hypercall_pg) 103 return U64_MAX; 104 105 __asm__ __volatile__(CALL_NOSPEC 106 : "=A" (hv_status), 107 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 108 : "A" (control), 109 "b" (input_address_hi), 110 "D"(output_address_hi), "S"(output_address_lo), 111 THUNK_TARGET(hv_hypercall_pg) 112 : "cc", "memory"); 113 #endif /* !x86_64 */ 114 return hv_status; 115 } 116 117 /* Fast hypercall with 8 bytes of input and no output */ 118 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 119 { 120 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 121 122 #ifdef CONFIG_X86_64 123 { 124 __asm__ __volatile__(CALL_NOSPEC 125 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 126 "+c" (control), "+d" (input1) 127 : THUNK_TARGET(hv_hypercall_pg) 128 : "cc", "r8", "r9", "r10", "r11"); 129 } 130 #else 131 { 132 u32 input1_hi = upper_32_bits(input1); 133 u32 input1_lo = lower_32_bits(input1); 134 135 __asm__ __volatile__ (CALL_NOSPEC 136 : "=A"(hv_status), 137 "+c"(input1_lo), 138 ASM_CALL_CONSTRAINT 139 : "A" (control), 140 "b" (input1_hi), 141 THUNK_TARGET(hv_hypercall_pg) 142 : "cc", "edi", "esi"); 143 } 144 #endif 145 return hv_status; 146 } 147 148 /* Fast hypercall with 16 bytes of input */ 149 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 150 { 151 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 152 153 #ifdef CONFIG_X86_64 154 { 155 __asm__ __volatile__("mov %4, %%r8\n" 156 CALL_NOSPEC 157 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 158 "+c" (control), "+d" (input1) 159 : "r" (input2), 160 THUNK_TARGET(hv_hypercall_pg) 161 : "cc", "r8", "r9", "r10", "r11"); 162 } 163 #else 164 { 165 u32 input1_hi = upper_32_bits(input1); 166 u32 input1_lo = lower_32_bits(input1); 167 u32 input2_hi = upper_32_bits(input2); 168 u32 input2_lo = lower_32_bits(input2); 169 170 __asm__ __volatile__ (CALL_NOSPEC 171 : "=A"(hv_status), 172 "+c"(input1_lo), ASM_CALL_CONSTRAINT 173 : "A" (control), "b" (input1_hi), 174 "D"(input2_hi), "S"(input2_lo), 175 THUNK_TARGET(hv_hypercall_pg) 176 : "cc"); 177 } 178 #endif 179 return hv_status; 180 } 181 182 /* 183 * Rep hypercalls. Callers of this functions are supposed to ensure that 184 * rep_count and varhead_size comply with Hyper-V hypercall definition. 185 */ 186 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, 187 void *input, void *output) 188 { 189 u64 control = code; 190 u64 status; 191 u16 rep_comp; 192 193 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; 194 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; 195 196 do { 197 status = hv_do_hypercall(control, input, output); 198 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) 199 return status; 200 201 /* Bits 32-43 of status have 'Reps completed' data. */ 202 rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >> 203 HV_HYPERCALL_REP_COMP_OFFSET; 204 205 control &= ~HV_HYPERCALL_REP_START_MASK; 206 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; 207 208 touch_nmi_watchdog(); 209 } while (rep_comp < rep_count); 210 211 return status; 212 } 213 214 extern struct hv_vp_assist_page **hv_vp_assist_page; 215 216 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 217 { 218 if (!hv_vp_assist_page) 219 return NULL; 220 221 return hv_vp_assist_page[cpu]; 222 } 223 224 void __init hyperv_init(void); 225 void hyperv_setup_mmu_ops(void); 226 void *hv_alloc_hyperv_page(void); 227 void *hv_alloc_hyperv_zeroed_page(void); 228 void hv_free_hyperv_page(unsigned long addr); 229 void hyperv_reenlightenment_intr(struct pt_regs *regs); 230 void set_hv_tscchange_cb(void (*cb)(void)); 231 void clear_hv_tscchange_cb(void); 232 void hyperv_stop_tsc_emulation(void); 233 int hyperv_flush_guest_mapping(u64 as); 234 int hyperv_flush_guest_mapping_range(u64 as, 235 hyperv_fill_flush_list_func fill_func, void *data); 236 int hyperv_fill_flush_guest_mapping_list( 237 struct hv_guest_mapping_flush_list *flush, 238 u64 start_gfn, u64 end_gfn); 239 240 #ifdef CONFIG_X86_64 241 void hv_apic_init(void); 242 void __init hv_init_spinlocks(void); 243 bool hv_vcpu_is_preempted(int vcpu); 244 #else 245 static inline void hv_apic_init(void) {} 246 #endif 247 248 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, 249 struct msi_desc *msi_desc) 250 { 251 msi_entry->address = msi_desc->msg.address_lo; 252 msi_entry->data = msi_desc->msg.data; 253 } 254 255 #else /* CONFIG_HYPERV */ 256 static inline void hyperv_init(void) {} 257 static inline void hyperv_setup_mmu_ops(void) {} 258 static inline void *hv_alloc_hyperv_page(void) { return NULL; } 259 static inline void hv_free_hyperv_page(unsigned long addr) {} 260 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 261 static inline void clear_hv_tscchange_cb(void) {} 262 static inline void hyperv_stop_tsc_emulation(void) {}; 263 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 264 { 265 return NULL; 266 } 267 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 268 static inline int hyperv_flush_guest_mapping_range(u64 as, 269 hyperv_fill_flush_list_func fill_func, void *data) 270 { 271 return -1; 272 } 273 #endif /* CONFIG_HYPERV */ 274 275 276 #include <asm-generic/mshyperv.h> 277 278 #endif 279