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 <asm/io.h> 8 #include <asm/hyperv-tlfs.h> 9 #include <asm/nospec-branch.h> 10 11 typedef int (*hyperv_fill_flush_list_func)( 12 struct hv_guest_mapping_flush_list *flush, 13 void *data); 14 15 #define hv_init_timer(timer, tick) \ 16 wrmsrl(HV_X64_MSR_STIMER0_COUNT + (2*timer), tick) 17 #define hv_init_timer_config(timer, val) \ 18 wrmsrl(HV_X64_MSR_STIMER0_CONFIG + (2*timer), val) 19 20 #define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val) 21 #define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val) 22 23 #define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val) 24 #define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val) 25 26 #define hv_get_synic_state(val) rdmsrl(HV_X64_MSR_SCONTROL, val) 27 #define hv_set_synic_state(val) wrmsrl(HV_X64_MSR_SCONTROL, val) 28 29 #define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index) 30 31 #define hv_signal_eom() wrmsrl(HV_X64_MSR_EOM, 0) 32 33 #define hv_get_synint_state(int_num, val) \ 34 rdmsrl(HV_X64_MSR_SINT0 + int_num, val) 35 #define hv_set_synint_state(int_num, val) \ 36 wrmsrl(HV_X64_MSR_SINT0 + int_num, val) 37 38 #define hv_get_crash_ctl(val) \ 39 rdmsrl(HV_X64_MSR_CRASH_CTL, val) 40 41 #define hv_get_time_ref_count(val) \ 42 rdmsrl(HV_X64_MSR_TIME_REF_COUNT, val) 43 44 #define hv_get_reference_tsc(val) \ 45 rdmsrl(HV_X64_MSR_REFERENCE_TSC, val) 46 #define hv_set_reference_tsc(val) \ 47 wrmsrl(HV_X64_MSR_REFERENCE_TSC, val) 48 #define hv_set_clocksource_vdso(val) \ 49 ((val).archdata.vclock_mode = VCLOCK_HVCLOCK) 50 #define hv_get_raw_timer() rdtsc_ordered() 51 52 void hyperv_callback_vector(void); 53 void hyperv_reenlightenment_vector(void); 54 #ifdef CONFIG_TRACING 55 #define trace_hyperv_callback_vector hyperv_callback_vector 56 #endif 57 void hyperv_vector_handler(struct pt_regs *regs); 58 59 /* 60 * Routines for stimer0 Direct Mode handling. 61 * On x86/x64, there are no percpu actions to take. 62 */ 63 void hv_stimer0_vector_handler(struct pt_regs *regs); 64 void hv_stimer0_callback_vector(void); 65 66 static inline void hv_enable_stimer0_percpu_irq(int irq) {} 67 static inline void hv_disable_stimer0_percpu_irq(int irq) {} 68 69 70 #if IS_ENABLED(CONFIG_HYPERV) 71 extern void *hv_hypercall_pg; 72 extern void __percpu **hyperv_pcpu_input_arg; 73 74 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 75 { 76 u64 input_address = input ? virt_to_phys(input) : 0; 77 u64 output_address = output ? virt_to_phys(output) : 0; 78 u64 hv_status; 79 80 #ifdef CONFIG_X86_64 81 if (!hv_hypercall_pg) 82 return U64_MAX; 83 84 __asm__ __volatile__("mov %4, %%r8\n" 85 CALL_NOSPEC 86 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 87 "+c" (control), "+d" (input_address) 88 : "r" (output_address), 89 THUNK_TARGET(hv_hypercall_pg) 90 : "cc", "memory", "r8", "r9", "r10", "r11"); 91 #else 92 u32 input_address_hi = upper_32_bits(input_address); 93 u32 input_address_lo = lower_32_bits(input_address); 94 u32 output_address_hi = upper_32_bits(output_address); 95 u32 output_address_lo = lower_32_bits(output_address); 96 97 if (!hv_hypercall_pg) 98 return U64_MAX; 99 100 __asm__ __volatile__(CALL_NOSPEC 101 : "=A" (hv_status), 102 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 103 : "A" (control), 104 "b" (input_address_hi), 105 "D"(output_address_hi), "S"(output_address_lo), 106 THUNK_TARGET(hv_hypercall_pg) 107 : "cc", "memory"); 108 #endif /* !x86_64 */ 109 return hv_status; 110 } 111 112 /* Fast hypercall with 8 bytes of input and no output */ 113 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 114 { 115 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 116 117 #ifdef CONFIG_X86_64 118 { 119 __asm__ __volatile__(CALL_NOSPEC 120 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 121 "+c" (control), "+d" (input1) 122 : THUNK_TARGET(hv_hypercall_pg) 123 : "cc", "r8", "r9", "r10", "r11"); 124 } 125 #else 126 { 127 u32 input1_hi = upper_32_bits(input1); 128 u32 input1_lo = lower_32_bits(input1); 129 130 __asm__ __volatile__ (CALL_NOSPEC 131 : "=A"(hv_status), 132 "+c"(input1_lo), 133 ASM_CALL_CONSTRAINT 134 : "A" (control), 135 "b" (input1_hi), 136 THUNK_TARGET(hv_hypercall_pg) 137 : "cc", "edi", "esi"); 138 } 139 #endif 140 return hv_status; 141 } 142 143 /* Fast hypercall with 16 bytes of input */ 144 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 145 { 146 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 147 148 #ifdef CONFIG_X86_64 149 { 150 __asm__ __volatile__("mov %4, %%r8\n" 151 CALL_NOSPEC 152 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 153 "+c" (control), "+d" (input1) 154 : "r" (input2), 155 THUNK_TARGET(hv_hypercall_pg) 156 : "cc", "r8", "r9", "r10", "r11"); 157 } 158 #else 159 { 160 u32 input1_hi = upper_32_bits(input1); 161 u32 input1_lo = lower_32_bits(input1); 162 u32 input2_hi = upper_32_bits(input2); 163 u32 input2_lo = lower_32_bits(input2); 164 165 __asm__ __volatile__ (CALL_NOSPEC 166 : "=A"(hv_status), 167 "+c"(input1_lo), ASM_CALL_CONSTRAINT 168 : "A" (control), "b" (input1_hi), 169 "D"(input2_hi), "S"(input2_lo), 170 THUNK_TARGET(hv_hypercall_pg) 171 : "cc"); 172 } 173 #endif 174 return hv_status; 175 } 176 177 /* 178 * Rep hypercalls. Callers of this functions are supposed to ensure that 179 * rep_count and varhead_size comply with Hyper-V hypercall definition. 180 */ 181 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, 182 void *input, void *output) 183 { 184 u64 control = code; 185 u64 status; 186 u16 rep_comp; 187 188 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; 189 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; 190 191 do { 192 status = hv_do_hypercall(control, input, output); 193 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) 194 return status; 195 196 /* Bits 32-43 of status have 'Reps completed' data. */ 197 rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >> 198 HV_HYPERCALL_REP_COMP_OFFSET; 199 200 control &= ~HV_HYPERCALL_REP_START_MASK; 201 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; 202 203 touch_nmi_watchdog(); 204 } while (rep_comp < rep_count); 205 206 return status; 207 } 208 209 extern struct hv_vp_assist_page **hv_vp_assist_page; 210 211 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 212 { 213 if (!hv_vp_assist_page) 214 return NULL; 215 216 return hv_vp_assist_page[cpu]; 217 } 218 219 void __init hyperv_init(void); 220 void hyperv_setup_mmu_ops(void); 221 void *hv_alloc_hyperv_page(void); 222 void *hv_alloc_hyperv_zeroed_page(void); 223 void hv_free_hyperv_page(unsigned long addr); 224 void hyperv_reenlightenment_intr(struct pt_regs *regs); 225 void set_hv_tscchange_cb(void (*cb)(void)); 226 void clear_hv_tscchange_cb(void); 227 void hyperv_stop_tsc_emulation(void); 228 int hyperv_flush_guest_mapping(u64 as); 229 int hyperv_flush_guest_mapping_range(u64 as, 230 hyperv_fill_flush_list_func fill_func, void *data); 231 int hyperv_fill_flush_guest_mapping_list( 232 struct hv_guest_mapping_flush_list *flush, 233 u64 start_gfn, u64 end_gfn); 234 235 #ifdef CONFIG_X86_64 236 void hv_apic_init(void); 237 void __init hv_init_spinlocks(void); 238 bool hv_vcpu_is_preempted(int vcpu); 239 #else 240 static inline void hv_apic_init(void) {} 241 #endif 242 243 #else /* CONFIG_HYPERV */ 244 static inline void hyperv_init(void) {} 245 static inline void hyperv_setup_mmu_ops(void) {} 246 static inline void *hv_alloc_hyperv_page(void) { return NULL; } 247 static inline void hv_free_hyperv_page(unsigned long addr) {} 248 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 249 static inline void clear_hv_tscchange_cb(void) {} 250 static inline void hyperv_stop_tsc_emulation(void) {}; 251 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 252 { 253 return NULL; 254 } 255 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 256 static inline int hyperv_flush_guest_mapping_range(u64 as, 257 hyperv_fill_flush_list_func fill_func, void *data) 258 { 259 return -1; 260 } 261 #endif /* CONFIG_HYPERV */ 262 263 264 #include <asm-generic/mshyperv.h> 265 266 #endif 267