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 #define hv_init_timer(timer, tick) \ 18 wrmsrl(HV_X64_MSR_STIMER0_COUNT + (2*timer), tick) 19 #define hv_init_timer_config(timer, val) \ 20 wrmsrl(HV_X64_MSR_STIMER0_CONFIG + (2*timer), val) 21 22 #define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val) 23 #define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val) 24 25 #define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val) 26 #define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val) 27 28 #define hv_get_synic_state(val) rdmsrl(HV_X64_MSR_SCONTROL, val) 29 #define hv_set_synic_state(val) wrmsrl(HV_X64_MSR_SCONTROL, val) 30 31 #define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index) 32 33 #define hv_signal_eom() wrmsrl(HV_X64_MSR_EOM, 0) 34 35 #define hv_get_synint_state(int_num, val) \ 36 rdmsrl(HV_X64_MSR_SINT0 + int_num, val) 37 #define hv_set_synint_state(int_num, val) \ 38 wrmsrl(HV_X64_MSR_SINT0 + int_num, val) 39 #define hv_recommend_using_aeoi() \ 40 (!(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED)) 41 42 #define hv_get_crash_ctl(val) \ 43 rdmsrl(HV_X64_MSR_CRASH_CTL, val) 44 45 #define hv_get_time_ref_count(val) \ 46 rdmsrl(HV_X64_MSR_TIME_REF_COUNT, val) 47 48 #define hv_get_reference_tsc(val) \ 49 rdmsrl(HV_X64_MSR_REFERENCE_TSC, val) 50 #define hv_set_reference_tsc(val) \ 51 wrmsrl(HV_X64_MSR_REFERENCE_TSC, val) 52 #define hv_set_clocksource_vdso(val) \ 53 ((val).vdso_clock_mode = VDSO_CLOCKMODE_HVCLOCK) 54 #define hv_enable_vdso_clocksource() \ 55 vclocks_set_used(VDSO_CLOCKMODE_HVCLOCK); 56 #define hv_get_raw_timer() rdtsc_ordered() 57 #define hv_get_vector() HYPERVISOR_CALLBACK_VECTOR 58 59 /* 60 * Reference to pv_ops must be inline so objtool 61 * detection of noinstr violations can work correctly. 62 */ 63 static __always_inline void hv_setup_sched_clock(void *sched_clock) 64 { 65 #ifdef CONFIG_PARAVIRT 66 pv_ops.time.sched_clock = sched_clock; 67 #endif 68 } 69 70 void hyperv_vector_handler(struct pt_regs *regs); 71 72 static inline void hv_enable_stimer0_percpu_irq(int irq) {} 73 static inline void hv_disable_stimer0_percpu_irq(int irq) {} 74 75 76 #if IS_ENABLED(CONFIG_HYPERV) 77 extern void *hv_hypercall_pg; 78 extern void __percpu **hyperv_pcpu_input_arg; 79 80 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 81 { 82 u64 input_address = input ? virt_to_phys(input) : 0; 83 u64 output_address = output ? virt_to_phys(output) : 0; 84 u64 hv_status; 85 86 #ifdef CONFIG_X86_64 87 if (!hv_hypercall_pg) 88 return U64_MAX; 89 90 __asm__ __volatile__("mov %4, %%r8\n" 91 CALL_NOSPEC 92 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 93 "+c" (control), "+d" (input_address) 94 : "r" (output_address), 95 THUNK_TARGET(hv_hypercall_pg) 96 : "cc", "memory", "r8", "r9", "r10", "r11"); 97 #else 98 u32 input_address_hi = upper_32_bits(input_address); 99 u32 input_address_lo = lower_32_bits(input_address); 100 u32 output_address_hi = upper_32_bits(output_address); 101 u32 output_address_lo = lower_32_bits(output_address); 102 103 if (!hv_hypercall_pg) 104 return U64_MAX; 105 106 __asm__ __volatile__(CALL_NOSPEC 107 : "=A" (hv_status), 108 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 109 : "A" (control), 110 "b" (input_address_hi), 111 "D"(output_address_hi), "S"(output_address_lo), 112 THUNK_TARGET(hv_hypercall_pg) 113 : "cc", "memory"); 114 #endif /* !x86_64 */ 115 return hv_status; 116 } 117 118 /* Fast hypercall with 8 bytes of input and no output */ 119 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 120 { 121 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 122 123 #ifdef CONFIG_X86_64 124 { 125 __asm__ __volatile__(CALL_NOSPEC 126 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 127 "+c" (control), "+d" (input1) 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); 135 136 __asm__ __volatile__ (CALL_NOSPEC 137 : "=A"(hv_status), 138 "+c"(input1_lo), 139 ASM_CALL_CONSTRAINT 140 : "A" (control), 141 "b" (input1_hi), 142 THUNK_TARGET(hv_hypercall_pg) 143 : "cc", "edi", "esi"); 144 } 145 #endif 146 return hv_status; 147 } 148 149 /* Fast hypercall with 16 bytes of input */ 150 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 151 { 152 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 153 154 #ifdef CONFIG_X86_64 155 { 156 __asm__ __volatile__("mov %4, %%r8\n" 157 CALL_NOSPEC 158 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 159 "+c" (control), "+d" (input1) 160 : "r" (input2), 161 THUNK_TARGET(hv_hypercall_pg) 162 : "cc", "r8", "r9", "r10", "r11"); 163 } 164 #else 165 { 166 u32 input1_hi = upper_32_bits(input1); 167 u32 input1_lo = lower_32_bits(input1); 168 u32 input2_hi = upper_32_bits(input2); 169 u32 input2_lo = lower_32_bits(input2); 170 171 __asm__ __volatile__ (CALL_NOSPEC 172 : "=A"(hv_status), 173 "+c"(input1_lo), ASM_CALL_CONSTRAINT 174 : "A" (control), "b" (input1_hi), 175 "D"(input2_hi), "S"(input2_lo), 176 THUNK_TARGET(hv_hypercall_pg) 177 : "cc"); 178 } 179 #endif 180 return hv_status; 181 } 182 183 /* 184 * Rep hypercalls. Callers of this functions are supposed to ensure that 185 * rep_count and varhead_size comply with Hyper-V hypercall definition. 186 */ 187 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, 188 void *input, void *output) 189 { 190 u64 control = code; 191 u64 status; 192 u16 rep_comp; 193 194 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; 195 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; 196 197 do { 198 status = hv_do_hypercall(control, input, output); 199 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) 200 return status; 201 202 /* Bits 32-43 of status have 'Reps completed' data. */ 203 rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >> 204 HV_HYPERCALL_REP_COMP_OFFSET; 205 206 control &= ~HV_HYPERCALL_REP_START_MASK; 207 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; 208 209 touch_nmi_watchdog(); 210 } while (rep_comp < rep_count); 211 212 return status; 213 } 214 215 extern struct hv_vp_assist_page **hv_vp_assist_page; 216 217 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 218 { 219 if (!hv_vp_assist_page) 220 return NULL; 221 222 return hv_vp_assist_page[cpu]; 223 } 224 225 void __init hyperv_init(void); 226 void hyperv_setup_mmu_ops(void); 227 void *hv_alloc_hyperv_page(void); 228 void *hv_alloc_hyperv_zeroed_page(void); 229 void hv_free_hyperv_page(unsigned long addr); 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