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 int hyperv_init_cpuhp; 78 79 extern void *hv_hypercall_pg; 80 extern void __percpu **hyperv_pcpu_input_arg; 81 82 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 83 { 84 u64 input_address = input ? virt_to_phys(input) : 0; 85 u64 output_address = output ? virt_to_phys(output) : 0; 86 u64 hv_status; 87 88 #ifdef CONFIG_X86_64 89 if (!hv_hypercall_pg) 90 return U64_MAX; 91 92 __asm__ __volatile__("mov %4, %%r8\n" 93 CALL_NOSPEC 94 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 95 "+c" (control), "+d" (input_address) 96 : "r" (output_address), 97 THUNK_TARGET(hv_hypercall_pg) 98 : "cc", "memory", "r8", "r9", "r10", "r11"); 99 #else 100 u32 input_address_hi = upper_32_bits(input_address); 101 u32 input_address_lo = lower_32_bits(input_address); 102 u32 output_address_hi = upper_32_bits(output_address); 103 u32 output_address_lo = lower_32_bits(output_address); 104 105 if (!hv_hypercall_pg) 106 return U64_MAX; 107 108 __asm__ __volatile__(CALL_NOSPEC 109 : "=A" (hv_status), 110 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 111 : "A" (control), 112 "b" (input_address_hi), 113 "D"(output_address_hi), "S"(output_address_lo), 114 THUNK_TARGET(hv_hypercall_pg) 115 : "cc", "memory"); 116 #endif /* !x86_64 */ 117 return hv_status; 118 } 119 120 /* Fast hypercall with 8 bytes of input and no output */ 121 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 122 { 123 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 124 125 #ifdef CONFIG_X86_64 126 { 127 __asm__ __volatile__(CALL_NOSPEC 128 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 129 "+c" (control), "+d" (input1) 130 : THUNK_TARGET(hv_hypercall_pg) 131 : "cc", "r8", "r9", "r10", "r11"); 132 } 133 #else 134 { 135 u32 input1_hi = upper_32_bits(input1); 136 u32 input1_lo = lower_32_bits(input1); 137 138 __asm__ __volatile__ (CALL_NOSPEC 139 : "=A"(hv_status), 140 "+c"(input1_lo), 141 ASM_CALL_CONSTRAINT 142 : "A" (control), 143 "b" (input1_hi), 144 THUNK_TARGET(hv_hypercall_pg) 145 : "cc", "edi", "esi"); 146 } 147 #endif 148 return hv_status; 149 } 150 151 /* Fast hypercall with 16 bytes of input */ 152 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 153 { 154 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 155 156 #ifdef CONFIG_X86_64 157 { 158 __asm__ __volatile__("mov %4, %%r8\n" 159 CALL_NOSPEC 160 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 161 "+c" (control), "+d" (input1) 162 : "r" (input2), 163 THUNK_TARGET(hv_hypercall_pg) 164 : "cc", "r8", "r9", "r10", "r11"); 165 } 166 #else 167 { 168 u32 input1_hi = upper_32_bits(input1); 169 u32 input1_lo = lower_32_bits(input1); 170 u32 input2_hi = upper_32_bits(input2); 171 u32 input2_lo = lower_32_bits(input2); 172 173 __asm__ __volatile__ (CALL_NOSPEC 174 : "=A"(hv_status), 175 "+c"(input1_lo), ASM_CALL_CONSTRAINT 176 : "A" (control), "b" (input1_hi), 177 "D"(input2_hi), "S"(input2_lo), 178 THUNK_TARGET(hv_hypercall_pg) 179 : "cc"); 180 } 181 #endif 182 return hv_status; 183 } 184 185 /* 186 * Rep hypercalls. Callers of this functions are supposed to ensure that 187 * rep_count and varhead_size comply with Hyper-V hypercall definition. 188 */ 189 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, 190 void *input, void *output) 191 { 192 u64 control = code; 193 u64 status; 194 u16 rep_comp; 195 196 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; 197 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; 198 199 do { 200 status = hv_do_hypercall(control, input, output); 201 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) 202 return status; 203 204 /* Bits 32-43 of status have 'Reps completed' data. */ 205 rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >> 206 HV_HYPERCALL_REP_COMP_OFFSET; 207 208 control &= ~HV_HYPERCALL_REP_START_MASK; 209 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; 210 211 touch_nmi_watchdog(); 212 } while (rep_comp < rep_count); 213 214 return status; 215 } 216 217 extern struct hv_vp_assist_page **hv_vp_assist_page; 218 219 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 220 { 221 if (!hv_vp_assist_page) 222 return NULL; 223 224 return hv_vp_assist_page[cpu]; 225 } 226 227 void __init hyperv_init(void); 228 void hyperv_setup_mmu_ops(void); 229 void *hv_alloc_hyperv_page(void); 230 void *hv_alloc_hyperv_zeroed_page(void); 231 void hv_free_hyperv_page(unsigned long addr); 232 void set_hv_tscchange_cb(void (*cb)(void)); 233 void clear_hv_tscchange_cb(void); 234 void hyperv_stop_tsc_emulation(void); 235 int hyperv_flush_guest_mapping(u64 as); 236 int hyperv_flush_guest_mapping_range(u64 as, 237 hyperv_fill_flush_list_func fill_func, void *data); 238 int hyperv_fill_flush_guest_mapping_list( 239 struct hv_guest_mapping_flush_list *flush, 240 u64 start_gfn, u64 end_gfn); 241 242 #ifdef CONFIG_X86_64 243 void hv_apic_init(void); 244 void __init hv_init_spinlocks(void); 245 bool hv_vcpu_is_preempted(int vcpu); 246 #else 247 static inline void hv_apic_init(void) {} 248 #endif 249 250 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, 251 struct msi_desc *msi_desc) 252 { 253 msi_entry->address = msi_desc->msg.address_lo; 254 msi_entry->data = msi_desc->msg.data; 255 } 256 257 #else /* CONFIG_HYPERV */ 258 static inline void hyperv_init(void) {} 259 static inline void hyperv_setup_mmu_ops(void) {} 260 static inline void *hv_alloc_hyperv_page(void) { return NULL; } 261 static inline void hv_free_hyperv_page(unsigned long addr) {} 262 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 263 static inline void clear_hv_tscchange_cb(void) {} 264 static inline void hyperv_stop_tsc_emulation(void) {}; 265 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 266 { 267 return NULL; 268 } 269 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 270 static inline int hyperv_flush_guest_mapping_range(u64 as, 271 hyperv_fill_flush_list_func fill_func, void *data) 272 { 273 return -1; 274 } 275 #endif /* CONFIG_HYPERV */ 276 277 278 #include <asm-generic/mshyperv.h> 279 280 #endif 281