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 extern void __percpu **hyperv_pcpu_output_arg; 82 83 extern u64 hv_current_partition_id; 84 85 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 86 { 87 u64 input_address = input ? virt_to_phys(input) : 0; 88 u64 output_address = output ? virt_to_phys(output) : 0; 89 u64 hv_status; 90 91 #ifdef CONFIG_X86_64 92 if (!hv_hypercall_pg) 93 return U64_MAX; 94 95 __asm__ __volatile__("mov %4, %%r8\n" 96 CALL_NOSPEC 97 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 98 "+c" (control), "+d" (input_address) 99 : "r" (output_address), 100 THUNK_TARGET(hv_hypercall_pg) 101 : "cc", "memory", "r8", "r9", "r10", "r11"); 102 #else 103 u32 input_address_hi = upper_32_bits(input_address); 104 u32 input_address_lo = lower_32_bits(input_address); 105 u32 output_address_hi = upper_32_bits(output_address); 106 u32 output_address_lo = lower_32_bits(output_address); 107 108 if (!hv_hypercall_pg) 109 return U64_MAX; 110 111 __asm__ __volatile__(CALL_NOSPEC 112 : "=A" (hv_status), 113 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 114 : "A" (control), 115 "b" (input_address_hi), 116 "D"(output_address_hi), "S"(output_address_lo), 117 THUNK_TARGET(hv_hypercall_pg) 118 : "cc", "memory"); 119 #endif /* !x86_64 */ 120 return hv_status; 121 } 122 123 /* Fast hypercall with 8 bytes of input and no output */ 124 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 125 { 126 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 127 128 #ifdef CONFIG_X86_64 129 { 130 __asm__ __volatile__(CALL_NOSPEC 131 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 132 "+c" (control), "+d" (input1) 133 : THUNK_TARGET(hv_hypercall_pg) 134 : "cc", "r8", "r9", "r10", "r11"); 135 } 136 #else 137 { 138 u32 input1_hi = upper_32_bits(input1); 139 u32 input1_lo = lower_32_bits(input1); 140 141 __asm__ __volatile__ (CALL_NOSPEC 142 : "=A"(hv_status), 143 "+c"(input1_lo), 144 ASM_CALL_CONSTRAINT 145 : "A" (control), 146 "b" (input1_hi), 147 THUNK_TARGET(hv_hypercall_pg) 148 : "cc", "edi", "esi"); 149 } 150 #endif 151 return hv_status; 152 } 153 154 /* Fast hypercall with 16 bytes of input */ 155 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 156 { 157 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 158 159 #ifdef CONFIG_X86_64 160 { 161 __asm__ __volatile__("mov %4, %%r8\n" 162 CALL_NOSPEC 163 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 164 "+c" (control), "+d" (input1) 165 : "r" (input2), 166 THUNK_TARGET(hv_hypercall_pg) 167 : "cc", "r8", "r9", "r10", "r11"); 168 } 169 #else 170 { 171 u32 input1_hi = upper_32_bits(input1); 172 u32 input1_lo = lower_32_bits(input1); 173 u32 input2_hi = upper_32_bits(input2); 174 u32 input2_lo = lower_32_bits(input2); 175 176 __asm__ __volatile__ (CALL_NOSPEC 177 : "=A"(hv_status), 178 "+c"(input1_lo), ASM_CALL_CONSTRAINT 179 : "A" (control), "b" (input1_hi), 180 "D"(input2_hi), "S"(input2_lo), 181 THUNK_TARGET(hv_hypercall_pg) 182 : "cc"); 183 } 184 #endif 185 return hv_status; 186 } 187 188 /* 189 * Rep hypercalls. Callers of this functions are supposed to ensure that 190 * rep_count and varhead_size comply with Hyper-V hypercall definition. 191 */ 192 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, 193 void *input, void *output) 194 { 195 u64 control = code; 196 u64 status; 197 u16 rep_comp; 198 199 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; 200 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; 201 202 do { 203 status = hv_do_hypercall(control, input, output); 204 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) 205 return status; 206 207 /* Bits 32-43 of status have 'Reps completed' data. */ 208 rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >> 209 HV_HYPERCALL_REP_COMP_OFFSET; 210 211 control &= ~HV_HYPERCALL_REP_START_MASK; 212 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; 213 214 touch_nmi_watchdog(); 215 } while (rep_comp < rep_count); 216 217 return status; 218 } 219 220 extern struct hv_vp_assist_page **hv_vp_assist_page; 221 222 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 223 { 224 if (!hv_vp_assist_page) 225 return NULL; 226 227 return hv_vp_assist_page[cpu]; 228 } 229 230 void __init hyperv_init(void); 231 void hyperv_setup_mmu_ops(void); 232 void *hv_alloc_hyperv_page(void); 233 void *hv_alloc_hyperv_zeroed_page(void); 234 void hv_free_hyperv_page(unsigned long addr); 235 void set_hv_tscchange_cb(void (*cb)(void)); 236 void clear_hv_tscchange_cb(void); 237 void hyperv_stop_tsc_emulation(void); 238 int hyperv_flush_guest_mapping(u64 as); 239 int hyperv_flush_guest_mapping_range(u64 as, 240 hyperv_fill_flush_list_func fill_func, void *data); 241 int hyperv_fill_flush_guest_mapping_list( 242 struct hv_guest_mapping_flush_list *flush, 243 u64 start_gfn, u64 end_gfn); 244 245 extern bool hv_root_partition; 246 247 #ifdef CONFIG_X86_64 248 void hv_apic_init(void); 249 void __init hv_init_spinlocks(void); 250 bool hv_vcpu_is_preempted(int vcpu); 251 #else 252 static inline void hv_apic_init(void) {} 253 #endif 254 255 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, 256 struct msi_desc *msi_desc) 257 { 258 msi_entry->address = msi_desc->msg.address_lo; 259 msi_entry->data = msi_desc->msg.data; 260 } 261 262 #else /* CONFIG_HYPERV */ 263 static inline void hyperv_init(void) {} 264 static inline void hyperv_setup_mmu_ops(void) {} 265 static inline void *hv_alloc_hyperv_page(void) { return NULL; } 266 static inline void hv_free_hyperv_page(unsigned long addr) {} 267 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 268 static inline void clear_hv_tscchange_cb(void) {} 269 static inline void hyperv_stop_tsc_emulation(void) {}; 270 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 271 { 272 return NULL; 273 } 274 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 275 static inline int hyperv_flush_guest_mapping_range(u64 as, 276 hyperv_fill_flush_list_func fill_func, void *data) 277 { 278 return -1; 279 } 280 #endif /* CONFIG_HYPERV */ 281 282 283 #include <asm-generic/mshyperv.h> 284 285 #endif 286