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 int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); 86 int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); 87 int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); 88 89 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 90 { 91 u64 input_address = input ? virt_to_phys(input) : 0; 92 u64 output_address = output ? virt_to_phys(output) : 0; 93 u64 hv_status; 94 95 #ifdef CONFIG_X86_64 96 if (!hv_hypercall_pg) 97 return U64_MAX; 98 99 __asm__ __volatile__("mov %4, %%r8\n" 100 CALL_NOSPEC 101 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 102 "+c" (control), "+d" (input_address) 103 : "r" (output_address), 104 THUNK_TARGET(hv_hypercall_pg) 105 : "cc", "memory", "r8", "r9", "r10", "r11"); 106 #else 107 u32 input_address_hi = upper_32_bits(input_address); 108 u32 input_address_lo = lower_32_bits(input_address); 109 u32 output_address_hi = upper_32_bits(output_address); 110 u32 output_address_lo = lower_32_bits(output_address); 111 112 if (!hv_hypercall_pg) 113 return U64_MAX; 114 115 __asm__ __volatile__(CALL_NOSPEC 116 : "=A" (hv_status), 117 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 118 : "A" (control), 119 "b" (input_address_hi), 120 "D"(output_address_hi), "S"(output_address_lo), 121 THUNK_TARGET(hv_hypercall_pg) 122 : "cc", "memory"); 123 #endif /* !x86_64 */ 124 return hv_status; 125 } 126 127 /* Fast hypercall with 8 bytes of input and no output */ 128 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 129 { 130 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 131 132 #ifdef CONFIG_X86_64 133 { 134 __asm__ __volatile__(CALL_NOSPEC 135 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 136 "+c" (control), "+d" (input1) 137 : THUNK_TARGET(hv_hypercall_pg) 138 : "cc", "r8", "r9", "r10", "r11"); 139 } 140 #else 141 { 142 u32 input1_hi = upper_32_bits(input1); 143 u32 input1_lo = lower_32_bits(input1); 144 145 __asm__ __volatile__ (CALL_NOSPEC 146 : "=A"(hv_status), 147 "+c"(input1_lo), 148 ASM_CALL_CONSTRAINT 149 : "A" (control), 150 "b" (input1_hi), 151 THUNK_TARGET(hv_hypercall_pg) 152 : "cc", "edi", "esi"); 153 } 154 #endif 155 return hv_status; 156 } 157 158 /* Fast hypercall with 16 bytes of input */ 159 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 160 { 161 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 162 163 #ifdef CONFIG_X86_64 164 { 165 __asm__ __volatile__("mov %4, %%r8\n" 166 CALL_NOSPEC 167 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 168 "+c" (control), "+d" (input1) 169 : "r" (input2), 170 THUNK_TARGET(hv_hypercall_pg) 171 : "cc", "r8", "r9", "r10", "r11"); 172 } 173 #else 174 { 175 u32 input1_hi = upper_32_bits(input1); 176 u32 input1_lo = lower_32_bits(input1); 177 u32 input2_hi = upper_32_bits(input2); 178 u32 input2_lo = lower_32_bits(input2); 179 180 __asm__ __volatile__ (CALL_NOSPEC 181 : "=A"(hv_status), 182 "+c"(input1_lo), ASM_CALL_CONSTRAINT 183 : "A" (control), "b" (input1_hi), 184 "D"(input2_hi), "S"(input2_lo), 185 THUNK_TARGET(hv_hypercall_pg) 186 : "cc"); 187 } 188 #endif 189 return hv_status; 190 } 191 192 /* 193 * Rep hypercalls. Callers of this functions are supposed to ensure that 194 * rep_count and varhead_size comply with Hyper-V hypercall definition. 195 */ 196 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, 197 void *input, void *output) 198 { 199 u64 control = code; 200 u64 status; 201 u16 rep_comp; 202 203 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; 204 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; 205 206 do { 207 status = hv_do_hypercall(control, input, output); 208 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) 209 return status; 210 211 /* Bits 32-43 of status have 'Reps completed' data. */ 212 rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >> 213 HV_HYPERCALL_REP_COMP_OFFSET; 214 215 control &= ~HV_HYPERCALL_REP_START_MASK; 216 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; 217 218 touch_nmi_watchdog(); 219 } while (rep_comp < rep_count); 220 221 return status; 222 } 223 224 extern struct hv_vp_assist_page **hv_vp_assist_page; 225 226 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 227 { 228 if (!hv_vp_assist_page) 229 return NULL; 230 231 return hv_vp_assist_page[cpu]; 232 } 233 234 void __init hyperv_init(void); 235 void hyperv_setup_mmu_ops(void); 236 void *hv_alloc_hyperv_page(void); 237 void *hv_alloc_hyperv_zeroed_page(void); 238 void hv_free_hyperv_page(unsigned long addr); 239 void set_hv_tscchange_cb(void (*cb)(void)); 240 void clear_hv_tscchange_cb(void); 241 void hyperv_stop_tsc_emulation(void); 242 int hyperv_flush_guest_mapping(u64 as); 243 int hyperv_flush_guest_mapping_range(u64 as, 244 hyperv_fill_flush_list_func fill_func, void *data); 245 int hyperv_fill_flush_guest_mapping_list( 246 struct hv_guest_mapping_flush_list *flush, 247 u64 start_gfn, u64 end_gfn); 248 249 extern bool hv_root_partition; 250 251 #ifdef CONFIG_X86_64 252 void hv_apic_init(void); 253 void __init hv_init_spinlocks(void); 254 bool hv_vcpu_is_preempted(int vcpu); 255 #else 256 static inline void hv_apic_init(void) {} 257 #endif 258 259 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, 260 struct msi_desc *msi_desc) 261 { 262 msi_entry->address.as_uint32 = msi_desc->msg.address_lo; 263 msi_entry->data.as_uint32 = msi_desc->msg.data; 264 } 265 266 struct irq_domain *hv_create_pci_msi_domain(void); 267 268 int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, 269 struct hv_interrupt_entry *entry); 270 int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); 271 272 #else /* CONFIG_HYPERV */ 273 static inline void hyperv_init(void) {} 274 static inline void hyperv_setup_mmu_ops(void) {} 275 static inline void *hv_alloc_hyperv_page(void) { return NULL; } 276 static inline void hv_free_hyperv_page(unsigned long addr) {} 277 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 278 static inline void clear_hv_tscchange_cb(void) {} 279 static inline void hyperv_stop_tsc_emulation(void) {}; 280 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 281 { 282 return NULL; 283 } 284 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 285 static inline int hyperv_flush_guest_mapping_range(u64 as, 286 hyperv_fill_flush_list_func fill_func, void *data) 287 { 288 return -1; 289 } 290 #endif /* CONFIG_HYPERV */ 291 292 293 #include <asm-generic/mshyperv.h> 294 295 #endif 296