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 #include <asm/mshyperv.h> 13 14 typedef int (*hyperv_fill_flush_list_func)( 15 struct hv_guest_mapping_flush_list *flush, 16 void *data); 17 18 static inline void hv_set_register(unsigned int reg, u64 value) 19 { 20 wrmsrl(reg, value); 21 } 22 23 static inline u64 hv_get_register(unsigned int reg) 24 { 25 u64 value; 26 27 rdmsrl(reg, value); 28 return value; 29 } 30 31 #define hv_get_raw_timer() rdtsc_ordered() 32 33 void hyperv_vector_handler(struct pt_regs *regs); 34 35 #if IS_ENABLED(CONFIG_HYPERV) 36 extern int hyperv_init_cpuhp; 37 38 extern void *hv_hypercall_pg; 39 extern void __percpu **hyperv_pcpu_input_arg; 40 extern void __percpu **hyperv_pcpu_output_arg; 41 42 extern u64 hv_current_partition_id; 43 44 int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); 45 int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); 46 int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); 47 48 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 49 { 50 u64 input_address = input ? virt_to_phys(input) : 0; 51 u64 output_address = output ? virt_to_phys(output) : 0; 52 u64 hv_status; 53 54 #ifdef CONFIG_X86_64 55 if (!hv_hypercall_pg) 56 return U64_MAX; 57 58 __asm__ __volatile__("mov %4, %%r8\n" 59 CALL_NOSPEC 60 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 61 "+c" (control), "+d" (input_address) 62 : "r" (output_address), 63 THUNK_TARGET(hv_hypercall_pg) 64 : "cc", "memory", "r8", "r9", "r10", "r11"); 65 #else 66 u32 input_address_hi = upper_32_bits(input_address); 67 u32 input_address_lo = lower_32_bits(input_address); 68 u32 output_address_hi = upper_32_bits(output_address); 69 u32 output_address_lo = lower_32_bits(output_address); 70 71 if (!hv_hypercall_pg) 72 return U64_MAX; 73 74 __asm__ __volatile__(CALL_NOSPEC 75 : "=A" (hv_status), 76 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 77 : "A" (control), 78 "b" (input_address_hi), 79 "D"(output_address_hi), "S"(output_address_lo), 80 THUNK_TARGET(hv_hypercall_pg) 81 : "cc", "memory"); 82 #endif /* !x86_64 */ 83 return hv_status; 84 } 85 86 /* Fast hypercall with 8 bytes of input and no output */ 87 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 88 { 89 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 90 91 #ifdef CONFIG_X86_64 92 { 93 __asm__ __volatile__(CALL_NOSPEC 94 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 95 "+c" (control), "+d" (input1) 96 : THUNK_TARGET(hv_hypercall_pg) 97 : "cc", "r8", "r9", "r10", "r11"); 98 } 99 #else 100 { 101 u32 input1_hi = upper_32_bits(input1); 102 u32 input1_lo = lower_32_bits(input1); 103 104 __asm__ __volatile__ (CALL_NOSPEC 105 : "=A"(hv_status), 106 "+c"(input1_lo), 107 ASM_CALL_CONSTRAINT 108 : "A" (control), 109 "b" (input1_hi), 110 THUNK_TARGET(hv_hypercall_pg) 111 : "cc", "edi", "esi"); 112 } 113 #endif 114 return hv_status; 115 } 116 117 /* Fast hypercall with 16 bytes of input */ 118 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 119 { 120 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; 121 122 #ifdef CONFIG_X86_64 123 { 124 __asm__ __volatile__("mov %4, %%r8\n" 125 CALL_NOSPEC 126 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 127 "+c" (control), "+d" (input1) 128 : "r" (input2), 129 THUNK_TARGET(hv_hypercall_pg) 130 : "cc", "r8", "r9", "r10", "r11"); 131 } 132 #else 133 { 134 u32 input1_hi = upper_32_bits(input1); 135 u32 input1_lo = lower_32_bits(input1); 136 u32 input2_hi = upper_32_bits(input2); 137 u32 input2_lo = lower_32_bits(input2); 138 139 __asm__ __volatile__ (CALL_NOSPEC 140 : "=A"(hv_status), 141 "+c"(input1_lo), ASM_CALL_CONSTRAINT 142 : "A" (control), "b" (input1_hi), 143 "D"(input2_hi), "S"(input2_lo), 144 THUNK_TARGET(hv_hypercall_pg) 145 : "cc"); 146 } 147 #endif 148 return hv_status; 149 } 150 151 extern struct hv_vp_assist_page **hv_vp_assist_page; 152 153 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 154 { 155 if (!hv_vp_assist_page) 156 return NULL; 157 158 return hv_vp_assist_page[cpu]; 159 } 160 161 void __init hyperv_init(void); 162 void hyperv_setup_mmu_ops(void); 163 void set_hv_tscchange_cb(void (*cb)(void)); 164 void clear_hv_tscchange_cb(void); 165 void hyperv_stop_tsc_emulation(void); 166 int hyperv_flush_guest_mapping(u64 as); 167 int hyperv_flush_guest_mapping_range(u64 as, 168 hyperv_fill_flush_list_func fill_func, void *data); 169 int hyperv_fill_flush_guest_mapping_list( 170 struct hv_guest_mapping_flush_list *flush, 171 u64 start_gfn, u64 end_gfn); 172 173 extern bool hv_root_partition; 174 175 #ifdef CONFIG_X86_64 176 void hv_apic_init(void); 177 void __init hv_init_spinlocks(void); 178 bool hv_vcpu_is_preempted(int vcpu); 179 #else 180 static inline void hv_apic_init(void) {} 181 #endif 182 183 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, 184 struct msi_desc *msi_desc) 185 { 186 msi_entry->address.as_uint32 = msi_desc->msg.address_lo; 187 msi_entry->data.as_uint32 = msi_desc->msg.data; 188 } 189 190 struct irq_domain *hv_create_pci_msi_domain(void); 191 192 int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, 193 struct hv_interrupt_entry *entry); 194 int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); 195 196 #else /* CONFIG_HYPERV */ 197 static inline void hyperv_init(void) {} 198 static inline void hyperv_setup_mmu_ops(void) {} 199 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 200 static inline void clear_hv_tscchange_cb(void) {} 201 static inline void hyperv_stop_tsc_emulation(void) {}; 202 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 203 { 204 return NULL; 205 } 206 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 207 static inline int hyperv_flush_guest_mapping_range(u64 as, 208 hyperv_fill_flush_list_func fill_func, void *data) 209 { 210 return -1; 211 } 212 #endif /* CONFIG_HYPERV */ 213 214 215 #include <asm-generic/mshyperv.h> 216 217 #endif 218