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