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
hv_set_register(unsigned int reg,u64 value)18 static inline void hv_set_register(unsigned int reg, u64 value)
19 {
20 wrmsrl(reg, value);
21 }
22
hv_get_register(unsigned int reg)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
hv_do_hypercall(u64 control,void * input,void * output)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 */
hv_do_fast_hypercall8(u16 code,u64 input1)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 */
hv_do_fast_hypercall16(u16 code,u64 input1,u64 input2)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
hv_get_vp_assist_page(unsigned int cpu)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
hv_apic_init(void)176 static inline void hv_apic_init(void) {}
177 #endif
178
hv_set_msi_entry_from_desc(union hv_msi_entry * msi_entry,struct msi_desc * msi_desc)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 */
hyperv_init(void)193 static inline void hyperv_init(void) {}
hyperv_setup_mmu_ops(void)194 static inline void hyperv_setup_mmu_ops(void) {}
set_hv_tscchange_cb(void (* cb)(void))195 static inline void set_hv_tscchange_cb(void (*cb)(void)) {}
clear_hv_tscchange_cb(void)196 static inline void clear_hv_tscchange_cb(void) {}
hyperv_stop_tsc_emulation(void)197 static inline void hyperv_stop_tsc_emulation(void) {};
hv_get_vp_assist_page(unsigned int cpu)198 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
199 {
200 return NULL;
201 }
hyperv_flush_guest_mapping(u64 as)202 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; }
hyperv_flush_guest_mapping_range(u64 as,hyperv_fill_flush_list_func fill_func,void * data)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
