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 union hv_ghcb;
15
16 DECLARE_STATIC_KEY_FALSE(isolation_type_snp);
17
18 typedef int (*hyperv_fill_flush_list_func)(
19 struct hv_guest_mapping_flush_list *flush,
20 void *data);
21
22 void hyperv_vector_handler(struct pt_regs *regs);
23
24 #if IS_ENABLED(CONFIG_HYPERV)
25 extern int hyperv_init_cpuhp;
26
27 extern void *hv_hypercall_pg;
28
29 extern u64 hv_current_partition_id;
30
31 extern union hv_ghcb * __percpu *hv_ghcb_pg;
32
33 int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages);
34 int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id);
35 int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags);
36
hv_do_hypercall(u64 control,void * input,void * output)37 static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
38 {
39 u64 input_address = input ? virt_to_phys(input) : 0;
40 u64 output_address = output ? virt_to_phys(output) : 0;
41 u64 hv_status;
42
43 #ifdef CONFIG_X86_64
44 if (!hv_hypercall_pg)
45 return U64_MAX;
46
47 __asm__ __volatile__("mov %4, %%r8\n"
48 CALL_NOSPEC
49 : "=a" (hv_status), ASM_CALL_CONSTRAINT,
50 "+c" (control), "+d" (input_address)
51 : "r" (output_address),
52 THUNK_TARGET(hv_hypercall_pg)
53 : "cc", "memory", "r8", "r9", "r10", "r11");
54 #else
55 u32 input_address_hi = upper_32_bits(input_address);
56 u32 input_address_lo = lower_32_bits(input_address);
57 u32 output_address_hi = upper_32_bits(output_address);
58 u32 output_address_lo = lower_32_bits(output_address);
59
60 if (!hv_hypercall_pg)
61 return U64_MAX;
62
63 __asm__ __volatile__(CALL_NOSPEC
64 : "=A" (hv_status),
65 "+c" (input_address_lo), ASM_CALL_CONSTRAINT
66 : "A" (control),
67 "b" (input_address_hi),
68 "D"(output_address_hi), "S"(output_address_lo),
69 THUNK_TARGET(hv_hypercall_pg)
70 : "cc", "memory");
71 #endif /* !x86_64 */
72 return hv_status;
73 }
74
75 /* Hypercall to the L0 hypervisor */
hv_do_nested_hypercall(u64 control,void * input,void * output)76 static inline u64 hv_do_nested_hypercall(u64 control, void *input, void *output)
77 {
78 return hv_do_hypercall(control | HV_HYPERCALL_NESTED, input, output);
79 }
80
81 /* Fast hypercall with 8 bytes of input and no output */
_hv_do_fast_hypercall8(u64 control,u64 input1)82 static inline u64 _hv_do_fast_hypercall8(u64 control, u64 input1)
83 {
84 u64 hv_status;
85
86 #ifdef CONFIG_X86_64
87 {
88 __asm__ __volatile__(CALL_NOSPEC
89 : "=a" (hv_status), ASM_CALL_CONSTRAINT,
90 "+c" (control), "+d" (input1)
91 : THUNK_TARGET(hv_hypercall_pg)
92 : "cc", "r8", "r9", "r10", "r11");
93 }
94 #else
95 {
96 u32 input1_hi = upper_32_bits(input1);
97 u32 input1_lo = lower_32_bits(input1);
98
99 __asm__ __volatile__ (CALL_NOSPEC
100 : "=A"(hv_status),
101 "+c"(input1_lo),
102 ASM_CALL_CONSTRAINT
103 : "A" (control),
104 "b" (input1_hi),
105 THUNK_TARGET(hv_hypercall_pg)
106 : "cc", "edi", "esi");
107 }
108 #endif
109 return hv_status;
110 }
111
hv_do_fast_hypercall8(u16 code,u64 input1)112 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1)
113 {
114 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT;
115
116 return _hv_do_fast_hypercall8(control, input1);
117 }
118
hv_do_fast_nested_hypercall8(u16 code,u64 input1)119 static inline u64 hv_do_fast_nested_hypercall8(u16 code, u64 input1)
120 {
121 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT | HV_HYPERCALL_NESTED;
122
123 return _hv_do_fast_hypercall8(control, input1);
124 }
125
126 /* Fast hypercall with 16 bytes of input */
_hv_do_fast_hypercall16(u64 control,u64 input1,u64 input2)127 static inline u64 _hv_do_fast_hypercall16(u64 control, u64 input1, u64 input2)
128 {
129 u64 hv_status;
130
131 #ifdef CONFIG_X86_64
132 {
133 __asm__ __volatile__("mov %4, %%r8\n"
134 CALL_NOSPEC
135 : "=a" (hv_status), ASM_CALL_CONSTRAINT,
136 "+c" (control), "+d" (input1)
137 : "r" (input2),
138 THUNK_TARGET(hv_hypercall_pg)
139 : "cc", "r8", "r9", "r10", "r11");
140 }
141 #else
142 {
143 u32 input1_hi = upper_32_bits(input1);
144 u32 input1_lo = lower_32_bits(input1);
145 u32 input2_hi = upper_32_bits(input2);
146 u32 input2_lo = lower_32_bits(input2);
147
148 __asm__ __volatile__ (CALL_NOSPEC
149 : "=A"(hv_status),
150 "+c"(input1_lo), ASM_CALL_CONSTRAINT
151 : "A" (control), "b" (input1_hi),
152 "D"(input2_hi), "S"(input2_lo),
153 THUNK_TARGET(hv_hypercall_pg)
154 : "cc");
155 }
156 #endif
157 return hv_status;
158 }
159
hv_do_fast_hypercall16(u16 code,u64 input1,u64 input2)160 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2)
161 {
162 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT;
163
164 return _hv_do_fast_hypercall16(control, input1, input2);
165 }
166
hv_do_fast_nested_hypercall16(u16 code,u64 input1,u64 input2)167 static inline u64 hv_do_fast_nested_hypercall16(u16 code, u64 input1, u64 input2)
168 {
169 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT | HV_HYPERCALL_NESTED;
170
171 return _hv_do_fast_hypercall16(control, input1, input2);
172 }
173
174 extern struct hv_vp_assist_page **hv_vp_assist_page;
175
hv_get_vp_assist_page(unsigned int cpu)176 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
177 {
178 if (!hv_vp_assist_page)
179 return NULL;
180
181 return hv_vp_assist_page[cpu];
182 }
183
184 void __init hyperv_init(void);
185 void hyperv_setup_mmu_ops(void);
186 void set_hv_tscchange_cb(void (*cb)(void));
187 void clear_hv_tscchange_cb(void);
188 void hyperv_stop_tsc_emulation(void);
189 int hyperv_flush_guest_mapping(u64 as);
190 int hyperv_flush_guest_mapping_range(u64 as,
191 hyperv_fill_flush_list_func fill_func, void *data);
192 int hyperv_fill_flush_guest_mapping_list(
193 struct hv_guest_mapping_flush_list *flush,
194 u64 start_gfn, u64 end_gfn);
195
196 #ifdef CONFIG_X86_64
197 void hv_apic_init(void);
198 void __init hv_init_spinlocks(void);
199 bool hv_vcpu_is_preempted(int vcpu);
200 #else
hv_apic_init(void)201 static inline void hv_apic_init(void) {}
202 #endif
203
204 struct irq_domain *hv_create_pci_msi_domain(void);
205
206 int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector,
207 struct hv_interrupt_entry *entry);
208 int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry);
209 int hv_set_mem_host_visibility(unsigned long addr, int numpages, bool visible);
210
211 #ifdef CONFIG_AMD_MEM_ENCRYPT
212 void hv_ghcb_msr_write(u64 msr, u64 value);
213 void hv_ghcb_msr_read(u64 msr, u64 *value);
214 bool hv_ghcb_negotiate_protocol(void);
215 void hv_ghcb_terminate(unsigned int set, unsigned int reason);
216 #else
hv_ghcb_msr_write(u64 msr,u64 value)217 static inline void hv_ghcb_msr_write(u64 msr, u64 value) {}
hv_ghcb_msr_read(u64 msr,u64 * value)218 static inline void hv_ghcb_msr_read(u64 msr, u64 *value) {}
hv_ghcb_negotiate_protocol(void)219 static inline bool hv_ghcb_negotiate_protocol(void) { return false; }
hv_ghcb_terminate(unsigned int set,unsigned int reason)220 static inline void hv_ghcb_terminate(unsigned int set, unsigned int reason) {}
221 #endif
222
223 extern bool hv_isolation_type_snp(void);
224
hv_is_synic_reg(unsigned int reg)225 static inline bool hv_is_synic_reg(unsigned int reg)
226 {
227 return (reg >= HV_REGISTER_SCONTROL) &&
228 (reg <= HV_REGISTER_SINT15);
229 }
230
hv_is_sint_reg(unsigned int reg)231 static inline bool hv_is_sint_reg(unsigned int reg)
232 {
233 return (reg >= HV_REGISTER_SINT0) &&
234 (reg <= HV_REGISTER_SINT15);
235 }
236
237 u64 hv_get_register(unsigned int reg);
238 void hv_set_register(unsigned int reg, u64 value);
239 u64 hv_get_non_nested_register(unsigned int reg);
240 void hv_set_non_nested_register(unsigned int reg, u64 value);
241
242 #else /* CONFIG_HYPERV */
hyperv_init(void)243 static inline void hyperv_init(void) {}
hyperv_setup_mmu_ops(void)244 static inline void hyperv_setup_mmu_ops(void) {}
set_hv_tscchange_cb(void (* cb)(void))245 static inline void set_hv_tscchange_cb(void (*cb)(void)) {}
clear_hv_tscchange_cb(void)246 static inline void clear_hv_tscchange_cb(void) {}
hyperv_stop_tsc_emulation(void)247 static inline void hyperv_stop_tsc_emulation(void) {};
hv_get_vp_assist_page(unsigned int cpu)248 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
249 {
250 return NULL;
251 }
hyperv_flush_guest_mapping(u64 as)252 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)253 static inline int hyperv_flush_guest_mapping_range(u64 as,
254 hyperv_fill_flush_list_func fill_func, void *data)
255 {
256 return -1;
257 }
hv_set_register(unsigned int reg,u64 value)258 static inline void hv_set_register(unsigned int reg, u64 value) { }
hv_get_register(unsigned int reg)259 static inline u64 hv_get_register(unsigned int reg) { return 0; }
hv_set_non_nested_register(unsigned int reg,u64 value)260 static inline void hv_set_non_nested_register(unsigned int reg, u64 value) { }
hv_get_non_nested_register(unsigned int reg)261 static inline u64 hv_get_non_nested_register(unsigned int reg) { return 0; }
hv_set_mem_host_visibility(unsigned long addr,int numpages,bool visible)262 static inline int hv_set_mem_host_visibility(unsigned long addr, int numpages,
263 bool visible)
264 {
265 return -1;
266 }
267 #endif /* CONFIG_HYPERV */
268
269
270 #include <asm-generic/mshyperv.h>
271
272 #endif
273