1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_MSHYPER_H
3 #define _ASM_X86_MSHYPER_H
5 #include <linux/types.h>
9 #include <asm/hyperv-tlfs.h>
10 #include <asm/nospec-branch.h>
11 #include <asm/paravirt.h>
13 typedef int (*hyperv_fill_flush_list_func)(
14 struct hv_guest_mapping_flush_list *flush,
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)
22 #define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val)
23 #define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val)
25 #define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val)
26 #define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val)
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)
31 #define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index)
33 #define hv_signal_eom() wrmsrl(HV_X64_MSR_EOM, 0)
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))
42 #define hv_get_crash_ctl(val) \
43 rdmsrl(HV_X64_MSR_CRASH_CTL, val)
45 #define hv_get_time_ref_count(val) \
46 rdmsrl(HV_X64_MSR_TIME_REF_COUNT, val)
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
60 * Reference to pv_ops must be inline so objtool
61 * detection of noinstr violations can work correctly.
63 static __always_inline void hv_setup_sched_clock(void *sched_clock)
65 #ifdef CONFIG_PARAVIRT
66 paravirt_set_sched_clock(sched_clock);
70 void hyperv_vector_handler(struct pt_regs *regs);
72 static inline void hv_enable_stimer0_percpu_irq(int irq) {}
73 static inline void hv_disable_stimer0_percpu_irq(int irq) {}
76 #if IS_ENABLED(CONFIG_HYPERV)
77 extern int hyperv_init_cpuhp;
79 extern void *hv_hypercall_pg;
80 extern void __percpu **hyperv_pcpu_input_arg;
81 extern void __percpu **hyperv_pcpu_output_arg;
83 extern u64 hv_current_partition_id;
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);
89 static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
91 u64 input_address = input ? virt_to_phys(input) : 0;
92 u64 output_address = output ? virt_to_phys(output) : 0;
99 __asm__ __volatile__("mov %4, %%r8\n"
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");
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);
112 if (!hv_hypercall_pg)
115 __asm__ __volatile__(CALL_NOSPEC
117 "+c" (input_address_lo), ASM_CALL_CONSTRAINT
119 "b" (input_address_hi),
120 "D"(output_address_hi), "S"(output_address_lo),
121 THUNK_TARGET(hv_hypercall_pg)
127 /* Fast hypercall with 8 bytes of input and no output */
128 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1)
130 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT;
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");
142 u32 input1_hi = upper_32_bits(input1);
143 u32 input1_lo = lower_32_bits(input1);
145 __asm__ __volatile__ (CALL_NOSPEC
151 THUNK_TARGET(hv_hypercall_pg)
152 : "cc", "edi", "esi");
158 /* Fast hypercall with 16 bytes of input */
159 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2)
161 u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT;
165 __asm__ __volatile__("mov %4, %%r8\n"
167 : "=a" (hv_status), ASM_CALL_CONSTRAINT,
168 "+c" (control), "+d" (input1)
170 THUNK_TARGET(hv_hypercall_pg)
171 : "cc", "r8", "r9", "r10", "r11");
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);
180 __asm__ __volatile__ (CALL_NOSPEC
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)
193 * Rep hypercalls. Callers of this functions are supposed to ensure that
194 * rep_count and varhead_size comply with Hyper-V hypercall definition.
196 static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size,
197 void *input, void *output)
203 control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET;
204 control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET;
207 status = hv_do_hypercall(control, input, output);
208 if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS)
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;
215 control &= ~HV_HYPERCALL_REP_START_MASK;
216 control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET;
218 touch_nmi_watchdog();
219 } while (rep_comp < rep_count);
224 extern struct hv_vp_assist_page **hv_vp_assist_page;
226 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
228 if (!hv_vp_assist_page)
231 return hv_vp_assist_page[cpu];
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);
249 extern bool hv_root_partition;
252 void hv_apic_init(void);
253 void __init hv_init_spinlocks(void);
254 bool hv_vcpu_is_preempted(int vcpu);
256 static inline void hv_apic_init(void) {}
259 static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry,
260 struct msi_desc *msi_desc)
262 msi_entry->address.as_uint32 = msi_desc->msg.address_lo;
263 msi_entry->data.as_uint32 = msi_desc->msg.data;
266 struct irq_domain *hv_create_pci_msi_domain(void);
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);
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)
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)
290 #endif /* CONFIG_HYPERV */
293 #include <asm-generic/mshyperv.h>