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18#ifndef _ASM_GENERIC_MSHYPERV_H
19#define _ASM_GENERIC_MSHYPERV_H
20
21#include <linux/types.h>
22#include <linux/atomic.h>
23#include <linux/bitops.h>
24#include <linux/cpumask.h>
25#include <asm/ptrace.h>
26#include <asm/hyperv-tlfs.h>
27
28struct ms_hyperv_info {
29 u32 features;
30 u32 misc_features;
31 u32 hints;
32 u32 nested_features;
33 u32 max_vp_index;
34 u32 max_lp_index;
35};
36extern struct ms_hyperv_info ms_hyperv;
37
38extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr);
39extern u64 hv_do_fast_hypercall8(u16 control, u64 input8);
40
41
42
43static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version,
44 __u64 d_info2)
45{
46 __u64 guest_id = 0;
47
48 guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48);
49 guest_id |= (d_info1 << 48);
50 guest_id |= (kernel_version << 16);
51 guest_id |= d_info2;
52
53 return guest_id;
54}
55
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57
58static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
59{
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70 if (cmpxchg(&msg->header.message_type, old_msg_type,
71 HVMSG_NONE) != old_msg_type)
72 return;
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82 if (msg->header.message_flags.msg_pending) {
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88 hv_signal_eom();
89 }
90}
91
92void hv_setup_vmbus_irq(void (*handler)(void));
93void hv_remove_vmbus_irq(void);
94void hv_enable_vmbus_irq(void);
95void hv_disable_vmbus_irq(void);
96
97void hv_setup_kexec_handler(void (*handler)(void));
98void hv_remove_kexec_handler(void);
99void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs));
100void hv_remove_crash_handler(void);
101
102#if IS_ENABLED(CONFIG_HYPERV)
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109extern u32 *hv_vp_index;
110extern u32 hv_max_vp_index;
111
112
113#define VP_INVAL U32_MAX
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126static inline int hv_cpu_number_to_vp_number(int cpu_number)
127{
128 return hv_vp_index[cpu_number];
129}
130
131static inline int cpumask_to_vpset(struct hv_vpset *vpset,
132 const struct cpumask *cpus)
133{
134 int cpu, vcpu, vcpu_bank, vcpu_offset, nr_bank = 1;
135
136
137 if (hv_max_vp_index / 64 >= 64)
138 return 0;
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144
145 for (vcpu_bank = 0; vcpu_bank <= hv_max_vp_index / 64; vcpu_bank++)
146 vpset->bank_contents[vcpu_bank] = 0;
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150
151 for_each_cpu(cpu, cpus) {
152 vcpu = hv_cpu_number_to_vp_number(cpu);
153 if (vcpu == VP_INVAL)
154 return -1;
155 vcpu_bank = vcpu / 64;
156 vcpu_offset = vcpu % 64;
157 __set_bit(vcpu_offset, (unsigned long *)
158 &vpset->bank_contents[vcpu_bank]);
159 if (vcpu_bank >= nr_bank)
160 nr_bank = vcpu_bank + 1;
161 }
162 vpset->valid_bank_mask = GENMASK_ULL(nr_bank - 1, 0);
163 return nr_bank;
164}
165
166void hyperv_report_panic(struct pt_regs *regs, long err);
167void hyperv_report_panic_msg(phys_addr_t pa, size_t size);
168bool hv_is_hyperv_initialized(void);
169void hyperv_cleanup(void);
170#else
171static inline bool hv_is_hyperv_initialized(void) { return false; }
172static inline void hyperv_cleanup(void) {}
173#endif
174
175#if IS_ENABLED(CONFIG_HYPERV)
176extern int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void));
177extern void hv_remove_stimer0_irq(int irq);
178#endif
179
180#endif
181