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192.168.1.100 / T108 / e958203796650e3959a43708d67534bf36f4c83b / . / marvell / linux / arch / x86 / include / asm / kvm_para.h
blob: f913f62eb6c3512478ab622054471aa9db6b9454 [file] [log] [blame]
b.liue9582032025-04-17 19:18:16 +0800[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_KVM_PARA_H
3#define _ASM_X86_KVM_PARA_H
4
5#include <asm/processor.h>
6#include <asm/alternative.h>
7#include <uapi/asm/kvm_para.h>
8
9#ifdef CONFIG_KVM_GUEST
10bool kvm_check_and_clear_guest_paused(void);
11#else
12static inline bool kvm_check_and_clear_guest_paused(void)
13{
14 return false;
15}
16#endif /* CONFIG_KVM_GUEST */
17
18#define KVM_HYPERCALL \
19 ALTERNATIVE(".byte 0x0f,0x01,0xc1", ".byte 0x0f,0x01,0xd9", X86_FEATURE_VMMCALL)
20
21/* For KVM hypercalls, a three-byte sequence of either the vmcall or the vmmcall
22 * instruction. The hypervisor may replace it with something else but only the
23 * instructions are guaranteed to be supported.
24 *
25 * Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively.
26 * The hypercall number should be placed in rax and the return value will be
27 * placed in rax. No other registers will be clobbered unless explicitly
28 * noted by the particular hypercall.
29 */
30
31static inline long kvm_hypercall0(unsigned int nr)
32{
33 long ret;
34 asm volatile(KVM_HYPERCALL
35 : "=a"(ret)
36 : "a"(nr)
37 : "memory");
38 return ret;
39}
40
41static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
42{
43 long ret;
44 asm volatile(KVM_HYPERCALL
45 : "=a"(ret)
46 : "a"(nr), "b"(p1)
47 : "memory");
48 return ret;
49}
50
51static inline long kvm_hypercall2(unsigned int nr, unsigned long p1,
52 unsigned long p2)
53{
54 long ret;
55 asm volatile(KVM_HYPERCALL
56 : "=a"(ret)
57 : "a"(nr), "b"(p1), "c"(p2)
58 : "memory");
59 return ret;
60}
61
62static inline long kvm_hypercall3(unsigned int nr, unsigned long p1,
63 unsigned long p2, unsigned long p3)
64{
65 long ret;
66 asm volatile(KVM_HYPERCALL
67 : "=a"(ret)
68 : "a"(nr), "b"(p1), "c"(p2), "d"(p3)
69 : "memory");
70 return ret;
71}
72
73static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
74 unsigned long p2, unsigned long p3,
75 unsigned long p4)
76{
77 long ret;
78 asm volatile(KVM_HYPERCALL
79 : "=a"(ret)
80 : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4)
81 : "memory");
82 return ret;
83}
84
85#ifdef CONFIG_KVM_GUEST
86void kvmclock_init(void);
87void kvmclock_disable(void);
88bool kvm_para_available(void);
89unsigned int kvm_arch_para_features(void);
90unsigned int kvm_arch_para_hints(void);
91void kvm_async_pf_task_wait(u32 token, int interrupt_kernel);
92void kvm_async_pf_task_wake(u32 token);
93u32 kvm_read_and_reset_pf_reason(void);
94void do_async_page_fault(struct pt_regs *regs, unsigned long error_code, unsigned long address);
95
96#ifdef CONFIG_PARAVIRT_SPINLOCKS
97void __init kvm_spinlock_init(void);
98#else /* !CONFIG_PARAVIRT_SPINLOCKS */
99static inline void kvm_spinlock_init(void)
100{
101}
102#endif /* CONFIG_PARAVIRT_SPINLOCKS */
103
104#else /* CONFIG_KVM_GUEST */
105#define kvm_async_pf_task_wait(T, I) do {} while(0)
106#define kvm_async_pf_task_wake(T) do {} while(0)
107
108static inline bool kvm_para_available(void)
109{
110 return false;
111}
112
113static inline unsigned int kvm_arch_para_features(void)
114{
115 return 0;
116}
117
118static inline unsigned int kvm_arch_para_hints(void)
119{
120 return 0;
121}
122
123static inline u32 kvm_read_and_reset_pf_reason(void)
124{
125 return 0;
126}
127#endif
128
129#endif /* _ASM_X86_KVM_PARA_H */