tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_MIPS_KVM_PARA_H
3#define _ASM_MIPS_KVM_PARA_H
4
5#include <uapi/asm/kvm_para.h>
6
7#define KVM_HYPERCALL ".word 0x42000028"
8
9/*
10 * Hypercalls for KVM.
11 *
12 * Hypercall number is passed in v0.
13 * Return value will be placed in v0.
14 * Up to 3 arguments are passed in a0, a1, and a2.
15 */
16static inline unsigned long kvm_hypercall0(unsigned long num)
17{
18 register unsigned long n asm("v0");
19 register unsigned long r asm("v0");
20
21 n = num;
22 __asm__ __volatile__(
23 KVM_HYPERCALL
24 : "=r" (r) : "r" (n) : "memory"
25 );
26
27 return r;
28}
29
30static inline unsigned long kvm_hypercall1(unsigned long num,
31 unsigned long arg0)
32{
33 register unsigned long n asm("v0");
34 register unsigned long r asm("v0");
35 register unsigned long a0 asm("a0");
36
37 n = num;
38 a0 = arg0;
39 __asm__ __volatile__(
40 KVM_HYPERCALL
41 : "=r" (r) : "r" (n), "r" (a0) : "memory"
42 );
43
44 return r;
45}
46
47static inline unsigned long kvm_hypercall2(unsigned long num,
48 unsigned long arg0, unsigned long arg1)
49{
50 register unsigned long n asm("v0");
51 register unsigned long r asm("v0");
52 register unsigned long a0 asm("a0");
53 register unsigned long a1 asm("a1");
54
55 n = num;
56 a0 = arg0;
57 a1 = arg1;
58 __asm__ __volatile__(
59 KVM_HYPERCALL
60 : "=r" (r) : "r" (n), "r" (a0), "r" (a1) : "memory"
61 );
62
63 return r;
64}
65
66static inline unsigned long kvm_hypercall3(unsigned long num,
67 unsigned long arg0, unsigned long arg1, unsigned long arg2)
68{
69 register unsigned long n asm("v0");
70 register unsigned long r asm("v0");
71 register unsigned long a0 asm("a0");
72 register unsigned long a1 asm("a1");
73 register unsigned long a2 asm("a2");
74
75 n = num;
76 a0 = arg0;
77 a1 = arg1;
78 a2 = arg2;
79 __asm__ __volatile__(
80 KVM_HYPERCALL
81 : "=r" (r) : "r" (n), "r" (a0), "r" (a1), "r" (a2) : "memory"
82 );
83
84 return r;
85}
86
87static inline bool kvm_check_and_clear_guest_paused(void)
88{
89 return false;
90}
91
92static inline unsigned int kvm_arch_para_features(void)
93{
94 return 0;
95}
96
97static inline unsigned int kvm_arch_para_hints(void)
98{
99 return 0;
100}
101
102#ifdef CONFIG_MIPS_PARAVIRT
103static inline bool kvm_para_available(void)
104{
105 return true;
106}
107#else
108static inline bool kvm_para_available(void)
109{
110 return false;
111}
112#endif
113
114
115#endif /* _ASM_MIPS_KVM_PARA_H */