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 */