[linux-2.6-block.git] / arch / mips / include / asm / kvm_para.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_MIPS_KVM_PARA_H
#define _ASM_MIPS_KVM_PARA_H

#include <uapi/asm/kvm_para.h>

#define KVM_HYPERCALL ".word 0x42000028"

/*
 * Hypercalls for KVM.
 *
 * Hypercall number is passed in v0.
 * Return value will be placed in v0.
 * Up to 3 arguments are passed in a0, a1, and a2.
 */
static inline unsigned long kvm_hypercall0(unsigned long num)
{
	register unsigned long n asm("v0");
	register unsigned long r asm("v0");

	n = num;
	__asm__ __volatile__(
		KVM_HYPERCALL
		: "=r" (r) : "r" (n) : "memory"
		);

	return r;
}

static inline unsigned long kvm_hypercall1(unsigned long num,
					unsigned long arg0)
{
	register unsigned long n asm("v0");
	register unsigned long r asm("v0");
	register unsigned long a0 asm("a0");

	n = num;
	a0 = arg0;
	__asm__ __volatile__(
		KVM_HYPERCALL
		: "=r" (r) : "r" (n), "r" (a0) : "memory"
		);

	return r;
}

static inline unsigned long kvm_hypercall2(unsigned long num,
					unsigned long arg0, unsigned long arg1)
{
	register unsigned long n asm("v0");
	register unsigned long r asm("v0");
	register unsigned long a0 asm("a0");
	register unsigned long a1 asm("a1");

	n = num;
	a0 = arg0;
	a1 = arg1;
	__asm__ __volatile__(
		KVM_HYPERCALL
		: "=r" (r) : "r" (n), "r" (a0), "r" (a1) : "memory"
		);

	return r;
}

static inline unsigned long kvm_hypercall3(unsigned long num,
	unsigned long arg0, unsigned long arg1, unsigned long arg2)
{
	register unsigned long n asm("v0");
	register unsigned long r asm("v0");
	register unsigned long a0 asm("a0");
	register unsigned long a1 asm("a1");
	register unsigned long a2 asm("a2");

	n = num;
	a0 = arg0;
	a1 = arg1;
	a2 = arg2;
	__asm__ __volatile__(
		KVM_HYPERCALL
		: "=r" (r) : "r" (n), "r" (a0), "r" (a1), "r" (a2) : "memory"
		);

	return r;
}

static inline bool kvm_check_and_clear_guest_paused(void)
{
	return false;
}

static inline unsigned int kvm_arch_para_features(void)
{
	return 0;
}

static inline unsigned int kvm_arch_para_hints(void)
{
	return 0;
}

#ifdef CONFIG_MIPS_PARAVIRT
static inline bool kvm_para_available(void)
{
	return true;
}
#else
static inline bool kvm_para_available(void)
{
	return false;
}
#endif


#endif /* _ASM_MIPS_KVM_PARA_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
90dfdc7c DD	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	*/
	16	static 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
	30	static 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
	47	static 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
66	static 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
87	static inline bool kvm_check_and_clear_guest_paused(void)
88	{
89	return false;
90	}
91
92	static inline unsigned int kvm_arch_para_features(void)
93	{
94	return 0;
95	}
96
a4429e53 WL	97	static inline unsigned int kvm_arch_para_hints(void)
	98	{
	99	return 0;
	100	}
	101
90dfdc7c DD	102	#ifdef CONFIG_MIPS_PARAVIRT
	103	static inline bool kvm_para_available(void)
	104	{
	105	return true;
	106	}
	107	#else
	108	static inline bool kvm_para_available(void)
	109	{
	110	return false;
	111	}
	112	#endif
	113
	114
	115	#endif /* _ASM_MIPS_KVM_PARA_H */