[mirror_ubuntu-bionic-kernel.git] / arch / s390 / include / asm / kvm_para.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * definition for paravirtual devices on s390
 *
 * Copyright IBM Corp. 2008
 *
 *    Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
 */
/*
 * Hypercalls for KVM on s390. The calling convention is similar to the
 * s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
 * as hypercall number and R7 as parameter 6. The return value is
 * written to R2. We use the diagnose instruction as hypercall. To avoid
 * conflicts with existing diagnoses for LPAR and z/VM, we do not use
 * the instruction encoded number, but specify the number in R1 and
 * use 0x500 as KVM hypercall
 *
 * Copyright IBM Corp. 2007,2008
 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
 */
#ifndef __S390_KVM_PARA_H
#define __S390_KVM_PARA_H

#include <uapi/asm/kvm_para.h>
#include <asm/diag.h>

static inline long __kvm_hypercall0(unsigned long nr)
{
	register unsigned long __nr asm("1") = nr;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr): "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall0(unsigned long nr)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall0(nr);
}

static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall1(unsigned long nr, unsigned long p1)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall1(nr, p1);
}

static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1,
			       unsigned long p2)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2)
		      : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall2(unsigned long nr, unsigned long p1,
			       unsigned long p2)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall2(nr, p1, p2);
}

static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3) : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall3(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall3(nr, p1, p2, p3);
}

static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register unsigned long __p4 asm("5") = p4;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3), "d" (__p4) : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall4(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall4(nr, p1, p2, p3, p4);
}

static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register unsigned long __p4 asm("5") = p4;
	register unsigned long __p5 asm("6") = p5;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3), "d" (__p4), "d" (__p5)  : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall5(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall5(nr, p1, p2, p3, p4, p5);
}

static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5,
			       unsigned long p6)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register unsigned long __p4 asm("5") = p4;
	register unsigned long __p5 asm("6") = p5;
	register unsigned long __p6 asm("7") = p6;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6)
		      : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall6(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5,
			       unsigned long p6)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6);
}

/* kvm on s390 is always paravirtualization enabled */
static inline int kvm_para_available(void)
{
	return 1;
}

/* No feature bits are currently assigned for kvm on s390 */
static inline unsigned int kvm_arch_para_features(void)
{
	return 0;
}

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

#endif /* __S390_KVM_PARA_H */
Commit	Line	Data
0b73214f	1	/* SPDX-License-Identifier: GPL-2.0 */
b0c632db	2	/*
a53c8fab	3	* definition for paravirtual devices on s390
b0c632db HC	4	*
	5	* Copyright IBM Corp. 2008
	6	*
b0c632db HC	7	* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
b0c632db HC	8	*/
b0c632db	9	/*
e976a2b9 CB	10	* Hypercalls for KVM on s390. The calling convention is similar to the
	11	* s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
	12	* as hypercall number and R7 as parameter 6. The return value is
	13	* written to R2. We use the diagnose instruction as hypercall. To avoid
	14	* conflicts with existing diagnoses for LPAR and z/VM, we do not use
	15	* the instruction encoded number, but specify the number in R1 and
	16	* use 0x500 as KVM hypercall
	17	*
	18	* Copyright IBM Corp. 2007,2008
	19	* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
b0c632db	20	*/
9807f759 DH	21	#ifndef __S390_KVM_PARA_H
	22	#define __S390_KVM_PARA_H
	23
	24	#include <uapi/asm/kvm_para.h>
1ec2772e	25	#include <asm/diag.h>
9807f759	26
1ec2772e	27	static inline long __kvm_hypercall0(unsigned long nr)
e976a2b9 CB	28	{
	29	register unsigned long __nr asm("1") = nr;
	30	register long __rc asm("2");
	31
	32	asm volatile ("diag 2,4,0x500\n"
	33	: "=d" (__rc) : "d" (__nr): "memory", "cc");
	34	return __rc;
	35	}
	36
1ec2772e MS	37	static inline long kvm_hypercall0(unsigned long nr)
	38	{
	39	diag_stat_inc(DIAG_STAT_X500);
	40	return __kvm_hypercall0(nr);
	41	}
	42
	43	static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1)
e976a2b9 CB	44	{
	45	register unsigned long __nr asm("1") = nr;
	46	register unsigned long __p1 asm("2") = p1;
	47	register long __rc asm("2");
	48
	49	asm volatile ("diag 2,4,0x500\n"
	50	: "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc");
	51	return __rc;
	52	}
	53
1ec2772e MS	54	static inline long kvm_hypercall1(unsigned long nr, unsigned long p1)
	55	{
	56	diag_stat_inc(DIAG_STAT_X500);
	57	return __kvm_hypercall1(nr, p1);
	58	}
	59
	60	static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1,
e976a2b9 CB	61	unsigned long p2)
	62	{
	63	register unsigned long __nr asm("1") = nr;
	64	register unsigned long __p1 asm("2") = p1;
	65	register unsigned long __p2 asm("3") = p2;
	66	register long __rc asm("2");
	67
	68	asm volatile ("diag 2,4,0x500\n"
	69	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2)
	70	: "memory", "cc");
	71	return __rc;
	72	}
	73
1ec2772e MS	74	static inline long kvm_hypercall2(unsigned long nr, unsigned long p1,
	75	unsigned long p2)
	76	{
	77	diag_stat_inc(DIAG_STAT_X500);
	78	return __kvm_hypercall2(nr, p1, p2);
	79	}
	80
	81	static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1,
e976a2b9 CB	82	unsigned long p2, unsigned long p3)
	83	{
	84	register unsigned long __nr asm("1") = nr;
	85	register unsigned long __p1 asm("2") = p1;
	86	register unsigned long __p2 asm("3") = p2;
	87	register unsigned long __p3 asm("4") = p3;
	88	register long __rc asm("2");
	89
	90	asm volatile ("diag 2,4,0x500\n"
	91	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	92	"d" (__p3) : "memory", "cc");
	93	return __rc;
	94	}
	95
1ec2772e MS	96	static inline long kvm_hypercall3(unsigned long nr, unsigned long p1,
	97	unsigned long p2, unsigned long p3)
	98	{
	99	diag_stat_inc(DIAG_STAT_X500);
	100	return __kvm_hypercall3(nr, p1, p2, p3);
	101	}
e976a2b9	102
1ec2772e	103	static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1,
e976a2b9 CB	104	unsigned long p2, unsigned long p3,
	105	unsigned long p4)
	106	{
	107	register unsigned long __nr asm("1") = nr;
	108	register unsigned long __p1 asm("2") = p1;
	109	register unsigned long __p2 asm("3") = p2;
	110	register unsigned long __p3 asm("4") = p3;
	111	register unsigned long __p4 asm("5") = p4;
	112	register long __rc asm("2");
	113
	114	asm volatile ("diag 2,4,0x500\n"
	115	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	116	"d" (__p3), "d" (__p4) : "memory", "cc");
	117	return __rc;
	118	}
	119
1ec2772e MS	120	static inline long kvm_hypercall4(unsigned long nr, unsigned long p1,
	121	unsigned long p2, unsigned long p3,
	122	unsigned long p4)
	123	{
	124	diag_stat_inc(DIAG_STAT_X500);
	125	return __kvm_hypercall4(nr, p1, p2, p3, p4);
	126	}
	127
	128	static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1,
e976a2b9 CB	129	unsigned long p2, unsigned long p3,
	130	unsigned long p4, unsigned long p5)
	131	{
	132	register unsigned long __nr asm("1") = nr;
	133	register unsigned long __p1 asm("2") = p1;
	134	register unsigned long __p2 asm("3") = p2;
	135	register unsigned long __p3 asm("4") = p3;
	136	register unsigned long __p4 asm("5") = p4;
	137	register unsigned long __p5 asm("6") = p5;
	138	register long __rc asm("2");
	139
	140	asm volatile ("diag 2,4,0x500\n"
	141	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	142	"d" (__p3), "d" (__p4), "d" (__p5) : "memory", "cc");
	143	return __rc;
	144	}
	145
1ec2772e MS	146	static inline long kvm_hypercall5(unsigned long nr, unsigned long p1,
	147	unsigned long p2, unsigned long p3,
	148	unsigned long p4, unsigned long p5)
	149	{
	150	diag_stat_inc(DIAG_STAT_X500);
	151	return __kvm_hypercall5(nr, p1, p2, p3, p4, p5);
	152	}
	153
	154	static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1,
e976a2b9 CB	155	unsigned long p2, unsigned long p3,
	156	unsigned long p4, unsigned long p5,
	157	unsigned long p6)
	158	{
	159	register unsigned long __nr asm("1") = nr;
	160	register unsigned long __p1 asm("2") = p1;
	161	register unsigned long __p2 asm("3") = p2;
	162	register unsigned long __p3 asm("4") = p3;
	163	register unsigned long __p4 asm("5") = p4;
	164	register unsigned long __p5 asm("6") = p5;
	165	register unsigned long __p6 asm("7") = p6;
	166	register long __rc asm("2");
	167
	168	asm volatile ("diag 2,4,0x500\n"
	169	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	170	"d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6)
	171	: "memory", "cc");
	172	return __rc;
	173	}
	174
1ec2772e MS	175	static inline long kvm_hypercall6(unsigned long nr, unsigned long p1,
	176	unsigned long p2, unsigned long p3,
	177	unsigned long p4, unsigned long p5,
	178	unsigned long p6)
	179	{
	180	diag_stat_inc(DIAG_STAT_X500);
	181	return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6);
	182	}
	183
e976a2b9	184	/* kvm on s390 is always paravirtualization enabled */
b0c632db HC	185	static inline int kvm_para_available(void)
b0c632db HC	186	{
e976a2b9	187	return 1;
b0c632db HC	188	}
b0c632db HC	189
e976a2b9	190	/* No feature bits are currently assigned for kvm on s390 */
b0c632db HC	191	static inline unsigned int kvm_arch_para_features(void)
	192	{
	193	return 0;
	194	}
	195
3b5d56b9 EM	196	static inline bool kvm_check_and_clear_guest_paused(void)
	197	{
	198	return false;
	199	}
	200
b0c632db	201	#endif /* __S390_KVM_PARA_H */