151 lines
4.5 KiB
C
151 lines
4.5 KiB
C
/*
|
|
* asm-s390/kvm_para.h - definition for paravirtual devices on s390
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (version 2 only)
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef __S390_KVM_PARA_H
|
|
#define __S390_KVM_PARA_H
|
|
|
|
/*
|
|
* 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>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2.
|
|
*/
|
|
|
|
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_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_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_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_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_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_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;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
#endif /* __S390_KVM_PARA_H */
|