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a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
159 lines
4.6 KiB
C
159 lines
4.6 KiB
C
/*
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* definition for paravirtual devices on s390
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*
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* Copyright IBM Corp. 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
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*/
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#ifndef __S390_KVM_PARA_H
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#define __S390_KVM_PARA_H
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#ifdef __KERNEL__
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/*
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* Hypercalls for KVM on s390. The calling convention is similar to the
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* s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
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* as hypercall number and R7 as parameter 6. The return value is
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* written to R2. We use the diagnose instruction as hypercall. To avoid
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* conflicts with existing diagnoses for LPAR and z/VM, we do not use
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* the instruction encoded number, but specify the number in R1 and
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* use 0x500 as KVM hypercall
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*
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* Copyright IBM Corp. 2007,2008
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* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2.
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*/
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static inline long kvm_hypercall0(unsigned long nr)
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{
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register unsigned long __nr asm("1") = nr;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr): "memory", "cc");
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return __rc;
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}
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static inline long kvm_hypercall1(unsigned long nr, unsigned long p1)
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{
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register unsigned long __nr asm("1") = nr;
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register unsigned long __p1 asm("2") = p1;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc");
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return __rc;
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}
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static inline long kvm_hypercall2(unsigned long nr, unsigned long p1,
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unsigned long p2)
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{
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register unsigned long __nr asm("1") = nr;
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register unsigned long __p1 asm("2") = p1;
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register unsigned long __p2 asm("3") = p2;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2)
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: "memory", "cc");
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return __rc;
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}
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static inline long kvm_hypercall3(unsigned long nr, unsigned long p1,
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unsigned long p2, unsigned long p3)
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{
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register unsigned long __nr asm("1") = nr;
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register unsigned long __p1 asm("2") = p1;
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register unsigned long __p2 asm("3") = p2;
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register unsigned long __p3 asm("4") = p3;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
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"d" (__p3) : "memory", "cc");
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return __rc;
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}
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static inline long kvm_hypercall4(unsigned long nr, unsigned long p1,
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unsigned long p2, unsigned long p3,
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unsigned long p4)
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{
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register unsigned long __nr asm("1") = nr;
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register unsigned long __p1 asm("2") = p1;
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register unsigned long __p2 asm("3") = p2;
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register unsigned long __p3 asm("4") = p3;
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register unsigned long __p4 asm("5") = p4;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
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"d" (__p3), "d" (__p4) : "memory", "cc");
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return __rc;
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}
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static inline long kvm_hypercall5(unsigned long nr, unsigned long p1,
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unsigned long p2, unsigned long p3,
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unsigned long p4, unsigned long p5)
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{
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register unsigned long __nr asm("1") = nr;
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register unsigned long __p1 asm("2") = p1;
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register unsigned long __p2 asm("3") = p2;
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register unsigned long __p3 asm("4") = p3;
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register unsigned long __p4 asm("5") = p4;
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register unsigned long __p5 asm("6") = p5;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
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"d" (__p3), "d" (__p4), "d" (__p5) : "memory", "cc");
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return __rc;
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}
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static inline long kvm_hypercall6(unsigned long nr, unsigned long p1,
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unsigned long p2, unsigned long p3,
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unsigned long p4, unsigned long p5,
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unsigned long p6)
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{
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register unsigned long __nr asm("1") = nr;
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register unsigned long __p1 asm("2") = p1;
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register unsigned long __p2 asm("3") = p2;
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register unsigned long __p3 asm("4") = p3;
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register unsigned long __p4 asm("5") = p4;
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register unsigned long __p5 asm("6") = p5;
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register unsigned long __p6 asm("7") = p6;
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register long __rc asm("2");
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asm volatile ("diag 2,4,0x500\n"
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: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
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"d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6)
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: "memory", "cc");
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return __rc;
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}
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/* kvm on s390 is always paravirtualization enabled */
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static inline int kvm_para_available(void)
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{
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return 1;
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}
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/* No feature bits are currently assigned for kvm on s390 */
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static inline unsigned int kvm_arch_para_features(void)
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{
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return 0;
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}
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static inline bool kvm_check_and_clear_guest_paused(void)
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{
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return false;
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}
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#endif
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#endif /* __S390_KVM_PARA_H */
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