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Diffstat (limited to 'arch/s390/include/asm/kvm_para.h')
| -rw-r--r-- | arch/s390/include/asm/kvm_para.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm_para.h b/arch/s390/include/asm/kvm_para.h new file mode 100644 index 000000000..cbc7c3a68 --- /dev/null +++ b/arch/s390/include/asm/kvm_para.h @@ -0,0 +1,206 @@ +/* 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 unsigned int kvm_arch_para_hints(void) +{ + return 0; +} + +static inline bool kvm_check_and_clear_guest_paused(void) +{ + return false; +} + +#endif /* __S390_KVM_PARA_H */ |