1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Functions to retrieve information about the host system. 4 * 5 * Copyright (c) 2020 Red Hat Inc 6 * Copyright 2022 IBM Corp. 7 * 8 * Authors: 9 * Claudio Imbrenda <imbrenda@linux.ibm.com> 10 */ 11 12 #ifndef _S390X_HARDWARE_H_ 13 #define _S390X_HARDWARE_H_ 14 #include <asm/arch_def.h> 15 16 #define MACHINE_Z15 0x8561 17 #define MACHINE_Z15T02 0x8562 18 19 enum s390_host { 20 HOST_IS_UNKNOWN, 21 HOST_IS_LPAR, 22 HOST_IS_KVM, 23 HOST_IS_TCG 24 }; 25 26 enum s390_host detect_host(void); 27 28 static inline uint16_t get_machine_id(void) 29 { 30 return stidp() >> 16; 31 } 32 33 static inline bool host_is_tcg(void) 34 { 35 return detect_host() == HOST_IS_TCG; 36 } 37 38 static inline bool host_is_kvm(void) 39 { 40 return detect_host() == HOST_IS_KVM; 41 } 42 43 static inline bool host_is_lpar(void) 44 { 45 return detect_host() == HOST_IS_LPAR; 46 } 47 48 static inline bool host_is_qemu(void) 49 { 50 return host_is_tcg() || host_is_kvm(); 51 } 52 53 static inline bool machine_is_z15(void) 54 { 55 uint16_t machine = get_machine_id(); 56 57 return machine == MACHINE_Z15 || machine == MACHINE_Z15T02; 58 } 59 60 #endif /* _S390X_HARDWARE_H_ */ 61