1 /*
2 * definition for kvm on s390
3 *
4 * Copyright IBM Corp. 2008, 2009
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
13 */
14
15 #ifndef ARCH_S390_KVM_S390_H
16 #define ARCH_S390_KVM_S390_H
17
18 #include <linux/hrtimer.h>
19 #include <linux/kvm.h>
20 #include <linux/kvm_host.h>
21
22 /* The current code can have up to 256 pages for virtio */
23 #define VIRTIODESCSPACE (256ul * 4096ul)
24
25 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
26
27 /* negativ values are error codes, positive values for internal conditions */
28 #define SIE_INTERCEPT_RERUNVCPU (1<<0)
29 #define SIE_INTERCEPT_UCONTROL (1<<1)
30 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
31
32 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
33 do { \
34 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
35 d_args); \
36 } while (0)
37
38 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
39 do { \
40 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
41 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
42 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
43 d_args); \
44 } while (0)
45
__cpu_is_stopped(struct kvm_vcpu * vcpu)46 static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
47 {
48 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
49 }
50
kvm_is_ucontrol(struct kvm * kvm)51 static inline int kvm_is_ucontrol(struct kvm *kvm)
52 {
53 #ifdef CONFIG_KVM_S390_UCONTROL
54 if (kvm->arch.gmap)
55 return 0;
56 return 1;
57 #else
58 return 0;
59 #endif
60 }
61
kvm_s390_set_prefix(struct kvm_vcpu * vcpu,u32 prefix)62 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
63 {
64 vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
65 vcpu->arch.sie_block->ihcpu = 0xffff;
66 }
67
kvm_s390_get_base_disp_s(struct kvm_vcpu * vcpu)68 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
69 {
70 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
71 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
72
73 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
74 }
75
kvm_s390_get_base_disp_sse(struct kvm_vcpu * vcpu,u64 * address1,u64 * address2)76 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
77 u64 *address1, u64 *address2)
78 {
79 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
80 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
81 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
82 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
83
84 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
85 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
86 }
87
kvm_s390_get_base_disp_rsy(struct kvm_vcpu * vcpu)88 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
89 {
90 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
91 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
92 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
93 /* The displacement is a 20bit _SIGNED_ value */
94 if (disp2 & 0x80000)
95 disp2+=0xfff00000;
96
97 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
98 }
99
kvm_s390_get_base_disp_rs(struct kvm_vcpu * vcpu)100 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
101 {
102 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
103 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
104
105 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
106 }
107
108 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
109 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
110 void kvm_s390_tasklet(unsigned long parm);
111 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
112 void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
113 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
114 struct kvm_s390_interrupt *s390int);
115 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
116 struct kvm_s390_interrupt *s390int);
117 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
118 int __must_check kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
119 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
120 u64 cr6, u64 schid);
121
122 /* implemented in priv.c */
123 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
124 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
125 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
126 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
127 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
128 int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu);
129
130 /* implemented in sigp.c */
131 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
132
133 /* implemented in kvm-s390.c */
134 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
135 unsigned long addr);
136 /* implemented in diag.c */
137 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
138
139 #endif
140