2 * intercept.c - in-kernel handling for sie intercepts
4 * Copyright IBM Corp. 2008
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.
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
14 #include <linux/kvm_host.h>
15 #include <linux/errno.h>
16 #include <linux/pagemap.h>
18 #include <asm/kvm_host.h>
23 static int handle_lctg(struct kvm_vcpu
*vcpu
)
25 int reg1
= (vcpu
->arch
.sie_block
->ipa
& 0x00f0) >> 4;
26 int reg3
= vcpu
->arch
.sie_block
->ipa
& 0x000f;
27 int base2
= vcpu
->arch
.sie_block
->ipb
>> 28;
28 int disp2
= ((vcpu
->arch
.sie_block
->ipb
& 0x0fff0000) >> 16) +
29 ((vcpu
->arch
.sie_block
->ipb
& 0xff00) << 4);
33 vcpu
->stat
.instruction_lctg
++;
34 if ((vcpu
->arch
.sie_block
->ipb
& 0xff) != 0x2f)
39 useraddr
+= vcpu
->arch
.guest_gprs
[base2
];
43 VCPU_EVENT(vcpu
, 5, "lctg r1:%x, r3:%x,b2:%x,d2:%x", reg1
, reg3
, base2
,
47 rc
= get_guest_u64(vcpu
, useraddr
,
48 &vcpu
->arch
.sie_block
->gcr
[reg
]);
50 kvm_s390_inject_program_int(vcpu
, PGM_ADDRESSING
);
61 static int handle_lctl(struct kvm_vcpu
*vcpu
)
63 int reg1
= (vcpu
->arch
.sie_block
->ipa
& 0x00f0) >> 4;
64 int reg3
= vcpu
->arch
.sie_block
->ipa
& 0x000f;
65 int base2
= vcpu
->arch
.sie_block
->ipb
>> 28;
66 int disp2
= ((vcpu
->arch
.sie_block
->ipb
& 0x0fff0000) >> 16);
71 vcpu
->stat
.instruction_lctl
++;
75 useraddr
+= vcpu
->arch
.guest_gprs
[base2
];
77 VCPU_EVENT(vcpu
, 5, "lctl r1:%x, r3:%x,b2:%x,d2:%x", reg1
, reg3
, base2
,
82 rc
= get_guest_u32(vcpu
, useraddr
, &val
);
84 kvm_s390_inject_program_int(vcpu
, PGM_ADDRESSING
);
87 vcpu
->arch
.sie_block
->gcr
[reg
] &= 0xffffffff00000000ul
;
88 vcpu
->arch
.sie_block
->gcr
[reg
] |= val
;
97 static intercept_handler_t instruction_handlers
[256] = {
98 [0x83] = kvm_s390_handle_diag
,
99 [0xae] = kvm_s390_handle_sigp
,
100 [0xb2] = kvm_s390_handle_priv
,
101 [0xb7] = handle_lctl
,
102 [0xeb] = handle_lctg
,
105 static int handle_noop(struct kvm_vcpu
*vcpu
)
107 switch (vcpu
->arch
.sie_block
->icptcode
) {
109 vcpu
->stat
.exit_external_request
++;
112 vcpu
->stat
.exit_external_interrupt
++;
120 static int handle_stop(struct kvm_vcpu
*vcpu
)
124 vcpu
->stat
.exit_stop_request
++;
125 atomic_clear_mask(CPUSTAT_RUNNING
, &vcpu
->arch
.sie_block
->cpuflags
);
126 spin_lock_bh(&vcpu
->arch
.local_int
.lock
);
127 if (vcpu
->arch
.local_int
.action_bits
& ACTION_STORE_ON_STOP
) {
128 vcpu
->arch
.local_int
.action_bits
&= ~ACTION_STORE_ON_STOP
;
129 rc
= __kvm_s390_vcpu_store_status(vcpu
,
130 KVM_S390_STORE_STATUS_NOADDR
);
135 if (vcpu
->arch
.local_int
.action_bits
& ACTION_STOP_ON_STOP
) {
136 vcpu
->arch
.local_int
.action_bits
&= ~ACTION_STOP_ON_STOP
;
137 VCPU_EVENT(vcpu
, 3, "%s", "cpu stopped");
141 spin_unlock_bh(&vcpu
->arch
.local_int
.lock
);
145 static int handle_validity(struct kvm_vcpu
*vcpu
)
147 int viwhy
= vcpu
->arch
.sie_block
->ipb
>> 16;
148 vcpu
->stat
.exit_validity
++;
150 fault_in_pages_writeable((char __user
*)
151 vcpu
->kvm
->arch
.guest_origin
+
152 vcpu
->arch
.sie_block
->prefix
,
156 VCPU_EVENT(vcpu
, 2, "unhandled validity intercept code %d",
161 static int handle_instruction(struct kvm_vcpu
*vcpu
)
163 intercept_handler_t handler
;
165 vcpu
->stat
.exit_instruction
++;
166 handler
= instruction_handlers
[vcpu
->arch
.sie_block
->ipa
>> 8];
168 return handler(vcpu
);
172 static int handle_prog(struct kvm_vcpu
*vcpu
)
174 vcpu
->stat
.exit_program_interruption
++;
175 return kvm_s390_inject_program_int(vcpu
, vcpu
->arch
.sie_block
->iprcc
);
178 static int handle_instruction_and_prog(struct kvm_vcpu
*vcpu
)
182 vcpu
->stat
.exit_instr_and_program
++;
183 rc
= handle_instruction(vcpu
);
184 rc2
= handle_prog(vcpu
);
187 vcpu
->arch
.sie_block
->icptcode
= 0x04;
193 static const intercept_handler_t intercept_funcs
[0x48 >> 2] = {
194 [0x00 >> 2] = handle_noop
,
195 [0x04 >> 2] = handle_instruction
,
196 [0x08 >> 2] = handle_prog
,
197 [0x0C >> 2] = handle_instruction_and_prog
,
198 [0x10 >> 2] = handle_noop
,
199 [0x14 >> 2] = handle_noop
,
200 [0x1C >> 2] = kvm_s390_handle_wait
,
201 [0x20 >> 2] = handle_validity
,
202 [0x28 >> 2] = handle_stop
,
205 int kvm_handle_sie_intercept(struct kvm_vcpu
*vcpu
)
207 intercept_handler_t func
;
208 u8 code
= vcpu
->arch
.sie_block
->icptcode
;
210 if (code
& 3 || code
> 0x48)
212 func
= intercept_funcs
[code
>> 2];