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 [0xae] = kvm_s390_handle_sigp,
99 [0xb2] = kvm_s390_handle_priv,
100 [0xb7] = handle_lctl,
101 [0xeb] = handle_lctg,
104 static int handle_noop(struct kvm_vcpu *vcpu)
106 switch (vcpu->arch.sie_block->icptcode) {
108 vcpu->stat.exit_external_request++;
111 vcpu->stat.exit_external_interrupt++;
119 static int handle_stop(struct kvm_vcpu *vcpu)
123 vcpu->stat.exit_stop_request++;
124 atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
125 spin_lock_bh(&vcpu->arch.local_int.lock);
126 if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
127 vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
128 rc = __kvm_s390_vcpu_store_status(vcpu,
129 KVM_S390_STORE_STATUS_NOADDR);
134 if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) {
135 vcpu->arch.local_int.action_bits &= ~ACTION_STOP_ON_STOP;
136 VCPU_EVENT(vcpu, 3, "%s", "cpu stopped");
140 spin_unlock_bh(&vcpu->arch.local_int.lock);
144 static int handle_validity(struct kvm_vcpu *vcpu)
146 int viwhy = vcpu->arch.sie_block->ipb >> 16;
147 vcpu->stat.exit_validity++;
149 fault_in_pages_writeable((char __user *)
150 vcpu->kvm->arch.guest_origin +
151 vcpu->arch.sie_block->prefix,
155 VCPU_EVENT(vcpu, 2, "unhandled validity intercept code %d",
160 static int handle_instruction(struct kvm_vcpu *vcpu)
162 intercept_handler_t handler;
164 vcpu->stat.exit_instruction++;
165 handler = instruction_handlers[vcpu->arch.sie_block->ipa >> 8];
167 return handler(vcpu);
171 static int handle_prog(struct kvm_vcpu *vcpu)
173 vcpu->stat.exit_program_interruption++;
174 return kvm_s390_inject_program_int(vcpu, vcpu->arch.sie_block->iprcc);
177 static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
181 vcpu->stat.exit_instr_and_program++;
182 rc = handle_instruction(vcpu);
183 rc2 = handle_prog(vcpu);
186 vcpu->arch.sie_block->icptcode = 0x04;
192 static const intercept_handler_t intercept_funcs[0x48 >> 2] = {
193 [0x00 >> 2] = handle_noop,
194 [0x04 >> 2] = handle_instruction,
195 [0x08 >> 2] = handle_prog,
196 [0x0C >> 2] = handle_instruction_and_prog,
197 [0x10 >> 2] = handle_noop,
198 [0x14 >> 2] = handle_noop,
199 [0x1C >> 2] = kvm_s390_handle_wait,
200 [0x20 >> 2] = handle_validity,
201 [0x28 >> 2] = handle_stop,
204 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
206 intercept_handler_t func;
207 u8 code = vcpu->arch.sie_block->icptcode;
209 if (code & 3 || code > 0x48)
211 func = intercept_funcs[code >> 2];