68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
|
|
* diag.c - handling diagnose instructions
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (version 2 only)
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* Author(s): Carsten Otte <cotte@de.ibm.com>
|
|
* Christian Borntraeger <borntraeger@de.ibm.com>
|
|
*/
|
|
|
|
#include <linux/kvm.h>
|
|
#include <linux/kvm_host.h>
|
|
#include "kvm-s390.h"
|
|
|
|
static int __diag_time_slice_end(struct kvm_vcpu *vcpu)
|
|
{
|
|
VCPU_EVENT(vcpu, 5, "%s", "diag time slice end");
|
|
vcpu->stat.diagnose_44++;
|
|
vcpu_put(vcpu);
|
|
schedule();
|
|
vcpu_load(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned int reg = vcpu->arch.sie_block->ipa & 0xf;
|
|
unsigned long subcode = vcpu->arch.guest_gprs[reg] & 0xffff;
|
|
|
|
VCPU_EVENT(vcpu, 5, "diag ipl functions, subcode %lx", subcode);
|
|
switch (subcode) {
|
|
case 3:
|
|
vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;
|
|
break;
|
|
case 4:
|
|
vcpu->run->s390_reset_flags = 0;
|
|
break;
|
|
default:
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
|
|
vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM;
|
|
vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;
|
|
vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;
|
|
vcpu->run->exit_reason = KVM_EXIT_S390_RESET;
|
|
VCPU_EVENT(vcpu, 3, "requesting userspace resets %lx",
|
|
vcpu->run->s390_reset_flags);
|
|
return -EREMOTE;
|
|
}
|
|
|
|
int kvm_s390_handle_diag(struct kvm_vcpu *vcpu)
|
|
{
|
|
int code = (vcpu->arch.sie_block->ipb & 0xfff0000) >> 16;
|
|
|
|
switch (code) {
|
|
case 0x44:
|
|
return __diag_time_slice_end(vcpu);
|
|
case 0x308:
|
|
return __diag_ipl_functions(vcpu);
|
|
default:
|
|
return -ENOTSUPP;
|
|
}
|
|
}
|