forked from Minki/linux
8d26cf7b40
There are several places in the kvm module, which set the prefix register. Since we need to flush the cpu, lets combine this operation into a helper function. This helper will also explicitely mask out the unused bits. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
642 lines
17 KiB
C
642 lines
17 KiB
C
/*
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* interrupt.c - handling kvm guest interrupts
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*
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* Copyright IBM Corp. 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Carsten Otte <cotte@de.ibm.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/kvm_host.h>
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#include <linux/hrtimer.h>
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#include <linux/signal.h>
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#include <linux/slab.h>
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#include <asm/asm-offsets.h>
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#include <asm/uaccess.h>
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#include "kvm-s390.h"
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#include "gaccess.h"
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static int psw_extint_disabled(struct kvm_vcpu *vcpu)
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{
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
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}
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static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
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{
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if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
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(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
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(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
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return 0;
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return 1;
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}
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static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt_info *inti)
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{
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switch (inti->type) {
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case KVM_S390_INT_EXTERNAL_CALL:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
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return 1;
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case KVM_S390_INT_EMERGENCY:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
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return 1;
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return 0;
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case KVM_S390_INT_SERVICE:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
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return 1;
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return 0;
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case KVM_S390_INT_VIRTIO:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
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return 1;
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return 0;
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case KVM_S390_PROGRAM_INT:
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case KVM_S390_SIGP_STOP:
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case KVM_S390_SIGP_SET_PREFIX:
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case KVM_S390_RESTART:
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return 1;
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default:
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BUG();
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}
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return 0;
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}
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static void __set_cpu_idle(struct kvm_vcpu *vcpu)
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{
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BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
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atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
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set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
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}
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static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
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{
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BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
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atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
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clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
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}
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static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
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{
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atomic_clear_mask(CPUSTAT_ECALL_PEND |
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CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
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&vcpu->arch.sie_block->cpuflags);
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vcpu->arch.sie_block->lctl = 0x0000;
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}
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static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
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{
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atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
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}
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static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt_info *inti)
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{
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switch (inti->type) {
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case KVM_S390_INT_EXTERNAL_CALL:
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case KVM_S390_INT_EMERGENCY:
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case KVM_S390_INT_SERVICE:
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case KVM_S390_INT_VIRTIO:
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if (psw_extint_disabled(vcpu))
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__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
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else
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vcpu->arch.sie_block->lctl |= LCTL_CR0;
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break;
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case KVM_S390_SIGP_STOP:
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__set_cpuflag(vcpu, CPUSTAT_STOP_INT);
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break;
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default:
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BUG();
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}
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}
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static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt_info *inti)
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{
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const unsigned short table[] = { 2, 4, 4, 6 };
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int rc, exception = 0;
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switch (inti->type) {
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case KVM_S390_INT_EMERGENCY:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
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vcpu->stat.deliver_emergency_signal++;
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rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1201);
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, inti->emerg.code);
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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break;
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case KVM_S390_INT_EXTERNAL_CALL:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
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vcpu->stat.deliver_external_call++;
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rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1202);
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, inti->extcall.code);
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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break;
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case KVM_S390_INT_SERVICE:
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VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
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inti->ext.ext_params);
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vcpu->stat.deliver_service_signal++;
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rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2401);
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params);
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if (rc == -EFAULT)
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exception = 1;
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break;
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case KVM_S390_INT_VIRTIO:
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VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
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inti->ext.ext_params, inti->ext.ext_params2);
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vcpu->stat.deliver_virtio_interrupt++;
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rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603);
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, 0x0d00);
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params);
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u64(vcpu, __LC_EXT_PARAMS2,
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inti->ext.ext_params2);
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if (rc == -EFAULT)
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exception = 1;
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break;
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case KVM_S390_SIGP_STOP:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
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vcpu->stat.deliver_stop_signal++;
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__set_intercept_indicator(vcpu, inti);
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break;
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case KVM_S390_SIGP_SET_PREFIX:
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VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
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inti->prefix.address);
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vcpu->stat.deliver_prefix_signal++;
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kvm_s390_set_prefix(vcpu, inti->prefix.address);
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break;
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case KVM_S390_RESTART:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
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vcpu->stat.deliver_restart_signal++;
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rc = copy_to_guest(vcpu, offsetof(struct _lowcore,
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restart_old_psw), &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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offsetof(struct _lowcore, restart_psw), sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
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break;
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case KVM_S390_PROGRAM_INT:
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VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
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inti->pgm.code,
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table[vcpu->arch.sie_block->ipa >> 14]);
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vcpu->stat.deliver_program_int++;
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rc = put_guest_u16(vcpu, __LC_PGM_INT_CODE, inti->pgm.code);
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if (rc == -EFAULT)
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exception = 1;
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rc = put_guest_u16(vcpu, __LC_PGM_ILC,
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table[vcpu->arch.sie_block->ipa >> 14]);
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_to_guest(vcpu, __LC_PGM_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_PGM_NEW_PSW, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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break;
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default:
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BUG();
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}
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if (exception) {
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printk("kvm: The guest lowcore is not mapped during interrupt "
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"delivery, killing userspace\n");
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do_exit(SIGKILL);
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}
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}
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static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
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{
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int rc, exception = 0;
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if (psw_extint_disabled(vcpu))
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return 0;
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if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
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return 0;
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rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004);
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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if (rc == -EFAULT)
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exception = 1;
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if (exception) {
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printk("kvm: The guest lowcore is not mapped during interrupt "
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"delivery, killing userspace\n");
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do_exit(SIGKILL);
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}
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return 1;
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}
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static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
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{
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struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
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struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
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struct kvm_s390_interrupt_info *inti;
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int rc = 0;
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if (atomic_read(&li->active)) {
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spin_lock_bh(&li->lock);
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list_for_each_entry(inti, &li->list, list)
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if (__interrupt_is_deliverable(vcpu, inti)) {
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rc = 1;
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break;
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}
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spin_unlock_bh(&li->lock);
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}
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if ((!rc) && atomic_read(&fi->active)) {
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spin_lock(&fi->lock);
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list_for_each_entry(inti, &fi->list, list)
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if (__interrupt_is_deliverable(vcpu, inti)) {
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rc = 1;
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break;
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}
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spin_unlock(&fi->lock);
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}
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if ((!rc) && (vcpu->arch.sie_block->ckc <
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get_clock() + vcpu->arch.sie_block->epoch)) {
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if ((!psw_extint_disabled(vcpu)) &&
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(vcpu->arch.sie_block->gcr[0] & 0x800ul))
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rc = 1;
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}
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return rc;
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}
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int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
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{
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u64 now, sltime;
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DECLARE_WAITQUEUE(wait, current);
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vcpu->stat.exit_wait_state++;
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if (kvm_cpu_has_interrupt(vcpu))
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return 0;
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__set_cpu_idle(vcpu);
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spin_lock_bh(&vcpu->arch.local_int.lock);
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vcpu->arch.local_int.timer_due = 0;
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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if (psw_interrupts_disabled(vcpu)) {
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VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
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__unset_cpu_idle(vcpu);
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return -EOPNOTSUPP; /* disabled wait */
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}
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if (psw_extint_disabled(vcpu) ||
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(!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) {
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VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
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goto no_timer;
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}
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now = get_clock() + vcpu->arch.sie_block->epoch;
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if (vcpu->arch.sie_block->ckc < now) {
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__unset_cpu_idle(vcpu);
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return 0;
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}
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sltime = ((vcpu->arch.sie_block->ckc - now)*125)>>9;
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hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
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VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
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no_timer:
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spin_lock(&vcpu->arch.local_int.float_int->lock);
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spin_lock_bh(&vcpu->arch.local_int.lock);
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add_wait_queue(&vcpu->arch.local_int.wq, &wait);
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while (list_empty(&vcpu->arch.local_int.list) &&
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list_empty(&vcpu->arch.local_int.float_int->list) &&
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(!vcpu->arch.local_int.timer_due) &&
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!signal_pending(current)) {
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set_current_state(TASK_INTERRUPTIBLE);
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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spin_unlock(&vcpu->arch.local_int.float_int->lock);
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vcpu_put(vcpu);
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schedule();
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vcpu_load(vcpu);
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spin_lock(&vcpu->arch.local_int.float_int->lock);
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spin_lock_bh(&vcpu->arch.local_int.lock);
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}
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__unset_cpu_idle(vcpu);
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__set_current_state(TASK_RUNNING);
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remove_wait_queue(&vcpu->arch.local_int.wq, &wait);
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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spin_unlock(&vcpu->arch.local_int.float_int->lock);
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hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
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return 0;
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}
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void kvm_s390_tasklet(unsigned long parm)
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{
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struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm;
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spin_lock(&vcpu->arch.local_int.lock);
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vcpu->arch.local_int.timer_due = 1;
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if (waitqueue_active(&vcpu->arch.local_int.wq))
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wake_up_interruptible(&vcpu->arch.local_int.wq);
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spin_unlock(&vcpu->arch.local_int.lock);
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}
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/*
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* low level hrtimer wake routine. Because this runs in hardirq context
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* we schedule a tasklet to do the real work.
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*/
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enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
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{
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struct kvm_vcpu *vcpu;
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vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
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tasklet_schedule(&vcpu->arch.tasklet);
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return HRTIMER_NORESTART;
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}
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void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
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{
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struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
|
|
struct kvm_s390_interrupt_info *n, *inti = NULL;
|
|
int deliver;
|
|
|
|
__reset_intercept_indicators(vcpu);
|
|
if (atomic_read(&li->active)) {
|
|
do {
|
|
deliver = 0;
|
|
spin_lock_bh(&li->lock);
|
|
list_for_each_entry_safe(inti, n, &li->list, list) {
|
|
if (__interrupt_is_deliverable(vcpu, inti)) {
|
|
list_del(&inti->list);
|
|
deliver = 1;
|
|
break;
|
|
}
|
|
__set_intercept_indicator(vcpu, inti);
|
|
}
|
|
if (list_empty(&li->list))
|
|
atomic_set(&li->active, 0);
|
|
spin_unlock_bh(&li->lock);
|
|
if (deliver) {
|
|
__do_deliver_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (deliver);
|
|
}
|
|
|
|
if ((vcpu->arch.sie_block->ckc <
|
|
get_clock() + vcpu->arch.sie_block->epoch))
|
|
__try_deliver_ckc_interrupt(vcpu);
|
|
|
|
if (atomic_read(&fi->active)) {
|
|
do {
|
|
deliver = 0;
|
|
spin_lock(&fi->lock);
|
|
list_for_each_entry_safe(inti, n, &fi->list, list) {
|
|
if (__interrupt_is_deliverable(vcpu, inti)) {
|
|
list_del(&inti->list);
|
|
deliver = 1;
|
|
break;
|
|
}
|
|
__set_intercept_indicator(vcpu, inti);
|
|
}
|
|
if (list_empty(&fi->list))
|
|
atomic_set(&fi->active, 0);
|
|
spin_unlock(&fi->lock);
|
|
if (deliver) {
|
|
__do_deliver_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (deliver);
|
|
}
|
|
}
|
|
|
|
int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_interrupt_info *inti;
|
|
|
|
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
|
|
if (!inti)
|
|
return -ENOMEM;
|
|
|
|
inti->type = KVM_S390_PROGRAM_INT;
|
|
inti->pgm.code = code;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
|
|
spin_lock_bh(&li->lock);
|
|
list_add(&inti->list, &li->list);
|
|
atomic_set(&li->active, 1);
|
|
BUG_ON(waitqueue_active(&li->wq));
|
|
spin_unlock_bh(&li->lock);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_inject_vm(struct kvm *kvm,
|
|
struct kvm_s390_interrupt *s390int)
|
|
{
|
|
struct kvm_s390_local_interrupt *li;
|
|
struct kvm_s390_float_interrupt *fi;
|
|
struct kvm_s390_interrupt_info *inti;
|
|
int sigcpu;
|
|
|
|
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
|
|
if (!inti)
|
|
return -ENOMEM;
|
|
|
|
switch (s390int->type) {
|
|
case KVM_S390_INT_VIRTIO:
|
|
VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
|
|
s390int->parm, s390int->parm64);
|
|
inti->type = s390int->type;
|
|
inti->ext.ext_params = s390int->parm;
|
|
inti->ext.ext_params2 = s390int->parm64;
|
|
break;
|
|
case KVM_S390_INT_SERVICE:
|
|
VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
|
|
inti->type = s390int->type;
|
|
inti->ext.ext_params = s390int->parm;
|
|
break;
|
|
case KVM_S390_PROGRAM_INT:
|
|
case KVM_S390_SIGP_STOP:
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
case KVM_S390_INT_EMERGENCY:
|
|
default:
|
|
kfree(inti);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&kvm->lock);
|
|
fi = &kvm->arch.float_int;
|
|
spin_lock(&fi->lock);
|
|
list_add_tail(&inti->list, &fi->list);
|
|
atomic_set(&fi->active, 1);
|
|
sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
|
|
if (sigcpu == KVM_MAX_VCPUS) {
|
|
do {
|
|
sigcpu = fi->next_rr_cpu++;
|
|
if (sigcpu == KVM_MAX_VCPUS)
|
|
sigcpu = fi->next_rr_cpu = 0;
|
|
} while (fi->local_int[sigcpu] == NULL);
|
|
}
|
|
li = fi->local_int[sigcpu];
|
|
spin_lock_bh(&li->lock);
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
if (waitqueue_active(&li->wq))
|
|
wake_up_interruptible(&li->wq);
|
|
spin_unlock_bh(&li->lock);
|
|
spin_unlock(&fi->lock);
|
|
mutex_unlock(&kvm->lock);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt *s390int)
|
|
{
|
|
struct kvm_s390_local_interrupt *li;
|
|
struct kvm_s390_interrupt_info *inti;
|
|
|
|
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
|
|
if (!inti)
|
|
return -ENOMEM;
|
|
|
|
switch (s390int->type) {
|
|
case KVM_S390_PROGRAM_INT:
|
|
if (s390int->parm & 0xffff0000) {
|
|
kfree(inti);
|
|
return -EINVAL;
|
|
}
|
|
inti->type = s390int->type;
|
|
inti->pgm.code = s390int->parm;
|
|
VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
|
|
s390int->parm);
|
|
break;
|
|
case KVM_S390_SIGP_SET_PREFIX:
|
|
inti->prefix.address = s390int->parm;
|
|
inti->type = s390int->type;
|
|
VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
|
|
s390int->parm);
|
|
break;
|
|
case KVM_S390_SIGP_STOP:
|
|
case KVM_S390_RESTART:
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
case KVM_S390_INT_EMERGENCY:
|
|
VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
|
|
inti->type = s390int->type;
|
|
break;
|
|
case KVM_S390_INT_VIRTIO:
|
|
case KVM_S390_INT_SERVICE:
|
|
default:
|
|
kfree(inti);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&vcpu->kvm->lock);
|
|
li = &vcpu->arch.local_int;
|
|
spin_lock_bh(&li->lock);
|
|
if (inti->type == KVM_S390_PROGRAM_INT)
|
|
list_add(&inti->list, &li->list);
|
|
else
|
|
list_add_tail(&inti->list, &li->list);
|
|
atomic_set(&li->active, 1);
|
|
if (inti->type == KVM_S390_SIGP_STOP)
|
|
li->action_bits |= ACTION_STOP_ON_STOP;
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
if (waitqueue_active(&li->wq))
|
|
wake_up_interruptible(&vcpu->arch.local_int.wq);
|
|
spin_unlock_bh(&li->lock);
|
|
mutex_unlock(&vcpu->kvm->lock);
|
|
return 0;
|
|
}
|