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KVM: s390: Add clock comparator and CPU timer IRQ injection

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Add an interface to inject clock comparator and CPU timer interrupts
into the guest. This is needed for handling the external interrupt
interception.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Thomas Huth
2014-03-26 16:11:54 +01:00
committed by Christian Borntraeger
parent fcc9aec3de
commit e029ae5b78
3 changed files with 36 additions and 0 deletions
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32
arch/s390/kvm/interrupt.c
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@@ -27,6 +27,8 @@
#define IOINT_CSSID_MASK 0x03fc0000
#define IOINT_AI_MASK 0x04000000
static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu);
static int is_ioint(u64 type)
{
return ((type & 0xfffe0000u) != 0xfffe0000u);
@@ -89,6 +91,14 @@ static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
return 1;
return 0;
case KVM_S390_INT_CLOCK_COMP:
return ckc_interrupts_enabled(vcpu);
case KVM_S390_INT_CPU_TIMER:
if (psw_extint_disabled(vcpu))
return 0;
if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
return 1;
return 0;
case KVM_S390_INT_SERVICE:
case KVM_S390_INT_PFAULT_INIT:
case KVM_S390_INT_PFAULT_DONE:
@@ -166,6 +176,8 @@ static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
case KVM_S390_INT_PFAULT_INIT:
case KVM_S390_INT_PFAULT_DONE:
case KVM_S390_INT_VIRTIO:
case KVM_S390_INT_CLOCK_COMP:
case KVM_S390_INT_CPU_TIMER:
if (psw_extint_disabled(vcpu))
__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
else
@@ -326,6 +338,24 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
&vcpu->arch.sie_block->gpsw,
sizeof(psw_t));
break;
case KVM_S390_INT_CLOCK_COMP:
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->ext.ext_params, 0);
deliver_ckc_interrupt(vcpu);
break;
case KVM_S390_INT_CPU_TIMER:
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->ext.ext_params, 0);
rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
(u16 *)__LC_EXT_INT_CODE);
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
&vcpu->arch.sie_block->gpsw,
sizeof(psw_t));
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
rc |= put_guest_lc(vcpu, inti->ext.ext_params,
(u32 *)__LC_EXT_PARAMS);
break;
case KVM_S390_INT_SERVICE:
VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
inti->ext.ext_params);
@@ -984,6 +1014,8 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
break;
case KVM_S390_SIGP_STOP:
case KVM_S390_RESTART:
case KVM_S390_INT_CLOCK_COMP:
case KVM_S390_INT_CPU_TIMER:
VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
inti->type = s390int->type;
break;