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s390x/kvm: add alternative injection interface

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Add kvm_s390_{vcpu,floating}_interrupt, which offer the possibility
to inject interrupts with larger payloads (when a kvm backend becomes
available).

Moreover, kvm_s390_floating_interrupt() does no longer have the bogus
requirement for a vcpu.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck 2014-03-11 17:10:07 +01:00
parent 79afc36d91
commit 66ad0893f0
2 changed files with 88 additions and 0 deletions
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2
target-s390x/cpu.h
View File

@ -366,6 +366,8 @@ void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token);
void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm,
uint64_t parm64, int vm);
void kvm_s390_service_interrupt(S390CPU *cpu, uint32_t parm);
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq);
void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq);
#else
static inline void kvm_s390_reset_vcpu(S390CPU *cpu)
{

86
target-s390x/kvm.c
View File

@ -555,6 +555,92 @@ int kvm_arch_process_async_events(CPUState *cs)
return cs->halted;
}
static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq,
struct kvm_s390_interrupt *interrupt)
{
int r = 0;
interrupt->type = irq->type;
switch (irq->type) {
case KVM_S390_INT_VIRTIO:
interrupt->parm = irq->u.ext.ext_params;
/* fall through */
case KVM_S390_INT_PFAULT_INIT:
case KVM_S390_INT_PFAULT_DONE:
interrupt->parm64 = irq->u.ext.ext_params2;
break;
case KVM_S390_PROGRAM_INT:
interrupt->parm = irq->u.pgm.code;
break;
case KVM_S390_SIGP_SET_PREFIX:
interrupt->parm = irq->u.prefix.address;
break;
case KVM_S390_INT_SERVICE:
interrupt->parm = irq->u.ext.ext_params;
break;
case KVM_S390_MCHK:
interrupt->parm = irq->u.mchk.cr14;
interrupt->parm64 = irq->u.mchk.mcic;
break;
case KVM_S390_INT_EXTERNAL_CALL:
interrupt->parm = irq->u.extcall.code;
break;
case KVM_S390_INT_EMERGENCY:
interrupt->parm = irq->u.emerg.code;
break;
case KVM_S390_SIGP_STOP:
case KVM_S390_RESTART:
break; /* These types have no parameters */
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
interrupt->parm = irq->u.io.subchannel_id << 16;
interrupt->parm |= irq->u.io.subchannel_nr;
interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32;
interrupt->parm64 |= irq->u.io.io_int_word;
break;
default:
r = -EINVAL;
break;
}
return r;
}
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
{
struct kvm_s390_interrupt kvmint = {};
CPUState *cs = CPU(cpu);
int r;
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
if (r < 0) {
fprintf(stderr, "%s called with bogus interrupt\n", __func__);
exit(1);
}
r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
if (r < 0) {
fprintf(stderr, "KVM failed to inject interrupt\n");
exit(1);
}
}
void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
{
struct kvm_s390_interrupt kvmint = {};
int r;
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
if (r < 0) {
fprintf(stderr, "%s called with bogus interrupt\n", __func__);
exit(1);
}
r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint);
if (r < 0) {
fprintf(stderr, "KVM failed to inject interrupt\n");
exit(1);
}
}
void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm,
uint64_t parm64, int vm)
{