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s390x/kvm: use ioctl KVM_S390_IRQ for vcpu interrupts 

KVM_S390_INT uses only two parameter fields. This is not
enough to pass all required information for certain interrupts.

A new ioctl KVM_S390_IRQ is available which allows us to
inject all local interrupts as defined in the Principles of
Operation. It takes a struct kvm_s390_irq as a parameter
which can store interrupt payload data for all interrupts.

Let's use the new ioctl for injecting vcpu interrupts.

Tested-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Jens Freimann 2014-12-18 17:38:05 +01:00 committed by Cornelia Huck
parent fb846a094f
commit 1191c94963
1 changed files with 20 additions and 2 deletions
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22
target-s390x/kvm.c
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@ -124,6 +124,7 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
static int cap_sync_regs;
static int cap_async_pf;
static int cap_mem_op;
static int cap_s390_irq;
static void *legacy_s390_alloc(size_t size, uint64_t *align);
@ -249,6 +250,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
kvm_s390_enable_cmma(s);
@ -827,10 +829,9 @@ static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq,
return r;
}
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
static void inject_vcpu_irq_legacy(CPUState *cs, struct kvm_s390_irq *irq)
{
struct kvm_s390_interrupt kvmint = {};
CPUState *cs = CPU(cpu);
int r;
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
@ -846,6 +847,23 @@ void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
}
}
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
{
CPUState *cs = CPU(cpu);
int r;
if (cap_s390_irq) {
r = kvm_vcpu_ioctl(cs, KVM_S390_IRQ, irq);
if (!r) {
return;
}
error_report("KVM failed to inject interrupt %llx", irq->type);
exit(1);
}
inject_vcpu_irq_legacy(cs, irq);
}
static void __kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
{
struct kvm_s390_interrupt kvmint = {};