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s390x/flic: introduce inject_airq callback

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Let's introduce a specialized way to inject adapter interrupts that,
unlike the common interrupt injection method, allows to take the
characteristics of the adapter into account.

For adapters subject to AIS facility:
- for non-kvm case, we handle the suppression for a given ISC in QEMU.
- for kvm case, we pass adapter id to kvm to do airq injection.

Add add tracepoint for suppressed airq and suppressing airq.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Signed-off-by: Fei Li <sherrylf@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Yi Min Zhao 2017-02-17 15:00:59 +08:00 • committed by Christian Borntraeger
parent 6c1dd652a6
commit 1622ffd515
4 changed files with 51 additions and 0 deletions
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18
hw/intc/s390_flic_kvm.c
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@ -170,6 +170,23 @@ static int kvm_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc,
return ioctl(flic->fd, KVM_SET_DEVICE_ATTR, &attr) ? -errno : 0;
}
static int kvm_s390_inject_airq(S390FLICState *fs, uint8_t type,
uint8_t isc, uint8_t flags)
{
KVMS390FLICState *flic = KVM_S390_FLIC(fs);
uint32_t id = css_get_adapter_id(type, isc);
struct kvm_device_attr attr = {
.group = KVM_DEV_FLIC_AIRQ_INJECT,
.attr = id,
};
if (!fs->ais_supported) {
return -ENOSYS;
}
return ioctl(flic->fd, KVM_SET_DEVICE_ATTR, &attr) ? -errno : 0;
}
/**
* __get_all_irqs - store all pending irqs in buffer
* @flic: pointer to flic device state
@ -515,6 +532,7 @@ static void kvm_s390_flic_class_init(ObjectClass *oc, void *data)
fsc->release_adapter_routes = kvm_s390_release_adapter_routes;
fsc->clear_io_irq = kvm_s390_clear_io_flic;
fsc->modify_ais_mode = kvm_s390_modify_ais_mode;
fsc->inject_airq = kvm_s390_inject_airq;
}
static const TypeInfo kvm_s390_flic_info = {