xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: s390: irq routing for adapter interrupts.

Browse Source 
Introduce a new interrupt class for s390 adapter interrupts and enable
irqfds for s390.

This is depending on a new s390 specific vm capability, KVM_CAP_S390_IRQCHIP,
that needs to be enabled by userspace.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck
2013-07-15 13:36:01 +02:00
parent 841b91c584
commit 8422359877
9 changed files with 209 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
arch/s390/kvm/kvm-s390.c
View File

@@ -196,6 +196,10 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
return -EINVAL;
switch (cap->cap) {
case KVM_CAP_S390_IRQCHIP:
kvm->arch.use_irqchip = 1;
r = 0;
break;
default:
r = -EINVAL;
break;
@@ -228,6 +232,18 @@ long kvm_arch_vm_ioctl(struct file *filp,
r = kvm_vm_ioctl_enable_cap(kvm, &cap);
break;
}
case KVM_CREATE_IRQCHIP: {
struct kvm_irq_routing_entry routing;
r = -EINVAL;
if (kvm->arch.use_irqchip) {
/* Set up dummy routing. */
memset(&routing, 0, sizeof(routing));
kvm_set_irq_routing(kvm, &routing, 0, 0);
r = 0;
}
break;
}
default:
r = -ENOTTY;
}
@@ -284,6 +300,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
}
kvm->arch.css_support = 0;
kvm->arch.use_irqchip = 0;
return 0;
out_nogmap: