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authorJens Freimann <jfrei@linux.vnet.ibm.com>2014-11-24 17:13:46 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2015-03-31 21:07:31 +0200
commit816c7667ea97c61884e014cfeedaede5b67b0e58 (patch)
tree0be000b61900a44f9dabe81405b145cbb87b761d /virt/kvm/kvm_main.c
parent79e87a103de1eda0cb4d726cd8581798e2d38f3e (diff)
KVM: s390: migrate vcpu interrupt state
This patch adds support to migrate vcpu interrupts. Two new vcpu ioctls are added which get/set the complete status of pending interrupts in one go. The ioctls are marked as available with the new capability KVM_CAP_S390_IRQ_STATE. We can not use a ONEREG, as the number of pending local interrupts is not constant and depends on the number of CPUs. To retrieve the interrupt state we add an ioctl KVM_S390_GET_IRQ_STATE. Its input parameter is a pointer to a struct kvm_s390_irq_state which has a buffer and length. For all currently pending interrupts, we copy a struct kvm_s390_irq into the buffer and pass it to userspace. To store interrupt state into a buffer provided by userspace, we add an ioctl KVM_S390_SET_IRQ_STATE. It passes a struct kvm_s390_irq_state into the kernel and injects all interrupts contained in the buffer. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
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