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author | Jens Freimann <jfrei@linux.vnet.ibm.com> | 2014-11-24 17:13:46 +0100 |
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committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-03-31 21:07:31 +0200 |
commit | 816c7667ea97c61884e014cfeedaede5b67b0e58 (patch) | |
tree | 0be000b61900a44f9dabe81405b145cbb87b761d /virt/kvm | |
parent | 79e87a103de1eda0cb4d726cd8581798e2d38f3e (diff) | |
download | op-kernel-dev-816c7667ea97c61884e014cfeedaede5b67b0e58.zip op-kernel-dev-816c7667ea97c61884e014cfeedaede5b67b0e58.tar.gz |
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')
0 files changed, 0 insertions, 0 deletions