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KVM: x86: Add KVM_GET/SET_VCPU_EVENTS

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This new IOCTL exports all yet user-invisible states related to
exceptions, interrupts, and NMIs. Together with appropriate user space
changes, this fixes sporadic problems of vmsave/restore, live migration
and system reset.

[avi: future-proof abi by adding a flags field]

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2009-11-12 01:04:25 +01:00 • committed by Avi Kivity
parent 65ac726404
commit 3cfc3092f4
7 changed files with 214 additions and 0 deletions
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6
include/linux/kvm.h
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@ -489,6 +489,9 @@ struct kvm_ioeventfd {
#endif
#define KVM_CAP_ADJUST_CLOCK 39
#define KVM_CAP_INTERNAL_ERROR_DATA 40
#ifdef __KVM_HAVE_VCPU_EVENTS
#define KVM_CAP_VCPU_EVENTS 41
#endif
#ifdef KVM_CAP_IRQ_ROUTING
@ -672,6 +675,9 @@ struct kvm_clock_data {
/* IA64 stack access */
#define KVM_IA64_VCPU_GET_STACK _IOR(KVMIO, 0x9a, void *)
#define KVM_IA64_VCPU_SET_STACK _IOW(KVMIO, 0x9b, void *)
/* Available with KVM_CAP_VCPU_EVENTS */
#define KVM_GET_VCPU_EVENTS _IOR(KVMIO, 0x9f, struct kvm_vcpu_events)
#define KVM_SET_VCPU_EVENTS _IOW(KVMIO, 0xa0, struct kvm_vcpu_events)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)