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KVM: Accelerated apic support

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This adds a mechanism for exposing the virtual apic tpr to the guest, and a
protocol for letting the guest update the tpr without causing a vmexit if
conditions allow (e.g. there is no interrupt pending with a higher priority
than the new tpr).

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-10-25 16:52:32 +02:00
parent b209749f52
commit b93463aa59
5 changed files with 120 additions and 1 deletions
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7
include/linux/kvm.h
View file

@ -216,6 +216,11 @@ struct kvm_tpr_access_ctl {
__u32 reserved[8];
};
/* for KVM_SET_VAPIC_ADDR */
struct kvm_vapic_addr {
__u64 vapic_addr;
};
#define KVMIO 0xAE
/*
@ -291,5 +296,7 @@ struct kvm_tpr_access_ctl {
#define KVM_GET_CPUID2 _IOWR(KVMIO, 0x91, struct kvm_cpuid2)
/* Available with KVM_CAP_VAPIC */
#define KVM_TPR_ACCESS_REPORTING _IOWR(KVMIO, 0x92, struct kvm_tpr_access_ctl)
/* Available with KVM_CAP_VAPIC */
#define KVM_SET_VAPIC_ADDR _IOW(KVMIO, 0x93, struct kvm_vapic_addr)
#endif