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authorGleb Natapov <gleb@redhat.com>2009-03-05 16:34:59 +0200
committerAvi Kivity <avi@redhat.com>2009-06-10 11:48:27 +0300
commite1035715ef8d3171e29f9c6aee6f40d57b3fead5 (patch)
tree1ead65420a4d1653692d0e4b66a4e4f7fcbef425 /arch/ia64/kvm
parent343f94fe4d16ec898da77720c03da9e09f8523d2 (diff)
downloadlinux-rt-e1035715ef8d3171e29f9c6aee6f40d57b3fead5.tar.gz
KVM: change the way how lowest priority vcpu is calculated
The new way does not require additional loop over vcpus to calculate the one with lowest priority as one is chosen during delivery bitmap construction. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/ia64/kvm')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c15
-rw-r--r--arch/ia64/kvm/lapic.h1
2 files changed, 3 insertions, 13 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 8eea9cba7b7c..1887a93a2bd5 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1836,20 +1836,9 @@ int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
return 0;
}
-struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
- unsigned long *bitmap)
+int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
{
- struct kvm_vcpu *lvcpu = kvm->vcpus[0];
- int i;
-
- for (i = 1; i < kvm->arch.online_vcpus; i++) {
- if (!kvm->vcpus[i])
- continue;
- if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp)
- lvcpu = kvm->vcpus[i];
- }
-
- return lvcpu;
+ return vcpu1->arch.xtp - vcpu2->arch.xtp;
}
int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
diff --git a/arch/ia64/kvm/lapic.h b/arch/ia64/kvm/lapic.h
index 31602e7338d7..e42109e6ca47 100644
--- a/arch/ia64/kvm/lapic.h
+++ b/arch/ia64/kvm/lapic.h
@@ -22,6 +22,7 @@ int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
int short_hand, int dest, int dest_mode);
+int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
bool kvm_apic_present(struct kvm_vcpu *vcpu);
int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 dmode, u8 trig);