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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-07-29 11:43:18 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-01 16:06:23 +0300 |
| commit | 3bb345f387dd26beb097cf776e342bc0d96d805a (patch) | |
| tree | 39b5e7634f75136c0b8917211b04462d5831735d /arch/x86/kvm/ioapic.h | |
| parent | bdaffe1d93e7eddbcc71d074a5d49eba7fe1c765 (diff) | |
| download | linux-3bb345f387dd26beb097cf776e342bc0d96d805a.tar.xz | |
KVM: x86: store IOAPIC-handled vectors in each VCPU
We can reuse the algorithm that computes the EOI exit bitmap to figure
out which vectors are handled by the IOAPIC. The only difference
between the two is for edge-triggered interrupts other than IRQ8
that have no notifiers active; however, the IOAPIC does not have to
do anything special for these interrupts anyway.
This again limits the interactions between the IOAPIC and the LAPIC,
making it easier to move the former to userspace.
Inspired by a patch from Steve Rutherford.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/ioapic.h')
| -rw-r--r-- | arch/x86/kvm/ioapic.h | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/x86/kvm/ioapic.h b/arch/x86/kvm/ioapic.h index 3dbd0e2aac4e..bf36d66a1951 100644 --- a/arch/x86/kvm/ioapic.h +++ b/arch/x86/kvm/ioapic.h @@ -73,7 +73,6 @@ struct kvm_ioapic { struct kvm *kvm; void (*ack_notifier)(void *opaque, int irq); spinlock_t lock; - DECLARE_BITMAP(handled_vectors, 256); struct rtc_status rtc_status; struct delayed_work eoi_inject; u32 irq_eoi[IOAPIC_NUM_PINS]; @@ -98,13 +97,6 @@ static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm) return kvm->arch.vioapic; } -static inline bool kvm_ioapic_handles_vector(struct kvm *kvm, int vector) -{ - struct kvm_ioapic *ioapic = kvm->arch.vioapic; - smp_rmb(); - return test_bit(vector, ioapic->handled_vectors); -} - void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu); bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, int short_hand, unsigned int dest, int dest_mode); |