kvm/x86: split ioapic-handled and EOI exit bitmaps

The function to determine if the vector is handled by ioapic used to
rely on the fact that only ioapic-handled vectors were set up to
cause vmexits when virtual apic was in use.

We're going to break this assumption when introducing Hyper-V
synthetic interrupts: they may need to cause vmexits too.

To achieve that, introduce a new bitmap dedicated specifically for
ioapic-handled vectors, and populate EOI exit bitmap from it for now.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 30cfd64295a0..f6d8894f25b4 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -400,7 +400,7 @@ struct kvm_vcpu_arch {
         u64 efer;
         u64 apic_base;
         struct kvm_lapic *apic;    /* kernel irqchip context */
-        u64 eoi_exit_bitmap[4];
+        DECLARE_BITMAP(ioapic_handled_vectors, 256);
         unsigned long apic_attention;
         int32_t apic_arb_prio;
         int mp_state;
@@ -834,7 +834,7 @@ struct kvm_x86_ops {
         int (*cpu_uses_apicv)(struct kvm_vcpu *vcpu);
         void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr);
         void (*hwapic_isr_update)(struct kvm *kvm, int isr);
-        void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu);
+        void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
         void (*set_virtual_x2apic_mode)(struct kvm_vcpu *vcpu, bool set);
         void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu, hpa_t hpa);
         void (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector);