From 6308630bd3dbb6a8a883c4c571ce5e5a759a8a0e Mon Sep 17 00:00:00 2001 From: Andrey Smetanin Date: Tue, 10 Nov 2015 15:36:32 +0300 Subject: 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 Reviewed-by: Roman Kagan Signed-off-by: Denis V. Lunev CC: Gleb Natapov CC: Paolo Bonzini CC: Roman Kagan CC: Denis V. Lunev CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/kvm_host.h | 4 ++-- arch/x86/kvm/ioapic.c | 4 ++-- arch/x86/kvm/ioapic.h | 7 ++++--- arch/x86/kvm/irq_comm.c | 5 +++-- arch/x86/kvm/lapic.c | 2 +- arch/x86/kvm/svm.c | 2 +- arch/x86/kvm/vmx.c | 3 +-- arch/x86/kvm/x86.c | 11 ++++++----- 8 files changed, 20 insertions(+), 18 deletions(-) (limited to 'arch') 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); diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c index 88d0a92d3f94..1facfd60b04a 100644 --- a/arch/x86/kvm/ioapic.c +++ b/arch/x86/kvm/ioapic.c @@ -233,7 +233,7 @@ static void kvm_ioapic_inject_all(struct kvm_ioapic *ioapic, unsigned long irr) } -void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) +void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors) { struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic; union kvm_ioapic_redirect_entry *e; @@ -250,7 +250,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) (e->fields.trig_mode == IOAPIC_EDGE_TRIG && kvm_apic_pending_eoi(vcpu, e->fields.vector))) __set_bit(e->fields.vector, - (unsigned long *)eoi_exit_bitmap); + ioapic_handled_vectors); } } spin_unlock(&ioapic->lock); diff --git a/arch/x86/kvm/ioapic.h b/arch/x86/kvm/ioapic.h index 084617d37c74..2d16dc251d81 100644 --- a/arch/x86/kvm/ioapic.h +++ b/arch/x86/kvm/ioapic.h @@ -121,7 +121,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, struct kvm_lapic_irq *irq, unsigned long *dest_map); int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); -void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); -void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); - +void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, + ulong *ioapic_handled_vectors); +void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, + ulong *ioapic_handled_vectors); #endif diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c index e39768ca8285..ece901c29351 100644 --- a/arch/x86/kvm/irq_comm.c +++ b/arch/x86/kvm/irq_comm.c @@ -339,7 +339,8 @@ void kvm_arch_post_irq_routing_update(struct kvm *kvm) kvm_make_scan_ioapic_request(kvm); } -void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) +void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, + ulong *ioapic_handled_vectors) { struct kvm *kvm = vcpu->kvm; struct kvm_kernel_irq_routing_entry *entry; @@ -369,7 +370,7 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) u32 vector = entry->msi.data & 0xff; __set_bit(vector, - (unsigned long *) eoi_exit_bitmap); + ioapic_handled_vectors); } } } diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 4d30b865be30..9469d453abc8 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -932,7 +932,7 @@ int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2) static bool kvm_ioapic_handles_vector(struct kvm_lapic *apic, int vector) { - return test_bit(vector, (ulong *)apic->vcpu->arch.eoi_exit_bitmap); + return test_bit(vector, apic->vcpu->arch.ioapic_handled_vectors); } static void kvm_ioapic_send_eoi(struct kvm_lapic *apic, int vector) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 83a1c643f9a5..ebb76e8a91e1 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3564,7 +3564,7 @@ static int svm_cpu_uses_apicv(struct kvm_vcpu *vcpu) return 0; } -static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu) +static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) { return; } diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index af823a388c19..c8a87c94dc81 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -8257,9 +8257,8 @@ static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr) } } -static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu) +static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) { - u64 *eoi_exit_bitmap = vcpu->arch.eoi_exit_bitmap; if (!vmx_cpu_uses_apicv(vcpu)) return; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index eed32283d22c..9c69337a3d61 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6301,15 +6301,16 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) if (!kvm_apic_hw_enabled(vcpu->arch.apic)) return; - memset(vcpu->arch.eoi_exit_bitmap, 0, 256 / 8); + bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); if (irqchip_split(vcpu->kvm)) - kvm_scan_ioapic_routes(vcpu, vcpu->arch.eoi_exit_bitmap); + kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); else { kvm_x86_ops->sync_pir_to_irr(vcpu); - kvm_ioapic_scan_entry(vcpu, vcpu->arch.eoi_exit_bitmap); + kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); } - kvm_x86_ops->load_eoi_exitmap(vcpu); + kvm_x86_ops->load_eoi_exitmap(vcpu, + (u64 *)vcpu->arch.ioapic_handled_vectors); } static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu) @@ -6417,7 +6418,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); if (test_bit(vcpu->arch.pending_ioapic_eoi, - (void *) vcpu->arch.eoi_exit_bitmap)) { + vcpu->arch.ioapic_handled_vectors)) { vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; vcpu->run->eoi.vector = vcpu->arch.pending_ioapic_eoi; -- cgit v1.2.3