[PATCH 7/9] kvm/x86: split ioapic-handled and EOI exit bitmaps
flat view
STALE4023d
REVIEWED: 1 (0M)
From: Denis V. Lunev <hidden>
Date: 2015-10-16 07:07:51
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Revision v2 of 2 in this series; 1 review trailer.
Revisions (2)
- v2 current
- v2
From: Andrey Smetanin <redacted> 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 <redacted> Reviewed-by: Roman Kagan <redacted> Signed-off-by: Denis V. Lunev <redacted> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: "K. Y. Srinivasan" <redacted> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> --- 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 | 6 +++--- arch/x86/kvm/lapic.c | 2 +- arch/x86/kvm/svm.c | 2 +- arch/x86/kvm/vmx.c | 3 +-- arch/x86/kvm/x86.c | 12 +++++++----- 8 files changed, 21 insertions(+), 19 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 53deb27..07f7cd7 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;
@@ -833,7 +833,7 @@ 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 2dcda0f..3cf7a9c 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;
@@ -248,7 +248,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) if (kvm_apic_match_dest(vcpu, NULL, 0, e->fields.dest_id, e->fields.dest_mode)) __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 084617d..2d16dc2 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 6f922c2..fe91f72 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c@@ -371,7 +371,8 @@ 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;
@@ -398,8 +399,7 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) dest_mode)) { u32 vector = entry->msi.data & 0xff; - __set_bit(vector, - (unsigned long *) eoi_exit_bitmap); + __set_bit(vector, ioapic_handled_vectors); } } }
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 944b38a..dc03a01 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c@@ -930,7 +930,7 @@ 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 54a8618..03ccb78 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c@@ -3651,7 +3651,7 @@ 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 8eeba6a..fccf39c 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c@@ -8179,9 +8179,8 @@ 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 bcbc9234..668a1c4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c@@ -6198,13 +6198,15 @@ 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_ioapic_scan_entry(vcpu, vcpu->arch.eoi_exit_bitmap); - kvm_x86_ops->load_eoi_exitmap(vcpu); + kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); + + kvm_x86_ops->load_eoi_exitmap(vcpu, + (u64 *)vcpu->arch.ioapic_handled_vectors); } static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu)
@@ -6310,7 +6312,7 @@ 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;
--
2.1.4