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Groups > linux.kernel > #1700254
| From | Marc Zyngier <marc.zyngier@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v3 51/59] KVM: arm/arm64: GICv4: Add doorbell interrupt handling |
| Date | 2017-07-31 19:40 +0200 |
| Message-ID | <u9mPE-H2-29@gated-at.bofh.it> (permalink) |
| References | <u9mFX-DO-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When a vPE is not running, a VLPI being made pending results in a
doorbell interrupt being delivered. Let's handle this interrupt
and update the pending_last flag that indicates that VLPIs are
pending. The corresponding vcpu is also kicked into action.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
virt/kvm/arm/vgic/vgic-v4.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/virt/kvm/arm/vgic/vgic-v4.c b/virt/kvm/arm/vgic/vgic-v4.c
index 534d3051a078..6af3cde6d7d4 100644
--- a/virt/kvm/arm/vgic/vgic-v4.c
+++ b/virt/kvm/arm/vgic/vgic-v4.c
@@ -21,6 +21,19 @@
#include "vgic.h"
+static irqreturn_t vgic_v4_doorbell_handler(int irq, void *info)
+{
+ struct kvm_vcpu *vcpu = info;
+
+ if (!kvm_vgic_vcpu_pending_irq(vcpu)) {
+ vcpu->arch.vgic_cpu.vgic_v3.its_vpe.pending_last = true;
+ kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu);
+ kvm_vcpu_kick(vcpu);
+ }
+
+ return IRQ_HANDLED;
+}
+
int vgic_v4_init(struct kvm *kvm)
{
struct vgic_dist *dist = &kvm->arch.vgic;
@@ -57,16 +70,37 @@ int vgic_v4_init(struct kvm *kvm)
return ret;
}
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ int irq = dist->its_vm.vpes[i]->irq;
+
+ ret = request_irq(irq, vgic_v4_doorbell_handler,
+ 0, "vcpu", vcpu);
+ if (ret) {
+ kvm_err("failed to allocate vcpu IRQ%d\n", irq);
+ dist->its_vm.nr_vpes = i;
+ break;
+ }
+ }
+
+ if (ret)
+ vgic_v4_teardown(kvm);
+
return ret;
}
void vgic_v4_teardown(struct kvm *kvm)
{
struct its_vm *its_vm = &kvm->arch.vgic.its_vm;
+ int i;
if (!its_vm->vpes)
return;
+ for (i = 0; i < its_vm->nr_vpes; i++) {
+ struct kvm_vcpu *vcpu = kvm_get_vcpu(kvm, i);
+ free_irq(its_vm->vpes[i]->irq, vcpu);
+ }
+
its_free_vcpu_irqs(its_vm);
kfree(its_vm->vpes);
its_vm->nr_vpes = 0;
--
2.11.0
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[PATCH v3 00/59] irqchip: KVM: Add support for GICv4 Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 10/59] irqchip/gic-v3-its: Split out pending table allocation Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 37/59] KVM: arm/arm64: vgic: Move kvm_vgic_destroy call around Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 12/59] irqchip/gic-v3-its: Generalize device table allocation Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 55/59] KVM: arm/arm64: GICv4: Enable VLPI support Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 14/59] irqchip/gic-v4: Add management structure definitions Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 54/59] KVM: arm/arm64: GICv4: Enable virtual cpuif if VLPIs can be delivered Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 45/59] KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPI Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 49/59] KVM: arm/arm64: GICv4: Propagate VLPI properties at map time Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 59/59] irqchip/gic-v3-its: Workaround Huawei D05 redistributor addressing Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 47/59] KVM: arm/arm64: GICv4: Propagate property updates to VLPIs Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 05/59] irqchip/gic-v3-its: Add probing for VLPI properties Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 29/59] irqchip/gic-v3-its: Set implementation defined bit to enable VLPIs Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 33/59] irqchip/gic-v4: Add some basic documentation Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 35/59] irqchip/gic-v3: Advertise GICv4 support to KVM Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 41/59] KVM: arm/arm64: GICv4: Wire mapping/unmapping of VLPIs in VFIO irq bypass Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 58/59] irqchip/gic-v3-its: Pass its_node pointer to each command bulder Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 39/59] KVM: arm/arm64: GICv4: Add property field and per-VM predicate Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 43/59] KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 31/59] irqchip/gic-v4: Add VPE command interface Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 24/59] irqchip/gic-v3-its: Add VPE invalidation hook Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 19/59] irqchip/gic-v3-its: Add VPE domain infrastructure Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 40/59] KVM: arm/arm64: GICv4: Add init/teardown of the per-VM vPE irq domain Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:30 +0200
[PATCH v3 52/59] KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking source Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 53/59] KVM: arm/arm64: GICv4: Hook vPE scheduling into vgic flush/sync Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 44/59] KVM: arm/arm64: GICv4: Handle MOVI applied to a VLPI Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 48/59] KVM: arm/arm64: GICv4: Handle INVALL applied to a vPE Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 51/59] KVM: arm/arm64: GICv4: Add doorbell interrupt handling Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
Re: [PATCH v3 51/59] KVM: arm/arm64: GICv4: Add doorbell interrupt handling Marc Zyngier <marc.zyngier@arm.com> - 2017-08-04 09:50 +0200
[PATCH v3 42/59] KVM: arm/arm64: GICv4: Handle INT command applied to a VLPI Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 46/59] KVM: arm/arm64: GICv4: Handle MOVALL applied to a vPE Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 56/59] KVM: arm/arm64: GICv4: Prevent heterogenous systems from using GICv4 Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 50/59] KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 57/59] KVM: arm/arm64: GICv4: Theory of operations Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 19:40 +0200
[PATCH v3 38/59] KVM: arm/arm64: vITS: Add MSI translation helpers Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 32/59] irqchip/gic-v4: Add VLPI configuration interface Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 08/59] irqchip/gic-v3-its: Split out property table allocation Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 30/59] irqchip/gic-v4: Add per-VM VPE domain creation Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 36/59] KVM: arm: Select ARM_GIC_V3 and ARM_GIC_V3_ITS Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 09/59] irqchip/gic-v3-its: Allow use of indirect VCPU tables Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 13/59] irqchip/gic-v3-its: Generalize LPI configuration Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 34/59] irqchip/gic-v4: Enable low-level GICv4 operations Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 22/59] irqchip/gic-v3-its: Add VPENDBASER/VPROPBASER accessors Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 15/59] irqchip/gic-v3-its: Add GICv4 ITS command definitions Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 27/59] irqchip/gic-v3-its: Support VPE doorbell invalidation even when !DirectLPI Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 26/59] irqchip/gic-v3-its: Add VPE interrupt masking Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 16/59] irqchip/gic-v3-its: Add VLPI configuration hook Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 28/59] irqchip/gic-v3-its: Allow doorbell interrupts to be injected/cleared Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 06/59] irqchip/gic-v3-its: Macro-ize its_send_single_command Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 25/59] irqchip/gic-v3-its: Add VPE affinity changes Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 17/59] irqchip/gic-v3-its: Add VLPI map/unmap operations Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 11/59] irqchip/gic-v3-its: Rework LPI freeing Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 20/59] irqchip/gic-v3-its: Add VPE irq domain allocation/teardown Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 18/59] irqchip/gic-v3-its: Add VLPI configuration handling Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 23/59] irqchip/gic-v3-its: Add VPE scheduling Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:00 +0200
[PATCH v3 02/59] irqchip/gic-v3: Add redistributor iterator Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:10 +0200
[PATCH v3 01/59] genirq: Let irq_set_vcpu_affinity() iterate over hierarchy Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:10 +0200
[PATCH v3 07/59] irqchip/gic-v3-its: Implement irq_set_irqchip_state for pending state Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:10 +0200
[PATCH v3 03/59] irqchip/gic-v3: Add VLPI/DirectLPI discovery Marc Zyngier <marc.zyngier@arm.com> - 2017-07-31 20:10 +0200
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