From 8f6cdc1c2eec20c3bbf3a83ad0e1db165f709917 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Fri, 15 Jul 2016 12:43:22 +0100 Subject: KVM: arm/arm64: vgic: Move redistributor kvm_io_devices Logically a GICv3 redistributor is assigned to a (v)CPU, so we should aim to keep redistributor related variables out of our struct vgic_dist. Let's start by replacing the redistributor related kvm_io_device array with two members in our existing struct vgic_cpu, which are naturally per-VCPU and thus don't require any allocation / freeing. So apart from the better fit with the redistributor design this saves some code as well. Signed-off-by: Andre Przywara Reviewed-by: Eric Auger Reviewed-by: Marc Zyngier Tested-by: Eric Auger Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-init.c | 1 - virt/kvm/arm/vgic/vgic-mmio-v3.c | 22 ++++++++-------------- 2 files changed, 8 insertions(+), 15 deletions(-) (limited to 'virt') diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index a1442f7c9c4d..90cae489c34c 100644 --- a/virt/kvm/arm/vgic/vgic-init.c +++ b/virt/kvm/arm/vgic/vgic-init.c @@ -271,7 +271,6 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm) dist->initialized = false; kfree(dist->spis); - kfree(dist->redist_iodevs); dist->nr_spis = 0; mutex_unlock(&kvm->lock); diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c index a0c515a412a7..fc7b6c97acbb 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c @@ -285,21 +285,14 @@ unsigned int vgic_v3_init_dist_iodev(struct vgic_io_device *dev) int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t redist_base_address) { - int nr_vcpus = atomic_read(&kvm->online_vcpus); struct kvm_vcpu *vcpu; - struct vgic_io_device *devices; int c, ret = 0; - devices = kmalloc(sizeof(struct vgic_io_device) * nr_vcpus * 2, - GFP_KERNEL); - if (!devices) - return -ENOMEM; - kvm_for_each_vcpu(c, vcpu, kvm) { gpa_t rd_base = redist_base_address + c * SZ_64K * 2; gpa_t sgi_base = rd_base + SZ_64K; - struct vgic_io_device *rd_dev = &devices[c * 2]; - struct vgic_io_device *sgi_dev = &devices[c * 2 + 1]; + struct vgic_io_device *rd_dev = &vcpu->arch.vgic_cpu.rd_iodev; + struct vgic_io_device *sgi_dev = &vcpu->arch.vgic_cpu.sgi_iodev; kvm_iodevice_init(&rd_dev->dev, &kvm_io_gic_ops); rd_dev->base_addr = rd_base; @@ -335,14 +328,15 @@ int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t redist_base_address) if (ret) { /* The current c failed, so we start with the previous one. */ for (c--; c >= 0; c--) { + struct vgic_cpu *vgic_cpu; + + vcpu = kvm_get_vcpu(kvm, c); + vgic_cpu = &vcpu->arch.vgic_cpu; kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, - &devices[c * 2].dev); + &vgic_cpu->rd_iodev.dev); kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, - &devices[c * 2 + 1].dev); + &vgic_cpu->sgi_iodev.dev); } - kfree(devices); - } else { - kvm->arch.vgic.redist_iodevs = devices; } return ret; -- cgit v1.2.3