From mboxrd@z Thu Jan 1 00:00:00 1970 From: andre.przywara@arm.com (Andre Przywara) Date: Fri, 13 Mar 2015 16:10:09 +0000 Subject: [PATCH 09/12] KVM: arm/arm64: prepare GICv2 emulation to be handled by kvm_io_bus In-Reply-To: <1426263012-22935-1-git-send-email-andre.przywara@arm.com> References: <1426263012-22935-1-git-send-email-andre.przywara@arm.com> Message-ID: <1426263012-22935-10-git-send-email-andre.przywara@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Using the framework provided by the recent vgic.c changes we register a kvm_io_bus device when initializing the virtual GICv2. Signed-off-by: Andre Przywara --- include/kvm/arm_vgic.h | 1 + virt/kvm/arm/vgic-v2-emul.c | 13 +++++++++---- virt/kvm/arm/vgic.c | 16 ++++++++++++++++ 3 files changed, 26 insertions(+), 4 deletions(-) diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 4bfc6a3..74a4ac4 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -245,6 +245,7 @@ struct vgic_dist { unsigned long *irq_pending_on_cpu; struct vgic_vm_ops vm_ops; + struct vgic_io_device dist_iodev; }; struct vgic_v2_cpu_if { diff --git a/virt/kvm/arm/vgic-v2-emul.c b/virt/kvm/arm/vgic-v2-emul.c index 0defac6..6f685c9 100644 --- a/virt/kvm/arm/vgic-v2-emul.c +++ b/virt/kvm/arm/vgic-v2-emul.c @@ -490,6 +490,7 @@ static bool vgic_v2_queue_sgi(struct kvm_vcpu *vcpu, int irq) static int vgic_v2_map_resources(struct kvm *kvm, const struct vgic_params *params) { + struct vgic_dist *dist = &kvm->arch.vgic; int ret = 0; if (!irqchip_in_kernel(kvm)) @@ -500,13 +501,17 @@ static int vgic_v2_map_resources(struct kvm *kvm, if (vgic_ready(kvm)) goto out; - if (IS_VGIC_ADDR_UNDEF(kvm->arch.vgic.vgic_dist_base) || - IS_VGIC_ADDR_UNDEF(kvm->arch.vgic.vgic_cpu_base)) { + if (IS_VGIC_ADDR_UNDEF(dist->vgic_dist_base) || + IS_VGIC_ADDR_UNDEF(dist->vgic_cpu_base)) { kvm_err("Need to set vgic cpu and dist addresses first\n"); ret = -ENXIO; goto out; } + vgic_register_kvm_io_dev(kvm, dist->vgic_dist_base, + KVM_VGIC_V2_DIST_SIZE, + vgic_dist_ranges, -1, &dist->dist_iodev); + /* * Initialize the vgic if this hasn't already been done on demand by * accessing the vgic state from userspace. @@ -517,7 +522,7 @@ static int vgic_v2_map_resources(struct kvm *kvm, goto out; } - ret = kvm_phys_addr_ioremap(kvm, kvm->arch.vgic.vgic_cpu_base, + ret = kvm_phys_addr_ioremap(kvm, dist->vgic_cpu_base, params->vcpu_base, KVM_VGIC_V2_CPU_SIZE, true); if (ret) { @@ -525,7 +530,7 @@ static int vgic_v2_map_resources(struct kvm *kvm, goto out; } - kvm->arch.vgic.ready = true; + dist->ready = true; out: if (ret) kvm_vgic_destroy(kvm); diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 71389b8..b1dd717 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -908,6 +908,20 @@ int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base, int len, return 0; } +static void vgic_unregister_kvm_io_dev(struct kvm *kvm) +{ + struct vgic_dist *dist = &kvm->arch.vgic; + + if (!dist || !kvm->buses[KVM_MMIO_BUS]) + return; + + mutex_lock(&kvm->slots_lock); + if (dist->dist_iodev.dev.ops) + kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, + &dist->dist_iodev.dev); + mutex_unlock(&kvm->slots_lock); +} + static int vgic_nr_shared_irqs(struct vgic_dist *dist) { return dist->nr_irqs - VGIC_NR_PRIVATE_IRQS; @@ -1546,6 +1560,8 @@ void kvm_vgic_destroy(struct kvm *kvm) struct kvm_vcpu *vcpu; int i; + vgic_unregister_kvm_io_dev(kvm); + kvm_for_each_vcpu(i, vcpu, kvm) kvm_vgic_vcpu_destroy(vcpu); -- 1.7.9.5