From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Przywara Subject: [PATCH v6 01/15] KVM: arm/arm64: move redistributor kvm_io_devices Date: Fri, 17 Jun 2016 13:08:33 +0100 Message-ID: <1466165327-32060-2-git-send-email-andre.przywara@arm.com> References: <1466165327-32060-1-git-send-email-andre.przywara@arm.com> Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org To: Marc Zyngier , Christoffer Dall , Eric Auger Return-path: Received: from foss.arm.com ([217.140.101.70]:49645 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932504AbcFQMIn (ORCPT ); Fri, 17 Jun 2016 08:08:43 -0400 In-Reply-To: <1466165327-32060-1-git-send-email-andre.przywara@arm.com> Sender: kvm-owner@vger.kernel.org List-ID: 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 --- include/kvm/vgic/vgic.h | 8 +++++++- virt/kvm/arm/vgic/vgic-init.c | 1 - virt/kvm/arm/vgic/vgic-mmio-v3.c | 22 ++++++++-------------- 3 files changed, 15 insertions(+), 16 deletions(-) diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index 3fbd175..2f26f37 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -145,7 +145,6 @@ struct vgic_dist { struct vgic_irq *spis; struct vgic_io_device dist_iodev; - struct vgic_io_device *redist_iodevs; }; struct vgic_v2_cpu_if { @@ -193,6 +192,13 @@ struct vgic_cpu { struct list_head ap_list_head; u64 live_lrs; + + /* + * Members below are used with GICv3 emulation only and represent + * parts of the redistributor. + */ + struct vgic_io_device rd_iodev; + struct vgic_io_device sgi_iodev; }; int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write); diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index a1442f7..90cae48 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 a0c515a..fc7b6c9 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; -- 2.8.2 From mboxrd@z Thu Jan 1 00:00:00 1970 From: andre.przywara@arm.com (Andre Przywara) Date: Fri, 17 Jun 2016 13:08:33 +0100 Subject: [PATCH v6 01/15] KVM: arm/arm64: move redistributor kvm_io_devices In-Reply-To: <1466165327-32060-1-git-send-email-andre.przywara@arm.com> References: <1466165327-32060-1-git-send-email-andre.przywara@arm.com> Message-ID: <1466165327-32060-2-git-send-email-andre.przywara@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- include/kvm/vgic/vgic.h | 8 +++++++- virt/kvm/arm/vgic/vgic-init.c | 1 - virt/kvm/arm/vgic/vgic-mmio-v3.c | 22 ++++++++-------------- 3 files changed, 15 insertions(+), 16 deletions(-) diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index 3fbd175..2f26f37 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -145,7 +145,6 @@ struct vgic_dist { struct vgic_irq *spis; struct vgic_io_device dist_iodev; - struct vgic_io_device *redist_iodevs; }; struct vgic_v2_cpu_if { @@ -193,6 +192,13 @@ struct vgic_cpu { struct list_head ap_list_head; u64 live_lrs; + + /* + * Members below are used with GICv3 emulation only and represent + * parts of the redistributor. + */ + struct vgic_io_device rd_iodev; + struct vgic_io_device sgi_iodev; }; int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write); diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index a1442f7..90cae48 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 a0c515a..fc7b6c9 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; -- 2.8.2