From: Marc Zyngier <maz@kernel.org> To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Jason Cooper <jason@lakedaemon.net>, Robert Richter <rrichter@marvell.com>, Thomas Gleixner <tglx@linutronix.de> Subject: [PATCH v4 11/20] irqchip/gic-v4.1: Add VSGI allocation/teardown Date: Fri, 14 Feb 2020 14:57:27 +0000 Message-ID: <20200214145736.18550-12-maz@kernel.org> (raw) In-Reply-To: <20200214145736.18550-1-maz@kernel.org> Allocate per-VPE SGIs when initializing the GIC-specific part of the VPE data structure. Signed-off-by: Marc Zyngier <maz@kernel.org> --- drivers/irqchip/irq-gic-v4.c | 68 +++++++++++++++++++++++++++++- include/linux/irqchip/arm-gic-v4.h | 2 + 2 files changed, 69 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c index 117ba6db023d..99b33f60ac63 100644 --- a/drivers/irqchip/irq-gic-v4.c +++ b/drivers/irqchip/irq-gic-v4.c @@ -92,6 +92,47 @@ static bool has_v4_1(void) return !!sgi_domain_ops; } +static int its_alloc_vcpu_sgis(struct its_vpe *vpe, int idx) +{ + char *name; + int sgi_base; + + if (!has_v4_1()) + return 0; + + name = kasprintf(GFP_KERNEL, "GICv4-sgi-%d", task_pid_nr(current)); + if (!name) + goto err; + + vpe->fwnode = irq_domain_alloc_named_id_fwnode(name, idx); + if (!vpe->fwnode) + goto err; + + kfree(name); + name = NULL; + + vpe->sgi_domain = irq_domain_create_linear(vpe->fwnode, 16, + sgi_domain_ops, vpe); + if (!vpe->sgi_domain) + goto err; + + sgi_base = __irq_domain_alloc_irqs(vpe->sgi_domain, -1, 16, + NUMA_NO_NODE, vpe, + false, NULL); + if (sgi_base <= 0) + goto err; + + return 0; + +err: + if (vpe->sgi_domain) + irq_domain_remove(vpe->sgi_domain); + if (vpe->fwnode) + irq_domain_free_fwnode(vpe->fwnode); + kfree(name); + return -ENOMEM; +} + int its_alloc_vcpu_irqs(struct its_vm *vm) { int vpe_base_irq, i; @@ -118,8 +159,13 @@ int its_alloc_vcpu_irqs(struct its_vm *vm) if (vpe_base_irq <= 0) goto err; - for (i = 0; i < vm->nr_vpes; i++) + for (i = 0; i < vm->nr_vpes; i++) { + int ret; vm->vpes[i]->irq = vpe_base_irq + i; + ret = its_alloc_vcpu_sgis(vm->vpes[i], i); + if (ret) + goto err; + } return 0; @@ -132,8 +178,28 @@ int its_alloc_vcpu_irqs(struct its_vm *vm) return -ENOMEM; } +static void its_free_sgi_irqs(struct its_vm *vm) +{ + int i; + + if (!has_v4_1()) + return; + + for (i = 0; i < vm->nr_vpes; i++) { + unsigned int irq = irq_find_mapping(vm->vpes[i]->sgi_domain, 0); + + if (WARN_ON(!irq)) + continue; + + irq_domain_free_irqs(irq, 16); + irq_domain_remove(vm->vpes[i]->sgi_domain); + irq_domain_free_fwnode(vm->vpes[i]->fwnode); + } +} + void its_free_vcpu_irqs(struct its_vm *vm) { + its_free_sgi_irqs(vm); irq_domain_free_irqs(vm->vpes[0]->irq, vm->nr_vpes); irq_domain_remove(vm->domain); irq_domain_free_fwnode(vm->fwnode); diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h index cca4198fa1d5..9fbd0418f569 100644 --- a/include/linux/irqchip/arm-gic-v4.h +++ b/include/linux/irqchip/arm-gic-v4.h @@ -49,6 +49,8 @@ struct its_vpe { }; /* GICv4.1 implementations */ struct { + struct fwnode_handle *fwnode; + struct irq_domain *sgi_domain; struct { u8 priority; bool enabled; -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
next prev parent reply index Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-02-14 14:57 [PATCH v4 00/20] irqchip/gic-v4: GICv4.1 architecture support Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 01/20] irqchip/gic-v4.1: Skip absent CPUs while iterating over redistributors Marc Zyngier 2020-02-17 9:11 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 02/20] irqchip/gic-v3: Use SGIs without active state if offered Marc Zyngier 2020-02-17 9:18 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 03/20] irqchip/gic-v4.1: Advertise support v4.1 to KVM Marc Zyngier 2020-02-17 9:09 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 04/20] irqchip/gic-v4.1: Map the ITS SGIR register page Marc Zyngier 2020-02-20 3:17 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 05/20] irqchip/gic-v4.1: Plumb skeletal VSGI irqchip Marc Zyngier 2020-02-20 3:21 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 06/20] irqchip/gic-v4.1: Add initial SGI configuration Marc Zyngier 2020-02-18 7:25 ` Zenghui Yu 2020-02-18 9:46 ` Marc Zyngier 2020-02-20 3:25 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 07/20] irqchip/gic-v4.1: Plumb mask/unmask SGI callbacks Marc Zyngier 2020-02-20 3:32 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 08/20] irqchip/gic-v4.1: Plumb get/set_irqchip_state " Marc Zyngier 2020-02-18 7:00 ` Zenghui Yu 2020-02-18 9:27 ` Marc Zyngier 2020-02-18 15:31 ` Marc Zyngier 2020-02-19 11:50 ` Zenghui Yu 2020-02-19 15:18 ` Zenghui Yu 2020-02-20 3:11 ` Zenghui Yu 2020-02-28 19:37 ` Marc Zyngier 2020-03-01 19:00 ` Marc Zyngier 2020-03-02 8:18 ` Zenghui Yu 2020-03-02 12:09 ` Marc Zyngier 2020-03-02 14:21 ` Bill Barrow 2020-02-14 14:57 ` [PATCH v4 09/20] irqchip/gic-v4.1: Plumb set_vcpu_affinity " Marc Zyngier 2020-02-20 3:37 ` Zenghui Yu 2020-02-28 19:00 ` Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 10/20] irqchip/gic-v4.1: Move doorbell management to the GICv4 abstraction layer Marc Zyngier 2020-02-14 14:57 ` Marc Zyngier [this message] 2020-02-14 14:57 ` [PATCH v4 12/20] irqchip/gic-v4.1: Add VSGI property setup Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 13/20] irqchip/gic-v4.1: Eagerly vmap vPEs Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 14/20] KVM: arm64: GICv4.1: Let doorbells be auto-enabled Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 15/20] KVM: arm64: GICv4.1: Add direct injection capability to SGI registers Marc Zyngier 2020-02-18 8:46 ` Zenghui Yu 2020-02-18 9:41 ` Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 16/20] KVM: arm64: GICv4.1: Allow SGIs to switch between HW and SW interrupts Marc Zyngier 2020-02-20 3:55 ` Zenghui Yu 2020-02-28 19:16 ` Marc Zyngier 2020-03-02 2:40 ` Zenghui Yu 2020-02-14 14:57 ` [PATCH v4 17/20] KVM: arm64: GICv4.1: Plumb SGI implementation selection in the distributor Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 18/20] KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 19/20] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs Marc Zyngier 2020-02-14 14:57 ` [PATCH v4 20/20] KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs Marc Zyngier
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