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From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.cs.columbia.edu, 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 v3 09/32] irqchip/gic-v4.1: Plumb skeletal VPE irqchip
Date: Tue, 24 Dec 2019 11:10:32 +0000
Message-ID: <20191224111055.11836-10-maz@kernel.org> (raw)
In-Reply-To: <20191224111055.11836-1-maz@kernel.org>

Just like for GICv4.0, each VPE has its own doorbell interrupt, and
thus an irqchip that manages them. Since the doorbell management is
quite different on GICv4.1, let's introduce an almost empty irqchip
the will get populated over the next new patches.

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/irqchip/irq-gic-v3-its.c | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index fd9d3b6bb465..157f51398850 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -3554,6 +3554,32 @@ static struct irq_chip its_vpe_irq_chip = {
 	.irq_set_vcpu_affinity	= its_vpe_set_vcpu_affinity,
 };
 
+static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
+{
+	struct its_cmd_info *info = vcpu_info;
+
+	switch (info->cmd_type) {
+	case SCHEDULE_VPE:
+		return 0;
+
+	case DESCHEDULE_VPE:
+		return 0;
+
+	case INVALL_VPE:
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static struct irq_chip its_vpe_4_1_irq_chip = {
+	.name			= "GICv4.1-vpe",
+	.irq_eoi		= irq_chip_eoi_parent,
+	.irq_set_affinity	= its_vpe_set_affinity,
+	.irq_set_vcpu_affinity	= its_vpe_4_1_set_vcpu_affinity,
+};
+
 static int its_vpe_id_alloc(void)
 {
 	return ida_simple_get(&its_vpeid_ida, 0, ITS_MAX_VPEID, GFP_KERNEL);
@@ -3634,6 +3660,7 @@ static void its_vpe_irq_domain_free(struct irq_domain *domain,
 static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
 				    unsigned int nr_irqs, void *args)
 {
+	struct irq_chip *irqchip = &its_vpe_irq_chip;
 	struct its_vm *vm = args;
 	unsigned long *bitmap;
 	struct page *vprop_page;
@@ -3661,6 +3688,9 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
 	vm->nr_db_lpis = nr_ids;
 	vm->vprop_page = vprop_page;
 
+	if (gic_rdists->has_rvpeid)
+		irqchip = &its_vpe_4_1_irq_chip;
+
 	for (i = 0; i < nr_irqs; i++) {
 		vm->vpes[i]->vpe_db_lpi = base + i;
 		err = its_vpe_init(vm->vpes[i]);
@@ -3671,7 +3701,7 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
 		if (err)
 			break;
 		irq_domain_set_hwirq_and_chip(domain, virq + i, i,
-					      &its_vpe_irq_chip, vm->vpes[i]);
+					      irqchip, vm->vpes[i]);
 		set_bit(i, bitmap);
 	}
 
-- 
2.20.1

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  parent reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-24 11:10 [PATCH v3 00/32] irqchip/gic-v4: GICv4.1 architecture support Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 01/32] irqchip/gic-v3: Detect GICv4.1 supporting RVPEID Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 02/32] irqchip/gic-v3: Add GICv4.1 VPEID size discovery Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 03/32] irqchip/gic-v3: Workaround Cavium TX1 erratum when reading GICD_TYPER2 Marc Zyngier
2020-03-09 22:11   ` Robert Richter
2020-03-10 11:41     ` Marc Zyngier
2020-03-10 12:34       ` Robert Richter
2020-03-11  8:45       ` Robert Richter
2020-03-11  9:03         ` Marc Zyngier
2020-03-11  9:18           ` Robert Richter
2019-12-24 11:10 ` [PATCH v3 04/32] irqchip/gic-v3: Use SGIs without active state if offered Marc Zyngier
2019-12-28  8:56   ` Zenghui Yu
2019-12-28 10:36     ` Marc Zyngier
2019-12-30  3:50       ` Zenghui Yu
2019-12-24 11:10 ` [PATCH v3 05/32] irqchip/gic-v4.1: VPE table (aka GICR_VPROPBASER) allocation Marc Zyngier
2020-01-20 14:03   ` Zenghui Yu
2020-01-20 15:11     ` Marc Zyngier
2020-01-22  2:59   ` Zenghui Yu
2019-12-24 11:10 ` [PATCH v3 06/32] irqchip/gic-v4.1: Implement the v4.1 flavour of VMAPP Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 07/32] irqchip/gic-v4.1: Don't use the VPE proxy if RVPEID is set Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 08/32] irqchip/gic-v4.1: Implement the v4.1 flavour of VMOVP Marc Zyngier
2019-12-24 11:10 ` Marc Zyngier [this message]
2019-12-24 11:10 ` [PATCH v3 10/32] irqchip/gic-v4.1: Add mask/unmask doorbell callbacks Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 11/32] irqchip/gic-v4.1: Add VPE residency callback Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 12/32] irqchip/gic-v4.1: Add VPE eviction callback Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 13/32] irqchip/gic-v4.1: Add VPE INVALL callback Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 14/32] irqchip/gic-v4.1: Suppress per-VLPI doorbell Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 15/32] irqchip/gic-v4.1: Allow direct invalidation of VLPIs Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 16/32] irqchip/gic-v4.1: Advertise support v4.1 to KVM Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 17/32] irqchip/gic-v4.1: Map the ITS SGIR register page Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 18/32] irqchip/gic-v4.1: Plumb skeletal VSGI irqchip Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 19/32] irqchip/gic-v4.1: Add initial SGI configuration Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 20/32] irqchip/gic-v4.1: Plumb mask/unmask SGI callbacks Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 21/32] irqchip/gic-v4.1: Plumb get/set_irqchip_state " Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 22/32] irqchip/gic-v4.1: Plumb set_vcpu_affinity " Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 23/32] irqchip/gic-v4.1: Move doorbell management to the GICv4 abstraction layer Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 24/32] irqchip/gic-v4.1: Add VSGI allocation/teardown Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 25/32] irqchip/gic-v4.1: Add VSGI property setup Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 26/32] irqchip/gic-v4.1: Eagerly vmap vPEs Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 27/32] KVM: arm64: GICv4.1: Let doorbells be auto-enabled Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 28/32] KVM: arm64: GICv4.1: Add direct injection capability to SGI registers Marc Zyngier
2019-12-28  9:19   ` Zenghui Yu
2019-12-28 10:41     ` Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 29/32] KVM: arm64: GICv4.1: Allow SGIs to switch between HW and SW interrupts Marc Zyngier
2020-01-15  2:49   ` Shaokun Zhang
2020-01-15  3:49     ` Zenghui Yu
2020-01-15 13:32       ` Marc Zyngier
2020-01-15 13:49         ` Zenghui Yu
2020-01-16  6:13         ` Shaokun Zhang
2020-01-15 13:17     ` Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 30/32] KVM: arm64: GICv4.1: Plumb SGI implementation selection in the distributor Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 31/32] KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable Marc Zyngier
2019-12-24 11:10 ` [PATCH v3 32/32] KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs Marc Zyngier

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