From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v3 19/59] irqchip/gic-v3-its: Add VPE domain infrastructure Date: Mon, 31 Jul 2017 18:25:57 +0100 Message-ID: <20170731172637.29355-20-marc.zyngier@arm.com> References: <20170731172637.29355-1-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jason Cooper , Thomas Gleixner To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: In-Reply-To: <20170731172637.29355-1-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org Add the basic GICv4 VPE (vcpu in GICv4 parlance) infrastructure (irqchip, irq domain) that is going to be populated in the following patches. Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index b618c259be8b..1fa345d53088 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -2026,6 +2026,13 @@ static const struct irq_domain_ops its_domain_ops = { .deactivate = its_irq_domain_deactivate, }; +static struct irq_chip its_vpe_irq_chip = { + .name = "GICv4-vpe", +}; + +static const struct irq_domain_ops its_vpe_domain_ops = { +}; + static int its_force_quiescent(void __iomem *base) { u32 count = 1000000; /* 1s */ @@ -2142,6 +2149,11 @@ static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) return 0; } +static int its_init_vpe_domain(void) +{ + return 0; +} + static int __init its_compute_its_list_map(struct resource *res, void __iomem *its_base) { @@ -2484,6 +2496,9 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, struct irq_domain *parent_domain) { struct device_node *of_node; + struct its_node *its; + bool has_v4 = false; + int err; its_parent = parent_domain; of_node = to_of_node(handle); @@ -2498,5 +2513,21 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, } gic_rdists = rdists; - return its_alloc_lpi_tables(); + err = its_alloc_lpi_tables(); + if (err) + return err; + + its_lpi_init(rdists->id_bits); + + list_for_each_entry(its, &its_nodes, entry) + has_v4 |= its->is_v4; + + if (has_v4 & rdists->has_vlpis) { + if (its_init_vpe_domain()) { + rdists->has_vlpis = false; + pr_err("ITS: Disabling GICv4 support\n"); + } + } + + return 0; } -- 2.11.0