Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "The interrupt subsystem delivers this time:

   - Refactoring of the GIC-V3 driver to prepare for the GIC-V4 support

   - Initial GIC-V4 support

   - Consolidation of the FSL MSI support

   - Utilize the effective affinity interface in various ARM irqchip
     drivers

   - Yet another interrupt chip driver (UniPhier AIDET)

   - Bulk conversion of the irq chip driver to use %pOF

   - The usual small fixes and improvements all over the place"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (77 commits)
  irqchip/ls-scfg-msi: Add MSI affinity support
  irqchip/ls-scfg-msi: Add LS1043a v1.1 MSI support
  irqchip/ls-scfg-msi: Add LS1046a MSI support
  arm64: dts: ls1046a: Add MSI dts node
  arm64: dts: ls1043a: Share all MSIs
  arm: dts: ls1021a: Share all MSIs
  arm64: dts: ls1043a: Fix typo of MSI compatible string
  arm: dts: ls1021a: Fix typo of MSI compatible string
  irqchip/ls-scfg-msi: Fix typo of MSI compatible strings
  irqchip/irq-bcm7120-l2: Use correct I/O accessors for irq_fwd_mask
  irqchip/mmp: Make mmp_intc_conf const
  irqchip/gic: Make irq_chip const
  irqchip/gic-v3: Advertise GICv4 support to KVM
  irqchip/gic-v4: Enable low-level GICv4 operations
  irqchip/gic-v4: Add some basic documentation
  irqchip/gic-v4: Add VLPI configuration interface
  irqchip/gic-v4: Add VPE command interface
  irqchip/gic-v4: Add per-VM VPE domain creation
  irqchip/gic-v3-its: Set implementation defined bit to enable VLPIs
  irqchip/gic-v3-its: Allow doorbell interrupts to be injected/cleared
  ...

1 files changed, 79 insertions, 30 deletions

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 984c3ecfd22c..519149ec9053 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013, 2014 ARM Limited, All Rights Reserved.
+ * Copyright (C) 2013-2017 ARM Limited, All Rights Reserved.
  * Author: Marc Zyngier <marc.zyngier@arm.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -423,24 +423,14 @@ static void __init gic_dist_init(void)
 		gic_write_irouter(affinity, base + GICD_IROUTER + i * 8);
 }
 
-static int gic_populate_rdist(void)
+static int gic_iterate_rdists(int (*fn)(struct redist_region *, void __iomem *))
 {
-	unsigned long mpidr = cpu_logical_map(smp_processor_id());
-	u64 typer;
-	u32 aff;
+	int ret = -ENODEV;
 	int i;
 
-	/*
-	 * Convert affinity to a 32bit value that can be matched to
-	 * GICR_TYPER bits [63:32].
-	 */
-	aff = (MPIDR_AFFINITY_LEVEL(mpidr, 3) << 24 |
-	       MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 |
-	       MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 |
-	       MPIDR_AFFINITY_LEVEL(mpidr, 0));
-
 	for (i = 0; i < gic_data.nr_redist_regions; i++) {
 		void __iomem *ptr = gic_data.redist_regions[i].redist_base;
+		u64 typer;
 		u32 reg;
 
 		reg = readl_relaxed(ptr + GICR_PIDR2) & GIC_PIDR2_ARCH_MASK;
@@ -452,15 +442,9 @@ static int gic_populate_rdist(void)
 
 		do {
 			typer = gic_read_typer(ptr + GICR_TYPER);
-			if ((typer >> 32) == aff) {
-				u64 offset = ptr - gic_data.redist_regions[i].redist_base;
-				gic_data_rdist_rd_base() = ptr;
-				gic_data_rdist()->phys_base = gic_data.redist_regions[i].phys_base + offset;
-				pr_info("CPU%d: found redistributor %lx region %d:%pa\n",
-					smp_processor_id(), mpidr, i,
-					&gic_data_rdist()->phys_base);
+			ret = fn(gic_data.redist_regions + i, ptr);
+			if (!ret)
 				return 0;
-			}
 
 			if (gic_data.redist_regions[i].single_redist)
 				break;
@@ -475,12 +459,71 @@ static int gic_populate_rdist(void)
 		} while (!(typer & GICR_TYPER_LAST));
 	}
 
+	return ret ? -ENODEV : 0;
+}
+
+static int __gic_populate_rdist(struct redist_region *region, void __iomem *ptr)
+{
+	unsigned long mpidr = cpu_logical_map(smp_processor_id());
+	u64 typer;
+	u32 aff;
+
+	/*
+	 * Convert affinity to a 32bit value that can be matched to
+	 * GICR_TYPER bits [63:32].
+	 */
+	aff = (MPIDR_AFFINITY_LEVEL(mpidr, 3) << 24 |
+	       MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 |
+	       MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 |
+	       MPIDR_AFFINITY_LEVEL(mpidr, 0));
+
+	typer = gic_read_typer(ptr + GICR_TYPER);
+	if ((typer >> 32) == aff) {
+		u64 offset = ptr - region->redist_base;
+		gic_data_rdist_rd_base() = ptr;
+		gic_data_rdist()->phys_base = region->phys_base + offset;
+
+		pr_info("CPU%d: found redistributor %lx region %d:%pa\n",
+			smp_processor_id(), mpidr,
+			(int)(region - gic_data.redist_regions),
+			&gic_data_rdist()->phys_base);
+		return 0;
+	}
+
+	/* Try next one */
+	return 1;
+}
+
+static int gic_populate_rdist(void)
+{
+	if (gic_iterate_rdists(__gic_populate_rdist) == 0)
+		return 0;
+
 	/* We couldn't even deal with ourselves... */
 	WARN(true, "CPU%d: mpidr %lx has no re-distributor!\n",
-	     smp_processor_id(), mpidr);
+	     smp_processor_id(),
+	     (unsigned long)cpu_logical_map(smp_processor_id()));
 	return -ENODEV;
 }
 
+static int __gic_update_vlpi_properties(struct redist_region *region,
+					void __iomem *ptr)
+{
+	u64 typer = gic_read_typer(ptr + GICR_TYPER);
+	gic_data.rdists.has_vlpis &= !!(typer & GICR_TYPER_VLPIS);
+	gic_data.rdists.has_direct_lpi &= !!(typer & GICR_TYPER_DirectLPIS);
+
+	return 1;
+}
+
+static void gic_update_vlpi_properties(void)
+{
+	gic_iterate_rdists(__gic_update_vlpi_properties);
+	pr_info("%sVLPI support, %sdirect LPI support\n",
+		!gic_data.rdists.has_vlpis ? "no " : "",
+		!gic_data.rdists.has_direct_lpi ? "no " : "");
+}
+
 static void gic_cpu_sys_reg_init(void)
 {
 	/*
@@ -677,6 +720,8 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
 	else
 		gic_dist_wait_for_rwp();
 
+	irq_data_update_effective_affinity(d, cpumask_of(cpu));
+
 	return IRQ_SET_MASK_OK_DONE;
 }
 #else
@@ -775,6 +820,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
 		irq_domain_set_info(d, irq, hw, chip, d->host_data,
 				    handle_fasteoi_irq, NULL, NULL);
 		irq_set_probe(irq);
+		irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
 	}
 	/* LPIs */
 	if (hw >= 8192 && hw < GIC_ID_NR) {
@@ -953,6 +999,8 @@ static int __init gic_init_bases(void __iomem *dist_base,
 	gic_data.domain = irq_domain_create_tree(handle, &gic_irq_domain_ops,
 						 &gic_data);
 	gic_data.rdists.rdist = alloc_percpu(typeof(*gic_data.rdists.rdist));
+	gic_data.rdists.has_vlpis = true;
+	gic_data.rdists.has_direct_lpi = true;
 
 	if (WARN_ON(!gic_data.domain) || WARN_ON(!gic_data.rdists.rdist)) {
 		err = -ENOMEM;
@@ -961,6 +1009,8 @@ static int __init gic_init_bases(void __iomem *dist_base,
 
 	set_handle_irq(gic_handle_irq);
 
+	gic_update_vlpi_properties();
+
 	if (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && gic_dist_supports_lpis())
 		its_init(handle, &gic_data.rdists, gic_data.domain);
 
@@ -1067,7 +1117,7 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
 			if (WARN_ON(cpu == -1))
 				continue;
 
-			pr_cont("%s[%d] ", cpu_node->full_name, cpu);
+			pr_cont("%pOF[%d] ", cpu_node, cpu);
 
 			cpumask_set_cpu(cpu, &part->mask);
 		}
@@ -1122,6 +1172,7 @@ static void __init gic_of_setup_kvm_info(struct device_node *node)
 	if (!ret)
 		gic_v3_kvm_info.vcpu = r;
 
+	gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
 	gic_set_kvm_info(&gic_v3_kvm_info);
 }
 
@@ -1135,15 +1186,13 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare
 
 	dist_base = of_iomap(node, 0);
 	if (!dist_base) {
-		pr_err("%s: unable to map gic dist registers\n",
-			node->full_name);
+		pr_err("%pOF: unable to map gic dist registers\n", node);
 		return -ENXIO;
 	}
 
 	err = gic_validate_dist_version(dist_base);
 	if (err) {
-		pr_err("%s: no distributor detected, giving up\n",
-			node->full_name);
+		pr_err("%pOF: no distributor detected, giving up\n", node);
 		goto out_unmap_dist;
 	}
 
@@ -1163,8 +1212,7 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare
 		ret = of_address_to_resource(node, 1 + i, &res);
 		rdist_regs[i].redist_base = of_iomap(node, 1 + i);
 		if (ret || !rdist_regs[i].redist_base) {
-			pr_err("%s: couldn't map region %d\n",
-			       node->full_name, i);
+			pr_err("%pOF: couldn't map region %d\n", node, i);
 			err = -ENODEV;
 			goto out_unmap_rdist;
 		}
@@ -1418,6 +1466,7 @@ static void __init gic_acpi_setup_kvm_info(void)
 		vcpu->end = vcpu->start + ACPI_GICV2_VCPU_MEM_SIZE - 1;
 	}
 
+	gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
 	gic_set_kvm_info(&gic_v3_kvm_info);
 }