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path: root/drivers/irqchip/irq-gic-v3.c
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Diffstat (limited to 'drivers/irqchip/irq-gic-v3.c')
-rw-r--r--drivers/irqchip/irq-gic-v3.c109
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);
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-05-19 19:35:00 +0200