[GIT pull] irq updates for 4.7

From: Thomas Gleixner
Date: Fri Jun 03 2016 - 16:04:55 EST

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Linus,

please pull the latest irq-urgent-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq-urgent-for-linus

This update constains:

- A few simple fixes for fallout from the recent gic-v3 changes
- A workaround for a Cavium thunderX erratum
- A bugfix for the pic32 irqchip to make external interrupts work proper
- A missing return value in the generic IPI management code

Thanks,

tglx

------------------>
Andrew Jones (2):
irqchip/gic-v3: Fix copy+paste mistakes in defines
irqchip/gic-v3: Fix quiescence check in gic_enable_redist

Ganapatrao Kulkarni (1):
irqchip/gicv3-its: numa: Enable workaround for Cavium thunderx erratum 23144

Joshua Henderson (1):
irqchip/irq-pic32-evic: Fix bug with external interrupts.

Marc Zyngier (1):
irqchip/gic-v3: Fix ICC_SGI1R_EL1.INTID decoding mask

Matt Redfearn (1):
genirq: Fix missing return value in irq_destroy_ipi()

Documentation/arm64/silicon-errata.txt | 1 +
arch/arm64/Kconfig | 9 +++++++
drivers/irqchip/irq-gic-v3-its.c | 49 ++++++++++++++++++++++++++++++++--
drivers/irqchip/irq-gic-v3.c | 2 +-
drivers/irqchip/irq-pic32-evic.c | 2 +-
include/linux/irqchip/arm-gic-v3.h | 6 ++---
kernel/irq/ipi.c | 2 +-
7 files changed, 63 insertions(+), 8 deletions(-)

diff --git a/Documentation/arm64/silicon-errata.txt b/Documentation/arm64/silicon-errata.txt
index c6938e50e71f..4da60b463995 100644
--- a/Documentation/arm64/silicon-errata.txt
+++ b/Documentation/arm64/silicon-errata.txt
@@ -56,6 +56,7 @@ stable kernels.
| ARM | MMU-500 | #841119,#826419 | N/A |
| | | | |
| Cavium | ThunderX ITS | #22375, #24313 | CAVIUM_ERRATUM_22375 |
+| Cavium | ThunderX ITS | #23144 | CAVIUM_ERRATUM_23144 |
| Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 |
| Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 |
| Cavium | ThunderX SMMUv2 | #27704 | N/A |
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 76747d92bc72..57a9f67971d3 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -426,6 +426,15 @@ config CAVIUM_ERRATUM_22375

If unsure, say Y.

+config CAVIUM_ERRATUM_23144
+ bool "Cavium erratum 23144: ITS SYNC hang on dual socket system"
+ depends on NUMA
+ default y
+ help
+ ITS SYNC command hang for cross node io and collections/cpu mapping.
+
+ If unsure, say Y.
+
config CAVIUM_ERRATUM_23154
bool "Cavium erratum 23154: Access to ICC_IAR1_EL1 is not sync'ed"
default y
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 6bd881be24ea..5eb1f9e17a98 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -41,6 +41,7 @@

#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0)
#define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1)
+#define ITS_FLAGS_WORKAROUND_CAVIUM_23144 (1ULL << 2)

#define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0)

@@ -82,6 +83,7 @@ struct its_node {
u64 flags;
u32 ite_size;
u32 device_ids;
+ int numa_node;
};

#define ITS_ITT_ALIGN SZ_256
@@ -613,11 +615,23 @@ static void its_unmask_irq(struct irq_data *d)
static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
bool force)
{
- unsigned int cpu = cpumask_any_and(mask_val, cpu_online_mask);
+ unsigned int cpu;
+ const struct cpumask *cpu_mask = cpu_online_mask;
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
struct its_collection *target_col;
u32 id = its_get_event_id(d);

+ /* lpi cannot be routed to a redistributor that is on a foreign node */
+ if (its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) {
+ if (its_dev->its->numa_node >= 0) {
+ cpu_mask = cpumask_of_node(its_dev->its->numa_node);
+ if (!cpumask_intersects(mask_val, cpu_mask))
+ return -EINVAL;
+ }
+ }
+
+ cpu = cpumask_any_and(mask_val, cpu_mask);
+
if (cpu >= nr_cpu_ids)
return -EINVAL;

@@ -1101,6 +1115,16 @@ static void its_cpu_init_collection(void)
list_for_each_entry(its, &its_nodes, entry) {
u64 target;

+ /* avoid cross node collections and its mapping */
+ if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) {
+ struct device_node *cpu_node;
+
+ cpu_node = of_get_cpu_node(cpu, NULL);
+ if (its->numa_node != NUMA_NO_NODE &&
+ its->numa_node != of_node_to_nid(cpu_node))
+ continue;
+ }
+
/*
* We now have to bind each collection to its target
* redistributor.
@@ -1351,9 +1375,14 @@ static void its_irq_domain_activate(struct irq_domain *domain,
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u32 event = its_get_event_id(d);
+ const struct cpumask *cpu_mask = cpu_online_mask;
+
+ /* get the cpu_mask of local node */
+ if (its_dev->its->numa_node >= 0)
+ cpu_mask = cpumask_of_node(its_dev->its->numa_node);

/* Bind the LPI to the first possible CPU */
- its_dev->event_map.col_map[event] = cpumask_first(cpu_online_mask);
+ its_dev->event_map.col_map[event] = cpumask_first(cpu_mask);

/* Map the GIC IRQ and event to the device */
its_send_mapvi(its_dev, d->hwirq, event);
@@ -1443,6 +1472,13 @@ static void __maybe_unused its_enable_quirk_cavium_22375(void *data)
its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375;
}

+static void __maybe_unused its_enable_quirk_cavium_23144(void *data)
+{
+ struct its_node *its = data;
+
+ its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144;
+}
+
static const struct gic_quirk its_quirks[] = {
#ifdef CONFIG_CAVIUM_ERRATUM_22375
{
@@ -1452,6 +1488,14 @@ static const struct gic_quirk its_quirks[] = {
.init = its_enable_quirk_cavium_22375,
},
#endif
+#ifdef CONFIG_CAVIUM_ERRATUM_23144
+ {
+ .desc = "ITS: Cavium erratum 23144",
+ .iidr = 0xa100034c, /* ThunderX pass 1.x */
+ .mask = 0xffff0fff,
+ .init = its_enable_quirk_cavium_23144,
+ },
+#endif
{
}
};
@@ -1514,6 +1558,7 @@ static int __init its_probe(struct device_node *node,
its->base = its_base;
its->phys_base = res.start;
its->ite_size = ((readl_relaxed(its_base + GITS_TYPER) >> 4) & 0xf) + 1;
+ its->numa_node = of_node_to_nid(node);

its->cmd_base = kzalloc(ITS_CMD_QUEUE_SZ, GFP_KERNEL);
if (!its->cmd_base) {
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index fb042ba9a3db..2c5ba0e704bf 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -155,7 +155,7 @@ static void gic_enable_redist(bool enable)

while (count--) {
val = readl_relaxed(rbase + GICR_WAKER);
- if (enable ^ (val & GICR_WAKER_ChildrenAsleep))
+ if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep))
break;
cpu_relax();
udelay(1);
diff --git a/drivers/irqchip/irq-pic32-evic.c b/drivers/irqchip/irq-pic32-evic.c
index e7155db01d55..73addb4b625b 100644
--- a/drivers/irqchip/irq-pic32-evic.c
+++ b/drivers/irqchip/irq-pic32-evic.c
@@ -91,7 +91,7 @@ static int pic32_set_type_edge(struct irq_data *data,
/* set polarity for external interrupts only */
for (i = 0; i < ARRAY_SIZE(priv->ext_irqs); i++) {
if (priv->ext_irqs[i] == data->hwirq) {
- ret = pic32_set_ext_polarity(i + 1, flow_type);
+ ret = pic32_set_ext_polarity(i, flow_type);
if (ret)
return ret;
}
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index bfbd707de390..dc493e0f0ff7 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -305,12 +305,12 @@
#define ICC_SGI1R_AFFINITY_1_SHIFT 16
#define ICC_SGI1R_AFFINITY_1_MASK (0xff << ICC_SGI1R_AFFINITY_1_SHIFT)
#define ICC_SGI1R_SGI_ID_SHIFT 24
-#define ICC_SGI1R_SGI_ID_MASK (0xff << ICC_SGI1R_SGI_ID_SHIFT)
+#define ICC_SGI1R_SGI_ID_MASK (0xfULL << ICC_SGI1R_SGI_ID_SHIFT)
#define ICC_SGI1R_AFFINITY_2_SHIFT 32
-#define ICC_SGI1R_AFFINITY_2_MASK (0xffULL << ICC_SGI1R_AFFINITY_1_SHIFT)
+#define ICC_SGI1R_AFFINITY_2_MASK (0xffULL << ICC_SGI1R_AFFINITY_2_SHIFT)
#define ICC_SGI1R_IRQ_ROUTING_MODE_BIT 40
#define ICC_SGI1R_AFFINITY_3_SHIFT 48
-#define ICC_SGI1R_AFFINITY_3_MASK (0xffULL << ICC_SGI1R_AFFINITY_1_SHIFT)
+#define ICC_SGI1R_AFFINITY_3_MASK (0xffULL << ICC_SGI1R_AFFINITY_3_SHIFT)

#include <asm/arch_gicv3.h>

diff --git a/kernel/irq/ipi.c b/kernel/irq/ipi.c
index c42742208e5e..89b49f6773f0 100644
--- a/kernel/irq/ipi.c
+++ b/kernel/irq/ipi.c
@@ -125,7 +125,7 @@ int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest)

domain = data->domain;
if (WARN_ON(domain == NULL))
- return;
+ return -EINVAL;

if (!irq_domain_is_ipi(domain)) {
pr_warn("Trying to destroy a non IPI domain!\n");

Next message: KY Srinivasan: "RE: [PATCH] Drivers: hv: fix infinite wait when channel open timeouts"
Previous message: Brian Norris: "Re: [PATCH 03/14] pwm: rockchip: Fix period and duty_cycle approximation"
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