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authorLinus Torvalds <torvalds@linux-foundation.org>2024-08-11 10:07:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2024-08-11 10:07:52 -0700
commit56fe0a6a9f8941b154bd6a41ed828e9e1078b67b (patch)
tree64344d9cb0ca7bed06b2dfce1f36f4d68be5d25b
parentcb2e5ee8e7a04be6a762b51241701b5105b82022 (diff)
parent03f9885c60adf73488fe32aab628ee3d4a39598e (diff)
downloadlwn-56fe0a6a9f8941b154bd6a41ed828e9e1078b67b.tar.gz
lwn-56fe0a6a9f8941b154bd6a41ed828e9e1078b67b.zip
Merge tag 'irq-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner: "Three small fixes for interrupt core and drivers: - The interrupt core fails to honor caller supplied affinity hints for non-managed interrupts and uses the system default affinity on startup instead. Set the missing flag in the descriptor to tell the core to use the provided affinity. - Fix a shift out of bounds error in the Xilinx driver - Handle switching to level trigger correctly in the RISCV APLIC driver. It failed to retrigger the interrupt which causes it to become stale" * tag 'irq-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/riscv-aplic: Retrigger MSI interrupt on source configuration irqchip/xilinx: Fix shift out of bounds genirq/irqdesc: Honor caller provided affinity in alloc_desc()
-rw-r--r--drivers/irqchip/irq-riscv-aplic-msi.c32
-rw-r--r--drivers/irqchip/irq-xilinx-intc.c2
-rw-r--r--kernel/irq/irqdesc.c1
3 files changed, 27 insertions, 8 deletions
diff --git a/drivers/irqchip/irq-riscv-aplic-msi.c b/drivers/irqchip/irq-riscv-aplic-msi.c
index 028444af48bd..d7773f76e5d0 100644
--- a/drivers/irqchip/irq-riscv-aplic-msi.c
+++ b/drivers/irqchip/irq-riscv-aplic-msi.c
@@ -32,15 +32,10 @@ static void aplic_msi_irq_unmask(struct irq_data *d)
aplic_irq_unmask(d);
}
-static void aplic_msi_irq_eoi(struct irq_data *d)
+static void aplic_msi_irq_retrigger_level(struct irq_data *d)
{
struct aplic_priv *priv = irq_data_get_irq_chip_data(d);
- /*
- * EOI handling is required only for level-triggered interrupts
- * when APLIC is in MSI mode.
- */
-
switch (irqd_get_trigger_type(d)) {
case IRQ_TYPE_LEVEL_LOW:
case IRQ_TYPE_LEVEL_HIGH:
@@ -59,6 +54,29 @@ static void aplic_msi_irq_eoi(struct irq_data *d)
}
}
+static void aplic_msi_irq_eoi(struct irq_data *d)
+{
+ /*
+ * EOI handling is required only for level-triggered interrupts
+ * when APLIC is in MSI mode.
+ */
+ aplic_msi_irq_retrigger_level(d);
+}
+
+static int aplic_msi_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ int rc = aplic_irq_set_type(d, type);
+
+ if (rc)
+ return rc;
+ /*
+ * Updating sourcecfg register for level-triggered interrupts
+ * requires interrupt retriggering when APLIC is in MSI mode.
+ */
+ aplic_msi_irq_retrigger_level(d);
+ return 0;
+}
+
static void aplic_msi_write_msg(struct irq_data *d, struct msi_msg *msg)
{
unsigned int group_index, hart_index, guest_index, val;
@@ -130,7 +148,7 @@ static const struct msi_domain_template aplic_msi_template = {
.name = "APLIC-MSI",
.irq_mask = aplic_msi_irq_mask,
.irq_unmask = aplic_msi_irq_unmask,
- .irq_set_type = aplic_irq_set_type,
+ .irq_set_type = aplic_msi_irq_set_type,
.irq_eoi = aplic_msi_irq_eoi,
#ifdef CONFIG_SMP
.irq_set_affinity = irq_chip_set_affinity_parent,
diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c
index 238d3d344949..7e08714d507f 100644
--- a/drivers/irqchip/irq-xilinx-intc.c
+++ b/drivers/irqchip/irq-xilinx-intc.c
@@ -189,7 +189,7 @@ static int __init xilinx_intc_of_init(struct device_node *intc,
irqc->intr_mask = 0;
}
- if (irqc->intr_mask >> irqc->nr_irq)
+ if ((u64)irqc->intr_mask >> irqc->nr_irq)
pr_warn("irq-xilinx: mismatch in kind-of-intr param\n");
pr_info("irq-xilinx: %pOF: num_irq=%d, edge=0x%x\n",
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 07e99c936ba5..1dee88ba0ae4 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -530,6 +530,7 @@ static int alloc_descs(unsigned int start, unsigned int cnt, int node,
flags = IRQD_AFFINITY_MANAGED |
IRQD_MANAGED_SHUTDOWN;
}
+ flags |= IRQD_AFFINITY_SET;
mask = &affinity->mask;
node = cpu_to_node(cpumask_first(mask));
affinity++;