[GIT pull] irq/core for v7.1-rc1
From: Thomas Gleixner
Date: Sun Apr 12 2026 - 13:47:23 EST
Linus,
please pull the latest irq/core branch from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq-core-2026-04-12
up to: e8be82c2d77e: Drivers: hv: Move add_interrupt_randomness() to hypervisor callback sysvec
Update for the core interrupt subsystem:
- Invoke add_interrupt_randomness() in handle_percpu_devid_irq() and
cleanup the workaround in the Hyper-V driver, which would now invoke
it twice on ARM64. Removing it from the driver requires to add it to
the x86 system vector entry point.
- Remove the pointles cpu_read_lock() around reading CPU possible mask,
which is read only after init.
- Add documentation for the interaction between device tree bindings and
the interrupt type defines in irq.h.
- Delete stale defines in the matrix allocator and the equivalent in
loongarch.
Thanks,
tglx
------------------>
Geert Uytterhoeven (1):
genirq: Document interaction between <linux/irq.h> and DT binding defines
Michael Kelley (2):
genirq/chip: Invoke add_interrupt_randomness() in handle_percpu_devid_irq()
Drivers: hv: Move add_interrupt_randomness() to hypervisor callback sysvec
Nam Cao (1):
genirq/matrix, LoongArch: Delete IRQ_MATRIX_BITS leftovers
Sebastian Andrzej Siewior (1):
genirq/affinity: Remove cpus_read_lock() while reading cpu_possible_mask
arch/loongarch/include/asm/irq.h | 1 -
arch/x86/kernel/cpu/mshyperv.c | 2 ++
drivers/hv/mshv_synic.c | 3 ---
drivers/hv/vmbus_drv.c | 3 ---
include/linux/irq.h | 4 ++++
kernel/irq/affinity.c | 7 ++-----
kernel/irq/chip.c | 3 +++
kernel/irq/matrix.c | 2 +-
8 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 3943647503a9..537add26daf4 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -48,7 +48,6 @@ void spurious_interrupt(void);
*/
#define NR_VECTORS 256
#define NR_LEGACY_VECTORS 16
-#define IRQ_MATRIX_BITS NR_VECTORS
#define AVEC_IRQ_SHIFT 4
#define AVEC_IRQ_BIT 8
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 9befdc557d9e..a7dfc29d3470 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -161,6 +161,8 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback)
if (vmbus_handler)
vmbus_handler();
+ add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR);
+
if (ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED)
apic_eoi();
diff --git a/drivers/hv/mshv_synic.c b/drivers/hv/mshv_synic.c
index 43f1bcbbf2d3..e2288a726fec 100644
--- a/drivers/hv/mshv_synic.c
+++ b/drivers/hv/mshv_synic.c
@@ -12,7 +12,6 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/io.h>
-#include <linux/random.h>
#include <linux/cpuhotplug.h>
#include <linux/reboot.h>
#include <asm/mshyperv.h>
@@ -445,8 +444,6 @@ void mshv_isr(void)
mb();
if (msg->header.message_flags.msg_pending)
hv_set_non_nested_msr(HV_MSR_EOM, 0);
-
- add_interrupt_randomness(mshv_sint_vector);
} else {
pr_warn_once("%s: unknown message type 0x%x\n", __func__,
msg->header.message_type);
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index bc4fc1951ae1..e7ac79e2fb49 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -32,7 +32,6 @@
#include <linux/ptrace.h>
#include <linux/sysfb.h>
#include <linux/efi.h>
-#include <linux/random.h>
#include <linux/kernel.h>
#include <linux/syscore_ops.h>
#include <linux/dma-map-ops.h>
@@ -1361,8 +1360,6 @@ static void __vmbus_isr(void)
vmbus_message_sched(hv_cpu, hv_cpu->hyp_synic_message_page);
vmbus_message_sched(hv_cpu, hv_cpu->para_synic_message_page);
-
- add_interrupt_randomness(vmbus_interrupt);
}
static DEFINE_PER_CPU(bool, vmbus_irq_pending);
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 951acbdb9f84..efa514ee562f 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -35,6 +35,10 @@ enum irqchip_irq_state;
*
* Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
*
+ * Note that the first 6 definitions are shadowed by C preprocessor definitions
+ * in include/dt-bindings/interrupt-controller/irq.h. This is not an issue, as
+ * the actual values must be the same, due to being part of the stable DT ABI.
+ *
* IRQ_TYPE_NONE - default, unspecified type
* IRQ_TYPE_EDGE_RISING - rising edge triggered
* IRQ_TYPE_EDGE_FALLING - falling edge triggered
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
index 85c45cfe7223..78f2418a8925 100644
--- a/kernel/irq/affinity.c
+++ b/kernel/irq/affinity.c
@@ -115,13 +115,10 @@ unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
if (resv > minvec)
return 0;
- if (affd->calc_sets) {
+ if (affd->calc_sets)
set_vecs = maxvec - resv;
- } else {
- cpus_read_lock();
+ else
set_vecs = cpumask_weight(cpu_possible_mask);
- cpus_read_unlock();
- }
return resv + min(set_vecs, maxvec - resv);
}
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 6147a07d0127..6c9b1dc4e7d4 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/irqdomain.h>
+#include <linux/random.h>
#include <trace/events/irq.h>
@@ -929,6 +930,8 @@ void handle_percpu_devid_irq(struct irq_desc *desc)
enabled ? " and unmasked" : "", irq, cpu);
}
+ add_interrupt_randomness(irq);
+
if (chip->irq_eoi)
chip->irq_eoi(&desc->irq_data);
}
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 0f79a4abea05..faafb43a4e61 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -39,7 +39,7 @@ struct irq_matrix {
/**
* irq_alloc_matrix - Allocate a irq_matrix structure and initialize it
- * @matrix_bits: Number of matrix bits must be <= IRQ_MATRIX_BITS
+ * @matrix_bits: Number of matrix bits
* @alloc_start: From which bit the allocation search starts
* @alloc_end: At which bit the allocation search ends, i.e first
* invalid bit