Merge tag 'irq-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "Core:

   - Remove a global lock in the affinity setting code

     The lock protects a cpumask for intermediate results and the lock
     causes a bottleneck on simultaneous start of multiple virtual
     machines. Replace the lock and the static cpumask with a per CPU
     cpumask which is nicely serialized by raw spinlock held when
     executing this code.

   - Provide support for giving a suffix to interrupt domain names.

     That's required to support devices with subfunctions so that the
     domain names are distinct even if they originate from the same
     device node.

   - The usual set of cleanups and enhancements all over the place

  Drivers:

   - Support for longarch AVEC interrupt chip

   - Refurbishment of the Armada driver so it can be extended for new
     variants.

   - The usual set of cleanups and enhancements all over the place"

* tag 'irq-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (73 commits)
  genirq: Use cpumask_intersects()
  genirq/cpuhotplug: Use cpumask_intersects()
  irqchip/apple-aic: Only access system registers on SoCs which provide them
  irqchip/apple-aic: Add a new "Global fast IPIs only" feature level
  irqchip/apple-aic: Skip unnecessary enabling of use_fast_ipi
  dt-bindings: apple,aic: Document A7-A11 compatibles
  irqdomain: Use IS_ERR_OR_NULL() in irq_domain_trim_hierarchy()
  genirq/msi: Use kmemdup_array() instead of kmemdup()
  genirq/proc: Change the return value for set affinity permission error
  genirq/proc: Use irq_move_pending() in show_irq_affinity()
  genirq/proc: Correctly set file permissions for affinity control files
  genirq: Get rid of global lock in irq_do_set_affinity()
  genirq: Fix typo in struct comment
  irqchip/loongarch-avec: Add AVEC irqchip support
  irqchip/loongson-pch-msi: Prepare get_pch_msi_handle() for AVECINTC
  irqchip/loongson-eiointc: Rename CPUHP_AP_IRQ_LOONGARCH_STARTING
  LoongArch: Architectural preparation for AVEC irqchip
  LoongArch: Move irqchip function prototypes to irq-loongson.h
  irqchip/loongson-pch-msi: Switch to MSI parent domains
  softirq: Remove unused 'action' parameter from action callback
  ...

25 files changed, 1014 insertions, 520 deletions

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index d078bdc48c38..341cd9ca5a05 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -685,6 +685,7 @@ config LOONGSON_PCH_MSI
 	depends on PCI
 	default MACH_LOONGSON64
 	select IRQ_DOMAIN_HIERARCHY
+	select IRQ_MSI_LIB
 	select PCI_MSI
 	help
 	  Support for the Loongson PCH MSI Controller.
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 15635812b2d6..e3679ec2b9f7 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -110,7 +110,7 @@ obj-$(CONFIG_LS1X_IRQ)			+= irq-ls1x.o
 obj-$(CONFIG_TI_SCI_INTR_IRQCHIP)	+= irq-ti-sci-intr.o
 obj-$(CONFIG_TI_SCI_INTA_IRQCHIP)	+= irq-ti-sci-inta.o
 obj-$(CONFIG_TI_PRUSS_INTC)		+= irq-pruss-intc.o
-obj-$(CONFIG_IRQ_LOONGARCH_CPU)		+= irq-loongarch-cpu.o
+obj-$(CONFIG_IRQ_LOONGARCH_CPU)		+= irq-loongarch-cpu.o irq-loongarch-avec.o
 obj-$(CONFIG_LOONGSON_LIOINTC)		+= irq-loongson-liointc.o
 obj-$(CONFIG_LOONGSON_EIOINTC)		+= irq-loongson-eiointc.o
 obj-$(CONFIG_LOONGSON_HTPIC)		+= irq-loongson-htpic.o
diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 5c534d9fd2b0..da5250f0155c 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -234,7 +234,10 @@ enum fiq_hwirq {
 	AIC_NR_FIQ
 };
 
+/* True if UNCORE/UNCORE2 and Sn_... IPI registers are present and used (A11+) */
 static DEFINE_STATIC_KEY_TRUE(use_fast_ipi);
+/* True if SYS_IMP_APL_IPI_RR_LOCAL_EL1 exists for local fast IPIs (M1+) */
+static DEFINE_STATIC_KEY_TRUE(use_local_fast_ipi);
 
 struct aic_info {
 	int version;
@@ -252,6 +255,7 @@ struct aic_info {
 
 	/* Features */
 	bool fast_ipi;
+	bool local_fast_ipi;
 };
 
 static const struct aic_info aic1_info __initconst = {
@@ -270,17 +274,32 @@ static const struct aic_info aic1_fipi_info __initconst = {
 	.fast_ipi	= true,
 };
 
+static const struct aic_info aic1_local_fipi_info __initconst = {
+	.version	= 1,
+
+	.event		= AIC_EVENT,
+	.target_cpu	= AIC_TARGET_CPU,
+
+	.fast_ipi	= true,
+	.local_fast_ipi = true,
+};
+
 static const struct aic_info aic2_info __initconst = {
 	.version	= 2,
 
 	.irq_cfg	= AIC2_IRQ_CFG,
 
 	.fast_ipi	= true,
+	.local_fast_ipi = true,
 };
 
 static const struct of_device_id aic_info_match[] = {
 	{
 		.compatible = "apple,t8103-aic",
+		.data = &aic1_local_fipi_info,
+	},
+	{
+		.compatible = "apple,t8015-aic",
 		.data = &aic1_fipi_info,
 	},
 	{
@@ -532,14 +551,9 @@ static void __exception_irq_entry aic_handle_fiq(struct pt_regs *regs)
 	 * we check for everything here, even things we don't support yet.
 	 */
 
-	if (read_sysreg_s(SYS_IMP_APL_IPI_SR_EL1) & IPI_SR_PENDING) {
-		if (static_branch_likely(&use_fast_ipi)) {
-			aic_handle_ipi(regs);
-		} else {
-			pr_err_ratelimited("Fast IPI fired. Acking.\n");
-			write_sysreg_s(IPI_SR_PENDING, SYS_IMP_APL_IPI_SR_EL1);
-		}
-	}
+	if (static_branch_likely(&use_fast_ipi) &&
+	    (read_sysreg_s(SYS_IMP_APL_IPI_SR_EL1) & IPI_SR_PENDING))
+		aic_handle_ipi(regs);
 
 	if (TIMER_FIRING(read_sysreg(cntp_ctl_el0)))
 		generic_handle_domain_irq(aic_irqc->hw_domain,
@@ -574,8 +588,9 @@ static void __exception_irq_entry aic_handle_fiq(struct pt_regs *regs)
 					  AIC_FIQ_HWIRQ(irq));
 	}
 
-	if (FIELD_GET(UPMCR0_IMODE, read_sysreg_s(SYS_IMP_APL_UPMCR0_EL1)) == UPMCR0_IMODE_FIQ &&
-			(read_sysreg_s(SYS_IMP_APL_UPMSR_EL1) & UPMSR_IACT)) {
+	if (static_branch_likely(&use_fast_ipi) &&
+	    (FIELD_GET(UPMCR0_IMODE, read_sysreg_s(SYS_IMP_APL_UPMCR0_EL1)) == UPMCR0_IMODE_FIQ) &&
+	    (read_sysreg_s(SYS_IMP_APL_UPMSR_EL1) & UPMSR_IACT)) {
 		/* Same story with uncore PMCs */
 		pr_err_ratelimited("Uncore PMC FIQ fired. Masking.\n");
 		sysreg_clear_set_s(SYS_IMP_APL_UPMCR0_EL1, UPMCR0_IMODE,
@@ -750,12 +765,12 @@ static void aic_ipi_send_fast(int cpu)
 	u64 cluster = MPIDR_CLUSTER(mpidr);
 	u64 idx = MPIDR_CPU(mpidr);
 
-	if (MPIDR_CLUSTER(my_mpidr) == cluster)
-		write_sysreg_s(FIELD_PREP(IPI_RR_CPU, idx),
-			       SYS_IMP_APL_IPI_RR_LOCAL_EL1);
-	else
+	if (static_branch_likely(&use_local_fast_ipi) && MPIDR_CLUSTER(my_mpidr) == cluster) {
+		write_sysreg_s(FIELD_PREP(IPI_RR_CPU, idx), SYS_IMP_APL_IPI_RR_LOCAL_EL1);
+	} else {
 		write_sysreg_s(FIELD_PREP(IPI_RR_CPU, idx) | FIELD_PREP(IPI_RR_CLUSTER, cluster),
 			       SYS_IMP_APL_IPI_RR_GLOBAL_EL1);
+	}
 	isb();
 }
 
@@ -811,7 +826,8 @@ static int aic_init_cpu(unsigned int cpu)
 	/* Mask all hard-wired per-CPU IRQ/FIQ sources */
 
 	/* Pending Fast IPI FIQs */
-	write_sysreg_s(IPI_SR_PENDING, SYS_IMP_APL_IPI_SR_EL1);
+	if (static_branch_likely(&use_fast_ipi))
+		write_sysreg_s(IPI_SR_PENDING, SYS_IMP_APL_IPI_SR_EL1);
 
 	/* Timer FIQs */
 	sysreg_clear_set(cntp_ctl_el0, 0, ARCH_TIMER_CTRL_IT_MASK);
@@ -832,8 +848,10 @@ static int aic_init_cpu(unsigned int cpu)
 			   FIELD_PREP(PMCR0_IMODE, PMCR0_IMODE_OFF));
 
 	/* Uncore PMC FIQ */
-	sysreg_clear_set_s(SYS_IMP_APL_UPMCR0_EL1, UPMCR0_IMODE,
-			   FIELD_PREP(UPMCR0_IMODE, UPMCR0_IMODE_OFF));
+	if (static_branch_likely(&use_fast_ipi)) {
+		sysreg_clear_set_s(SYS_IMP_APL_UPMCR0_EL1, UPMCR0_IMODE,
+				   FIELD_PREP(UPMCR0_IMODE, UPMCR0_IMODE_OFF));
+	}
 
 	/* Commit all of the above */
 	isb();
@@ -987,11 +1005,12 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
 	off += sizeof(u32) * (irqc->max_irq >> 5); /* MASK_CLR */
 	off += sizeof(u32) * (irqc->max_irq >> 5); /* HW_STATE */
 
-	if (irqc->info.fast_ipi)
-		static_branch_enable(&use_fast_ipi);
-	else
+	if (!irqc->info.fast_ipi)
 		static_branch_disable(&use_fast_ipi);
 
+	if (!irqc->info.local_fast_ipi)
+		static_branch_disable(&use_local_fast_ipi);
+
 	irqc->info.die_stride = off - start_off;
 
 	irqc->hw_domain = irq_domain_create_tree(of_node_to_fwnode(node),
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index dce2b80bf439..d7c5ef248474 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Marvell Armada 370 and Armada XP SoC IRQ handling
  *
@@ -7,13 +8,11 @@
  * Gregory CLEMENT <gregory.clement@free-electrons.com>
  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  * Ben Dooks <ben.dooks@codethink.co.uk>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
+#include <linux/bitfield.h>
 #include <linux/bits.h>
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -66,19 +65,17 @@
  *                   device
  *
  * The "global interrupt mask/unmask" is modified using the
- * ARMADA_370_XP_INT_SET_ENABLE_OFFS and
- * ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS registers, which are relative
- * to "main_int_base".
+ * MPIC_INT_SET_ENABLE and MPIC_INT_CLEAR_ENABLE
+ * registers, which are relative to "mpic->base".
  *
- * The "per-CPU mask/unmask" is modified using the
- * ARMADA_370_XP_INT_SET_MASK_OFFS and
- * ARMADA_370_XP_INT_CLEAR_MASK_OFFS registers, which are relative to
- * "per_cpu_int_base". This base address points to a special address,
+ * The "per-CPU mask/unmask" is modified using the MPIC_INT_SET_MASK
+ * and MPIC_INT_CLEAR_MASK registers, which are relative to
+ * "mpic->per_cpu". This base address points to a special address,
  * which automatically accesses the registers of the current CPU.
  *
  * The per-CPU mask/unmask can also be adjusted using the global
- * per-interrupt ARMADA_370_XP_INT_SOURCE_CTL register, which we use
- * to configure interrupt affinity.
+ * per-interrupt MPIC_INT_SOURCE_CTL register, which we use to
+ * configure interrupt affinity.
  *
  * Due to this model, all interrupts need to be mask/unmasked at two
  * different levels: at the global level and at the per-CPU level.
@@ -92,9 +89,8 @@
  *    the current CPU, running the ->map() code. This allows to have
  *    the interrupt unmasked at this level in non-SMP
  *    configurations. In SMP configurations, the ->set_affinity()
- *    callback is called, which using the
- *    ARMADA_370_XP_INT_SOURCE_CTL() readjusts the per-CPU mask/unmask
- *    for the interrupt.
+ *    callback is called, which using the MPIC_INT_SOURCE_CTL()
+ *    readjusts the per-CPU mask/unmask for the interrupt.
  *
  *    The ->mask() and ->unmask() operations only mask/unmask the
  *    interrupt at the "global" level.
@@ -116,58 +112,84 @@
  *    at the per-CPU level.
  */
 
-/* Registers relative to main_int_base */
-#define ARMADA_370_XP_INT_CONTROL		(0x00)
-#define ARMADA_370_XP_SW_TRIG_INT_OFFS		(0x04)
-#define ARMADA_370_XP_INT_SET_ENABLE_OFFS	(0x30)
-#define ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS	(0x34)
-#define ARMADA_370_XP_INT_SOURCE_CTL(irq)	(0x100 + irq*4)
-#define ARMADA_370_XP_INT_SOURCE_CPU_MASK	0xF
-#define ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid)	((BIT(0) | BIT(8)) << cpuid)
-
-/* Registers relative to per_cpu_int_base */
-#define ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS	(0x08)
-#define ARMADA_370_XP_IN_DRBEL_MSK_OFFS		(0x0c)
-#define ARMADA_375_PPI_CAUSE			(0x10)
-#define ARMADA_370_XP_CPU_INTACK_OFFS		(0x44)
-#define ARMADA_370_XP_INT_SET_MASK_OFFS		(0x48)
-#define ARMADA_370_XP_INT_CLEAR_MASK_OFFS	(0x4C)
-#define ARMADA_370_XP_INT_FABRIC_MASK_OFFS	(0x54)
-#define ARMADA_370_XP_INT_CAUSE_PERF(cpu)	(1 << cpu)
-
-#define ARMADA_370_XP_MAX_PER_CPU_IRQS		(28)
+/* Registers relative to mpic->base */
+#define MPIC_INT_CONTROL			0x00
+#define MPIC_INT_CONTROL_NUMINT_MASK		GENMASK(12, 2)
+#define MPIC_SW_TRIG_INT			0x04
+#define MPIC_INT_SET_ENABLE			0x30
+#define MPIC_INT_CLEAR_ENABLE			0x34
+#define MPIC_INT_SOURCE_CTL(hwirq)		(0x100 + (hwirq) * 4)
+#define MPIC_INT_SOURCE_CPU_MASK		GENMASK(3, 0)
+#define MPIC_INT_IRQ_FIQ_MASK(cpuid)		((BIT(0) | BIT(8)) << (cpuid))
+
+/* Registers relative to mpic->per_cpu */
+#define MPIC_IN_DRBEL_CAUSE			0x08
+#define MPIC_IN_DRBEL_MASK			0x0c
+#define MPIC_PPI_CAUSE				0x10
+#define MPIC_CPU_INTACK				0x44
+#define MPIC_CPU_INTACK_IID_MASK		GENMASK(9, 0)
+#define MPIC_INT_SET_MASK			0x48
+#define MPIC_INT_CLEAR_MASK			0x4C
+#define MPIC_INT_FABRIC_MASK			0x54
+#define MPIC_INT_CAUSE_PERF(cpu)		BIT(cpu)
+
+#define MPIC_PER_CPU_IRQS_NR			29
 
 /* IPI and MSI interrupt definitions for IPI platforms */
-#define IPI_DOORBELL_START                      (0)
-#define IPI_DOORBELL_END                        (8)
-#define IPI_DOORBELL_MASK                       0xFF
-#define PCI_MSI_DOORBELL_START                  (16)
-#define PCI_MSI_DOORBELL_NR                     (16)
-#define PCI_MSI_DOORBELL_END                    (32)
-#define PCI_MSI_DOORBELL_MASK                   0xFFFF0000
+#define IPI_DOORBELL_NR				8
+#define IPI_DOORBELL_MASK			GENMASK(7, 0)
+#define PCI_MSI_DOORBELL_START			16
+#define PCI_MSI_DOORBELL_NR			16
+#define PCI_MSI_DOORBELL_MASK			GENMASK(31, 16)
 
 /* MSI interrupt definitions for non-IPI platforms */
 #define PCI_MSI_FULL_DOORBELL_START		0
 #define PCI_MSI_FULL_DOORBELL_NR		32
-#define PCI_MSI_FULL_DOORBELL_END		32
 #define PCI_MSI_FULL_DOORBELL_MASK		GENMASK(31, 0)
 #define PCI_MSI_FULL_DOORBELL_SRC0_MASK		GENMASK(15, 0)
 #define PCI_MSI_FULL_DOORBELL_SRC1_MASK		GENMASK(31, 16)
 
-static void __iomem *per_cpu_int_base;
-static void __iomem *main_int_base;
-static struct irq_domain *armada_370_xp_mpic_domain;
-static u32 doorbell_mask_reg;
-static int parent_irq;
+/**
+ * struct mpic - MPIC private data structure
+ * @base:		MPIC registers base address
+ * @per_cpu:		per-CPU registers base address
+ * @parent_irq:		parent IRQ if MPIC is not top-level interrupt controller
+ * @domain:		MPIC main interrupt domain
+ * @ipi_domain:		IPI domain
+ * @msi_domain:		MSI domain
+ * @msi_inner_domain:	MSI inner domain
+ * @msi_used:		bitmap of used MSI numbers
+ * @msi_lock:		mutex serializing access to @msi_used
+ * @msi_doorbell_addr:	physical address of MSI doorbell register
+ * @msi_doorbell_mask:	mask of available doorbell bits for MSIs (either PCI_MSI_DOORBELL_MASK or
+ *			PCI_MSI_FULL_DOORBELL_MASK)
+ * @msi_doorbell_start:	first set bit in @msi_doorbell_mask
+ * @msi_doorbell_size:	number of set bits in @msi_doorbell_mask
+ * @doorbell_mask:	doorbell mask of MSIs and IPIs, stored on suspend, restored on resume
+ */
+struct mpic {
+	void __iomem *base;
+	void __iomem *per_cpu;
+	int parent_irq;
+	struct irq_domain *domain;
+#ifdef CONFIG_SMP
+	struct irq_domain *ipi_domain;
+#endif
 #ifdef CONFIG_PCI_MSI
-static struct irq_domain *armada_370_xp_msi_domain;
-static struct irq_domain *armada_370_xp_msi_inner_domain;
-static DECLARE_BITMAP(msi_used, PCI_MSI_FULL_DOORBELL_NR);
-static DEFINE_MUTEX(msi_used_lock);
-static phys_addr_t msi_doorbell_addr;
+	struct irq_domain *msi_domain;
+	struct irq_domain *msi_inner_domain;
+	DECLARE_BITMAP(msi_used, PCI_MSI_FULL_DOORBELL_NR);
+	struct mutex msi_lock;
+	phys_addr_t msi_doorbell_addr;
+	u32 msi_doorbell_mask;
+	unsigned int msi_doorbell_start, msi_doorbell_size;
 #endif
+	u32 doorbell_mask;
+};
+
+static struct mpic *mpic_data __ro_after_init;
 
-static inline bool is_ipi_available(void)
+static inline bool mpic_is_ipi_available(struct mpic *mpic)
 {
 	/*
 	 * We distinguish IPI availability in the IC by the IC not having a
@@ -175,39 +197,12 @@ static inline bool is_ipi_available(void)
 	 * interrupt controller (e.g. GIC) that takes care of inter-processor
 	 * interrupts.
 	 */
-	return parent_irq <= 0;
-}
-
-static inline u32 msi_doorbell_mask(void)
-{
-	return is_ipi_available() ? PCI_MSI_DOORBELL_MASK :
-				    PCI_MSI_FULL_DOORBELL_MASK;
-}
-
-static inline unsigned int msi_doorbell_start(void)
-{
-	return is_ipi_available() ? PCI_MSI_DOORBELL_START :
-				    PCI_MSI_FULL_DOORBELL_START;
+	return mpic->parent_irq <= 0;
 }
 
-static inline unsigned int msi_doorbell_size(void)
+static inline bool mpic_is_percpu_irq(irq_hw_number_t hwirq)
 {
-	return is_ipi_available() ? PCI_MSI_DOORBELL_NR :
-				    PCI_MSI_FULL_DOORBELL_NR;
-}
-
-static inline unsigned int msi_doorbell_end(void)
-{
-	return is_ipi_available() ? PCI_MSI_DOORBELL_END :
-				    PCI_MSI_FULL_DOORBELL_END;
-}
-
-static inline bool is_percpu_irq(irq_hw_number_t irq)
-{
-	if (irq <= ARMADA_370_XP_MAX_PER_CPU_IRQS)
-		return true;
-
-	return false;
+	return hwirq < MPIC_PER_CPU_IRQS_NR;
 }
 
 /*
@@ -215,55 +210,53 @@ static inline bool is_percpu_irq(irq_hw_number_t irq)
  * For shared global interrupts, mask/unmask global enable bit
  * For CPU interrupts, mask/unmask the calling CPU's bit
  */
-static void armada_370_xp_irq_mask(struct irq_data *d)
+static void mpic_irq_mask(struct irq_data *d)
 {
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
 	irq_hw_number_t hwirq = irqd_to_hwirq(d);
 
-	if (!is_percpu_irq(hwirq))
-		writel(hwirq, main_int_base +
-				ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS);
+	if (!mpic_is_percpu_irq(hwirq))
+		writel(hwirq, mpic->base + MPIC_INT_CLEAR_ENABLE);
 	else
-		writel(hwirq, per_cpu_int_base +
-				ARMADA_370_XP_INT_SET_MASK_OFFS);
+		writel(hwirq, mpic->per_cpu + MPIC_INT_SET_MASK);
 }
 
-static void armada_370_xp_irq_unmask(struct irq_data *d)
+static void mpic_irq_unmask(struct irq_data *d)
 {
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
 	irq_hw_number_t hwirq = irqd_to_hwirq(d);
 
-	if (!is_percpu_irq(hwirq))
-		writel(hwirq, main_int_base +
-				ARMADA_370_XP_INT_SET_ENABLE_OFFS);
+	if (!mpic_is_percpu_irq(hwirq))
+		writel(hwirq, mpic->base + MPIC_INT_SET_ENABLE);
 	else
-		writel(hwirq, per_cpu_int_base +
-				ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+		writel(hwirq, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 }
 
 #ifdef CONFIG_PCI_MSI
 
-static struct irq_chip armada_370_xp_msi_irq_chip = {
-	.name = "MPIC MSI",
-	.irq_mask = pci_msi_mask_irq,
-	.irq_unmask = pci_msi_unmask_irq,
+static struct irq_chip mpic_msi_irq_chip = {
+	.name		= "MPIC MSI",
+	.irq_mask	= pci_msi_mask_irq,
+	.irq_unmask	= pci_msi_unmask_irq,
 };
 
-static struct msi_domain_info armada_370_xp_msi_domain_info = {
+static struct msi_domain_info mpic_msi_domain_info = {
 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
 		   MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
-	.chip	= &armada_370_xp_msi_irq_chip,
+	.chip	= &mpic_msi_irq_chip,
 };
 
-static void armada_370_xp_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+static void mpic_compose_msi_msg(struct irq_data *d, struct msi_msg *msg)
 {
-	unsigned int cpu = cpumask_first(irq_data_get_effective_affinity_mask(data));
+	unsigned int cpu = cpumask_first(irq_data_get_effective_affinity_mask(d));
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
 
-	msg->address_lo = lower_32_bits(msi_doorbell_addr);
-	msg->address_hi = upper_32_bits(msi_doorbell_addr);
-	msg->data = BIT(cpu + 8) | (data->hwirq + msi_doorbell_start());
+	msg->address_lo = lower_32_bits(mpic->msi_doorbell_addr);
+	msg->address_hi = upper_32_bits(mpic->msi_doorbell_addr);
+	msg->data = BIT(cpu + 8) | (d->hwirq + mpic->msi_doorbell_start);
 }
 
-static int armada_370_xp_msi_set_affinity(struct irq_data *irq_data,
-					  const struct cpumask *mask, bool force)
+static int mpic_msi_set_affinity(struct irq_data *d, const struct cpumask *mask, bool force)
 {
 	unsigned int cpu;
 
@@ -275,33 +268,34 @@ static int armada_370_xp_msi_set_affinity(struct irq_data *irq_data,
 	if (cpu >= nr_cpu_ids)
 		return -EINVAL;
 
-	irq_data_update_effective_affinity(irq_data, cpumask_of(cpu));
+	irq_data_update_effective_affinity(d, cpumask_of(cpu));
 
 	return IRQ_SET_MASK_OK;
 }
 
-static struct irq_chip armada_370_xp_msi_bottom_irq_chip = {
+static struct irq_chip mpic_msi_bottom_irq_chip = {
 	.name			= "MPIC MSI",
-	.irq_compose_msi_msg	= armada_370_xp_compose_msi_msg,
-	.irq_set_affinity	= armada_370_xp_msi_set_affinity,
+	.irq_compose_msi_msg	= mpic_compose_msi_msg,
+	.irq_set_affinity	= mpic_msi_set_affinity,
 };
 
-static int armada_370_xp_msi_alloc(struct irq_domain *domain, unsigned int virq,
-				   unsigned int nr_irqs, void *args)
+static int mpic_msi_alloc(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs,
+			  void *args)
 {
-	int hwirq, i;
+	struct mpic *mpic = domain->host_data;
+	int hwirq;
 
-	mutex_lock(&msi_used_lock);
-	hwirq = bitmap_find_free_region(msi_used, msi_doorbell_size(),
+	mutex_lock(&mpic->msi_lock);
+	hwirq = bitmap_find_free_region(mpic->msi_used, mpic->msi_doorbell_size,
 					order_base_2(nr_irqs));
-	mutex_unlock(&msi_used_lock);
+	mutex_unlock(&mpic->msi_lock);
 
 	if (hwirq < 0)
 		return -ENOSPC;
 
-	for (i = 0; i < nr_irqs; i++) {
+	for (unsigned int i = 0; i < nr_irqs; i++) {
 		irq_domain_set_info(domain, virq + i, hwirq + i,
-				    &armada_370_xp_msi_bottom_irq_chip,
+				    &mpic_msi_bottom_irq_chip,
 				    domain->host_data, handle_simple_irq,
 				    NULL, NULL);
 	}
@@ -309,76 +303,84 @@ static int armada_370_xp_msi_alloc(struct irq_domain *domain, unsigned int virq,
 	return 0;
 }
 
-static void armada_370_xp_msi_free(struct irq_domain *domain,
-				   unsigned int virq, unsigned int nr_irqs)
+static void mpic_msi_free(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs)
 {
 	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+	struct mpic *mpic = domain->host_data;
 
-	mutex_lock(&msi_used_lock);
-	bitmap_release_region(msi_used, d->hwirq, order_base_2(nr_irqs));
-	mutex_unlock(&msi_used_lock);
+	mutex_lock(&mpic->msi_lock);
+	bitmap_release_region(mpic->msi_used, d->hwirq, order_base_2(nr_irqs));
+	mutex_unlock(&mpic->msi_lock);
 }
 
-static const struct irq_domain_ops armada_370_xp_msi_domain_ops = {
-	.alloc	= armada_370_xp_msi_alloc,
-	.free	= armada_370_xp_msi_free,
+static const struct irq_domain_ops mpic_msi_domain_ops = {
+	.alloc	= mpic_msi_alloc,
+	.free	= mpic_msi_free,
 };
 
-static void armada_370_xp_msi_reenable_percpu(void)
+static void mpic_msi_reenable_percpu(struct mpic *mpic)
 {
 	u32 reg;
 
 	/* Enable MSI doorbell mask and combined cpu local interrupt */
-	reg = readl(per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
-	reg |= msi_doorbell_mask();
-	writel(reg, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+	reg = readl(mpic->per_cpu + MPIC_IN_DRBEL_MASK);
+	reg |= mpic->msi_doorbell_mask;
+	writel(reg, mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 
 	/* Unmask local doorbell interrupt */
-	writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+	writel(1, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 }
 
-static int armada_370_xp_msi_init(struct device_node *node,
-				  phys_addr_t main_int_phys_base)
+static int __init mpic_msi_init(struct mpic *mpic, struct device_node *node,
+				phys_addr_t main_int_phys_base)
 {
-	msi_doorbell_addr = main_int_phys_base +
-		ARMADA_370_XP_SW_TRIG_INT_OFFS;
+	mpic->msi_doorbell_addr = main_int_phys_base + MPIC_SW_TRIG_INT;
+
+	mutex_init(&mpic->msi_lock);
+
+	if (mpic_is_ipi_available(mpic)) {
+		mpic->msi_doorbell_start = PCI_MSI_DOORBELL_START;
+		mpic->msi_doorbell_size = PCI_MSI_DOORBELL_NR;
+		mpic->msi_doorbell_mask = PCI_MSI_DOORBELL_MASK;
+	} else {
+		mpic->msi_doorbell_start = PCI_MSI_FULL_DOORBELL_START;
+		mpic->msi_doorbell_size = PCI_MSI_FULL_DOORBELL_NR;
+		mpic->msi_doorbell_mask = PCI_MSI_FULL_DOORBELL_MASK;
+	}
 
-	armada_370_xp_msi_inner_domain =
-		irq_domain_add_linear(NULL, msi_doorbell_size(),
-				      &armada_370_xp_msi_domain_ops, NULL);
-	if (!armada_370_xp_msi_inner_domain)
+	mpic->msi_inner_domain = irq_domain_add_linear(NULL, mpic->msi_doorbell_size,
+						       &mpic_msi_domain_ops, mpic);
+	if (!mpic->msi_inner_domain)
 		return -ENOMEM;
 
-	armada_370_xp_msi_domain =
-		pci_msi_create_irq_domain(of_node_to_fwnode(node),
-					  &armada_370_xp_msi_domain_info,
-					  armada_370_xp_msi_inner_domain);
-	if (!armada_370_xp_msi_domain) {
-		irq_domain_remove(armada_370_xp_msi_inner_domain);
+	mpic->msi_domain = pci_msi_create_irq_domain(of_node_to_fwnode(node), &mpic_msi_domain_info,
+						     mpic->msi_inner_domain);
+	if (!mpic->msi_domain) {
+		irq_domain_remove(mpic->msi_inner_domain);
 		return -ENOMEM;
 	}
 
-	armada_370_xp_msi_reenable_percpu();
+	mpic_msi_reenable_percpu(mpic);
 
 	/* Unmask low 16 MSI irqs on non-IPI platforms */
-	if (!is_ipi_available())
-		writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+	if (!mpic_is_ipi_available(mpic))
+		writel(0, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 
 	return 0;
 }
 #else
-static __maybe_unused void armada_370_xp_msi_reenable_percpu(void) {}
+static __maybe_unused void mpic_msi_reenable_percpu(struct mpic *mpic) {}
 
-static inline int armada_370_xp_msi_init(struct device_node *node,
-					 phys_addr_t main_int_phys_base)
+static inline int mpic_msi_init(struct mpic *mpic, struct device_node *node,
+				phys_addr_t main_int_phys_base)
 {
 	return 0;
 }
 #endif
 
-static void armada_xp_mpic_perf_init(void)
+static void mpic_perf_init(struct mpic *mpic)
 {
-	unsigned long cpuid;
+	u32 cpuid;
 
 	/*
 	 * This Performance Counter Overflow interrupt is specific for
@@ -390,38 +392,39 @@ static void armada_xp_mpic_perf_init(void)
 	cpuid = cpu_logical_map(smp_processor_id());
 
 	/* Enable Performance Counter Overflow interrupts */
-	writel(ARMADA_370_XP_INT_CAUSE_PERF(cpuid),
-	       per_cpu_int_base + ARMADA_370_XP_INT_FABRIC_MASK_OFFS);
+	writel(MPIC_INT_CAUSE_PERF(cpuid), mpic->per_cpu + MPIC_INT_FABRIC_MASK);
 }
 
 #ifdef CONFIG_SMP
-static struct irq_domain *ipi_domain;
-
-static void armada_370_xp_ipi_mask(struct irq_data *d)
+static void mpic_ipi_mask(struct irq_data *d)
 {
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
 	u32 reg;
-	reg = readl(per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+
+	reg = readl(mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 	reg &= ~BIT(d->hwirq);
-	writel(reg, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+	writel(reg, mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 }
 
-static void armada_370_xp_ipi_unmask(struct irq_data *d)
+static void mpic_ipi_unmask(struct irq_data *d)
 {
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
 	u32 reg;
-	reg = readl(per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+
+	reg = readl(mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 	reg |= BIT(d->hwirq);
-	writel(reg, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+	writel(reg, mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 }
 
-static void armada_370_xp_ipi_send_mask(struct irq_data *d,
-					const struct cpumask *mask)
+static void mpic_ipi_send_mask(struct irq_data *d, const struct cpumask *mask)
 {
-	unsigned long map = 0;
-	int cpu;
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
+	unsigned int cpu;
+	u32 map = 0;
 
 	/* Convert our logical CPU mask into a physical one. */
 	for_each_cpu(cpu, mask)
-		map |= 1 << cpu_logical_map(cpu);
+		map |= BIT(cpu_logical_map(cpu));
 
 	/*
 	 * Ensure that stores to Normal memory are visible to the
@@ -430,451 +433,465 @@ static void armada_370_xp_ipi_send_mask(struct irq_data *d,
 	dsb();
 
 	/* submit softirq */
-	writel((map << 8) | d->hwirq, main_int_base +
-		ARMADA_370_XP_SW_TRIG_INT_OFFS);
+	writel((map << 8) | d->hwirq, mpic->base + MPIC_SW_TRIG_INT);
 }
 
-static void armada_370_xp_ipi_ack(struct irq_data *d)
+static void mpic_ipi_ack(struct irq_data *d)
 {
-	writel(~BIT(d->hwirq), per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
+
+	writel(~BIT(d->hwirq), mpic->per_cpu + MPIC_IN_DRBEL_CAUSE);
 }
 
-static struct irq_chip ipi_irqchip = {
+static struct irq_chip mpic_ipi_irqchip = {
 	.name		= "IPI",
-	.irq_ack	= armada_370_xp_ipi_ack,
-	.irq_mask	= armada_370_xp_ipi_mask,
-	.irq_unmask	= armada_370_xp_ipi_unmask,
-	.ipi_send_mask	= armada_370_xp_ipi_send_mask,
+	.irq_ack	= mpic_ipi_ack,
+	.irq_mask	= mpic_ipi_mask,
+	.irq_unmask	= mpic_ipi_unmask,
+	.ipi_send_mask	= mpic_ipi_send_mask,
 };
 
-static int armada_370_xp_ipi_alloc(struct irq_domain *d,
-					 unsigned int virq,
-					 unsigned int nr_irqs, void *args)
+static int mpic_ipi_alloc(struct irq_domain *d, unsigned int virq,
+			  unsigned int nr_irqs, void *args)
 {
-	int i;
-
-	for (i = 0; i < nr_irqs; i++) {
+	for (unsigned int i = 0; i < nr_irqs; i++) {
 		irq_set_percpu_devid(virq + i);
-		irq_domain_set_info(d, virq + i, i, &ipi_irqchip,
-				    d->host_data,
-				    handle_percpu_devid_irq,
-				    NULL, NULL);
+		irq_domain_set_info(d, virq + i, i, &mpic_ipi_irqchip, d->host_data,
+				    handle_percpu_devid_irq, NULL, NULL);
 	}
 
 	return 0;
 }
 
-static void armada_370_xp_ipi_free(struct irq_domain *d,
-					 unsigned int virq,
-					 unsigned int nr_irqs)
+static void mpic_ipi_free(struct irq_domain *d, unsigned int virq,
+			  unsigned int nr_irqs)
 {
 	/* Not freeing IPIs */
 }
 
-static const struct irq_domain_ops ipi_domain_ops = {
-	.alloc	= armada_370_xp_ipi_alloc,
-	.free	= armada_370_xp_ipi_free,
+static const struct irq_domain_ops mpic_ipi_domain_ops = {
+	.alloc	= mpic_ipi_alloc,
+	.free	= mpic_ipi_free,
 };
 
-static void ipi_resume(void)
+static void mpic_ipi_resume(struct mpic *mpic)
 {
-	int i;
-
-	for (i = 0; i < IPI_DOORBELL_END; i++) {
-		int irq;
+	for (irq_hw_number_t i = 0; i < IPI_DOORBELL_NR; i++) {
+		unsigned int virq = irq_find_mapping(mpic->ipi_domain, i);
+		struct irq_data *d;
 
-		irq = irq_find_mapping(ipi_domain, i);
-		if (irq <= 0)
+		if (!virq || !irq_percpu_is_enabled(virq))
 			continue;
-		if (irq_percpu_is_enabled(irq)) {
-			struct irq_data *d;
-			d = irq_domain_get_irq_data(ipi_domain, irq);
-			armada_370_xp_ipi_unmask(d);
-		}
+
+		d = irq_domain_get_irq_data(mpic->ipi_domain, virq);
+		mpic_ipi_unmask(d);
 	}
 }
 
-static __init void armada_xp_ipi_init(struct device_node *node)
+static int __init mpic_ipi_init(struct mpic *mpic, struct device_node *node)
 {
 	int base_ipi;
 
-	ipi_domain = irq_domain_create_linear(of_node_to_fwnode(node),
-					      IPI_DOORBELL_END,
-					      &ipi_domain_ops, NULL);
-	if (WARN_ON(!ipi_domain))
-		return;
+	mpic->ipi_domain = irq_domain_create_linear(of_node_to_fwnode(node), IPI_DOORBELL_NR,
+						    &mpic_ipi_domain_ops, mpic);
+	if (WARN_ON(!mpic->ipi_domain))
+		return -ENOMEM;
 
-	irq_domain_update_bus_token(ipi_domain, DOMAIN_BUS_IPI);
-	base_ipi = irq_domain_alloc_irqs(ipi_domain, IPI_DOORBELL_END, NUMA_NO_NODE, NULL);
+	irq_domain_update_bus_token(mpic->ipi_domain, DOMAIN_BUS_IPI);
+	base_ipi = irq_domain_alloc_irqs(mpic->ipi_domain, IPI_DOORBELL_NR, NUMA_NO_NODE, NULL);
 	if (WARN_ON(!base_ipi))
-		return;
+		return -ENOMEM;
+
+	set_smp_ipi_range(base_ipi, IPI_DOORBELL_NR);
 
-	set_smp_ipi_range(base_ipi, IPI_DOORBELL_END);
+	return 0;
 }
 
-static int armada_xp_set_affinity(struct irq_data *d,
-				  const struct cpumask *mask_val, bool force)
+static int mpic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, bool force)
 {
+	struct mpic *mpic = irq_data_get_irq_chip_data(d);
 	irq_hw_number_t hwirq = irqd_to_hwirq(d);
-	int cpu;
+	unsigned int cpu;
 
 	/* Select a single core from the affinity mask which is online */
 	cpu = cpumask_any_and(mask_val, cpu_online_mask);
 
-	atomic_io_modify(main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq),
-			 ARMADA_370_XP_INT_SOURCE_CPU_MASK,
-			 BIT(cpu_logical_map(cpu)));
+	atomic_io_modify(mpic->base + MPIC_INT_SOURCE_CTL(hwirq),
+			 MPIC_INT_SOURCE_CPU_MASK, BIT(cpu_logical_map(cpu)));
 
 	irq_data_update_effective_affinity(d, cpumask_of(cpu));
 
 	return IRQ_SET_MASK_OK;
 }
 
-static void armada_xp_mpic_smp_cpu_init(void)
+static void mpic_smp_cpu_init(struct mpic *mpic)
 {
-	u32 control;
-	int nr_irqs, i;
-
-	control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL);
-	nr_irqs = (control >> 2) & 0x3ff;
+	for (irq_hw_number_t i = 0; i < mpic->domain->hwirq_max; i++)
+		writel(i, mpic->per_cpu + MPIC_INT_SET_MASK);
 
-	for (i = 0; i < nr_irqs; i++)
-		writel(i, per_cpu_int_base + ARMADA_370_XP_INT_SET_MASK_OFFS);
-
-	if (!is_ipi_available())
+	if (!mpic_is_ipi_available(mpic))
 		return;
 
 	/* Disable all IPIs */
-	writel(0, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+	writel(0, mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 
 	/* Clear pending IPIs */
-	writel(0, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+	writel(0, mpic->per_cpu + MPIC_IN_DRBEL_CAUSE);
 
 	/* Unmask IPI interrupt */
-	writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+	writel(0, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 }
 
-static void armada_xp_mpic_reenable_percpu(void)
+static void mpic_reenable_percpu(struct mpic *mpic)
 {
-	unsigned int irq;
-
 	/* Re-enable per-CPU interrupts that were enabled before suspend */
-	for (irq = 0; irq < ARMADA_370_XP_MAX_PER_CPU_IRQS; irq++) {
-		struct irq_data *data;
-		int virq;
-
-		virq = irq_linear_revmap(armada_370_xp_mpic_domain, irq);
-		if (virq == 0)
-			continue;
-
-		data = irq_get_irq_data(virq);
+	for (irq_hw_number_t i = 0; i < MPIC_PER_CPU_IRQS_NR; i++) {
+		unsigned int virq = irq_linear_revmap(mpic->domain, i);
+		struct irq_data *d;
 
-		if (!irq_percpu_is_enabled(virq))
+		if (!virq || !irq_percpu_is_enabled(virq))
 			continue;
 
-		armada_370_xp_irq_unmask(data);
+		d = irq_get_irq_data(virq);
+		mpic_irq_unmask(d);
 	}
 
-	if (is_ipi_available())
-		ipi_resume();
+	if (mpic_is_ipi_available(mpic))
+		mpic_ipi_resume(mpic);
 
-	armada_370_xp_msi_reenable_percpu();
+	mpic_msi_reenable_percpu(mpic);
 }
 
-static int armada_xp_mpic_starting_cpu(unsigned int cpu)
+static int mpic_starting_cpu(unsigned int cpu)
 {
-	armada_xp_mpic_perf_init();
-	armada_xp_mpic_smp_cpu_init();
-	armada_xp_mpic_reenable_percpu();
+	struct mpic *mpic = irq_get_default_host()->host_data;
+
+	mpic_perf_init(mpic);
+	mpic_smp_cpu_init(mpic);
+	mpic_reenable_percpu(mpic);
+
 	return 0;
 }
 
 static int mpic_cascaded_starting_cpu(unsigned int cpu)
 {
-	armada_xp_mpic_perf_init();
-	armada_xp_mpic_reenable_percpu();
-	enable_percpu_irq(parent_irq, IRQ_TYPE_NONE);
+	struct mpic *mpic = mpic_data;
+
+	mpic_perf_init(mpic);
+	mpic_reenable_percpu(mpic);
+	enable_percpu_irq(mpic->parent_irq, IRQ_TYPE_NONE);
+
 	return 0;
 }
 #else
-static void armada_xp_mpic_smp_cpu_init(void) {}
-static void ipi_resume(void) {}
+static void mpic_smp_cpu_init(struct mpic *mpic) {}
+static void mpic_ipi_resume(struct mpic *mpic) {}
 #endif
 
-static struct irq_chip armada_370_xp_irq_chip = {
+static struct irq_chip mpic_irq_chip = {
 	.name		= "MPIC",
-	.irq_mask       = armada_370_xp_irq_mask,
-	.irq_mask_ack   = armada_370_xp_irq_mask,
-	.irq_unmask     = armada_370_xp_irq_unmask,
+	.irq_mask	= mpic_irq_mask,
+	.irq_mask_ack	= mpic_irq_mask,
+	.irq_unmask	= mpic_irq_unmask,
 #ifdef CONFIG_SMP
-	.irq_set_affinity = armada_xp_set_affinity,
+	.irq_set_affinity = mpic_set_affinity,
 #endif
 	.flags		= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
 };
 
-static int armada_370_xp_mpic_irq_map(struct irq_domain *h,
-				      unsigned int virq, irq_hw_number_t hw)
+static int mpic_irq_map(struct irq_domain *domain, unsigned int virq, irq_hw_number_t hwirq)
 {
+	struct mpic *mpic = domain->host_data;
+
 	/* IRQs 0 and 1 cannot be mapped, they are handled internally */
-	if (hw <= 1)
+	if (hwirq <= 1)
 		return -EINVAL;
 
-	armada_370_xp_irq_mask(irq_get_irq_data(virq));
-	if (!is_percpu_irq(hw))
-		writel(hw, per_cpu_int_base +
-			ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+	irq_set_chip_data(virq, mpic);
+
+	mpic_irq_mask(irq_get_irq_data(virq));
+	if (!mpic_is_percpu_irq(hwirq))
+		writel(hwirq, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 	else
-		writel(hw, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS);
+		writel(hwirq, mpic->base + MPIC_INT_SET_ENABLE);
 	irq_set_status_flags(virq, IRQ_LEVEL);
 
-	if (is_percpu_irq(hw)) {
+	if (mpic_is_percpu_irq(hwirq)) {
 		irq_set_percpu_devid(virq);
-		irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip,
-					handle_percpu_devid_irq);
+		irq_set_chip_and_handler(virq, &mpic_irq_chip, handle_percpu_devid_irq);
 	} else {
-		irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip,
-					handle_level_irq);
+		irq_set_chip_and_handler(virq, &mpic_irq_chip, handle_level_irq);
 		irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq)));
 	}
 	irq_set_probe(virq);
-
 	return 0;
 }
 
-static const struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
-	.map = armada_370_xp_mpic_irq_map,
-	.xlate = irq_domain_xlate_onecell,
+static const struct irq_domain_ops mpic_irq_ops = {
+	.map	= mpic_irq_map,
+	.xlate	= irq_domain_xlate_onecell,
 };
 
 #ifdef CONFIG_PCI_MSI
-static void armada_370_xp_handle_msi_irq(struct pt_regs *regs, bool is_chained)
+static void mpic_handle_msi_irq(struct mpic *mpic)
 {
-	u32 msimask, msinr;
-
-	msimask = readl_relaxed(per_cpu_int_base +
-				ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
-	msimask &= msi_doorbell_mask();
+	unsigned long cause;
+	unsigned int i;
 
-	writel(~msimask, per_cpu_int_base +
-	       ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+	cause = readl_relaxed(mpic->per_cpu + MPIC_IN_DRBEL_CAUSE);
+	cause &= mpic->msi_doorbell_mask;
+	writel(~cause, mpic->per_cpu + MPIC_IN_DRBEL_CAUSE);
 
-	for (msinr = msi_doorbell_start();
-	     msinr < msi_doorbell_end(); msinr++) {
-		unsigned int irq;
+	for_each_set_bit(i, &cause, BITS_PER_LONG)
+		generic_handle_domain_irq(mpic->msi_inner_domain, i - mpic->msi_doorbell_start);
+}
+#else
+static void mpic_handle_msi_irq(struct mpic *mpic) {}
+#endif
 
-		if (!(msimask & BIT(msinr)))
-			continue;
+#ifdef CONFIG_SMP
+static void mpic_handle_ipi_irq(struct mpic *mpic)
+{
+	unsigned long cause;
+	irq_hw_number_t i;
 
-		irq = msinr - msi_doorbell_start();
+	cause = readl_relaxed(mpic->per_cpu + MPIC_IN_DRBEL_CAUSE);
+	cause &= IPI_DOORBELL_MASK;
 
-		generic_handle_domain_irq(armada_370_xp_msi_inner_domain, irq);
-	}
+	for_each_set_bit(i, &cause, IPI_DOORBELL_NR)
+		generic_handle_domain_irq(mpic->ipi_domain, i);
 }
 #else
-static void armada_370_xp_handle_msi_irq(struct pt_regs *r, bool b) {}
+static inline void mpic_handle_ipi_irq(struct mpic *mpic) {}
 #endif
 
-static void armada_370_xp_mpic_handle_cascade_irq(struct irq_desc *desc)
+static void mpic_handle_cascade_irq(struct irq_desc *desc)
 {
+	struct mpic *mpic = irq_desc_get_handler_data(desc);
 	struct irq_chip *chip = irq_desc_get_chip(desc);
-	unsigned long irqmap, irqn, irqsrc, cpuid;
+	unsigned long cause;
+	u32 irqsrc, cpuid;
+	irq_hw_number_t i;
 
 	chained_irq_enter(chip, desc);
 
-	irqmap = readl_relaxed(per_cpu_int_base + ARMADA_375_PPI_CAUSE);
+	cause = readl_relaxed(mpic->per_cpu + MPIC_PPI_CAUSE);
 	cpuid = cpu_logical_map(smp_processor_id());
 
-	for_each_set_bit(irqn, &irqmap, BITS_PER_LONG) {
-		irqsrc = readl_relaxed(main_int_base +
-				       ARMADA_370_XP_INT_SOURCE_CTL(irqn));
+	for_each_set_bit(i, &cause, MPIC_PER_CPU_IRQS_NR) {
+		irqsrc = readl_relaxed(mpic->base + MPIC_INT_SOURCE_CTL(i));
 
 		/* Check if the interrupt is not masked on current CPU.
 		 * Test IRQ (0-1) and FIQ (8-9) mask bits.
 		 */
-		if (!(irqsrc & ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid)))
+		if (!(irqsrc & MPIC_INT_IRQ_FIQ_MASK(cpuid)))
 			continue;
 
-		if (irqn == 0 || irqn == 1) {
-			armada_370_xp_handle_msi_irq(NULL, true);
+		if (i == 0 || i == 1) {
+			mpic_handle_msi_irq(mpic);
 			continue;
 		}
 
-		generic_handle_domain_irq(armada_370_xp_mpic_domain, irqn);
+		generic_handle_domain_irq(mpic->domain, i);
 	}
 
 	chained_irq_exit(chip, desc);
 }
 
-static void __exception_irq_entry
-armada_370_xp_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry mpic_handle_irq(struct pt_regs *regs)
 {
-	u32 irqstat, irqnr;
+	struct mpic *mpic = irq_get_default_host()->host_data;
+	irq_hw_number_t i;
+	u32 irqstat;
 
 	do {
-		irqstat = readl_relaxed(per_cpu_int_base +
-					ARMADA_370_XP_CPU_INTACK_OFFS);
-		irqnr = irqstat & 0x3FF;
+		irqstat = readl_relaxed(mpic->per_cpu + MPIC_CPU_INTACK);
+		i = FIELD_GET(MPIC_CPU_INTACK_IID_MASK, irqstat);
 
-		if (irqnr > 1022)
+		if (i > 1022)
 			break;
 
-		if (irqnr > 1) {
-			generic_handle_domain_irq(armada_370_xp_mpic_domain,
-						  irqnr);
-			continue;
-		}
+		if (i > 1)
+			generic_handle_domain_irq(mpic->domain, i);
 
 		/* MSI handling */
-		if (irqnr == 1)
-			armada_370_xp_handle_msi_irq(regs, false);
+		if (i == 1)
+			mpic_handle_msi_irq(mpic);
 
-#ifdef CONFIG_SMP
 		/* IPI Handling */
-		if (irqnr == 0) {
-			unsigned long ipimask;
-			int ipi;
-
-			ipimask = readl_relaxed(per_cpu_int_base +
-						ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS)
-				& IPI_DOORBELL_MASK;
-
-			for_each_set_bit(ipi, &ipimask, IPI_DOORBELL_END)
-				generic_handle_domain_irq(ipi_domain, ipi);
-		}
-#endif
-
+		if (i == 0)
+			mpic_handle_ipi_irq(mpic);
 	} while (1);
 }
 
-static int armada_370_xp_mpic_suspend(void)
+static int mpic_suspend(void)
 {
-	doorbell_mask_reg = readl(per_cpu_int_base +
-				  ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+	struct mpic *mpic = mpic_data;
+
+	mpic->doorbell_mask = readl(mpic->per_cpu + MPIC_IN_DRBEL_MASK);
+
 	return 0;
 }
 
-static void armada_370_xp_mpic_resume(void)
+static void mpic_resume(void)
 {
+	struct mpic *mpic = mpic_data;
 	bool src0, src1;
-	int nirqs;
-	irq_hw_number_t irq;
 
 	/* Re-enable interrupts */
-	nirqs = (readl(main_int_base + ARMADA_370_XP_INT_CONTROL) >> 2) & 0x3ff;
-	for (irq = 0; irq < nirqs; irq++) {
-		struct irq_data *data;
-		int virq;
+	for (irq_hw_number_t i = 0; i < mpic->domain->hwirq_max; i++) {
+		unsigned int virq = irq_linear_revmap(mpic->domain, i);
+		struct irq_data *d;
 
-		virq = irq_linear_revmap(armada_370_xp_mpic_domain, irq);
-		if (virq == 0)
+		if (!virq)
 			continue;
 
-		data = irq_get_irq_data(virq);
+		d = irq_get_irq_data(virq);
 
-		if (!is_percpu_irq(irq)) {
+		if (!mpic_is_percpu_irq(i)) {
 			/* Non per-CPU interrupts */
-			writel(irq, per_cpu_int_base +
-			       ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
-			if (!irqd_irq_disabled(data))
-				armada_370_xp_irq_unmask(data);
+			writel(i, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
+			if (!irqd_irq_disabled(d))
+				mpic_irq_unmask(d);
 		} else {
 			/* Per-CPU interrupts */
-			writel(irq, main_int_base +
-			       ARMADA_370_XP_INT_SET_ENABLE_OFFS);
+			writel(i, mpic->base + MPIC_INT_SET_ENABLE);
 
 			/*
-			 * Re-enable on the current CPU,
-			 * armada_xp_mpic_reenable_percpu() will take
-			 * care of secondary CPUs when they come up.
+			 * Re-enable on the current CPU, mpic_reenable_percpu()
+			 * will take care of secondary CPUs when they come up.
 			 */
 			if (irq_percpu_is_enabled(virq))
-				armada_370_xp_irq_unmask(data);
+				mpic_irq_unmask(d);
 		}
 	}
 
 	/* Reconfigure doorbells for IPIs and MSIs */
-	writel(doorbell_mask_reg,
-	       per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+	writel(mpic->doorbell_mask, mpic->per_cpu + MPIC_IN_DRBEL_MASK);
 
-	if (is_ipi_available()) {
-		src0 = doorbell_mask_reg & IPI_DOORBELL_MASK;
-		src1 = doorbell_mask_reg & PCI_MSI_DOORBELL_MASK;
+	if (mpic_is_ipi_available(mpic)) {
+		src0 = mpic->doorbell_mask & IPI_DOORBELL_MASK;
+		src1 = mpic->doorbell_mask & PCI_MSI_DOORBELL_MASK;
 	} else {
-		src0 = doorbell_mask_reg & PCI_MSI_FULL_DOORBELL_SRC0_MASK;
-		src1 = doorbell_mask_reg & PCI_MSI_FULL_DOORBELL_SRC1_MASK;
+		src0 = mpic->doorbell_mask & PCI_MSI_FULL_DOORBELL_SRC0_MASK;
+		src1 = mpic->doorbell_mask & PCI_MSI_FULL_DOORBELL_SRC1_MASK;
 	}
 
 	if (src0)
-		writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+		writel(0, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 	if (src1)
-		writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+		writel(1, mpic->per_cpu + MPIC_INT_CLEAR_MASK);
 
-	if (is_ipi_available())
-		ipi_resume();
+	if (mpic_is_ipi_available(mpic))
+		mpic_ipi_resume(mpic);
 }
 
-static struct syscore_ops armada_370_xp_mpic_syscore_ops = {
-	.suspend	= armada_370_xp_mpic_suspend,
-	.resume		= armada_370_xp_mpic_resume,
+static struct syscore_ops mpic_syscore_ops = {
+	.suspend	= mpic_suspend,
+	.resume		= mpic_resume,
 };
 
-static int __init armada_370_xp_mpic_of_init(struct device_node *node,
-					     struct device_node *parent)
+static int __init mpic_map_region(struct device_node *np, int index,
+				  void __iomem **base, phys_addr_t *phys_base)
 {
-	struct resource main_int_res, per_cpu_int_res;
-	int nr_irqs, i;
-	u32 control;
+	struct resource res;
+	int err;
+
+	err = of_address_to_resource(np, index, &res);
+	if (WARN_ON(err))
+		goto fail;
+
+	if (WARN_ON(!request_mem_region(res.start, resource_size(&res), np->full_name))) {
+		err = -EBUSY;
+		goto fail;
+	}
+
+	*base = ioremap(res.start, resource_size(&res));
+	if (WARN_ON(!*base)) {
+		err = -ENOMEM;
+		goto fail;
+	}
 
-	BUG_ON(of_address_to_resource(node, 0, &main_int_res));
-	BUG_ON(of_address_to_resource(node, 1, &per_cpu_int_res));
+	if (phys_base)
+		*phys_base = res.start;
 
-	BUG_ON(!request_mem_region(main_int_res.start,
-				   resource_size(&main_int_res),
-				   node->full_name));
-	BUG_ON(!request_mem_region(per_cpu_int_res.start,
-				   resource_size(&per_cpu_int_res),
-				   node->full_name));
+	return 0;
+
+fail:
+	pr_err("%pOF: Unable to map resource %d: %pE\n", np, index, ERR_PTR(err));
+	return err;
+}
 
-	main_int_base = ioremap(main_int_res.start,
-				resource_size(&main_int_res));
-	BUG_ON(!main_int_base);
+static int __init mpic_of_init(struct device_node *node, struct device_node *parent)
+{
+	phys_addr_t phys_base;
+	unsigned int nr_irqs;
+	struct mpic *mpic;
+	int err;
+
+	mpic = kzalloc(sizeof(*mpic), GFP_KERNEL);
+	if (WARN_ON(!mpic))
+		return -ENOMEM;
 
-	per_cpu_int_base = ioremap(per_cpu_int_res.start,
-				   resource_size(&per_cpu_int_res));
-	BUG_ON(!per_cpu_int_base);
+	mpic_data = mpic;
 
-	control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL);
-	nr_irqs = (control >> 2) & 0x3ff;
+	err = mpic_map_region(node, 0, &mpic->base, &phys_base);
+	if (err)
+		return err;
 
-	for (i = 0; i < nr_irqs; i++)
-		writel(i, main_int_base + ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS);
+	err = mpic_map_region(node, 1, &mpic->per_cpu, NULL);
+	if (err)
+		return err;
 
-	armada_370_xp_mpic_domain =
-		irq_domain_add_linear(node, nr_irqs,
-				&armada_370_xp_mpic_irq_ops, NULL);
-	BUG_ON(!armada_370_xp_mpic_domain);
-	irq_domain_update_bus_token(armada_370_xp_mpic_domain, DOMAIN_BUS_WIRED);
+	nr_irqs = FIELD_GET(MPIC_INT_CONTROL_NUMINT_MASK, readl(mpic->base + MPIC_INT_CONTROL));
+
+	for (irq_hw_number_t i = 0; i < nr_irqs; i++)
+		writel(i, mpic->base + MPIC_INT_CLEAR_ENABLE);
+
+	/*
+	 * Initialize mpic->parent_irq before calling any other functions, since
+	 * it is used to distinguish between IPI and non-IPI platforms.
+	 */
+	mpic->parent_irq = irq_of_parse_and_map(node, 0);
 
 	/*
-	 * Initialize parent_irq before calling any other functions, since it is
-	 * used to distinguish between IPI and non-IPI platforms.
+	 * On non-IPI platforms the driver currently supports only the per-CPU
+	 * interrupts (the first 29 interrupts). See mpic_handle_cascade_irq().
 	 */
-	parent_irq = irq_of_parse_and_map(node, 0);
+	if (!mpic_is_ipi_available(mpic))
+		nr_irqs = MPIC_PER_CPU_IRQS_NR;
+
+	mpic->domain = irq_domain_add_linear(node, nr_irqs, &mpic_irq_ops, mpic);
+	if (!mpic->domain) {
+		pr_err("%pOF: Unable to add IRQ domain\n", node);
+		return -ENOMEM;
+	}
+
+	irq_domain_update_bus_token(mpic->domain, DOMAIN_BUS_WIRED);
 
 	/* Setup for the boot CPU */
-	armada_xp_mpic_perf_init();
-	armada_xp_mpic_smp_cpu_init();
+	mpic_perf_init(mpic);
+	mpic_smp_cpu_init(mpic);
 
-	armada_370_xp_msi_init(node, main_int_res.start);
+	err = mpic_msi_init(mpic, node, phys_base);
+	if (err) {
+		pr_err("%pOF: Unable to initialize MSI domain\n", node);
+		return err;
+	}
 
-	if (parent_irq <= 0) {
-		irq_set_default_host(armada_370_xp_mpic_domain);
-		set_handle_irq(armada_370_xp_handle_irq);
+	if (mpic_is_ipi_available(mpic)) {
+		irq_set_default_host(mpic->domain);
+		set_handle_irq(mpic_handle_irq);
 #ifdef CONFIG_SMP
-		armada_xp_ipi_init(node);
+		err = mpic_ipi_init(mpic, node);
+		if (err) {
+			pr_err("%pOF: Unable to initialize IPI domain\n", node);
+			return err;
+		}
+
 		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_ARMADA_XP_STARTING,
 					  "irqchip/armada/ipi:starting",
-					  armada_xp_mpic_starting_cpu, NULL);
+					  mpic_starting_cpu, NULL);
 #endif
 	} else {
 #ifdef CONFIG_SMP
@@ -882,13 +899,13 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
 					  "irqchip/armada/cascade:starting",
 					  mpic_cascaded_starting_cpu, NULL);
 #endif
-		irq_set_chained_handler(parent_irq,
-					armada_370_xp_mpic_handle_cascade_irq);
+		irq_set_chained_handler_and_data(mpic->parent_irq,
+						 mpic_handle_cascade_irq, mpic);
 	}
 
-	register_syscore_ops(&armada_370_xp_mpic_syscore_ops);
+	register_syscore_ops(&mpic_syscore_ops);
 
 	return 0;
 }
 
-IRQCHIP_DECLARE(armada_370_xp_mpic, "marvell,mpic", armada_370_xp_mpic_of_init);
+IRQCHIP_DECLARE(marvell_mpic, "marvell,mpic", mpic_of_init);
diff --git a/drivers/irqchip/irq-atmel-aic.c b/drivers/irqchip/irq-atmel-aic.c
index 4631f6847953..3839ad79ad31 100644
--- a/drivers/irqchip/irq-atmel-aic.c
+++ b/drivers/irqchip/irq-atmel-aic.c
@@ -57,8 +57,7 @@
 
 static struct irq_domain *aic_domain;
 
-static asmlinkage void __exception_irq_entry
-aic_handle(struct pt_regs *regs)
+static void __exception_irq_entry aic_handle(struct pt_regs *regs)
 {
 	struct irq_domain_chip_generic *dgc = aic_domain->gc;
 	struct irq_chip_generic *gc = dgc->gc[0];
diff --git a/drivers/irqchip/irq-atmel-aic5.c b/drivers/irqchip/irq-atmel-aic5.c
index 145535bd7560..c0f55dc7b050 100644
--- a/drivers/irqchip/irq-atmel-aic5.c
+++ b/drivers/irqchip/irq-atmel-aic5.c
@@ -67,8 +67,7 @@
 
 static struct irq_domain *aic5_domain;
 
-static asmlinkage void __exception_irq_entry
-aic5_handle(struct pt_regs *regs)
+static void __exception_irq_entry aic5_handle(struct pt_regs *regs)
 {
 	struct irq_chip_generic *bgc = irq_get_domain_generic_chip(aic5_domain, 0);
 	u32 irqnr;
diff --git a/drivers/irqchip/irq-clps711x.c b/drivers/irqchip/irq-clps711x.c
index e731e0784f7e..806ebb1de201 100644
--- a/drivers/irqchip/irq-clps711x.c
+++ b/drivers/irqchip/irq-clps711x.c
@@ -69,7 +69,7 @@ static struct {
 	struct irq_domain_ops	ops;
 } *clps711x_intc;
 
-static asmlinkage void __exception_irq_entry clps711x_irqh(struct pt_regs *regs)
+static void __exception_irq_entry clps711x_irqh(struct pt_regs *regs)
 {
 	u32 irqstat;
 
diff --git a/drivers/irqchip/irq-davinci-cp-intc.c b/drivers/irqchip/irq-davinci-cp-intc.c
index 7482c8ed34b2..f4f8e9fadbbf 100644
--- a/drivers/irqchip/irq-davinci-cp-intc.c
+++ b/drivers/irqchip/irq-davinci-cp-intc.c
@@ -116,8 +116,7 @@ static struct irq_chip davinci_cp_intc_irq_chip = {
 	.flags		= IRQCHIP_SKIP_SET_WAKE,
 };
 
-static asmlinkage void __exception_irq_entry
-davinci_cp_intc_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry davinci_cp_intc_handle_irq(struct pt_regs *regs)
 {
 	int gpir, irqnr, none;
 
diff --git a/drivers/irqchip/irq-ftintc010.c b/drivers/irqchip/irq-ftintc010.c
index 359efc1d1be7..b91c358ea6db 100644
--- a/drivers/irqchip/irq-ftintc010.c
+++ b/drivers/irqchip/irq-ftintc010.c
@@ -125,7 +125,7 @@ static struct irq_chip ft010_irq_chip = {
 /* Local static for the IRQ entry call */
 static struct ft010_irq_data firq;
 
-static asmlinkage void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs)
 {
 	struct ft010_irq_data *f = &firq;
 	int irq;
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 74f21e03d4a3..ce87205e3e82 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -930,7 +930,7 @@ static void __gic_handle_irq_from_irqsoff(struct pt_regs *regs)
 	__gic_handle_nmi(irqnr, regs);
 }
 
-static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
 {
 	if (unlikely(gic_supports_nmi() && !interrupts_enabled(regs)))
 		__gic_handle_irq_from_irqsoff(regs);
diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index ca32ac19d284..58c28895f8c4 100644
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -97,7 +97,7 @@ bool gic_cpuif_has_vsgi(void)
 
 	fld = cpuid_feature_extract_unsigned_field(reg, ID_AA64PFR0_EL1_GIC_SHIFT);
 
-	return fld >= 0x3;
+	return fld >= ID_AA64PFR0_EL1_GIC_V4P1;
 }
 #else
 bool gic_cpuif_has_vsgi(void)
diff --git a/drivers/irqchip/irq-ixp4xx.c b/drivers/irqchip/irq-ixp4xx.c
index 5fba907b9052..f23b02f62a5c 100644
--- a/drivers/irqchip/irq-ixp4xx.c
+++ b/drivers/irqchip/irq-ixp4xx.c
@@ -105,8 +105,7 @@ static void ixp4xx_irq_unmask(struct irq_data *d)
 	}
 }
 
-static asmlinkage void __exception_irq_entry
-ixp4xx_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry ixp4xx_handle_irq(struct pt_regs *regs)
 {
 	struct ixp4xx_irq *ixi = &ixirq;
 	unsigned long status;
diff --git a/drivers/irqchip/irq-loongarch-avec.c b/drivers/irqchip/irq-loongarch-avec.c
new file mode 100644
index 000000000000..0f6e465dd309
--- /dev/null
+++ b/drivers/irqchip/irq-loongarch-avec.c
@@ -0,0 +1,425 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2024 Loongson Technologies, Inc.
+ */
+
+#include <linux/cpuhotplug.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/msi.h>
+#include <linux/radix-tree.h>
+#include <linux/spinlock.h>
+
+#include <asm/loongarch.h>
+#include <asm/setup.h>
+
+#include "irq-msi-lib.h"
+#include "irq-loongson.h"
+
+#define VECTORS_PER_REG		64
+#define IRR_VECTOR_MASK		0xffUL
+#define IRR_INVALID_MASK	0x80000000UL
+#define AVEC_MSG_OFFSET		0x100000
+
+#ifdef CONFIG_SMP
+struct pending_list {
+	struct list_head	head;
+};
+
+static struct cpumask intersect_mask;
+static DEFINE_PER_CPU(struct pending_list, pending_list);
+#endif
+
+static DEFINE_PER_CPU(struct irq_desc * [NR_VECTORS], irq_map);
+
+struct avecintc_chip {
+	raw_spinlock_t		lock;
+	struct fwnode_handle	*fwnode;
+	struct irq_domain	*domain;
+	struct irq_matrix	*vector_matrix;
+	phys_addr_t		msi_base_addr;
+};
+
+static struct avecintc_chip loongarch_avec;
+
+struct avecintc_data {
+	struct list_head	entry;
+	unsigned int		cpu;
+	unsigned int		vec;
+	unsigned int		prev_cpu;
+	unsigned int		prev_vec;
+	unsigned int		moving;
+};
+
+static inline void avecintc_ack_irq(struct irq_data *d)
+{
+}
+
+static inline void avecintc_mask_irq(struct irq_data *d)
+{
+}
+
+static inline void avecintc_unmask_irq(struct irq_data *d)
+{
+}
+
+#ifdef CONFIG_SMP
+static inline void pending_list_init(int cpu)
+{
+	struct pending_list *plist = per_cpu_ptr(&pending_list, cpu);
+
+	INIT_LIST_HEAD(&plist->head);
+}
+
+static void avecintc_sync(struct avecintc_data *adata)
+{
+	struct pending_list *plist;
+
+	if (cpu_online(adata->prev_cpu)) {
+		plist = per_cpu_ptr(&pending_list, adata->prev_cpu);
+		list_add_tail(&adata->entry, &plist->head);
+		adata->moving = 1;
+		mp_ops.send_ipi_single(adata->prev_cpu, ACTION_CLEAR_VECTOR);
+	}
+}
+
+static int avecintc_set_affinity(struct irq_data *data, const struct cpumask *dest, bool force)
+{
+	int cpu, ret, vector;
+	struct avecintc_data *adata;
+
+	scoped_guard(raw_spinlock, &loongarch_avec.lock) {
+		adata = irq_data_get_irq_chip_data(data);
+
+		if (adata->moving)
+			return -EBUSY;
+
+		if (cpu_online(adata->cpu) && cpumask_test_cpu(adata->cpu, dest))
+			return 0;
+
+		cpumask_and(&intersect_mask, dest, cpu_online_mask);
+
+		ret = irq_matrix_alloc(loongarch_avec.vector_matrix, &intersect_mask, false, &cpu);
+		if (ret < 0)
+			return ret;
+
+		vector = ret;
+		adata->cpu = cpu;
+		adata->vec = vector;
+		per_cpu_ptr(irq_map, adata->cpu)[adata->vec] = irq_data_to_desc(data);
+		avecintc_sync(adata);
+	}
+
+	irq_data_update_effective_affinity(data, cpumask_of(cpu));
+
+	return IRQ_SET_MASK_OK;
+}
+
+static int avecintc_cpu_online(unsigned int cpu)
+{
+	if (!loongarch_avec.vector_matrix)
+		return 0;
+
+	guard(raw_spinlock)(&loongarch_avec.lock);
+
+	irq_matrix_online(loongarch_avec.vector_matrix);
+
+	pending_list_init(cpu);
+
+	return 0;
+}
+
+static int avecintc_cpu_offline(unsigned int cpu)
+{
+	struct pending_list *plist = per_cpu_ptr(&pending_list, cpu);
+
+	if (!loongarch_avec.vector_matrix)
+		return 0;
+
+	guard(raw_spinlock)(&loongarch_avec.lock);
+
+	if (!list_empty(&plist->head))
+		pr_warn("CPU#%d vector is busy\n", cpu);
+
+	irq_matrix_offline(loongarch_avec.vector_matrix);
+
+	return 0;
+}
+
+void complete_irq_moving(void)
+{
+	struct pending_list *plist = this_cpu_ptr(&pending_list);
+	struct avecintc_data *adata, *tdata;
+	int cpu, vector, bias;
+	uint64_t isr;
+
+	guard(raw_spinlock)(&loongarch_avec.lock);
+
+	list_for_each_entry_safe(adata, tdata, &plist->head, entry) {
+		cpu = adata->prev_cpu;
+		vector = adata->prev_vec;
+		bias = vector / VECTORS_PER_REG;
+		switch (bias) {
+		case 0:
+			isr = csr_read64(LOONGARCH_CSR_ISR0);
+			break;
+		case 1:
+			isr = csr_read64(LOONGARCH_CSR_ISR1);
+			break;
+		case 2:
+			isr = csr_read64(LOONGARCH_CSR_ISR2);
+			break;
+		case 3:
+			isr = csr_read64(LOONGARCH_CSR_ISR3);
+			break;
+		}
+
+		if (isr & (1UL << (vector % VECTORS_PER_REG))) {
+			mp_ops.send_ipi_single(cpu, ACTION_CLEAR_VECTOR);
+			continue;
+		}
+		list_del(&adata->entry);
+		irq_matrix_free(loongarch_avec.vector_matrix, cpu, vector, false);
+		this_cpu_write(irq_map[vector], NULL);
+		adata->moving = 0;
+		adata->prev_cpu = adata->cpu;
+		adata->prev_vec = adata->vec;
+	}
+}
+#endif
+
+static void avecintc_compose_msi_msg(struct irq_data *d, struct msi_msg *msg)
+{
+	struct avecintc_data *adata = irq_data_get_irq_chip_data(d);
+
+	msg->address_hi = 0x0;
+	msg->address_lo = (loongarch_avec.msi_base_addr | (adata->vec & 0xff) << 4)
+			  | ((cpu_logical_map(adata->cpu & 0xffff)) << 12);
+	msg->data = 0x0;
+}
+
+static struct irq_chip avec_irq_controller = {
+	.name			= "AVECINTC",
+	.irq_ack		= avecintc_ack_irq,
+	.irq_mask		= avecintc_mask_irq,
+	.irq_unmask		= avecintc_unmask_irq,
+#ifdef CONFIG_SMP
+	.irq_set_affinity	= avecintc_set_affinity,
+#endif
+	.irq_compose_msi_msg	= avecintc_compose_msi_msg,
+};
+
+static void avecintc_irq_dispatch(struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct irq_desc *d;
+
+	chained_irq_enter(chip, desc);
+
+	while (true) {
+		unsigned long vector = csr_read64(LOONGARCH_CSR_IRR);
+		if (vector & IRR_INVALID_MASK)
+			break;
+
+		vector &= IRR_VECTOR_MASK;
+
+		d = this_cpu_read(irq_map[vector]);
+		if (d) {
+			generic_handle_irq_desc(d);
+		} else {
+			spurious_interrupt();
+			pr_warn("Unexpected IRQ occurs on CPU#%d [vector %ld]\n", smp_processor_id(), vector);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static int avecintc_alloc_vector(struct irq_data *irqd, struct avecintc_data *adata)
+{
+	int cpu, ret;
+
+	guard(raw_spinlock_irqsave)(&loongarch_avec.lock);
+
+	ret = irq_matrix_alloc(loongarch_avec.vector_matrix, cpu_online_mask, false, &cpu);
+	if (ret < 0)
+		return ret;
+
+	adata->prev_cpu = adata->cpu = cpu;
+	adata->prev_vec = adata->vec = ret;
+	per_cpu_ptr(irq_map, adata->cpu)[adata->vec] = irq_data_to_desc(irqd);
+
+	return 0;
+}
+
+static int avecintc_domain_alloc(struct irq_domain *domain, unsigned int virq,
+				 unsigned int nr_irqs, void *arg)
+{
+	for (unsigned int i = 0; i < nr_irqs; i++) {
+		struct irq_data *irqd = irq_domain_get_irq_data(domain, virq + i);
+		struct avecintc_data *adata = kzalloc(sizeof(*adata), GFP_KERNEL);
+		int ret;
+
+		if (!adata)
+			return -ENOMEM;
+
+		ret = avecintc_alloc_vector(irqd, adata);
+		if (ret < 0) {
+			kfree(adata);
+			return ret;
+		}
+
+		irq_domain_set_info(domain, virq + i, virq + i, &avec_irq_controller,
+				    adata, handle_edge_irq, NULL, NULL);
+		irqd_set_single_target(irqd);
+		irqd_set_affinity_on_activate(irqd);
+	}
+
+	return 0;
+}
+
+static void avecintc_free_vector(struct irq_data *irqd, struct avecintc_data *adata)
+{
+	guard(raw_spinlock_irqsave)(&loongarch_avec.lock);
+
+	per_cpu(irq_map, adata->cpu)[adata->vec] = NULL;
+	irq_matrix_free(loongarch_avec.vector_matrix, adata->cpu, adata->vec, false);
+
+#ifdef CONFIG_SMP
+	if (!adata->moving)
+		return;
+
+	per_cpu(irq_map, adata->prev_cpu)[adata->prev_vec] = NULL;
+	irq_matrix_free(loongarch_avec.vector_matrix, adata->prev_cpu, adata->prev_vec, false);
+	list_del_init(&adata->entry);
+#endif
+}
+
+static void avecintc_domain_free(struct irq_domain *domain, unsigned int virq,
+				 unsigned int nr_irqs)
+{
+	for (unsigned int i = 0; i < nr_irqs; i++) {
+		struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
+
+		if (d) {
+			struct avecintc_data *adata = irq_data_get_irq_chip_data(d);
+
+			avecintc_free_vector(d, adata);
+			irq_domain_reset_irq_data(d);
+			kfree(adata);
+		}
+	}
+}
+
+static const struct irq_domain_ops avecintc_domain_ops = {
+	.alloc		= avecintc_domain_alloc,
+	.free		= avecintc_domain_free,
+	.select		= msi_lib_irq_domain_select,
+};
+
+static int __init irq_matrix_init(void)
+{
+	loongarch_avec.vector_matrix = irq_alloc_matrix(NR_VECTORS, 0, NR_VECTORS);
+	if (!loongarch_avec.vector_matrix)
+		return -ENOMEM;
+
+	for (int i = 0; i < NR_LEGACY_VECTORS; i++)
+		irq_matrix_assign_system(loongarch_avec.vector_matrix, i, false);
+
+	irq_matrix_online(loongarch_avec.vector_matrix);
+
+	return 0;
+}
+
+static int __init avecintc_init(struct irq_domain *parent)
+{
+	int ret, parent_irq;
+	unsigned long value;
+
+	raw_spin_lock_init(&loongarch_avec.lock);
+
+	loongarch_avec.fwnode = irq_domain_alloc_named_fwnode("AVECINTC");
+	if (!loongarch_avec.fwnode) {
+		pr_err("Unable to allocate domain handle\n");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	loongarch_avec.domain = irq_domain_create_tree(loongarch_avec.fwnode,
+						       &avecintc_domain_ops, NULL);
+	if (!loongarch_avec.domain) {
+		pr_err("Unable to create IRQ domain\n");
+		ret = -ENOMEM;
+		goto out_free_handle;
+	}
+
+	parent_irq = irq_create_mapping(parent, INT_AVEC);
+	if (!parent_irq) {
+		pr_err("Failed to mapping hwirq\n");
+		ret = -EINVAL;
+		goto out_remove_domain;
+	}
+
+	ret = irq_matrix_init();
+	if (ret < 0) {
+		pr_err("Failed to init irq matrix\n");
+		goto out_remove_domain;
+	}
+	irq_set_chained_handler_and_data(parent_irq, avecintc_irq_dispatch, NULL);
+
+#ifdef CONFIG_SMP
+	pending_list_init(0);
+	cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_AVECINTC_STARTING,
+				  "irqchip/loongarch/avecintc:starting",
+				  avecintc_cpu_online, avecintc_cpu_offline);
+#endif
+	value = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC);
+	value |= IOCSR_MISC_FUNC_AVEC_EN;
+	iocsr_write64(value, LOONGARCH_IOCSR_MISC_FUNC);
+
+	return ret;
+
+out_remove_domain:
+	irq_domain_remove(loongarch_avec.domain);
+out_free_handle:
+	irq_domain_free_fwnode(loongarch_avec.fwnode);
+out:
+	return ret;
+}
+
+static int __init pch_msi_parse_madt(union acpi_subtable_headers *header,
+				     const unsigned long end)
+{
+	struct acpi_madt_msi_pic *pchmsi_entry = (struct acpi_madt_msi_pic *)header;
+
+	loongarch_avec.msi_base_addr = pchmsi_entry->msg_address - AVEC_MSG_OFFSET;
+
+	return pch_msi_acpi_init_avec(loongarch_avec.domain);
+}
+
+static inline int __init acpi_cascade_irqdomain_init(void)
+{
+	return acpi_table_parse_madt(ACPI_MADT_TYPE_MSI_PIC, pch_msi_parse_madt, 1);
+}
+
+int __init avecintc_acpi_init(struct irq_domain *parent)
+{
+	int ret = avecintc_init(parent);
+	if (ret < 0) {
+		pr_err("Failed to init IRQ domain\n");
+		return ret;
+	}
+
+	ret = acpi_cascade_irqdomain_init();
+	if (ret < 0) {
+		pr_err("Failed to init cascade IRQ domain\n");
+		return ret;
+	}
+
+	return ret;
+}
diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c
index b35903a06902..e62dab4c97fc 100644
--- a/drivers/irqchip/irq-loongarch-cpu.c
+++ b/drivers/irqchip/irq-loongarch-cpu.c
@@ -13,6 +13,8 @@
 #include <asm/loongarch.h>
 #include <asm/setup.h>
 
+#include "irq-loongson.h"
+
 static struct irq_domain *irq_domain;
 struct fwnode_handle *cpuintc_handle;
 
@@ -140,7 +142,10 @@ static int __init acpi_cascade_irqdomain_init(void)
 	if (r < 0)
 		return r;
 
-	return 0;
+	if (cpu_has_avecint)
+		r = avecintc_acpi_init(irq_domain);
+
+	return r;
 }
 
 static int __init cpuintc_acpi_init(union acpi_subtable_headers *header,
diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index b1f2080be2be..e24db71a8783 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -17,6 +17,8 @@
 #include <linux/syscore_ops.h>
 #include <asm/numa.h>
 
+#include "irq-loongson.h"
+
 #define EIOINTC_REG_NODEMAP	0x14a0
 #define EIOINTC_REG_IPMAP	0x14c0
 #define EIOINTC_REG_ENABLE	0x1600
@@ -360,6 +362,9 @@ static int __init acpi_cascade_irqdomain_init(void)
 	if (r < 0)
 		return r;
 
+	if (cpu_has_avecint)
+		return 0;
+
 	r = acpi_table_parse_madt(ACPI_MADT_TYPE_MSI_PIC, pch_msi_parse_madt, 1);
 	if (r < 0)
 		return r;
@@ -396,8 +401,8 @@ static int __init eiointc_init(struct eiointc_priv *priv, int parent_irq,
 
 	if (nr_pics == 1) {
 		register_syscore_ops(&eiointc_syscore_ops);
-		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_LOONGARCH_STARTING,
-					  "irqchip/loongarch/intc:starting",
+		cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_EIOINTC_STARTING,
+					  "irqchip/loongarch/eiointc:starting",
 					  eiointc_router_init, NULL);
 	}
 
diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c
index 0bff728b25e3..5da02c7ad0b3 100644
--- a/drivers/irqchip/irq-loongson-htvec.c
+++ b/drivers/irqchip/irq-loongson-htvec.c
@@ -17,6 +17,8 @@
 #include <linux/of_irq.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define HTVEC_EN_OFF		0x20
 #define HTVEC_MAX_PARENT_IRQ	8
diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
index 7c4fe7ab4b83..2b1bd4a96665 100644
--- a/drivers/irqchip/irq-loongson-liointc.c
+++ b/drivers/irqchip/irq-loongson-liointc.c
@@ -22,6 +22,8 @@
 #include <asm/loongson.h>
 #endif
 
+#include "irq-loongson.h"
+
 #define LIOINTC_CHIP_IRQ	32
 #define LIOINTC_NUM_PARENT	4
 #define LIOINTC_NUM_CORES	4
diff --git a/drivers/irqchip/irq-loongson-pch-lpc.c b/drivers/irqchip/irq-loongson-pch-lpc.c
index 9b35492fb6be..2d4c3ec128b8 100644
--- a/drivers/irqchip/irq-loongson-pch-lpc.c
+++ b/drivers/irqchip/irq-loongson-pch-lpc.c
@@ -15,6 +15,8 @@
 #include <linux/kernel.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define LPC_INT_CTL		0x00
 #define LPC_INT_ENA		0x04
diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c
index dd4d699170f4..bd337ecddb40 100644
--- a/drivers/irqchip/irq-loongson-pch-msi.c
+++ b/drivers/irqchip/irq-loongson-pch-msi.c
@@ -15,6 +15,9 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 
+#include "irq-msi-lib.h"
+#include "irq-loongson.h"
+
 static int nr_pics;
 
 struct pch_msi_data {
@@ -27,26 +30,6 @@ struct pch_msi_data {
 
 static struct fwnode_handle *pch_msi_handle[MAX_IO_PICS];
 
-static void pch_msi_mask_msi_irq(struct irq_data *d)
-{
-	pci_msi_mask_irq(d);
-	irq_chip_mask_parent(d);
-}
-
-static void pch_msi_unmask_msi_irq(struct irq_data *d)
-{
-	irq_chip_unmask_parent(d);
-	pci_msi_unmask_irq(d);
-}
-
-static struct irq_chip pch_msi_irq_chip = {
-	.name			= "PCH PCI MSI",
-	.irq_mask		= pch_msi_mask_msi_irq,
-	.irq_unmask		= pch_msi_unmask_msi_irq,
-	.irq_ack		= irq_chip_ack_parent,
-	.irq_set_affinity	= irq_chip_set_affinity_parent,
-};
-
 static int pch_msi_allocate_hwirq(struct pch_msi_data *priv, int num_req)
 {
 	int first;
@@ -85,12 +68,6 @@ static void pch_msi_compose_msi_msg(struct irq_data *data,
 	msg->data = data->hwirq;
 }
 
-static struct msi_domain_info pch_msi_domain_info = {
-	.flags	= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		  MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
-	.chip	= &pch_msi_irq_chip,
-};
-
 static struct irq_chip middle_irq_chip = {
 	.name			= "PCH MSI",
 	.irq_mask		= irq_chip_mask_parent,
@@ -155,13 +132,31 @@ static void pch_msi_middle_domain_free(struct irq_domain *domain,
 static const struct irq_domain_ops pch_msi_middle_domain_ops = {
 	.alloc	= pch_msi_middle_domain_alloc,
 	.free	= pch_msi_middle_domain_free,
+	.select	= msi_lib_irq_domain_select,
+};
+
+#define PCH_MSI_FLAGS_REQUIRED  (MSI_FLAG_USE_DEF_DOM_OPS |	\
+				 MSI_FLAG_USE_DEF_CHIP_OPS |	\
+				 MSI_FLAG_PCI_MSI_MASK_PARENT)
+
+#define PCH_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK |	\
+				 MSI_FLAG_PCI_MSIX      |	\
+				 MSI_FLAG_MULTI_PCI_MSI)
+
+static struct msi_parent_ops pch_msi_parent_ops = {
+	.required_flags		= PCH_MSI_FLAGS_REQUIRED,
+	.supported_flags	= PCH_MSI_FLAGS_SUPPORTED,
+	.bus_select_mask	= MATCH_PCI_MSI,
+	.bus_select_token	= DOMAIN_BUS_NEXUS,
+	.prefix			= "PCH-",
+	.init_dev_msi_info	= msi_lib_init_dev_msi_info,
 };
 
 static int pch_msi_init_domains(struct pch_msi_data *priv,
 				struct irq_domain *parent,
 				struct fwnode_handle *domain_handle)
 {
-	struct irq_domain *middle_domain, *msi_domain;
+	struct irq_domain *middle_domain;
 
 	middle_domain = irq_domain_create_hierarchy(parent, 0, priv->num_irqs,
 						    domain_handle,
@@ -174,14 +169,8 @@ static int pch_msi_init_domains(struct pch_msi_data *priv,
 
 	irq_domain_update_bus_token(middle_domain, DOMAIN_BUS_NEXUS);
 
-	msi_domain = pci_msi_create_irq_domain(domain_handle,
-					       &pch_msi_domain_info,
-					       middle_domain);
-	if (!msi_domain) {
-		pr_err("Failed to create PCI MSI domain\n");
-		irq_domain_remove(middle_domain);
-		return -ENOMEM;
-	}
+	middle_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
+	middle_domain->msi_parent_ops = &pch_msi_parent_ops;
 
 	return 0;
 }
@@ -266,17 +255,17 @@ IRQCHIP_DECLARE(pch_msi, "loongson,pch-msi-1.0", pch_msi_of_init);
 #ifdef CONFIG_ACPI
 struct fwnode_handle *get_pch_msi_handle(int pci_segment)
 {
-	int i;
+	if (cpu_has_avecint)
+		return pch_msi_handle[0];
 
-	for (i = 0; i < MAX_IO_PICS; i++) {
+	for (int i = 0; i < MAX_IO_PICS; i++) {
 		if (msi_group[i].pci_segment == pci_segment)
 			return pch_msi_handle[i];
 	}
-	return NULL;
+	return pch_msi_handle[0];
 }
 
-int __init pch_msi_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_msi_pic *acpi_pchmsi)
+int __init pch_msi_acpi_init(struct irq_domain *parent, struct acpi_madt_msi_pic *acpi_pchmsi)
 {
 	int ret;
 	struct fwnode_handle *domain_handle;
@@ -289,4 +278,18 @@ int __init pch_msi_acpi_init(struct irq_domain *parent,
 
 	return ret;
 }
+
+int __init pch_msi_acpi_init_avec(struct irq_domain *parent)
+{
+	if (pch_msi_handle[0])
+		return 0;
+
+	pch_msi_handle[0] = parent->fwnode;
+	irq_domain_update_bus_token(parent, DOMAIN_BUS_NEXUS);
+
+	parent->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
+	parent->msi_parent_ops = &pch_msi_parent_ops;
+
+	return 0;
+}
 #endif
diff --git a/drivers/irqchip/irq-loongson-pch-pic.c b/drivers/irqchip/irq-loongson-pch-pic.c
index cbaef65e804c..69efda35a8e7 100644
--- a/drivers/irqchip/irq-loongson-pch-pic.c
+++ b/drivers/irqchip/irq-loongson-pch-pic.c
@@ -17,6 +17,8 @@
 #include <linux/of_irq.h>
 #include <linux/syscore_ops.h>
 
+#include "irq-loongson.h"
+
 /* Registers */
 #define PCH_PIC_MASK		0x20
 #define PCH_PIC_HTMSI_EN	0x40
diff --git a/drivers/irqchip/irq-loongson.h b/drivers/irqchip/irq-loongson.h
new file mode 100644
index 000000000000..11fa138d1f44
--- /dev/null
+++ b/drivers/irqchip/irq-loongson.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Loongson Technology Corporation Limited
+ */
+
+#ifndef _DRIVERS_IRQCHIP_IRQ_LOONGSON_H
+#define _DRIVERS_IRQCHIP_IRQ_LOONGSON_H
+
+int find_pch_pic(u32 gsi);
+
+int liointc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_lio_pic *acpi_liointc);
+int eiointc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_eio_pic *acpi_eiointc);
+int avecintc_acpi_init(struct irq_domain *parent);
+
+int htvec_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_ht_pic *acpi_htvec);
+int pch_lpc_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_lpc_pic *acpi_pchlpc);
+int pch_pic_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_bio_pic *acpi_pchpic);
+int pch_msi_acpi_init(struct irq_domain *parent,
+					struct acpi_madt_msi_pic *acpi_pchmsi);
+int pch_msi_acpi_init_avec(struct irq_domain *parent);
+
+#endif /* _DRIVERS_IRQCHIP_IRQ_LOONGSON_H */
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
index 53cc08387588..6f69f4e5dbac 100644
--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -234,37 +234,27 @@ static int mbigen_of_create_domain(struct platform_device *pdev,
 				   struct mbigen_device *mgn_chip)
 {
 	struct platform_device *child;
-	struct device_node *np;
 	u32 num_pins;
-	int ret = 0;
 
-	for_each_child_of_node(pdev->dev.of_node, np) {
+	for_each_child_of_node_scoped(pdev->dev.of_node, np) {
 		if (!of_property_read_bool(np, "interrupt-controller"))
 			continue;
 
 		child = of_platform_device_create(np, NULL, NULL);
-		if (!child) {
-			ret = -ENOMEM;
-			break;
-		}
+		if (!child)
+			return -ENOMEM;
 
 		if (of_property_read_u32(child->dev.of_node, "num-pins",
 					 &num_pins) < 0) {
 			dev_err(&pdev->dev, "No num-pins property\n");
-			ret = -EINVAL;
-			break;
+			return -EINVAL;
 		}
 
-		if (!mbigen_create_device_domain(&child->dev, num_pins, mgn_chip)) {
-			ret = -ENOMEM;
-			break;
-		}
+		if (!mbigen_create_device_domain(&child->dev, num_pins, mgn_chip))
+			return -ENOMEM;
 	}
 
-	if (ret)
-		of_node_put(np);
-
-	return ret;
+	return 0;
 }
 
 #ifdef CONFIG_ACPI
diff --git a/drivers/irqchip/irq-omap-intc.c b/drivers/irqchip/irq-omap-intc.c
index dc82162ba763..ad84a2f03368 100644
--- a/drivers/irqchip/irq-omap-intc.c
+++ b/drivers/irqchip/irq-omap-intc.c
@@ -325,8 +325,7 @@ static int __init omap_init_irq(u32 base, struct device_node *node)
 	return ret;
 }
 
-static asmlinkage void __exception_irq_entry
-omap_intc_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry omap_intc_handle_irq(struct pt_regs *regs)
 {
 	extern unsigned long irq_err_count;
 	u32 irqnr;
diff --git a/drivers/irqchip/irq-sa11x0.c b/drivers/irqchip/irq-sa11x0.c
index 31c202a1ae62..9d0b80271949 100644
--- a/drivers/irqchip/irq-sa11x0.c
+++ b/drivers/irqchip/irq-sa11x0.c
@@ -127,8 +127,7 @@ static int __init sa1100irq_init_devicefs(void)
 
 device_initcall(sa1100irq_init_devicefs);
 
-static asmlinkage void __exception_irq_entry
-sa1100_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry sa1100_handle_irq(struct pt_regs *regs)
 {
 	uint32_t icip, icmr, mask;
 
diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c
index 5018a06060e6..ca471c6fee99 100644
--- a/drivers/irqchip/irq-versatile-fpga.c
+++ b/drivers/irqchip/irq-versatile-fpga.c
@@ -128,7 +128,7 @@ static int handle_one_fpga(struct fpga_irq_data *f, struct pt_regs *regs)
  * Keep iterating over all registered FPGA IRQ controllers until there are
  * no pending interrupts.
  */
-static asmlinkage void __exception_irq_entry fpga_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry fpga_handle_irq(struct pt_regs *regs)
 {
 	int i, handled;