[PATCH 01/23] irqchip: Add Reduced Virtual Interrupt Controller driver

[Marc Zyngier <maz@kernel.org>]

The ARM rVIC is the simplest PV interrupt controller on this side
of the universe. I mean it!

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/irqchip/Kconfig          |   6 +
 drivers/irqchip/Makefile         |   1 +
 drivers/irqchip/irq-rvic.c       | 554 +++++++++++++++++++++++++++++++
 include/linux/cpuhotplug.h       |   1 +
 include/linux/irqchip/irq-rvic.h |  77 +++++
 5 files changed, 639 insertions(+)
 create mode 100644 drivers/irqchip/irq-rvic.c
 create mode 100644 include/linux/irqchip/irq-rvic.h

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index bfc9719dbcdc..348ff1d06651 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -61,6 +61,12 @@ config ARM_NVIC
 	select IRQ_DOMAIN_HIERARCHY
 	select GENERIC_IRQ_CHIP
 
+config ARM_RVIC
+	bool
+	default ARM64
+	select IRQ_DOMAIN_HIERARCHY
+	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
+
 config ARM_VIC
 	bool
 	select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 133f9c45744a..d2b280efd2e0 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_ARM_GIC_V3_ITS_FSL_MC)	+= irq-gic-v3-its-fsl-mc-msi.o
 obj-$(CONFIG_PARTITION_PERCPU)		+= irq-partition-percpu.o
 obj-$(CONFIG_HISILICON_IRQ_MBIGEN)	+= irq-mbigen.o
 obj-$(CONFIG_ARM_NVIC)			+= irq-nvic.o
+obj-$(CONFIG_ARM_RVIC)			+= irq-rvic.o
 obj-$(CONFIG_ARM_VIC)			+= irq-vic.o
 obj-$(CONFIG_ARMADA_370_XP_IRQ)		+= irq-armada-370-xp.o
 obj-$(CONFIG_ATMEL_AIC_IRQ)		+= irq-atmel-aic-common.o irq-atmel-aic.o
diff --git a/drivers/irqchip/irq-rvic.c b/drivers/irqchip/irq-rvic.c
new file mode 100644
index 000000000000..6f37aa4318b6
--- /dev/null
+++ b/drivers/irqchip/irq-rvic.c
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * A Reduced Virtual Interrupt Controler driver
+ *
+ * Initial draft from Alex Shirshikov <alexander.shirshikov@arm.com>
+ *
+ * Copyright 2020 Google LLC.
+ * Author: Marc Zyngier <maz@kernel.org>
+ */
+
+
+#define pr_fmt(fmt)	"rVIC: " fmt
+
+#include <linux/arm-smccc.h>
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+
+#include <linux/irqchip/irq-rvic.h>
+
+#include <asm/exception.h>
+
+#define RVIC_WARN_INTID_TARGET(r, s, intid, mpid)			\
+	WARN((r), "Error " s " INTID%ld target %llx (%ld, %ld)\n", \
+	     (intid), (mpid),						\
+	     RVIC_STATUS_REASON((r)), RVIC_STATUS_INDEX((r)));
+
+#define RVIC_WARN_INTID(r, s, intid)					\
+	WARN((r), "Error " s " INTID%ld (%ld, %ld)\n",	\
+	     (intid),							\
+	     RVIC_STATUS_REASON((r)), RVIC_STATUS_INDEX((r)));
+
+static DEFINE_PER_CPU(unsigned long *, trusted_masked);
+
+struct rvic_data {
+	struct fwnode_handle	*fwnode;
+	struct irq_domain	*domain;
+	unsigned int		nr_trusted;
+	unsigned int		nr_untrusted;
+};
+
+static struct rvic_data rvic;
+
+static inline int rvic_version(unsigned long *version)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_VERSION, &res);
+	if (res.a0 == RVIC_STATUS_SUCCESS)
+		*version = res.a1;
+	return res.a0;
+}
+
+static inline unsigned long rvic_info(unsigned long key,
+				      unsigned long *value)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_INFO, key, &res);
+	if (res.a0 == RVIC_STATUS_SUCCESS)
+		*value = res.a1;
+	return res.a0;
+}
+
+static inline unsigned long rvic_enable(void)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_ENABLE, &res);
+	return res.a0;
+}
+
+static inline unsigned long rvic_disable(void)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_DISABLE, &res);
+	return res.a0;
+}
+
+static inline unsigned long rvic_set_masked(unsigned long target,
+					    unsigned long intid)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_SET_MASKED, target, intid, &res);
+	return res.a0;
+}
+
+static inline unsigned long rvic_clear_masked(unsigned long target,
+					      unsigned long intid)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_CLEAR_MASKED, target, intid, &res);
+	return res.a0;
+}
+
+static inline unsigned long rvic_is_pending(unsigned long target,
+					    unsigned long intid,
+					    bool *is_pending)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_IS_PENDING, target, intid, &res);
+	if (res.a0 == RVIC_STATUS_SUCCESS)
+		*is_pending = res.a1;
+	return res.a0;
+}
+
+static inline unsigned long rvic_signal(unsigned long target,
+					unsigned long intid)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_SIGNAL, target, intid, &res);
+	return res.a0;
+}
+
+static inline unsigned long rvic_clear_pending(unsigned long target,
+					       unsigned long intid)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_CLEAR_PENDING, target, intid, &res);
+	return res.a0;
+}
+
+static inline unsigned long rvic_acknowledge(unsigned long *intid)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_ACKNOWLEDGE, &res);
+	if (res.a0 == RVIC_STATUS_SUCCESS)
+		*intid = res.a1;
+	return res.a0;
+}
+
+static inline unsigned long rvic_resample(unsigned long intid)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC64_RVIC_RESAMPLE, intid, &res);
+	return res.a0;
+}
+
+static u64 rvic_irq_to_mpidr(struct irq_data *data, int *cpup)
+{
+	int cpu;
+
+	if (data->hwirq < rvic.nr_trusted) {
+		*cpup = smp_processor_id();
+		return read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
+	}
+
+	cpu = cpumask_first(data->common->effective_affinity);
+	*cpup = cpu;
+	return cpu_logical_map(cpu) & MPIDR_HWID_BITMASK;
+}
+
+static void rvic_irq_mask(struct irq_data *data)
+{
+	unsigned long ret;
+	u64 mpidr;
+	int cpu;
+
+	mpidr = rvic_irq_to_mpidr(data, &cpu);
+	pr_debug("%llu irq %d hwirq %ld masked\n",
+		 mpidr, data->irq, data->hwirq);
+	ret = rvic_set_masked(mpidr, data->hwirq);
+	RVIC_WARN_INTID_TARGET(ret, "masking", data->hwirq, mpidr);
+
+	if (data->hwirq < rvic.nr_trusted)
+		set_bit(data->hwirq, per_cpu(trusted_masked, cpu));
+}
+
+static void rvic_irq_unmask(struct irq_data *data)
+{
+	unsigned long ret;
+	u64 mpidr;
+	int cpu;
+
+	mpidr = rvic_irq_to_mpidr(data, &cpu);
+	pr_debug("%llu irq %d hwirq %ld unmasked\n",
+		 mpidr, data->irq, data->hwirq);
+	ret = rvic_clear_masked(mpidr, data->hwirq);
+	RVIC_WARN_INTID_TARGET(ret, "unmasking", data->hwirq, mpidr);
+
+	if (data->hwirq < rvic.nr_trusted)
+		clear_bit(data->hwirq, per_cpu(trusted_masked, cpu));
+}
+
+static void rvic_irq_eoi(struct irq_data *data)
+{
+	bool masked;
+
+	/* Resampling is only available on trusted interrupts for now */
+	if (data->hwirq < rvic.nr_trusted &&
+	    (irqd_get_trigger_type(data) & IRQ_TYPE_LEVEL_MASK)) {
+		unsigned long ret;
+
+		ret = rvic_resample(data->hwirq);
+		RVIC_WARN_INTID(ret, "resampling", data->hwirq);
+	}
+
+	/* irqd_irq_masked doesn't work on percpu-devid interrupts. */
+	if (data->hwirq < rvic.nr_trusted)
+		masked = test_bit(data->hwirq, *this_cpu_ptr(&trusted_masked));
+	else
+		masked = irqd_irq_masked(data);
+
+	if (!masked)
+		rvic_irq_unmask(data);
+}
+
+static void rvic_ipi_send_mask(struct irq_data *data,
+			       const struct cpumask *mask)
+{
+	int cpu;
+
+	for_each_cpu(cpu, mask) {
+		u64 mpidr = cpu_logical_map(cpu) & MPIDR_HWID_BITMASK;
+		unsigned long ret;
+
+		ret = rvic_signal(mpidr, data->hwirq);
+		RVIC_WARN_INTID_TARGET(ret, "signaling", data->hwirq, mpidr);
+	}
+}
+
+static int rvic_irq_get_irqchip_state(struct irq_data *data,
+				      enum irqchip_irq_state which, bool *val)
+{
+	unsigned long ret;
+	u64 mpidr;
+	int cpu;
+
+	mpidr = rvic_irq_to_mpidr(data, &cpu);
+
+	switch (which) {
+	case IRQCHIP_STATE_PENDING:
+		ret = rvic_is_pending(mpidr, data->hwirq, val);
+		RVIC_WARN_INTID_TARGET(ret, "getting pending state",
+				       data->hwirq, mpidr);
+		return ret ? -EINVAL : 0;
+
+	default:
+		return -EINVAL;
+	};
+}
+
+static int rvic_irq_set_irqchip_state(struct irq_data *data,
+				      enum irqchip_irq_state which, bool val)
+{
+	unsigned long ret;
+	u64 mpidr;
+	int cpu;
+
+	mpidr = rvic_irq_to_mpidr(data, &cpu);
+
+	switch (which) {
+	case IRQCHIP_STATE_PENDING:
+		if (val)
+			ret = rvic_signal(mpidr, data->hwirq);
+		else
+			ret = rvic_clear_pending(mpidr, data->hwirq);
+		RVIC_WARN_INTID_TARGET(ret, "setting pending state",
+				       data->hwirq, mpidr);
+		return ret ? -EINVAL : 0;
+
+	case IRQCHIP_STATE_MASKED:
+		if (val)
+			ret = rvic_set_masked(mpidr, data->hwirq);
+		else
+			ret = rvic_clear_masked(mpidr, data->hwirq);
+		RVIC_WARN_INTID_TARGET(ret, "setting masked state",
+				       data->hwirq, mpidr);
+		return ret ? -EINVAL : 0;
+
+	default:
+		return -EINVAL;
+	}
+
+}
+
+static int rvic_irq_retrigger(struct irq_data *data)
+{
+	return !!rvic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true);
+}
+
+static int rvic_set_type(struct irq_data *data, unsigned int type)
+{
+	/*
+	 * Nothing to do here, we're always edge under the hood. Just
+	 * weed out untrusted interrupts, as they cannot be level yet.
+	 */
+	switch (type) {
+	case IRQ_TYPE_LEVEL_HIGH:
+		if (data->hwirq >= rvic.nr_trusted)
+			return -EINVAL;
+
+		fallthrough;
+	case IRQ_TYPE_EDGE_RISING:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static struct irq_chip rvic_chip = {
+	.name			= "rvic",
+	.irq_mask		= rvic_irq_mask,
+	.irq_unmask		= rvic_irq_unmask,
+	.irq_eoi		= rvic_irq_eoi,
+	.ipi_send_mask		= rvic_ipi_send_mask,
+	.irq_get_irqchip_state	= rvic_irq_get_irqchip_state,
+	.irq_set_irqchip_state	= rvic_irq_set_irqchip_state,
+	.irq_retrigger		= rvic_irq_retrigger,
+	.irq_set_type		= rvic_set_type,
+};
+
+static asmlinkage void __exception_irq_entry rvic_handle_irq(struct pt_regs *regs)
+{
+	unsigned long ret, intid;
+	int err;
+
+	ret = rvic_acknowledge(&intid);
+	if (unlikely(ret == RVIC_STATUS_NO_INTERRUPTS)) {
+		pr_debug("CPU%d: Spurious interrupt\n", smp_processor_id());
+		return;
+	}
+
+	if ((unlikely(ret))) {
+		WARN(1, "rVIC: Error acknowledging interrupt (%ld, %ld)\n",
+		     RVIC_STATUS_REASON(ret),
+		     RVIC_STATUS_INDEX(ret));
+		return;
+	}
+
+	if (unlikely(intid >= (rvic.nr_trusted + rvic.nr_untrusted))) {
+		WARN(1, "Unexpected intid out of range (%lu)\n", intid);
+		return;
+	}
+
+	pr_debug("CPU%d: IRQ%ld\n", smp_processor_id(), intid);
+	err = handle_domain_irq(rvic.domain, intid, regs);
+	WARN_ONCE(err, "Unexpected interrupt received %d\n", err);
+}
+
+static int rvic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
+				 unsigned int nr_irqs, void *arg)
+{
+	struct irq_fwspec *fwspec = arg;
+	unsigned int type = IRQ_TYPE_NONE;
+	irq_hw_number_t hwirq;
+	int i, ret;
+
+	ret = irq_domain_translate_twocell(domain, fwspec, &hwirq, &type);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < nr_irqs; i++) {
+		unsigned int intid = hwirq + i;
+		unsigned int irq = virq + i;
+
+		if (intid < 16) {
+			irq_set_percpu_devid(irq);
+			irq_domain_set_info(domain, irq, intid, &rvic_chip,
+					    domain->host_data,
+					    handle_percpu_devid_fasteoi_ipi,
+					    NULL, NULL);
+		} else if (intid < rvic.nr_trusted) {
+			irq_set_percpu_devid(irq);
+			irq_domain_set_info(domain, irq, intid, &rvic_chip,
+					    domain->host_data,
+					    handle_percpu_devid_irq,
+					    NULL, NULL);
+		} else {
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static void rvic_irq_domain_free(struct irq_domain *domain, unsigned int virq,
+				 unsigned int nr_irqs)
+{
+	int i;
+
+	for (i = 0; i < nr_irqs; i++) {
+		struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
+		irq_set_handler(virq + i, NULL);
+		irq_domain_reset_irq_data(d);
+	}
+}
+
+static const struct irq_domain_ops rvic_irq_domain_ops = {
+	.translate	= irq_domain_translate_twocell,
+	.alloc		= rvic_irq_domain_alloc,
+	.free		= rvic_irq_domain_free,
+};
+
+static int rvic_cpu_starting(unsigned int cpu)
+{
+	u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
+	unsigned long ret;
+	int i;
+
+	rvic_disable();
+
+	for (i = 0; i < (rvic.nr_trusted + rvic.nr_untrusted); i++) {
+		rvic_set_masked(mpidr, i);
+		rvic_clear_pending(mpidr, i);
+	}
+
+	ret = rvic_enable();
+	if (ret != RVIC_STATUS_SUCCESS) {
+		pr_err("rVIC: error enabling instance (%ld, %ld)\n",
+		       RVIC_STATUS_REASON(ret),
+		       RVIC_STATUS_INDEX(ret));
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static int rvic_cpu_dying(unsigned int cpu)
+{
+	unsigned long ret;
+
+	ret = rvic_disable();
+	if (ret != RVIC_STATUS_SUCCESS) {
+		pr_err("rVIC: error disabling instance (%ld, %ld)\n",
+		       RVIC_STATUS_REASON(ret),
+		       RVIC_STATUS_INDEX(ret));
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static void __init rvic_smp_init(struct fwnode_handle *fwnode)
+{
+	struct irq_fwspec ipi_fwspec = {
+		.fwnode		= fwnode,
+		.param_count	= 2,
+		.param[0]	= 0,
+		.param[1]	= IRQ_TYPE_EDGE_RISING,
+	};
+	int base_ipi;
+
+	cpuhp_setup_state(CPUHP_AP_IRQ_RVIC_STARTING, "irqchip/rvic:starting",
+			  rvic_cpu_starting, rvic_cpu_dying);
+
+	base_ipi = __irq_domain_alloc_irqs(rvic.domain, -1, 16,
+					   NUMA_NO_NODE, &ipi_fwspec,
+					   false, NULL);
+	if (WARN_ON(base_ipi < 0))
+		return;
+
+	set_smp_ipi_range(base_ipi, 16);
+}
+
+static int __init rvic_init(struct device_node *node,
+			    struct device_node *parent)
+{
+	unsigned long ret, version, val;
+	int cpu;
+
+	if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_1) {
+		pr_err("SMCCC 1.1 required, abording\n");
+		return -EINVAL;
+	}
+
+	rvic.fwnode = of_node_to_fwnode(node);
+
+	ret = rvic_version(&version);
+	if (ret != RVIC_STATUS_SUCCESS) {
+		pr_err("error retrieving version (%ld, %ld)\n",
+		       RVIC_STATUS_REASON(ret),
+		       RVIC_STATUS_INDEX(ret));
+		return -ENXIO;
+	}
+
+	if (version < RVIC_VERSION(0, 3)) {
+		pr_err("version (%ld, %ld) too old, expected min. (%d, %d)\n",
+		       RVIC_VERSION_MAJOR(version),
+		       RVIC_VERSION_MINOR(version),
+		       0, 3);
+		return -ENXIO;
+	}
+
+	ret = rvic_info(RVIC_INFO_KEY_NR_TRUSTED_INTERRUPTS, &val);
+	if (ret != RVIC_STATUS_SUCCESS) {
+		pr_err("error retrieving nr of trusted interrupts (%ld, %ld)\n",
+		       RVIC_STATUS_REASON(ret),
+		       RVIC_STATUS_INDEX(ret));
+		return -ENXIO;
+	}
+
+	rvic.nr_trusted = val;
+
+	ret = rvic_info(RVIC_INFO_KEY_NR_UNTRUSTED_INTERRUPTS, &val);
+	if (ret != RVIC_STATUS_SUCCESS) {
+		pr_err("error retrieving nr of untrusted interrupts (%ld, %ld)\n",
+		       RVIC_STATUS_REASON(ret),
+		       RVIC_STATUS_INDEX(ret));
+		return -ENXIO;
+	}
+
+	rvic.nr_untrusted = val;
+
+	pr_info("probed %u trusted interrupts, %u untrusted interrupts\n",
+		rvic.nr_trusted, rvic.nr_untrusted);
+
+	rvic.domain = irq_domain_create_linear(rvic.fwnode,
+					       rvic.nr_trusted + rvic.nr_untrusted,
+					       &rvic_irq_domain_ops, &rvic);
+	if (!rvic.domain) {
+		pr_warn("Failed to allocate irq domain\n");
+		return -ENOMEM;
+	}
+
+	for_each_possible_cpu(cpu) {
+		unsigned long *map = bitmap_alloc(rvic.nr_trusted, GFP_KERNEL);
+
+		if (!map) {
+			pr_warn("Failed to allocate trusted bitmap (CPU %d)\n",
+				cpu);
+			goto free_percpu;
+		}
+
+		/* Default to masked */
+		bitmap_fill(map, rvic.nr_trusted);
+		per_cpu(trusted_masked, cpu) = map;
+	}
+
+	rvic_smp_init(rvic.fwnode);
+	set_handle_irq(rvic_handle_irq);
+
+	return 0;
+
+free_percpu:
+	for_each_possible_cpu(cpu)
+		kfree(per_cpu(trusted_masked, cpu));
+
+	irq_domain_remove(rvic.domain);
+
+	return -ENOMEM;
+}
+
+IRQCHIP_DECLARE(rvic, "arm,rvic", rvic_init);
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 3215023d4852..ddaa57157af0 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -101,6 +101,7 @@ enum cpuhp_state {
 	CPUHP_AP_IRQ_HIP04_STARTING,
 	CPUHP_AP_IRQ_ARMADA_XP_STARTING,
 	CPUHP_AP_IRQ_BCM2836_STARTING,
+	CPUHP_AP_IRQ_RVIC_STARTING,
 	CPUHP_AP_IRQ_MIPS_GIC_STARTING,
 	CPUHP_AP_IRQ_RISCV_STARTING,
 	CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
diff --git a/include/linux/irqchip/irq-rvic.h b/include/linux/irqchip/irq-rvic.h
new file mode 100644
index 000000000000..0176ca7d3c30
--- /dev/null
+++ b/include/linux/irqchip/irq-rvic.h
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Definitions for rVIC/rVID PV interrupt controller architecture.
+ *
+ * Copyright 2020 Google LLC.
+ * Author: Marc Zyngier <maz@kernel.org>
+ *
+ * WARNING: All these constants are subject to change until the spec is final.
+ */
+
+#ifndef __IRQCHIP_IRQ_RVIC_H__
+#define __IRQCHIP_IRQ_RVIC_H__
+
+#include <linux/bitfield.h>
+
+/* Versioning */
+#define RVIx_VERSION_MAJOR_MASK		GENMASK(31, 16)
+#define RVIx_VERSION_MINOR_MASK		GENMASK(15, 0)
+
+#define RVIx_VERSION(M, m)				\
+	(FIELD_PREP(RVIx_VERSION_MAJOR_MASK, (M)) |	\
+	 FIELD_PREP(RVIx_VERSION_MINOR_MASK, (m)))
+
+#define RVIx_VERSION_MAJOR(v)		FIELD_GET(RVIx_VERSION_MAJOR_MASK, (v))
+#define RVIx_VERSION_MINOR(v)		FIELD_GET(RVIx_VERSION_MINOR_MASK, (v))
+
+/* Error reporting */
+#define RVIx_STATUS_REASON_MASK		GENMASK(7, 0)
+#define RVIx_STATUS_INDEX_MASK		GENMASK(15, 8)
+
+#define RVIx_STATUS_PACK(r,i)				\
+	(FIELD_PREP(RVIx_STATUS_REASON_MASK, (r)) |	\
+	 FIELD_PREP(RVIx_STATUS_INDEX_MASK, (i)))
+
+#define RVIx_STATUS_REASON(c)		FIELD_GET(RVIx_STATUS_REASON_MASK, (c))
+#define RVIx_STATUS_INDEX(c)		FIELD_GET(RVIx_STATUS_INDEX_MASK, (c))
+
+#define RVIx_STATUS_SUCCESS		0
+#define RVIx_STATUS_ERROR_PARAMETER	1
+#define RVIx_STATUS_INVALID_CPU		2
+#define RVIx_STATUS_DISABLED		3
+#define RVIx_STATUS_NO_INTERRUPTS	4
+
+/* rVIC functions */
+#define SMC64_RVIC_BASE			0xc5000200
+#define SMC64_RVIC_FN(n)		(SMC64_RVIC_BASE + (n))
+
+#define SMC64_RVIC_VERSION		SMC64_RVIC_FN(0)
+#define SMC64_RVIC_INFO			SMC64_RVIC_FN(1)
+#define SMC64_RVIC_ENABLE		SMC64_RVIC_FN(2)
+#define SMC64_RVIC_DISABLE		SMC64_RVIC_FN(3)
+#define SMC64_RVIC_SET_MASKED		SMC64_RVIC_FN(4)
+#define SMC64_RVIC_CLEAR_MASKED		SMC64_RVIC_FN(5)
+#define SMC64_RVIC_IS_PENDING		SMC64_RVIC_FN(6)
+#define SMC64_RVIC_SIGNAL		SMC64_RVIC_FN(7)
+#define SMC64_RVIC_CLEAR_PENDING	SMC64_RVIC_FN(8)
+#define SMC64_RVIC_ACKNOWLEDGE		SMC64_RVIC_FN(9)
+#define SMC64_RVIC_RESAMPLE		SMC64_RVIC_FN(10)
+
+#define RVIC_INFO_KEY_NR_TRUSTED_INTERRUPTS	0
+#define RVIC_INFO_KEY_NR_UNTRUSTED_INTERRUPTS	1
+
+#define RVIC_VERSION(M, m)		RVIx_VERSION((M), (m))
+
+#define RVIC_VERSION_MAJOR(v)		RVIx_VERSION_MAJOR((v))
+#define RVIC_VERSION_MINOR(v)		RVIx_VERSION_MINOR((v))
+
+#define RVIC_STATUS_REASON(c)		RVIx_STATUS_REASON((c))
+#define RVIC_STATUS_INDEX(c)		RVIx_STATUS_INDEX((c))
+
+#define RVIC_STATUS_SUCCESS		RVIx_STATUS_SUCCESS
+#define RVIC_STATUS_ERROR_PARAMETER	RVIx_STATUS_ERROR_PARAMETER
+#define RVIC_STATUS_INVALID_CPU		RVIx_STATUS_INVALID_CPU
+#define RVIC_STATUS_DISABLED		RVIx_STATUS_DISABLED
+#define RVIC_STATUS_NO_INTERRUPTS	RVIx_STATUS_NO_INTERRUPTS
+
+#endif /* __IRQCHIP_IRQ_RVIC_H__ */
-- 
2.27.0

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