Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq core updates from Thomas Gleixner:
 "A rather large update for the interrupt core code and the irq chip drivers:

   - Add a new bitmap matrix allocator and supporting changes, which is
     used to replace the x86 vector allocator which comes with separate
     pull request. This allows to replace the convoluted nested loop
     allocation function in x86 with a facility which supports the
     recently added property of managed interrupts proper and allows to
     switch to a best effort vector reservation scheme, which addresses
     problems with vector exhaustion.

   - A large update to the ARM GIC-V3-ITS driver adding support for
     range selectors.

   - New interrupt controllers:
       - Meson and Meson8 GPIO
       - BCM7271 L2
       - Socionext EXIU

     If you expected that this will stop at some point, I have to
     disappoint you. There are new ones posted already. Sigh!

   - STM32 interrupt controller support for new platforms.

   - A pile of fixes, cleanups and updates to the MIPS GIC driver

   - The usual small fixes, cleanups and updates all over the place.
     Most visible one is to move the irq chip drivers Kconfig switches
     into a separate Kconfig menu"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits)
  genirq: Fix type of shifting literal 1 in __setup_irq()
  irqdomain: Drop pointless NULL check in virq_debug_show_one
  genirq/proc: Return proper error code when irq_set_affinity() fails
  irq/work: Use llist_for_each_entry_safe
  irqchip: mips-gic: Print warning if inherited GIC base is used
  irqchip/mips-gic: Add pr_fmt and reword pr_* messages
  irqchip/stm32: Move the wakeup on interrupt mask
  irqchip/stm32: Fix initial values
  irqchip/stm32: Add stm32h7 support
  dt-bindings/interrupt-controllers: Add compatible string for stm32h7
  irqchip/stm32: Add multi-bank management
  irqchip/stm32: Select GENERIC_IRQ_CHIP
  irqchip/exiu: Add support for Socionext Synquacer EXIU controller
  dt-bindings: Add description of Socionext EXIU interrupt controller
  irqchip/gic-v3-its: Fix VPE activate callback return value
  irqchip: mips-gic: Make IPI bitmaps static
  irqchip: mips-gic: Share register writes in gic_set_type()
  irqchip: mips-gic: Remove gic_vpes variable
  irqchip: mips-gic: Use num_possible_cpus() to reserve IPIs
  irqchip: mips-gic: Configure EIC when CPUs come online
  ...

9 files changed, 254 insertions, 11 deletions

diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 2477a5cb5bd5..ec32c4c5eb30 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -99,6 +99,7 @@ enum cpuhp_state {
 	CPUHP_AP_IRQ_HIP04_STARTING,
 	CPUHP_AP_IRQ_ARMADA_XP_STARTING,
 	CPUHP_AP_IRQ_BCM2836_STARTING,
+	CPUHP_AP_IRQ_MIPS_GIC_STARTING,
 	CPUHP_AP_ARM_MVEBU_COHERENCY,
 	CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
 	CPUHP_AP_PERF_X86_STARTING,
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 4536286cc4d2..b01d06db9101 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -1114,6 +1114,28 @@ static inline u32 irq_reg_readl(struct irq_chip_generic *gc,
 		return readl(gc->reg_base + reg_offset);
 }
 
+struct irq_matrix;
+struct irq_matrix *irq_alloc_matrix(unsigned int matrix_bits,
+				    unsigned int alloc_start,
+				    unsigned int alloc_end);
+void irq_matrix_online(struct irq_matrix *m);
+void irq_matrix_offline(struct irq_matrix *m);
+void irq_matrix_assign_system(struct irq_matrix *m, unsigned int bit, bool replace);
+int irq_matrix_reserve_managed(struct irq_matrix *m, const struct cpumask *msk);
+void irq_matrix_remove_managed(struct irq_matrix *m, const struct cpumask *msk);
+int irq_matrix_alloc_managed(struct irq_matrix *m, unsigned int cpu);
+void irq_matrix_reserve(struct irq_matrix *m);
+void irq_matrix_remove_reserved(struct irq_matrix *m);
+int irq_matrix_alloc(struct irq_matrix *m, const struct cpumask *msk,
+		     bool reserved, unsigned int *mapped_cpu);
+void irq_matrix_free(struct irq_matrix *m, unsigned int cpu,
+		     unsigned int bit, bool managed);
+void irq_matrix_assign(struct irq_matrix *m, unsigned int bit);
+unsigned int irq_matrix_available(struct irq_matrix *m, bool cpudown);
+unsigned int irq_matrix_allocated(struct irq_matrix *m);
+unsigned int irq_matrix_reserved(struct irq_matrix *m);
+void irq_matrix_debug_show(struct seq_file *sf, struct irq_matrix *m, int ind);
+
 /* Contrary to Linux irqs, for hardware irqs the irq number 0 is valid */
 #define INVALID_HWIRQ	(~0UL)
 irq_hw_number_t ipi_get_hwirq(unsigned int irq, unsigned int cpu);
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index 14b74f22d43c..c00c4c33e432 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -68,6 +68,7 @@
 #define GICD_CTLR_ENABLE_SS_G1		(1U << 1)
 #define GICD_CTLR_ENABLE_SS_G0		(1U << 0)
 
+#define GICD_TYPER_RSS			(1U << 26)
 #define GICD_TYPER_LPIS			(1U << 17)
 #define GICD_TYPER_MBIS			(1U << 16)
 
@@ -461,6 +462,7 @@
 #define ICC_CTLR_EL1_SEIS_MASK		(0x1 << ICC_CTLR_EL1_SEIS_SHIFT)
 #define ICC_CTLR_EL1_A3V_SHIFT		15
 #define ICC_CTLR_EL1_A3V_MASK		(0x1 << ICC_CTLR_EL1_A3V_SHIFT)
+#define ICC_CTLR_EL1_RSS		(0x1 << 18)
 #define ICC_PMR_EL1_SHIFT		0
 #define ICC_PMR_EL1_MASK		(0xff << ICC_PMR_EL1_SHIFT)
 #define ICC_BPR0_EL1_SHIFT		0
@@ -549,6 +551,8 @@
 #define ICC_SGI1R_AFFINITY_2_SHIFT	32
 #define ICC_SGI1R_AFFINITY_2_MASK	(0xffULL << ICC_SGI1R_AFFINITY_2_SHIFT)
 #define ICC_SGI1R_IRQ_ROUTING_MODE_BIT	40
+#define ICC_SGI1R_RS_SHIFT		44
+#define ICC_SGI1R_RS_MASK		(0xfULL << ICC_SGI1R_RS_SHIFT)
 #define ICC_SGI1R_AFFINITY_3_SHIFT	48
 #define ICC_SGI1R_AFFINITY_3_MASK	(0xffULL << ICC_SGI1R_AFFINITY_3_SHIFT)
 
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 58a4d89aa82c..447da8ca2156 100644
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -20,6 +20,12 @@
 
 struct its_vpe;
 
+/*
+ * Maximum number of ITTs when GITS_TYPER.VMOVP == 0, using the
+ * ITSList mechanism to perform inter-ITS synchronization.
+ */
+#define GICv4_ITS_LIST_MAX		16
+
 /* Embedded in kvm.arch */
 struct its_vm {
 	struct fwnode_handle	*fwnode;
@@ -30,6 +36,7 @@ struct its_vm {
 	irq_hw_number_t		db_lpi_base;
 	unsigned long		*db_bitmap;
 	int			nr_db_lpis;
+	u32			vlpi_count[GICv4_ITS_LIST_MAX];
 };
 
 /* Embedded in kvm_vcpu.arch */
@@ -64,12 +71,14 @@ struct its_vpe {
  * @vm:		Pointer to the GICv4 notion of a VM
  * @vpe:	Pointer to the GICv4 notion of a virtual CPU (VPE)
  * @vintid:	Virtual LPI number
+ * @properties:	Priority and enable bits (as written in the prop table)
  * @db_enabled:	Is the VPE doorbell to be generated?
  */
 struct its_vlpi_map {
 	struct its_vm		*vm;
 	struct its_vpe		*vpe;
 	u32			vintid;
+	u8			properties;
 	bool			db_enabled;
 };
 
diff --git a/include/linux/irqchip/irq-omap-intc.h b/include/linux/irqchip/irq-omap-intc.h
index 2e3d1afeb674..f19ccee7749f 100644
--- a/include/linux/irqchip/irq-omap-intc.h
+++ b/include/linux/irqchip/irq-omap-intc.h
@@ -18,8 +18,6 @@
 #ifndef __INCLUDE_LINUX_IRQCHIP_IRQ_OMAP_INTC_H
 #define __INCLUDE_LINUX_IRQCHIP_IRQ_OMAP_INTC_H
 
-void omap3_init_irq(void);
-
 int omap_irq_pending(void);
 void omap_intc_save_context(void);
 void omap_intc_restore_context(void);
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index b6084898d330..60e3100b0809 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -94,6 +94,7 @@ struct irq_desc {
 #endif
 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
 	struct dentry		*debugfs_file;
+	const char		*dev_name;
 #endif
 #ifdef CONFIG_SPARSE_IRQ
 	struct rcu_head		rcu;
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index b1037dfc47e4..a34355d19546 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -33,6 +33,7 @@
 #include <linux/types.h>
 #include <linux/irqhandler.h>
 #include <linux/of.h>
+#include <linux/mutex.h>
 #include <linux/radix-tree.h>
 
 struct device_node;
@@ -41,6 +42,7 @@ struct of_device_id;
 struct irq_chip;
 struct irq_data;
 struct cpumask;
+struct seq_file;
 
 /* Number of irqs reserved for a legacy isa controller */
 #define NUM_ISA_INTERRUPTS	16
@@ -105,18 +107,21 @@ struct irq_domain_ops {
 	int (*xlate)(struct irq_domain *d, struct device_node *node,
 		     const u32 *intspec, unsigned int intsize,
 		     unsigned long *out_hwirq, unsigned int *out_type);
-
 #ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY
 	/* extended V2 interfaces to support hierarchy irq_domains */
 	int (*alloc)(struct irq_domain *d, unsigned int virq,
 		     unsigned int nr_irqs, void *arg);
 	void (*free)(struct irq_domain *d, unsigned int virq,
 		     unsigned int nr_irqs);
-	void (*activate)(struct irq_domain *d, struct irq_data *irq_data);
+	int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool early);
 	void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
 	int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec,
 			 unsigned long *out_hwirq, unsigned int *out_type);
 #endif
+#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
+	void (*debug_show)(struct seq_file *m, struct irq_domain *d,
+			   struct irq_data *irqd, int ind);
+#endif
 };
 
 extern struct irq_domain_ops irq_generic_chip_ops;
@@ -134,8 +139,8 @@ struct irq_domain_chip_generic;
  * @mapcount: The number of mapped interrupts
  *
  * Optional elements
- * @of_node: Pointer to device tree nodes associated with the irq_domain. Used
- *           when decoding device tree interrupt specifiers.
+ * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy
+ *          to swap it for the of_node via the irq_domain_get_of_node accessor
  * @gc: Pointer to a list of generic chips. There is a helper function for
  *      setting up one or more generic chips for interrupt controllers
  *      drivers using the generic chip library which uses this pointer.
@@ -173,6 +178,7 @@ struct irq_domain {
 	unsigned int revmap_direct_max_irq;
 	unsigned int revmap_size;
 	struct radix_tree_root revmap_tree;
+	struct mutex revmap_tree_mutex;
 	unsigned int linear_revmap[];
 };
 
@@ -438,7 +444,7 @@ extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
 				   unsigned int nr_irqs, int node, void *arg,
 				   bool realloc, const struct cpumask *affinity);
 extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs);
-extern void irq_domain_activate_irq(struct irq_data *irq_data);
+extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early);
 extern void irq_domain_deactivate_irq(struct irq_data *irq_data);
 
 static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
@@ -508,8 +514,6 @@ static inline bool irq_domain_is_msi_remap(struct irq_domain *domain)
 extern bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain);
 
 #else	/* CONFIG_IRQ_DOMAIN_HIERARCHY */
-static inline void irq_domain_activate_irq(struct irq_data *data) { }
-static inline void irq_domain_deactivate_irq(struct irq_data *data) { }
 static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
 			unsigned int nr_irqs, int node, void *arg)
 {
@@ -558,8 +562,6 @@ irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
 
 #else /* CONFIG_IRQ_DOMAIN */
 static inline void irq_dispose_mapping(unsigned int virq) { }
-static inline void irq_domain_activate_irq(struct irq_data *data) { }
-static inline void irq_domain_deactivate_irq(struct irq_data *data) { }
 static inline struct irq_domain *irq_find_matching_fwnode(
 	struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token)
 {
diff --git a/include/linux/msi.h b/include/linux/msi.h
index cdd069cf9ed8..1f1bbb5b4679 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -284,6 +284,11 @@ enum {
 	MSI_FLAG_PCI_MSIX		= (1 << 3),
 	/* Needs early activate, required for PCI */
 	MSI_FLAG_ACTIVATE_EARLY		= (1 << 4),
+	/*
+	 * Must reactivate when irq is started even when
+	 * MSI_FLAG_ACTIVATE_EARLY has been set.
+	 */
+	MSI_FLAG_MUST_REACTIVATE	= (1 << 5),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
diff --git a/include/trace/events/irq_matrix.h b/include/trace/events/irq_matrix.h
new file mode 100644
index 000000000000..267d4cbbf360
--- /dev/null
+++ b/include/trace/events/irq_matrix.h
@@ -0,0 +1,201 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM irq_matrix
+
+#if !defined(_TRACE_IRQ_MATRIX_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IRQ_MATRIX_H
+
+#include <linux/tracepoint.h>
+
+struct irq_matrix;
+struct cpumap;
+
+DECLARE_EVENT_CLASS(irq_matrix_global,
+
+	TP_PROTO(struct irq_matrix *matrix),
+
+	TP_ARGS(matrix),
+
+	TP_STRUCT__entry(
+		__field(	unsigned int,	online_maps		)
+		__field(	unsigned int,	global_available	)
+		__field(	unsigned int,	global_reserved		)
+		__field(	unsigned int,	total_allocated		)
+	),
+
+	TP_fast_assign(
+		__entry->online_maps		= matrix->online_maps;
+		__entry->global_available	= matrix->global_available;
+		__entry->global_reserved	= matrix->global_reserved;
+		__entry->total_allocated	= matrix->total_allocated;
+	),
+
+	TP_printk("online_maps=%d global_avl=%u, global_rsvd=%u, total_alloc=%u",
+		  __entry->online_maps, __entry->global_available,
+		  __entry->global_reserved, __entry->total_allocated)
+);
+
+DECLARE_EVENT_CLASS(irq_matrix_global_update,
+
+	TP_PROTO(int bit, struct irq_matrix *matrix),
+
+	TP_ARGS(bit, matrix),
+
+	TP_STRUCT__entry(
+		__field(	int,		bit			)
+		__field(	unsigned int,	online_maps		)
+		__field(	unsigned int,	global_available	)
+		__field(	unsigned int,	global_reserved		)
+		__field(	unsigned int,	total_allocated		)
+	),
+
+	TP_fast_assign(
+		__entry->bit			= bit;
+		__entry->online_maps		= matrix->online_maps;
+		__entry->global_available	= matrix->global_available;
+		__entry->global_reserved	= matrix->global_reserved;
+		__entry->total_allocated	= matrix->total_allocated;
+	),
+
+	TP_printk("bit=%d online_maps=%d global_avl=%u, global_rsvd=%u, total_alloc=%u",
+		  __entry->bit, __entry->online_maps,
+		  __entry->global_available, __entry->global_reserved,
+		  __entry->total_allocated)
+);
+
+DECLARE_EVENT_CLASS(irq_matrix_cpu,
+
+	TP_PROTO(int bit, unsigned int cpu, struct irq_matrix *matrix,
+		 struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap),
+
+	TP_STRUCT__entry(
+		__field(	int,		bit			)
+		__field(	unsigned int,	cpu			)
+		__field(	bool,		online			)
+		__field(	unsigned int,	available		)
+		__field(	unsigned int,	allocated		)
+		__field(	unsigned int,	managed			)
+		__field(	unsigned int,	online_maps		)
+		__field(	unsigned int,	global_available	)
+		__field(	unsigned int,	global_reserved		)
+		__field(	unsigned int,	total_allocated		)
+	),
+
+	TP_fast_assign(
+		__entry->bit			= bit;
+		__entry->cpu			= cpu;
+		__entry->online			= cmap->online;
+		__entry->available		= cmap->available;
+		__entry->allocated		= cmap->allocated;
+		__entry->managed		= cmap->managed;
+		__entry->online_maps		= matrix->online_maps;
+		__entry->global_available	= matrix->global_available;
+		__entry->global_reserved	= matrix->global_reserved;
+		__entry->total_allocated	= matrix->total_allocated;
+	),
+
+	TP_printk("bit=%d cpu=%u online=%d avl=%u alloc=%u managed=%u online_maps=%u global_avl=%u, global_rsvd=%u, total_alloc=%u",
+		  __entry->bit, __entry->cpu, __entry->online,
+		  __entry->available, __entry->allocated,
+		  __entry->managed, __entry->online_maps,
+		  __entry->global_available, __entry->global_reserved,
+		  __entry->total_allocated)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_online,
+
+	TP_PROTO(struct irq_matrix *matrix),
+
+	TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_offline,
+
+	TP_PROTO(struct irq_matrix *matrix),
+
+	TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_reserve,
+
+	TP_PROTO(struct irq_matrix *matrix),
+
+	TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_remove_reserved,
+
+	TP_PROTO(struct irq_matrix *matrix),
+
+	TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global_update, irq_matrix_assign_system,
+
+	TP_PROTO(int bit, struct irq_matrix *matrix),
+
+	TP_ARGS(bit, matrix)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_alloc_reserved,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_reserve_managed,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_remove_managed,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_alloc_managed,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_assign,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_alloc,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_free,
+
+	TP_PROTO(int bit, unsigned int cpu,
+		 struct irq_matrix *matrix, struct cpumap *cmap),
+
+	TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+
+#endif /*  _TRACE_IRQ_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>