irqchip/gic-v4: Add management structure definitions

Add a bunch of GICv4-specific data structures that will get used in
subsequent patches.
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

include/linux/irqchip/arm-gic-v4.h

+/*
+ * Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H
+#define __LINUX_IRQCHIP_ARM_GIC_V4_H
+
+struct its_vpe;
+
+/* Embedded in kvm.arch */
+struct its_vm {
+	struct fwnode_handle	*fwnode;
+	struct irq_domain	*domain;
+	struct page		*vprop_page;
+	struct its_vpe		**vpes;
+	int			nr_vpes;
+	irq_hw_number_t		db_lpi_base;
+	unsigned long		*db_bitmap;
+	int			nr_db_lpis;
+};
+
+/* Embedded in kvm_vcpu.arch */
+struct its_vpe {
+	struct page 		*vpt_page;
+	struct its_vm		*its_vm;
+	/* Doorbell interrupt */
+	int			irq;
+	irq_hw_number_t		vpe_db_lpi;
+	/*
+	 * This collection ID is used to indirect the target
+	 * redistributor for this VPE. The ID itself isn't involved in
+	 * programming of the ITS.
+	 */
+	u16			col_idx;
+	/* Unique (system-wide) VPE identifier */
+	u16			vpe_id;
+	/* Implementation Defined Area Invalid */
+	bool			idai;
+	/* Pending VLPIs on schedule out? */
+	bool			pending_last;
+};
+
+/*
+ * struct its_vlpi_map: structure describing the mapping of a
+ * VLPI. Only to be interpreted in the context of a physical interrupt
+ * it complements.  To be used as the vcpu_info passed to
+ * irq_set_vcpu_affinity().
+ *
+ * @vm:		Pointer to the GICv4 notion of a VM
+ * @vpe:	Pointer to the GICv4 notion of a virtual CPU (VPE)
+ * @vintid:	Virtual LPI number
+ * @db_enabled:	Is the VPE doorbell to be generated?
+ */
+struct its_vlpi_map {
+	struct its_vm		*vm;
+	struct its_vpe		*vpe;
+	u32			vintid;
+	bool			db_enabled;
+};
+
+enum its_vcpu_info_cmd_type {
+	MAP_VLPI,
+	GET_VLPI,
+	PROP_UPDATE_VLPI,
+	PROP_UPDATE_AND_INV_VLPI,
+	SCHEDULE_VPE,
+	DESCHEDULE_VPE,
+	INVALL_VPE,
+};
+
+struct its_cmd_info {
+	enum its_vcpu_info_cmd_type	cmd_type;
+	union {
+		struct its_vlpi_map	*map;
+		u8			config;
+	};
+};
+
+#endif