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Commit de29faa0 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

irqchip/gic-v4: Add management structure definitions 



Add a bunch of GICv4-specific data structures that will get used in
subsequent patches.

Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent adcdb94e

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

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+92 −0
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/*

 * 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