/*
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* Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H
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#define __LINUX_IRQCHIP_ARM_GIC_V4_H
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struct its_vpe;
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/*
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* Maximum number of ITTs when GITS_TYPER.VMOVP == 0, using the
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* ITSList mechanism to perform inter-ITS synchronization.
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*/
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#define GICv4_ITS_LIST_MAX 16
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/* Embedded in kvm.arch */
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struct its_vm {
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struct fwnode_handle *fwnode;
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struct irq_domain *domain;
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struct page *vprop_page;
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struct its_vpe **vpes;
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int nr_vpes;
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irq_hw_number_t db_lpi_base;
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unsigned long *db_bitmap;
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int nr_db_lpis;
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u32 vlpi_count[GICv4_ITS_LIST_MAX];
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};
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/* Embedded in kvm_vcpu.arch */
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struct its_vpe {
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struct page *vpt_page;
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struct its_vm *its_vm;
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/* Doorbell interrupt */
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int irq;
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irq_hw_number_t vpe_db_lpi;
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/* VPE proxy mapping */
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int vpe_proxy_event;
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/*
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* This collection ID is used to indirect the target
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* redistributor for this VPE. The ID itself isn't involved in
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* programming of the ITS.
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*/
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u16 col_idx;
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/* Unique (system-wide) VPE identifier */
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u16 vpe_id;
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/* Implementation Defined Area Invalid */
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bool idai;
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/* Pending VLPIs on schedule out? */
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bool pending_last;
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};
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/*
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* struct its_vlpi_map: structure describing the mapping of a
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* VLPI. Only to be interpreted in the context of a physical interrupt
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* it complements. To be used as the vcpu_info passed to
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* irq_set_vcpu_affinity().
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*
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* @vm: Pointer to the GICv4 notion of a VM
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* @vpe: Pointer to the GICv4 notion of a virtual CPU (VPE)
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* @vintid: Virtual LPI number
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* @properties: Priority and enable bits (as written in the prop table)
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* @db_enabled: Is the VPE doorbell to be generated?
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*/
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struct its_vlpi_map {
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struct its_vm *vm;
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struct its_vpe *vpe;
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u32 vintid;
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u8 properties;
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bool db_enabled;
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};
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enum its_vcpu_info_cmd_type {
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MAP_VLPI,
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GET_VLPI,
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PROP_UPDATE_VLPI,
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PROP_UPDATE_AND_INV_VLPI,
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SCHEDULE_VPE,
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DESCHEDULE_VPE,
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INVALL_VPE,
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};
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struct its_cmd_info {
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enum its_vcpu_info_cmd_type cmd_type;
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union {
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struct its_vlpi_map *map;
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u8 config;
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};
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};
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int its_alloc_vcpu_irqs(struct its_vm *vm);
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void its_free_vcpu_irqs(struct its_vm *vm);
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int its_schedule_vpe(struct its_vpe *vpe, bool on);
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int its_invall_vpe(struct its_vpe *vpe);
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int its_map_vlpi(int irq, struct its_vlpi_map *map);
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int its_get_vlpi(int irq, struct its_vlpi_map *map);
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int its_unmap_vlpi(int irq);
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int its_prop_update_vlpi(int irq, u8 config, bool inv);
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struct irq_domain_ops;
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int its_init_v4(struct irq_domain *domain, const struct irq_domain_ops *ops);
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#endif
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