cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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arm-gic-v4.h (3605B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
      4 * Author: Marc Zyngier <marc.zyngier@arm.com>
      5 */
      6
      7#ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H
      8#define __LINUX_IRQCHIP_ARM_GIC_V4_H
      9
     10struct its_vpe;
     11
     12/*
     13 * Maximum number of ITTs when GITS_TYPER.VMOVP == 0, using the
     14 * ITSList mechanism to perform inter-ITS synchronization.
     15 */
     16#define GICv4_ITS_LIST_MAX		16
     17
     18/* Embedded in kvm.arch */
     19struct its_vm {
     20	struct fwnode_handle	*fwnode;
     21	struct irq_domain	*domain;
     22	struct page		*vprop_page;
     23	struct its_vpe		**vpes;
     24	int			nr_vpes;
     25	irq_hw_number_t		db_lpi_base;
     26	unsigned long		*db_bitmap;
     27	int			nr_db_lpis;
     28	u32			vlpi_count[GICv4_ITS_LIST_MAX];
     29};
     30
     31/* Embedded in kvm_vcpu.arch */
     32struct its_vpe {
     33	struct page 		*vpt_page;
     34	struct its_vm		*its_vm;
     35	/* per-vPE VLPI tracking */
     36	atomic_t		vlpi_count;
     37	/* Doorbell interrupt */
     38	int			irq;
     39	irq_hw_number_t		vpe_db_lpi;
     40	/* VPE resident */
     41	bool			resident;
     42	/* VPT parse complete */
     43	bool			ready;
     44	union {
     45		/* GICv4.0 implementations */
     46		struct {
     47			/* VPE proxy mapping */
     48			int	vpe_proxy_event;
     49			/* Implementation Defined Area Invalid */
     50			bool	idai;
     51		};
     52		/* GICv4.1 implementations */
     53		struct {
     54			struct fwnode_handle	*fwnode;
     55			struct irq_domain	*sgi_domain;
     56			struct {
     57				u8	priority;
     58				bool	enabled;
     59				bool	group;
     60			}			sgi_config[16];
     61			atomic_t vmapp_count;
     62		};
     63	};
     64
     65	/*
     66	 * Ensures mutual exclusion between affinity setting of the
     67	 * vPE and vLPI operations using vpe->col_idx.
     68	 */
     69	raw_spinlock_t		vpe_lock;
     70	/*
     71	 * This collection ID is used to indirect the target
     72	 * redistributor for this VPE. The ID itself isn't involved in
     73	 * programming of the ITS.
     74	 */
     75	u16			col_idx;
     76	/* Unique (system-wide) VPE identifier */
     77	u16			vpe_id;
     78	/* Pending VLPIs on schedule out? */
     79	bool			pending_last;
     80};
     81
     82/*
     83 * struct its_vlpi_map: structure describing the mapping of a
     84 * VLPI. Only to be interpreted in the context of a physical interrupt
     85 * it complements.  To be used as the vcpu_info passed to
     86 * irq_set_vcpu_affinity().
     87 *
     88 * @vm:		Pointer to the GICv4 notion of a VM
     89 * @vpe:	Pointer to the GICv4 notion of a virtual CPU (VPE)
     90 * @vintid:	Virtual LPI number
     91 * @properties:	Priority and enable bits (as written in the prop table)
     92 * @db_enabled:	Is the VPE doorbell to be generated?
     93 */
     94struct its_vlpi_map {
     95	struct its_vm		*vm;
     96	struct its_vpe		*vpe;
     97	u32			vintid;
     98	u8			properties;
     99	bool			db_enabled;
    100};
    101
    102enum its_vcpu_info_cmd_type {
    103	MAP_VLPI,
    104	GET_VLPI,
    105	PROP_UPDATE_VLPI,
    106	PROP_UPDATE_AND_INV_VLPI,
    107	SCHEDULE_VPE,
    108	DESCHEDULE_VPE,
    109	COMMIT_VPE,
    110	INVALL_VPE,
    111	PROP_UPDATE_VSGI,
    112};
    113
    114struct its_cmd_info {
    115	enum its_vcpu_info_cmd_type	cmd_type;
    116	union {
    117		struct its_vlpi_map	*map;
    118		u8			config;
    119		bool			req_db;
    120		struct {
    121			bool		g0en;
    122			bool		g1en;
    123		};
    124		struct {
    125			u8		priority;
    126			bool		group;
    127		};
    128	};
    129};
    130
    131int its_alloc_vcpu_irqs(struct its_vm *vm);
    132void its_free_vcpu_irqs(struct its_vm *vm);
    133int its_make_vpe_resident(struct its_vpe *vpe, bool g0en, bool g1en);
    134int its_make_vpe_non_resident(struct its_vpe *vpe, bool db);
    135int its_commit_vpe(struct its_vpe *vpe);
    136int its_invall_vpe(struct its_vpe *vpe);
    137int its_map_vlpi(int irq, struct its_vlpi_map *map);
    138int its_get_vlpi(int irq, struct its_vlpi_map *map);
    139int its_unmap_vlpi(int irq);
    140int its_prop_update_vlpi(int irq, u8 config, bool inv);
    141int its_prop_update_vsgi(int irq, u8 priority, bool group);
    142
    143struct irq_domain_ops;
    144int its_init_v4(struct irq_domain *domain,
    145		const struct irq_domain_ops *vpe_ops,
    146		const struct irq_domain_ops *sgi_ops);
    147
    148bool gic_cpuif_has_vsgi(void);
    149
    150#endif