Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 434 insertions, 0 deletions

diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
new file mode 100644
index 000000000..1d7d4cffa
--- /dev/null
+++ b/include/kvm/arm_vgic.h
@@ -0,0 +1,434 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015, 2016 ARM Ltd.
+ */
+#ifndef __KVM_ARM_VGIC_H
+#define __KVM_ARM_VGIC_H
+
+#include <linux/bits.h>
+#include <linux/kvm.h>
+#include <linux/irqreturn.h>
+#include <linux/kref.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/static_key.h>
+#include <linux/types.h>
+#include <kvm/iodev.h>
+#include <linux/list.h>
+#include <linux/jump_label.h>
+
+#include <linux/irqchip/arm-gic-v4.h>
+
+#define VGIC_V3_MAX_CPUS	512
+#define VGIC_V2_MAX_CPUS	8
+#define VGIC_NR_IRQS_LEGACY     256
+#define VGIC_NR_SGIS		16
+#define VGIC_NR_PPIS		16
+#define VGIC_NR_PRIVATE_IRQS	(VGIC_NR_SGIS + VGIC_NR_PPIS)
+#define VGIC_MAX_PRIVATE	(VGIC_NR_PRIVATE_IRQS - 1)
+#define VGIC_MAX_SPI		1019
+#define VGIC_MAX_RESERVED	1023
+#define VGIC_MIN_LPI		8192
+#define KVM_IRQCHIP_NUM_PINS	(1020 - 32)
+
+#define irq_is_ppi(irq) ((irq) >= VGIC_NR_SGIS && (irq) < VGIC_NR_PRIVATE_IRQS)
+#define irq_is_spi(irq) ((irq) >= VGIC_NR_PRIVATE_IRQS && \
+			 (irq) <= VGIC_MAX_SPI)
+
+enum vgic_type {
+	VGIC_V2,		/* Good ol' GICv2 */
+	VGIC_V3,		/* New fancy GICv3 */
+};
+
+/* same for all guests, as depending only on the _host's_ GIC model */
+struct vgic_global {
+	/* type of the host GIC */
+	enum vgic_type		type;
+
+	/* Physical address of vgic virtual cpu interface */
+	phys_addr_t		vcpu_base;
+
+	/* GICV mapping, kernel VA */
+	void __iomem		*vcpu_base_va;
+	/* GICV mapping, HYP VA */
+	void __iomem		*vcpu_hyp_va;
+
+	/* virtual control interface mapping, kernel VA */
+	void __iomem		*vctrl_base;
+	/* virtual control interface mapping, HYP VA */
+	void __iomem		*vctrl_hyp;
+
+	/* Number of implemented list registers */
+	int			nr_lr;
+
+	/* Maintenance IRQ number */
+	unsigned int		maint_irq;
+
+	/* maximum number of VCPUs allowed (GICv2 limits us to 8) */
+	int			max_gic_vcpus;
+
+	/* Only needed for the legacy KVM_CREATE_IRQCHIP */
+	bool			can_emulate_gicv2;
+
+	/* Hardware has GICv4? */
+	bool			has_gicv4;
+	bool			has_gicv4_1;
+
+	/* Pseudo GICv3 from outer space */
+	bool			no_hw_deactivation;
+
+	/* GIC system register CPU interface */
+	struct static_key_false gicv3_cpuif;
+
+	u32			ich_vtr_el2;
+};
+
+extern struct vgic_global kvm_vgic_global_state;
+
+#define VGIC_V2_MAX_LRS		(1 << 6)
+#define VGIC_V3_MAX_LRS		16
+#define VGIC_V3_LR_INDEX(lr)	(VGIC_V3_MAX_LRS - 1 - lr)
+
+enum vgic_irq_config {
+	VGIC_CONFIG_EDGE = 0,
+	VGIC_CONFIG_LEVEL
+};
+
+/*
+ * Per-irq ops overriding some common behavious.
+ *
+ * Always called in non-preemptible section and the functions can use
+ * kvm_arm_get_running_vcpu() to get the vcpu pointer for private IRQs.
+ */
+struct irq_ops {
+	/* Per interrupt flags for special-cased interrupts */
+	unsigned long flags;
+
+#define VGIC_IRQ_SW_RESAMPLE	BIT(0)	/* Clear the active state for resampling */
+
+	/*
+	 * Callback function pointer to in-kernel devices that can tell us the
+	 * state of the input level of mapped level-triggered IRQ faster than
+	 * peaking into the physical GIC.
+	 */
+	bool (*get_input_level)(int vintid);
+};
+
+struct vgic_irq {
+	raw_spinlock_t irq_lock;	/* Protects the content of the struct */
+	struct list_head lpi_list;	/* Used to link all LPIs together */
+	struct list_head ap_list;
+
+	struct kvm_vcpu *vcpu;		/* SGIs and PPIs: The VCPU
+					 * SPIs and LPIs: The VCPU whose ap_list
+					 * this is queued on.
+					 */
+
+	struct kvm_vcpu *target_vcpu;	/* The VCPU that this interrupt should
+					 * be sent to, as a result of the
+					 * targets reg (v2) or the
+					 * affinity reg (v3).
+					 */
+
+	u32 intid;			/* Guest visible INTID */
+	bool line_level;		/* Level only */
+	bool pending_latch;		/* The pending latch state used to calculate
+					 * the pending state for both level
+					 * and edge triggered IRQs. */
+	bool active;			/* not used for LPIs */
+	bool enabled;
+	bool hw;			/* Tied to HW IRQ */
+	struct kref refcount;		/* Used for LPIs */
+	u32 hwintid;			/* HW INTID number */
+	unsigned int host_irq;		/* linux irq corresponding to hwintid */
+	union {
+		u8 targets;			/* GICv2 target VCPUs mask */
+		u32 mpidr;			/* GICv3 target VCPU */
+	};
+	u8 source;			/* GICv2 SGIs only */
+	u8 active_source;		/* GICv2 SGIs only */
+	u8 priority;
+	u8 group;			/* 0 == group 0, 1 == group 1 */
+	enum vgic_irq_config config;	/* Level or edge */
+
+	struct irq_ops *ops;
+
+	void *owner;			/* Opaque pointer to reserve an interrupt
+					   for in-kernel devices. */
+};
+
+static inline bool vgic_irq_needs_resampling(struct vgic_irq *irq)
+{
+	return irq->ops && (irq->ops->flags & VGIC_IRQ_SW_RESAMPLE);
+}
+
+struct vgic_register_region;
+struct vgic_its;
+
+enum iodev_type {
+	IODEV_CPUIF,
+	IODEV_DIST,
+	IODEV_REDIST,
+	IODEV_ITS
+};
+
+struct vgic_io_device {
+	gpa_t base_addr;
+	union {
+		struct kvm_vcpu *redist_vcpu;
+		struct vgic_its *its;
+	};
+	const struct vgic_register_region *regions;
+	enum iodev_type iodev_type;
+	int nr_regions;
+	struct kvm_io_device dev;
+};
+
+struct vgic_its {
+	/* The base address of the ITS control register frame */
+	gpa_t			vgic_its_base;
+
+	bool			enabled;
+	struct vgic_io_device	iodev;
+	struct kvm_device	*dev;
+
+	/* These registers correspond to GITS_BASER{0,1} */
+	u64			baser_device_table;
+	u64			baser_coll_table;
+
+	/* Protects the command queue */
+	struct mutex		cmd_lock;
+	u64			cbaser;
+	u32			creadr;
+	u32			cwriter;
+
+	/* migration ABI revision in use */
+	u32			abi_rev;
+
+	/* Protects the device and collection lists */
+	struct mutex		its_lock;
+	struct list_head	device_list;
+	struct list_head	collection_list;
+};
+
+struct vgic_state_iter;
+
+struct vgic_redist_region {
+	u32 index;
+	gpa_t base;
+	u32 count; /* number of redistributors or 0 if single region */
+	u32 free_index; /* index of the next free redistributor */
+	struct list_head list;
+};
+
+struct vgic_dist {
+	bool			in_kernel;
+	bool			ready;
+	bool			initialized;
+
+	/* vGIC model the kernel emulates for the guest (GICv2 or GICv3) */
+	u32			vgic_model;
+
+	/* Implementation revision as reported in the GICD_IIDR */
+	u32			implementation_rev;
+#define KVM_VGIC_IMP_REV_2	2 /* GICv2 restorable groups */
+#define KVM_VGIC_IMP_REV_3	3 /* GICv3 GICR_CTLR.{IW,CES,RWP} */
+#define KVM_VGIC_IMP_REV_LATEST	KVM_VGIC_IMP_REV_3
+
+	/* Userspace can write to GICv2 IGROUPR */
+	bool			v2_groups_user_writable;
+
+	/* Do injected MSIs require an additional device ID? */
+	bool			msis_require_devid;
+
+	int			nr_spis;
+
+	/* base addresses in guest physical address space: */
+	gpa_t			vgic_dist_base;		/* distributor */
+	union {
+		/* either a GICv2 CPU interface */
+		gpa_t			vgic_cpu_base;
+		/* or a number of GICv3 redistributor regions */
+		struct list_head rd_regions;
+	};
+
+	/* distributor enabled */
+	bool			enabled;
+
+	/* Wants SGIs without active state */
+	bool			nassgireq;
+
+	struct vgic_irq		*spis;
+
+	struct vgic_io_device	dist_iodev;
+
+	bool			has_its;
+
+	/*
+	 * Contains the attributes and gpa of the LPI configuration table.
+	 * Since we report GICR_TYPER.CommonLPIAff as 0b00, we can share
+	 * one address across all redistributors.
+	 * GICv3 spec: IHI 0069E 6.1.1 "LPI Configuration tables"
+	 */
+	u64			propbaser;
+
+	/* Protects the lpi_list and the count value below. */
+	raw_spinlock_t		lpi_list_lock;
+	struct list_head	lpi_list_head;
+	int			lpi_list_count;
+
+	/* LPI translation cache */
+	struct list_head	lpi_translation_cache;
+
+	/* used by vgic-debug */
+	struct vgic_state_iter *iter;
+
+	/*
+	 * GICv4 ITS per-VM data, containing the IRQ domain, the VPE
+	 * array, the property table pointer as well as allocation
+	 * data. This essentially ties the Linux IRQ core and ITS
+	 * together, and avoids leaking KVM's data structures anywhere
+	 * else.
+	 */
+	struct its_vm		its_vm;
+};
+
+struct vgic_v2_cpu_if {
+	u32		vgic_hcr;
+	u32		vgic_vmcr;
+	u32		vgic_apr;
+	u32		vgic_lr[VGIC_V2_MAX_LRS];
+
+	unsigned int used_lrs;
+};
+
+struct vgic_v3_cpu_if {
+	u32		vgic_hcr;
+	u32		vgic_vmcr;
+	u32		vgic_sre;	/* Restored only, change ignored */
+	u32		vgic_ap0r[4];
+	u32		vgic_ap1r[4];
+	u64		vgic_lr[VGIC_V3_MAX_LRS];
+
+	/*
+	 * GICv4 ITS per-VPE data, containing the doorbell IRQ, the
+	 * pending table pointer, the its_vm pointer and a few other
+	 * HW specific things. As for the its_vm structure, this is
+	 * linking the Linux IRQ subsystem and the ITS together.
+	 */
+	struct its_vpe	its_vpe;
+
+	unsigned int used_lrs;
+};
+
+struct vgic_cpu {
+	/* CPU vif control registers for world switch */
+	union {
+		struct vgic_v2_cpu_if	vgic_v2;
+		struct vgic_v3_cpu_if	vgic_v3;
+	};
+
+	struct vgic_irq private_irqs[VGIC_NR_PRIVATE_IRQS];
+
+	raw_spinlock_t ap_list_lock;	/* Protects the ap_list */
+
+	/*
+	 * List of IRQs that this VCPU should consider because they are either
+	 * Active or Pending (hence the name; AP list), or because they recently
+	 * were one of the two and need to be migrated off this list to another
+	 * VCPU.
+	 */
+	struct list_head ap_list_head;
+
+	/*
+	 * Members below are used with GICv3 emulation only and represent
+	 * parts of the redistributor.
+	 */
+	struct vgic_io_device	rd_iodev;
+	struct vgic_redist_region *rdreg;
+	u32 rdreg_index;
+	atomic_t syncr_busy;
+
+	/* Contains the attributes and gpa of the LPI pending tables. */
+	u64 pendbaser;
+	/* GICR_CTLR.{ENABLE_LPIS,RWP} */
+	atomic_t ctlr;
+
+	/* Cache guest priority bits */
+	u32 num_pri_bits;
+
+	/* Cache guest interrupt ID bits */
+	u32 num_id_bits;
+};
+
+extern struct static_key_false vgic_v2_cpuif_trap;
+extern struct static_key_false vgic_v3_cpuif_trap;
+
+int kvm_set_legacy_vgic_v2_addr(struct kvm *kvm, struct kvm_arm_device_addr *dev_addr);
+void kvm_vgic_early_init(struct kvm *kvm);
+int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu);
+int kvm_vgic_create(struct kvm *kvm, u32 type);
+void kvm_vgic_destroy(struct kvm *kvm);
+void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu);
+int kvm_vgic_map_resources(struct kvm *kvm);
+int kvm_vgic_hyp_init(void);
+void kvm_vgic_init_cpu_hardware(void);
+
+int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
+			bool level, void *owner);
+int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
+			  u32 vintid, struct irq_ops *ops);
+int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int vintid);
+bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int vintid);
+
+int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
+
+void kvm_vgic_load(struct kvm_vcpu *vcpu);
+void kvm_vgic_put(struct kvm_vcpu *vcpu);
+void kvm_vgic_vmcr_sync(struct kvm_vcpu *vcpu);
+
+#define irqchip_in_kernel(k)	(!!((k)->arch.vgic.in_kernel))
+#define vgic_initialized(k)	((k)->arch.vgic.initialized)
+#define vgic_ready(k)		((k)->arch.vgic.ready)
+#define vgic_valid_spi(k, i)	(((i) >= VGIC_NR_PRIVATE_IRQS) && \
+			((i) < (k)->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS))
+
+bool kvm_vcpu_has_pending_irqs(struct kvm_vcpu *vcpu);
+void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu);
+void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu);
+void kvm_vgic_reset_mapped_irq(struct kvm_vcpu *vcpu, u32 vintid);
+
+void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg, bool allow_group1);
+
+/**
+ * kvm_vgic_get_max_vcpus - Get the maximum number of VCPUs allowed by HW
+ *
+ * The host's GIC naturally limits the maximum amount of VCPUs a guest
+ * can use.
+ */
+static inline int kvm_vgic_get_max_vcpus(void)
+{
+	return kvm_vgic_global_state.max_gic_vcpus;
+}
+
+/**
+ * kvm_vgic_setup_default_irq_routing:
+ * Setup a default flat gsi routing table mapping all SPIs
+ */
+int kvm_vgic_setup_default_irq_routing(struct kvm *kvm);
+
+int kvm_vgic_set_owner(struct kvm_vcpu *vcpu, unsigned int intid, void *owner);
+
+struct kvm_kernel_irq_routing_entry;
+
+int kvm_vgic_v4_set_forwarding(struct kvm *kvm, int irq,
+			       struct kvm_kernel_irq_routing_entry *irq_entry);
+
+int kvm_vgic_v4_unset_forwarding(struct kvm *kvm, int irq,
+				 struct kvm_kernel_irq_routing_entry *irq_entry);
+
+int vgic_v4_load(struct kvm_vcpu *vcpu);
+void vgic_v4_commit(struct kvm_vcpu *vcpu);
+int vgic_v4_put(struct kvm_vcpu *vcpu);
+
+#endif /* __KVM_ARM_VGIC_H */