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-rw-r--r--arch/arm64/kvm/vgic/vgic.h346
1 files changed, 346 insertions, 0 deletions
diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h
new file mode 100644
index 0000000000..8d134569d0
--- /dev/null
+++ b/arch/arm64/kvm/vgic/vgic.h
@@ -0,0 +1,346 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015, 2016 ARM Ltd.
+ */
+#ifndef __KVM_ARM_VGIC_NEW_H__
+#define __KVM_ARM_VGIC_NEW_H__
+
+#include <linux/irqchip/arm-gic-common.h>
+#include <asm/kvm_mmu.h>
+
+#define PRODUCT_ID_KVM 0x4b /* ASCII code K */
+#define IMPLEMENTER_ARM 0x43b
+
+#define VGIC_ADDR_UNDEF (-1)
+#define IS_VGIC_ADDR_UNDEF(_x) ((_x) == VGIC_ADDR_UNDEF)
+
+#define INTERRUPT_ID_BITS_SPIS 10
+#define INTERRUPT_ID_BITS_ITS 16
+#define VGIC_PRI_BITS 5
+
+#define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)
+
+#define VGIC_AFFINITY_0_SHIFT 0
+#define VGIC_AFFINITY_0_MASK (0xffUL << VGIC_AFFINITY_0_SHIFT)
+#define VGIC_AFFINITY_1_SHIFT 8
+#define VGIC_AFFINITY_1_MASK (0xffUL << VGIC_AFFINITY_1_SHIFT)
+#define VGIC_AFFINITY_2_SHIFT 16
+#define VGIC_AFFINITY_2_MASK (0xffUL << VGIC_AFFINITY_2_SHIFT)
+#define VGIC_AFFINITY_3_SHIFT 24
+#define VGIC_AFFINITY_3_MASK (0xffUL << VGIC_AFFINITY_3_SHIFT)
+
+#define VGIC_AFFINITY_LEVEL(reg, level) \
+ ((((reg) & VGIC_AFFINITY_## level ##_MASK) \
+ >> VGIC_AFFINITY_## level ##_SHIFT) << MPIDR_LEVEL_SHIFT(level))
+
+/*
+ * The Userspace encodes the affinity differently from the MPIDR,
+ * Below macro converts vgic userspace format to MPIDR reg format.
+ */
+#define VGIC_TO_MPIDR(val) (VGIC_AFFINITY_LEVEL(val, 0) | \
+ VGIC_AFFINITY_LEVEL(val, 1) | \
+ VGIC_AFFINITY_LEVEL(val, 2) | \
+ VGIC_AFFINITY_LEVEL(val, 3))
+
+/*
+ * As per Documentation/virt/kvm/devices/arm-vgic-v3.rst,
+ * below macros are defined for CPUREG encoding.
+ */
+#define KVM_REG_ARM_VGIC_SYSREG_OP0_MASK 0x000000000000c000
+#define KVM_REG_ARM_VGIC_SYSREG_OP0_SHIFT 14
+#define KVM_REG_ARM_VGIC_SYSREG_OP1_MASK 0x0000000000003800
+#define KVM_REG_ARM_VGIC_SYSREG_OP1_SHIFT 11
+#define KVM_REG_ARM_VGIC_SYSREG_CRN_MASK 0x0000000000000780
+#define KVM_REG_ARM_VGIC_SYSREG_CRN_SHIFT 7
+#define KVM_REG_ARM_VGIC_SYSREG_CRM_MASK 0x0000000000000078
+#define KVM_REG_ARM_VGIC_SYSREG_CRM_SHIFT 3
+#define KVM_REG_ARM_VGIC_SYSREG_OP2_MASK 0x0000000000000007
+#define KVM_REG_ARM_VGIC_SYSREG_OP2_SHIFT 0
+
+#define KVM_DEV_ARM_VGIC_SYSREG_MASK (KVM_REG_ARM_VGIC_SYSREG_OP0_MASK | \
+ KVM_REG_ARM_VGIC_SYSREG_OP1_MASK | \
+ KVM_REG_ARM_VGIC_SYSREG_CRN_MASK | \
+ KVM_REG_ARM_VGIC_SYSREG_CRM_MASK | \
+ KVM_REG_ARM_VGIC_SYSREG_OP2_MASK)
+
+/*
+ * As per Documentation/virt/kvm/devices/arm-vgic-its.rst,
+ * below macros are defined for ITS table entry encoding.
+ */
+#define KVM_ITS_CTE_VALID_SHIFT 63
+#define KVM_ITS_CTE_VALID_MASK BIT_ULL(63)
+#define KVM_ITS_CTE_RDBASE_SHIFT 16
+#define KVM_ITS_CTE_ICID_MASK GENMASK_ULL(15, 0)
+#define KVM_ITS_ITE_NEXT_SHIFT 48
+#define KVM_ITS_ITE_PINTID_SHIFT 16
+#define KVM_ITS_ITE_PINTID_MASK GENMASK_ULL(47, 16)
+#define KVM_ITS_ITE_ICID_MASK GENMASK_ULL(15, 0)
+#define KVM_ITS_DTE_VALID_SHIFT 63
+#define KVM_ITS_DTE_VALID_MASK BIT_ULL(63)
+#define KVM_ITS_DTE_NEXT_SHIFT 49
+#define KVM_ITS_DTE_NEXT_MASK GENMASK_ULL(62, 49)
+#define KVM_ITS_DTE_ITTADDR_SHIFT 5
+#define KVM_ITS_DTE_ITTADDR_MASK GENMASK_ULL(48, 5)
+#define KVM_ITS_DTE_SIZE_MASK GENMASK_ULL(4, 0)
+#define KVM_ITS_L1E_VALID_MASK BIT_ULL(63)
+/* we only support 64 kB translation table page size */
+#define KVM_ITS_L1E_ADDR_MASK GENMASK_ULL(51, 16)
+
+#define KVM_VGIC_V3_RDIST_INDEX_MASK GENMASK_ULL(11, 0)
+#define KVM_VGIC_V3_RDIST_FLAGS_MASK GENMASK_ULL(15, 12)
+#define KVM_VGIC_V3_RDIST_FLAGS_SHIFT 12
+#define KVM_VGIC_V3_RDIST_BASE_MASK GENMASK_ULL(51, 16)
+#define KVM_VGIC_V3_RDIST_COUNT_MASK GENMASK_ULL(63, 52)
+#define KVM_VGIC_V3_RDIST_COUNT_SHIFT 52
+
+#ifdef CONFIG_DEBUG_SPINLOCK
+#define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p)
+#else
+#define DEBUG_SPINLOCK_BUG_ON(p)
+#endif
+
+static inline u32 vgic_get_implementation_rev(struct kvm_vcpu *vcpu)
+{
+ return vcpu->kvm->arch.vgic.implementation_rev;
+}
+
+/* Requires the irq_lock to be held by the caller. */
+static inline bool irq_is_pending(struct vgic_irq *irq)
+{
+ if (irq->config == VGIC_CONFIG_EDGE)
+ return irq->pending_latch;
+ else
+ return irq->pending_latch || irq->line_level;
+}
+
+static inline bool vgic_irq_is_mapped_level(struct vgic_irq *irq)
+{
+ return irq->config == VGIC_CONFIG_LEVEL && irq->hw;
+}
+
+static inline int vgic_irq_get_lr_count(struct vgic_irq *irq)
+{
+ /* Account for the active state as an interrupt */
+ if (vgic_irq_is_sgi(irq->intid) && irq->source)
+ return hweight8(irq->source) + irq->active;
+
+ return irq_is_pending(irq) || irq->active;
+}
+
+static inline bool vgic_irq_is_multi_sgi(struct vgic_irq *irq)
+{
+ return vgic_irq_get_lr_count(irq) > 1;
+}
+
+static inline int vgic_write_guest_lock(struct kvm *kvm, gpa_t gpa,
+ const void *data, unsigned long len)
+{
+ struct vgic_dist *dist = &kvm->arch.vgic;
+ int ret;
+
+ dist->table_write_in_progress = true;
+ ret = kvm_write_guest_lock(kvm, gpa, data, len);
+ dist->table_write_in_progress = false;
+
+ return ret;
+}
+
+/*
+ * This struct provides an intermediate representation of the fields contained
+ * in the GICH_VMCR and ICH_VMCR registers, such that code exporting the GIC
+ * state to userspace can generate either GICv2 or GICv3 CPU interface
+ * registers regardless of the hardware backed GIC used.
+ */
+struct vgic_vmcr {
+ u32 grpen0;
+ u32 grpen1;
+
+ u32 ackctl;
+ u32 fiqen;
+ u32 cbpr;
+ u32 eoim;
+
+ u32 abpr;
+ u32 bpr;
+ u32 pmr; /* Priority mask field in the GICC_PMR and
+ * ICC_PMR_EL1 priority field format */
+};
+
+struct vgic_reg_attr {
+ struct kvm_vcpu *vcpu;
+ gpa_t addr;
+};
+
+int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
+ struct vgic_reg_attr *reg_attr);
+int vgic_v2_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
+ struct vgic_reg_attr *reg_attr);
+const struct vgic_register_region *
+vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
+ gpa_t addr, int len);
+struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
+ u32 intid);
+void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic_irq *irq);
+void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
+bool vgic_get_phys_line_level(struct vgic_irq *irq);
+void vgic_irq_set_phys_pending(struct vgic_irq *irq, bool pending);
+void vgic_irq_set_phys_active(struct vgic_irq *irq, bool active);
+bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq,
+ unsigned long flags);
+void vgic_kick_vcpus(struct kvm *kvm);
+void vgic_irq_handle_resampling(struct vgic_irq *irq,
+ bool lr_deactivated, bool lr_pending);
+
+int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr,
+ phys_addr_t addr, phys_addr_t alignment,
+ phys_addr_t size);
+
+void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
+void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
+void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
+void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
+int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
+int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
+ int offset, u32 *val);
+int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
+ int offset, u32 *val);
+void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
+void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
+void vgic_v2_enable(struct kvm_vcpu *vcpu);
+int vgic_v2_probe(const struct gic_kvm_info *info);
+int vgic_v2_map_resources(struct kvm *kvm);
+int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
+ enum vgic_type);
+
+void vgic_v2_init_lrs(void);
+void vgic_v2_load(struct kvm_vcpu *vcpu);
+void vgic_v2_put(struct kvm_vcpu *vcpu);
+void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu);
+
+void vgic_v2_save_state(struct kvm_vcpu *vcpu);
+void vgic_v2_restore_state(struct kvm_vcpu *vcpu);
+
+static inline void vgic_get_irq_kref(struct vgic_irq *irq)
+{
+ if (irq->intid < VGIC_MIN_LPI)
+ return;
+
+ kref_get(&irq->refcount);
+}
+
+void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
+void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
+void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
+void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
+void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
+void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
+void vgic_v3_enable(struct kvm_vcpu *vcpu);
+int vgic_v3_probe(const struct gic_kvm_info *info);
+int vgic_v3_map_resources(struct kvm *kvm);
+int vgic_v3_lpi_sync_pending_status(struct kvm *kvm, struct vgic_irq *irq);
+int vgic_v3_save_pending_tables(struct kvm *kvm);
+int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count);
+int vgic_register_redist_iodev(struct kvm_vcpu *vcpu);
+void vgic_unregister_redist_iodev(struct kvm_vcpu *vcpu);
+bool vgic_v3_check_base(struct kvm *kvm);
+
+void vgic_v3_load(struct kvm_vcpu *vcpu);
+void vgic_v3_put(struct kvm_vcpu *vcpu);
+void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu);
+
+bool vgic_has_its(struct kvm *kvm);
+int kvm_vgic_register_its_device(void);
+void vgic_enable_lpis(struct kvm_vcpu *vcpu);
+void vgic_flush_pending_lpis(struct kvm_vcpu *vcpu);
+int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
+int vgic_v3_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
+int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
+ int offset, u32 *val);
+int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
+ int offset, u32 *val);
+int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu,
+ struct kvm_device_attr *attr, bool is_write);
+int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
+int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write,
+ u32 intid, u32 *val);
+int kvm_register_vgic_device(unsigned long type);
+void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
+void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
+int vgic_lazy_init(struct kvm *kvm);
+int vgic_init(struct kvm *kvm);
+
+void vgic_debug_init(struct kvm *kvm);
+void vgic_debug_destroy(struct kvm *kvm);
+
+static inline int vgic_v3_max_apr_idx(struct kvm_vcpu *vcpu)
+{
+ struct vgic_cpu *cpu_if = &vcpu->arch.vgic_cpu;
+
+ /*
+ * num_pri_bits are initialized with HW supported values.
+ * We can rely safely on num_pri_bits even if VM has not
+ * restored ICC_CTLR_EL1 before restoring APnR registers.
+ */
+ switch (cpu_if->num_pri_bits) {
+ case 7: return 3;
+ case 6: return 1;
+ default: return 0;
+ }
+}
+
+static inline bool
+vgic_v3_redist_region_full(struct vgic_redist_region *region)
+{
+ if (!region->count)
+ return false;
+
+ return (region->free_index >= region->count);
+}
+
+struct vgic_redist_region *vgic_v3_rdist_free_slot(struct list_head *rdregs);
+
+static inline size_t
+vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg)
+{
+ if (!rdreg->count)
+ return atomic_read(&kvm->online_vcpus) * KVM_VGIC_V3_REDIST_SIZE;
+ else
+ return rdreg->count * KVM_VGIC_V3_REDIST_SIZE;
+}
+
+struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
+ u32 index);
+void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg);
+
+bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);
+
+static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size)
+{
+ struct vgic_dist *d = &kvm->arch.vgic;
+
+ return (base + size > d->vgic_dist_base) &&
+ (base < d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE);
+}
+
+bool vgic_lpis_enabled(struct kvm_vcpu *vcpu);
+int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr);
+int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
+ u32 devid, u32 eventid, struct vgic_irq **irq);
+struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
+int vgic_its_inject_cached_translation(struct kvm *kvm, struct kvm_msi *msi);
+void vgic_lpi_translation_cache_init(struct kvm *kvm);
+void vgic_lpi_translation_cache_destroy(struct kvm *kvm);
+void vgic_its_invalidate_cache(struct kvm *kvm);
+
+/* GICv4.1 MMIO interface */
+int vgic_its_inv_lpi(struct kvm *kvm, struct vgic_irq *irq);
+int vgic_its_invall(struct kvm_vcpu *vcpu);
+
+bool vgic_supports_direct_msis(struct kvm *kvm);
+int vgic_v4_init(struct kvm *kvm);
+void vgic_v4_teardown(struct kvm *kvm);
+void vgic_v4_configure_vsgis(struct kvm *kvm);
+void vgic_v4_get_vlpi_state(struct vgic_irq *irq, bool *val);
+int vgic_v4_request_vpe_irq(struct kvm_vcpu *vcpu, int irq);
+
+#endif