/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2015, 2016 ARM Ltd. */ #ifndef __KVM_ARM_VGIC_MMIO_H__ #define __KVM_ARM_VGIC_MMIO_H__ struct vgic_register_region { unsigned int reg_offset; unsigned int len; unsigned int bits_per_irq; unsigned int access_flags; union { unsigned long (*read)(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); unsigned long (*its_read)(struct kvm *kvm, struct vgic_its *its, gpa_t addr, unsigned int len); }; union { void (*write)(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); void (*its_write)(struct kvm *kvm, struct vgic_its *its, gpa_t addr, unsigned int len, unsigned long val); }; unsigned long (*uaccess_read)(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); union { int (*uaccess_write)(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int (*uaccess_its_write)(struct kvm *kvm, struct vgic_its *its, gpa_t addr, unsigned int len, unsigned long val); }; }; extern struct kvm_io_device_ops kvm_io_gic_ops; #define VGIC_ACCESS_8bit 1 #define VGIC_ACCESS_32bit 2 #define VGIC_ACCESS_64bit 4 /* * Generate a mask that covers the number of bytes required to address * up to 1024 interrupts, each represented by bits. This assumes * that is a power of two. */ #define VGIC_ADDR_IRQ_MASK(bits) (((bits) * 1024 / 8) - 1) /* * (addr & mask) gives us the _byte_ offset for the INT ID. * We multiply this by 8 the get the _bit_ offset, then divide this by * the number of bits to learn the actual INT ID. * But instead of a division (which requires a "long long div" implementation), * we shift by the binary logarithm of . * This assumes that is a power of two. */ #define VGIC_ADDR_TO_INTID(addr, bits) (((addr) & VGIC_ADDR_IRQ_MASK(bits)) * \ 8 >> ilog2(bits)) /* * Some VGIC registers store per-IRQ information, with a different number * of bits per IRQ. For those registers this macro is used. * The _WITH_LENGTH version instantiates registers with a fixed length * and is mutually exclusive with the _PER_IRQ version. */ #define REGISTER_DESC_WITH_BITS_PER_IRQ(off, rd, wr, ur, uw, bpi, acc) \ { \ .reg_offset = off, \ .bits_per_irq = bpi, \ .len = bpi * 1024 / 8, \ .access_flags = acc, \ .read = rd, \ .write = wr, \ .uaccess_read = ur, \ .uaccess_write = uw, \ } #define REGISTER_DESC_WITH_LENGTH(off, rd, wr, length, acc) \ { \ .reg_offset = off, \ .bits_per_irq = 0, \ .len = length, \ .access_flags = acc, \ .read = rd, \ .write = wr, \ } #define REGISTER_DESC_WITH_LENGTH_UACCESS(off, rd, wr, urd, uwr, length, acc) \ { \ .reg_offset = off, \ .bits_per_irq = 0, \ .len = length, \ .access_flags = acc, \ .read = rd, \ .write = wr, \ .uaccess_read = urd, \ .uaccess_write = uwr, \ } unsigned long vgic_data_mmio_bus_to_host(const void *val, unsigned int len); void vgic_data_host_to_mmio_bus(void *buf, unsigned int len, unsigned long data); unsigned long extract_bytes(u64 data, unsigned int offset, unsigned int num); u64 update_64bit_reg(u64 reg, unsigned int offset, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_raz(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); unsigned long vgic_mmio_read_rao(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_wi(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_mmio_uaccess_write_wi(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_group(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_group(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_enable(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_senable(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); void vgic_mmio_write_cenable(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_uaccess_write_senable(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_uaccess_write_cenable(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_pending(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_spending(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); void vgic_mmio_write_cpending(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_uaccess_write_spending(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_uaccess_write_cpending(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_active(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); unsigned long vgic_uaccess_read_active(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_cactive(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); void vgic_mmio_write_sactive(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_mmio_uaccess_write_cactive(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_mmio_uaccess_write_sactive(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_priority(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_priority(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); unsigned long vgic_mmio_read_config(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len); void vgic_mmio_write_config(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); int vgic_uaccess(struct kvm_vcpu *vcpu, struct vgic_io_device *dev, bool is_write, int offset, u32 *val); u64 vgic_read_irq_line_level_info(struct kvm_vcpu *vcpu, u32 intid); void vgic_write_irq_line_level_info(struct kvm_vcpu *vcpu, u32 intid, const u64 val); unsigned int vgic_v2_init_dist_iodev(struct vgic_io_device *dev); unsigned int vgic_v3_init_dist_iodev(struct vgic_io_device *dev); u64 vgic_sanitise_outer_cacheability(u64 reg); u64 vgic_sanitise_inner_cacheability(u64 reg); u64 vgic_sanitise_shareability(u64 reg); u64 vgic_sanitise_field(u64 reg, u64 field_mask, int field_shift, u64 (*sanitise_fn)(u64)); /* Find the proper register handler entry given a certain address offset */ const struct vgic_register_region * vgic_find_mmio_region(const struct vgic_register_region *regions, int nr_regions, unsigned int offset); #endif