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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright (C) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __LINUX_KVM_RISCV_H
#define __LINUX_KVM_RISCV_H
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <asm/bitsperlong.h>
#include <asm/ptrace.h>
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#define KVM_INTERRUPT_SET -1U
#define KVM_INTERRUPT_UNSET -2U
/* for KVM_GET_REGS and KVM_SET_REGS */
struct kvm_regs {
};
/* for KVM_GET_FPU and KVM_SET_FPU */
struct kvm_fpu {
};
/* KVM Debug exit structure */
struct kvm_debug_exit_arch {
};
/* for KVM_SET_GUEST_DEBUG */
struct kvm_guest_debug_arch {
};
/* definition of registers in kvm_run */
struct kvm_sync_regs {
};
/* for KVM_GET_SREGS and KVM_SET_SREGS */
struct kvm_sregs {
};
/* CONFIG registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_config {
unsigned long isa;
unsigned long zicbom_block_size;
unsigned long mvendorid;
unsigned long marchid;
unsigned long mimpid;
unsigned long zicboz_block_size;
};
/* CORE registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_core {
struct user_regs_struct regs;
unsigned long mode;
};
/* Possible privilege modes for kvm_riscv_core */
#define KVM_RISCV_MODE_S 1
#define KVM_RISCV_MODE_U 0
/* General CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_csr {
unsigned long sstatus;
unsigned long sie;
unsigned long stvec;
unsigned long sscratch;
unsigned long sepc;
unsigned long scause;
unsigned long stval;
unsigned long sip;
unsigned long satp;
unsigned long scounteren;
};
/* AIA CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_aia_csr {
unsigned long siselect;
unsigned long iprio1;
unsigned long iprio2;
unsigned long sieh;
unsigned long siph;
unsigned long iprio1h;
unsigned long iprio2h;
};
/* TIMER registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
struct kvm_riscv_timer {
__u64 frequency;
__u64 time;
__u64 compare;
__u64 state;
};
/*
* ISA extension IDs specific to KVM. This is not the same as the host ISA
* extension IDs as that is internal to the host and should not be exposed
* to the guest. This should always be contiguous to keep the mapping simple
* in KVM implementation.
*/
enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_A = 0,
KVM_RISCV_ISA_EXT_C,
KVM_RISCV_ISA_EXT_D,
KVM_RISCV_ISA_EXT_F,
KVM_RISCV_ISA_EXT_H,
KVM_RISCV_ISA_EXT_I,
KVM_RISCV_ISA_EXT_M,
KVM_RISCV_ISA_EXT_SVPBMT,
KVM_RISCV_ISA_EXT_SSTC,
KVM_RISCV_ISA_EXT_SVINVAL,
KVM_RISCV_ISA_EXT_ZIHINTPAUSE,
KVM_RISCV_ISA_EXT_ZICBOM,
KVM_RISCV_ISA_EXT_ZICBOZ,
KVM_RISCV_ISA_EXT_ZBB,
KVM_RISCV_ISA_EXT_SSAIA,
KVM_RISCV_ISA_EXT_V,
KVM_RISCV_ISA_EXT_SVNAPOT,
KVM_RISCV_ISA_EXT_MAX,
};
/*
* SBI extension IDs specific to KVM. This is not the same as the SBI
* extension IDs defined by the RISC-V SBI specification.
*/
enum KVM_RISCV_SBI_EXT_ID {
KVM_RISCV_SBI_EXT_V01 = 0,
KVM_RISCV_SBI_EXT_TIME,
KVM_RISCV_SBI_EXT_IPI,
KVM_RISCV_SBI_EXT_RFENCE,
KVM_RISCV_SBI_EXT_SRST,
KVM_RISCV_SBI_EXT_HSM,
KVM_RISCV_SBI_EXT_PMU,
KVM_RISCV_SBI_EXT_EXPERIMENTAL,
KVM_RISCV_SBI_EXT_VENDOR,
KVM_RISCV_SBI_EXT_MAX,
};
/* Possible states for kvm_riscv_timer */
#define KVM_RISCV_TIMER_STATE_OFF 0
#define KVM_RISCV_TIMER_STATE_ON 1
#define KVM_REG_SIZE(id) \
(1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_RISCV_TYPE_MASK 0x00000000FF000000
#define KVM_REG_RISCV_TYPE_SHIFT 24
#define KVM_REG_RISCV_SUBTYPE_MASK 0x0000000000FF0000
#define KVM_REG_RISCV_SUBTYPE_SHIFT 16
/* Config registers are mapped as type 1 */
#define KVM_REG_RISCV_CONFIG (0x01 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_CONFIG_REG(name) \
(offsetof(struct kvm_riscv_config, name) / sizeof(unsigned long))
/* Core registers are mapped as type 2 */
#define KVM_REG_RISCV_CORE (0x02 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_CORE_REG(name) \
(offsetof(struct kvm_riscv_core, name) / sizeof(unsigned long))
/* Control and status registers are mapped as type 3 */
#define KVM_REG_RISCV_CSR (0x03 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_CSR_GENERAL (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_CSR_AIA (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_CSR_REG(name) \
(offsetof(struct kvm_riscv_csr, name) / sizeof(unsigned long))
#define KVM_REG_RISCV_CSR_AIA_REG(name) \
(offsetof(struct kvm_riscv_aia_csr, name) / sizeof(unsigned long))
/* Timer registers are mapped as type 4 */
#define KVM_REG_RISCV_TIMER (0x04 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_TIMER_REG(name) \
(offsetof(struct kvm_riscv_timer, name) / sizeof(__u64))
/* F extension registers are mapped as type 5 */
#define KVM_REG_RISCV_FP_F (0x05 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_FP_F_REG(name) \
(offsetof(struct __riscv_f_ext_state, name) / sizeof(__u32))
/* D extension registers are mapped as type 6 */
#define KVM_REG_RISCV_FP_D (0x06 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_FP_D_REG(name) \
(offsetof(struct __riscv_d_ext_state, name) / sizeof(__u64))
/* ISA Extension registers are mapped as type 7 */
#define KVM_REG_RISCV_ISA_EXT (0x07 << KVM_REG_RISCV_TYPE_SHIFT)
/* SBI extension registers are mapped as type 8 */
#define KVM_REG_RISCV_SBI_EXT (0x08 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_SBI_SINGLE (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_SBI_MULTI_EN (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_SBI_MULTI_DIS (0x2 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_SBI_MULTI_REG(__ext_id) \
((__ext_id) / __BITS_PER_LONG)
#define KVM_REG_RISCV_SBI_MULTI_MASK(__ext_id) \
(1UL << ((__ext_id) % __BITS_PER_LONG))
#define KVM_REG_RISCV_SBI_MULTI_REG_LAST \
KVM_REG_RISCV_SBI_MULTI_REG(KVM_RISCV_SBI_EXT_MAX - 1)
/* V extension registers are mapped as type 9 */
#define KVM_REG_RISCV_VECTOR (0x09 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_VECTOR_CSR_REG(name) \
(offsetof(struct __riscv_v_ext_state, name) / sizeof(unsigned long))
#define KVM_REG_RISCV_VECTOR_REG(n) \
((n) + sizeof(struct __riscv_v_ext_state) / sizeof(unsigned long))
/* Device Control API: RISC-V AIA */
#define KVM_DEV_RISCV_APLIC_ALIGN 0x1000
#define KVM_DEV_RISCV_APLIC_SIZE 0x4000
#define KVM_DEV_RISCV_APLIC_MAX_HARTS 0x4000
#define KVM_DEV_RISCV_IMSIC_ALIGN 0x1000
#define KVM_DEV_RISCV_IMSIC_SIZE 0x1000
#define KVM_DEV_RISCV_AIA_GRP_CONFIG 0
#define KVM_DEV_RISCV_AIA_CONFIG_MODE 0
#define KVM_DEV_RISCV_AIA_CONFIG_IDS 1
#define KVM_DEV_RISCV_AIA_CONFIG_SRCS 2
#define KVM_DEV_RISCV_AIA_CONFIG_GROUP_BITS 3
#define KVM_DEV_RISCV_AIA_CONFIG_GROUP_SHIFT 4
#define KVM_DEV_RISCV_AIA_CONFIG_HART_BITS 5
#define KVM_DEV_RISCV_AIA_CONFIG_GUEST_BITS 6
/*
* Modes of RISC-V AIA device:
* 1) EMUL (aka Emulation): Trap-n-emulate IMSIC
* 2) HWACCEL (aka HW Acceleration): Virtualize IMSIC using IMSIC guest files
* 3) AUTO (aka Automatic): Virtualize IMSIC using IMSIC guest files whenever
* available otherwise fallback to trap-n-emulation
*/
#define KVM_DEV_RISCV_AIA_MODE_EMUL 0
#define KVM_DEV_RISCV_AIA_MODE_HWACCEL 1
#define KVM_DEV_RISCV_AIA_MODE_AUTO 2
#define KVM_DEV_RISCV_AIA_IDS_MIN 63
#define KVM_DEV_RISCV_AIA_IDS_MAX 2048
#define KVM_DEV_RISCV_AIA_SRCS_MAX 1024
#define KVM_DEV_RISCV_AIA_GROUP_BITS_MAX 8
#define KVM_DEV_RISCV_AIA_GROUP_SHIFT_MIN 24
#define KVM_DEV_RISCV_AIA_GROUP_SHIFT_MAX 56
#define KVM_DEV_RISCV_AIA_HART_BITS_MAX 16
#define KVM_DEV_RISCV_AIA_GUEST_BITS_MAX 8
#define KVM_DEV_RISCV_AIA_GRP_ADDR 1
#define KVM_DEV_RISCV_AIA_ADDR_APLIC 0
#define KVM_DEV_RISCV_AIA_ADDR_IMSIC(__vcpu) (1 + (__vcpu))
#define KVM_DEV_RISCV_AIA_ADDR_MAX \
(1 + KVM_DEV_RISCV_APLIC_MAX_HARTS)
#define KVM_DEV_RISCV_AIA_GRP_CTRL 2
#define KVM_DEV_RISCV_AIA_CTRL_INIT 0
/*
* The device attribute type contains the memory mapped offset of the
* APLIC register (range 0x0000-0x3FFF) and it must be 4-byte aligned.
*/
#define KVM_DEV_RISCV_AIA_GRP_APLIC 3
/*
* The lower 12-bits of the device attribute type contains the iselect
* value of the IMSIC register (range 0x70-0xFF) whereas the higher order
* bits contains the VCPU id.
*/
#define KVM_DEV_RISCV_AIA_GRP_IMSIC 4
#define KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS 12
#define KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK \
((1U << KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS) - 1)
#define KVM_DEV_RISCV_AIA_IMSIC_MKATTR(__vcpu, __isel) \
(((__vcpu) << KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS) | \
((__isel) & KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK))
#define KVM_DEV_RISCV_AIA_IMSIC_GET_ISEL(__attr) \
((__attr) & KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK)
#define KVM_DEV_RISCV_AIA_IMSIC_GET_VCPU(__attr) \
((__attr) >> KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS)
/* One single KVM irqchip, ie. the AIA */
#define KVM_NR_IRQCHIPS 1
#endif
#endif /* __LINUX_KVM_RISCV_H */
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