1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Copyright (C) 2019 Western Digital Corporation or its affiliates. 4 * 5 * Authors: 6 * Anup Patel <anup.patel@wdc.com> 7 */ 8 9 #ifndef __LINUX_KVM_RISCV_H 10 #define __LINUX_KVM_RISCV_H 11 12 #ifndef __ASSEMBLY__ 13 14 #include <linux/types.h> 15 #include <asm/ptrace.h> 16 17 #define __KVM_HAVE_READONLY_MEM 18 19 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 20 21 #define KVM_INTERRUPT_SET -1U 22 #define KVM_INTERRUPT_UNSET -2U 23 24 /* for KVM_GET_REGS and KVM_SET_REGS */ 25 struct kvm_regs { 26 }; 27 28 /* for KVM_GET_FPU and KVM_SET_FPU */ 29 struct kvm_fpu { 30 }; 31 32 /* KVM Debug exit structure */ 33 struct kvm_debug_exit_arch { 34 }; 35 36 /* for KVM_SET_GUEST_DEBUG */ 37 struct kvm_guest_debug_arch { 38 }; 39 40 /* definition of registers in kvm_run */ 41 struct kvm_sync_regs { 42 }; 43 44 /* for KVM_GET_SREGS and KVM_SET_SREGS */ 45 struct kvm_sregs { 46 }; 47 48 /* CONFIG registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */ 49 struct kvm_riscv_config { 50 unsigned long isa; 51 }; 52 53 /* CORE registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */ 54 struct kvm_riscv_core { 55 struct user_regs_struct regs; 56 unsigned long mode; 57 }; 58 59 /* Possible privilege modes for kvm_riscv_core */ 60 #define KVM_RISCV_MODE_S 1 61 #define KVM_RISCV_MODE_U 0 62 63 /* CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */ 64 struct kvm_riscv_csr { 65 unsigned long sstatus; 66 unsigned long sie; 67 unsigned long stvec; 68 unsigned long sscratch; 69 unsigned long sepc; 70 unsigned long scause; 71 unsigned long stval; 72 unsigned long sip; 73 unsigned long satp; 74 unsigned long scounteren; 75 }; 76 77 /* TIMER registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */ 78 struct kvm_riscv_timer { 79 __u64 frequency; 80 __u64 time; 81 __u64 compare; 82 __u64 state; 83 }; 84 85 /* 86 * ISA extension IDs specific to KVM. This is not the same as the host ISA 87 * extension IDs as that is internal to the host and should not be exposed 88 * to the guest. This should always be contiguous to keep the mapping simple 89 * in KVM implementation. 90 */ 91 enum KVM_RISCV_ISA_EXT_ID { 92 KVM_RISCV_ISA_EXT_A = 0, 93 KVM_RISCV_ISA_EXT_C, 94 KVM_RISCV_ISA_EXT_D, 95 KVM_RISCV_ISA_EXT_F, 96 KVM_RISCV_ISA_EXT_H, 97 KVM_RISCV_ISA_EXT_I, 98 KVM_RISCV_ISA_EXT_M, 99 KVM_RISCV_ISA_EXT_MAX, 100 }; 101 102 /* Possible states for kvm_riscv_timer */ 103 #define KVM_RISCV_TIMER_STATE_OFF 0 104 #define KVM_RISCV_TIMER_STATE_ON 1 105 106 #define KVM_REG_SIZE(id) \ 107 (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT)) 108 109 /* If you need to interpret the index values, here is the key: */ 110 #define KVM_REG_RISCV_TYPE_MASK 0x00000000FF000000 111 #define KVM_REG_RISCV_TYPE_SHIFT 24 112 113 /* Config registers are mapped as type 1 */ 114 #define KVM_REG_RISCV_CONFIG (0x01 << KVM_REG_RISCV_TYPE_SHIFT) 115 #define KVM_REG_RISCV_CONFIG_REG(name) \ 116 (offsetof(struct kvm_riscv_config, name) / sizeof(unsigned long)) 117 118 /* Core registers are mapped as type 2 */ 119 #define KVM_REG_RISCV_CORE (0x02 << KVM_REG_RISCV_TYPE_SHIFT) 120 #define KVM_REG_RISCV_CORE_REG(name) \ 121 (offsetof(struct kvm_riscv_core, name) / sizeof(unsigned long)) 122 123 /* Control and status registers are mapped as type 3 */ 124 #define KVM_REG_RISCV_CSR (0x03 << KVM_REG_RISCV_TYPE_SHIFT) 125 #define KVM_REG_RISCV_CSR_REG(name) \ 126 (offsetof(struct kvm_riscv_csr, name) / sizeof(unsigned long)) 127 128 /* Timer registers are mapped as type 4 */ 129 #define KVM_REG_RISCV_TIMER (0x04 << KVM_REG_RISCV_TYPE_SHIFT) 130 #define KVM_REG_RISCV_TIMER_REG(name) \ 131 (offsetof(struct kvm_riscv_timer, name) / sizeof(__u64)) 132 133 /* F extension registers are mapped as type 5 */ 134 #define KVM_REG_RISCV_FP_F (0x05 << KVM_REG_RISCV_TYPE_SHIFT) 135 #define KVM_REG_RISCV_FP_F_REG(name) \ 136 (offsetof(struct __riscv_f_ext_state, name) / sizeof(__u32)) 137 138 /* D extension registers are mapped as type 6 */ 139 #define KVM_REG_RISCV_FP_D (0x06 << KVM_REG_RISCV_TYPE_SHIFT) 140 #define KVM_REG_RISCV_FP_D_REG(name) \ 141 (offsetof(struct __riscv_d_ext_state, name) / sizeof(__u64)) 142 143 /* ISA Extension registers are mapped as type 7 */ 144 #define KVM_REG_RISCV_ISA_EXT (0x07 << KVM_REG_RISCV_TYPE_SHIFT) 145 146 #endif 147 148 #endif /* __LINUX_KVM_RISCV_H */ 149