1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /** 3 * Copyright (c) 2021 Western Digital Corporation or its affiliates. 4 * 5 * Authors: 6 * Atish Patra <atish.patra@wdc.com> 7 */ 8 9 #ifndef __RISCV_KVM_VCPU_SBI_H__ 10 #define __RISCV_KVM_VCPU_SBI_H__ 11 12 #define KVM_SBI_IMPID 3 13 14 #define KVM_SBI_VERSION_MAJOR 2 15 #define KVM_SBI_VERSION_MINOR 0 16 17 enum kvm_riscv_sbi_ext_status { 18 KVM_RISCV_SBI_EXT_STATUS_UNINITIALIZED, 19 KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE, 20 KVM_RISCV_SBI_EXT_STATUS_ENABLED, 21 KVM_RISCV_SBI_EXT_STATUS_DISABLED, 22 }; 23 24 struct kvm_vcpu_sbi_context { 25 int return_handled; 26 enum kvm_riscv_sbi_ext_status ext_status[KVM_RISCV_SBI_EXT_MAX]; 27 }; 28 29 struct kvm_vcpu_sbi_return { 30 unsigned long out_val; 31 unsigned long err_val; 32 struct kvm_cpu_trap *utrap; 33 bool uexit; 34 }; 35 36 struct kvm_vcpu_sbi_extension { 37 unsigned long extid_start; 38 unsigned long extid_end; 39 40 bool default_disabled; 41 42 /** 43 * SBI extension handler. It can be defined for a given extension or group of 44 * extension. But it should always return linux error codes rather than SBI 45 * specific error codes. 46 */ 47 int (*handler)(struct kvm_vcpu *vcpu, struct kvm_run *run, 48 struct kvm_vcpu_sbi_return *retdata); 49 50 /* Extension specific probe function */ 51 unsigned long (*probe)(struct kvm_vcpu *vcpu); 52 53 /* 54 * Init/deinit function called once during VCPU init/destroy. These 55 * might be use if the SBI extensions need to allocate or do specific 56 * init time only configuration. 57 */ 58 int (*init)(struct kvm_vcpu *vcpu); 59 void (*deinit)(struct kvm_vcpu *vcpu); 60 61 void (*reset)(struct kvm_vcpu *vcpu); 62 }; 63 64 void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run); 65 void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu, 66 struct kvm_run *run, 67 u32 type, u64 flags); 68 void kvm_riscv_vcpu_sbi_request_reset(struct kvm_vcpu *vcpu, 69 unsigned long pc, unsigned long a1); 70 void kvm_riscv_vcpu_sbi_load_reset_state(struct kvm_vcpu *vcpu); 71 int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run); 72 int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu, 73 const struct kvm_one_reg *reg); 74 int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu, 75 const struct kvm_one_reg *reg); 76 int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu, 77 const struct kvm_one_reg *reg); 78 int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu, 79 const struct kvm_one_reg *reg); 80 const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext( 81 struct kvm_vcpu *vcpu, unsigned long extid); 82 bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx); 83 int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run); 84 void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu); 85 void kvm_riscv_vcpu_sbi_deinit(struct kvm_vcpu *vcpu); 86 void kvm_riscv_vcpu_sbi_reset(struct kvm_vcpu *vcpu); 87 88 int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num, 89 unsigned long *reg_val); 90 int kvm_riscv_vcpu_set_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num, 91 unsigned long reg_val); 92 93 #ifdef CONFIG_RISCV_SBI_V01 94 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01; 95 #endif 96 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base; 97 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time; 98 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi; 99 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence; 100 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst; 101 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm; 102 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn; 103 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_susp; 104 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta; 105 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental; 106 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor; 107 108 #ifdef CONFIG_RISCV_PMU_SBI 109 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu; 110 #endif 111 #endif /* __RISCV_KVM_VCPU_SBI_H__ */ 112