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 void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run); 55 void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu, 56 struct kvm_run *run, 57 u32 type, u64 flags); 58 int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run); 59 int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu, 60 const struct kvm_one_reg *reg); 61 int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu, 62 const struct kvm_one_reg *reg); 63 int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu, 64 const struct kvm_one_reg *reg); 65 int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu, 66 const struct kvm_one_reg *reg); 67 const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext( 68 struct kvm_vcpu *vcpu, unsigned long extid); 69 bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx); 70 int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run); 71 void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu); 72 73 int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num, 74 unsigned long *reg_val); 75 int kvm_riscv_vcpu_set_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num, 76 unsigned long reg_val); 77 78 #ifdef CONFIG_RISCV_SBI_V01 79 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01; 80 #endif 81 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base; 82 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time; 83 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi; 84 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence; 85 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst; 86 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm; 87 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn; 88 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta; 89 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental; 90 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor; 91 92 #ifdef CONFIG_RISCV_PMU_SBI 93 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu; 94 #endif 95 #endif /* __RISCV_KVM_VCPU_SBI_H__ */ 96