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 1 15 #define KVM_SBI_VERSION_MINOR 0 16 17 enum kvm_riscv_sbi_ext_status { 18 KVM_RISCV_SBI_EXT_UNINITIALIZED, 19 KVM_RISCV_SBI_EXT_AVAILABLE, 20 KVM_RISCV_SBI_EXT_UNAVAILABLE, 21 }; 22 23 struct kvm_vcpu_sbi_context { 24 int return_handled; 25 enum kvm_riscv_sbi_ext_status ext_status[KVM_RISCV_SBI_EXT_MAX]; 26 }; 27 28 struct kvm_vcpu_sbi_return { 29 unsigned long out_val; 30 unsigned long err_val; 31 struct kvm_cpu_trap *utrap; 32 bool uexit; 33 }; 34 35 struct kvm_vcpu_sbi_extension { 36 unsigned long extid_start; 37 unsigned long extid_end; 38 /** 39 * SBI extension handler. It can be defined for a given extension or group of 40 * extension. But it should always return linux error codes rather than SBI 41 * specific error codes. 42 */ 43 int (*handler)(struct kvm_vcpu *vcpu, struct kvm_run *run, 44 struct kvm_vcpu_sbi_return *retdata); 45 46 /* Extension specific probe function */ 47 unsigned long (*probe)(struct kvm_vcpu *vcpu); 48 }; 49 50 void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run); 51 void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu, 52 struct kvm_run *run, 53 u32 type, u64 flags); 54 int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run); 55 int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu, 56 const struct kvm_one_reg *reg); 57 int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu, 58 const struct kvm_one_reg *reg); 59 const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext( 60 struct kvm_vcpu *vcpu, unsigned long extid); 61 int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run); 62 63 #ifdef CONFIG_RISCV_SBI_V01 64 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01; 65 #endif 66 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base; 67 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time; 68 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi; 69 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence; 70 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst; 71 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm; 72 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental; 73 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor; 74 75 #ifdef CONFIG_RISCV_PMU_SBI 76 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu; 77 #endif 78 #endif /* __RISCV_KVM_VCPU_SBI_H__ */ 79