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
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