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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
17enum 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
24struct kvm_vcpu_sbi_context {
25 int return_handled;
26 enum kvm_riscv_sbi_ext_status ext_status[KVM_RISCV_SBI_EXT_MAX];
27};
28
29struct 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
36struct 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
54void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run);
55void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu,
56 struct kvm_run *run,
57 u32 type, u64 flags);
58int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
59int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu,
60 const struct kvm_one_reg *reg);
61int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu,
62 const struct kvm_one_reg *reg);
63int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu,
64 const struct kvm_one_reg *reg);
65int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu,
66 const struct kvm_one_reg *reg);
67const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
68 struct kvm_vcpu *vcpu, unsigned long extid);
69bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx);
70int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run);
71void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu);
72
73int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num,
74 unsigned long *reg_val);
75int 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
79extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01;
80#endif
81extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base;
82extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time;
83extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi;
84extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence;
85extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst;
86extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm;
87extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn;
88extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta;
89extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental;
90extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor;
91
92#ifdef CONFIG_RISCV_PMU_SBI
93extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
94#endif
95#endif /* __RISCV_KVM_VCPU_SBI_H__ */