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/* SPDX-License-Identifier: GPL-2.0-only */
/**
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
*
* Authors:
* Atish Patra <atish.patra@wdc.com>
*/
#ifndef __RISCV_KVM_VCPU_SBI_H__
#define __RISCV_KVM_VCPU_SBI_H__
#define KVM_SBI_IMPID 3
#define KVM_SBI_VERSION_MAJOR 2
#define KVM_SBI_VERSION_MINOR 0
enum kvm_riscv_sbi_ext_status {
KVM_RISCV_SBI_EXT_STATUS_UNINITIALIZED,
KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE,
KVM_RISCV_SBI_EXT_STATUS_ENABLED,
KVM_RISCV_SBI_EXT_STATUS_DISABLED,
};
struct kvm_vcpu_sbi_context {
int return_handled;
enum kvm_riscv_sbi_ext_status ext_status[KVM_RISCV_SBI_EXT_MAX];
};
struct kvm_vcpu_sbi_return {
unsigned long out_val;
unsigned long err_val;
struct kvm_cpu_trap *utrap;
bool uexit;
};
struct kvm_vcpu_sbi_extension {
unsigned long extid_start;
unsigned long extid_end;
bool default_disabled;
/**
* SBI extension handler. It can be defined for a given extension or group of
* extension. But it should always return linux error codes rather than SBI
* specific error codes.
*/
int (*handler)(struct kvm_vcpu *vcpu, struct kvm_run *run,
struct kvm_vcpu_sbi_return *retdata);
/* Extension specific probe function */
unsigned long (*probe)(struct kvm_vcpu *vcpu);
};
void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run);
void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu,
struct kvm_run *run,
u32 type, u64 flags);
int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
struct kvm_vcpu *vcpu, unsigned long extid);
bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx);
int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run);
void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num,
unsigned long *reg_val);
int kvm_riscv_vcpu_set_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num,
unsigned long reg_val);
#ifdef CONFIG_RISCV_SBI_V01
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01;
#endif
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental;
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor;
#ifdef CONFIG_RISCV_PMU_SBI
extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
#endif
#endif /* __RISCV_KVM_VCPU_SBI_H__ */
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