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c046de827c
Currently, only the STA extension needed a reset function but that's going to be the case for FWFT as well. Add a reset callback that can be implemented by SBI extensions. Signed-off-by: Clément Léger <cleger@rivosinc.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com> Link: https://lore.kernel.org/r/20250523101932.1594077-13-cleger@rivosinc.com Signed-off-by: Anup Patel <anup@brainfault.org>
111 lines
3.9 KiB
C
111 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/**
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Atish Patra <atish.patra@wdc.com>
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*/
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#ifndef __RISCV_KVM_VCPU_SBI_H__
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#define __RISCV_KVM_VCPU_SBI_H__
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#define KVM_SBI_IMPID 3
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#define KVM_SBI_VERSION_MAJOR 2
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#define KVM_SBI_VERSION_MINOR 0
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enum kvm_riscv_sbi_ext_status {
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KVM_RISCV_SBI_EXT_STATUS_UNINITIALIZED,
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KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE,
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KVM_RISCV_SBI_EXT_STATUS_ENABLED,
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KVM_RISCV_SBI_EXT_STATUS_DISABLED,
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};
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struct kvm_vcpu_sbi_context {
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int return_handled;
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enum kvm_riscv_sbi_ext_status ext_status[KVM_RISCV_SBI_EXT_MAX];
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};
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struct kvm_vcpu_sbi_return {
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unsigned long out_val;
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unsigned long err_val;
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struct kvm_cpu_trap *utrap;
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bool uexit;
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};
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struct kvm_vcpu_sbi_extension {
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unsigned long extid_start;
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unsigned long extid_end;
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bool default_disabled;
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/**
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* SBI extension handler. It can be defined for a given extension or group of
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* extension. But it should always return linux error codes rather than SBI
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* specific error codes.
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*/
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int (*handler)(struct kvm_vcpu *vcpu, struct kvm_run *run,
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struct kvm_vcpu_sbi_return *retdata);
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/* Extension specific probe function */
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unsigned long (*probe)(struct kvm_vcpu *vcpu);
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/*
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* Init/deinit function called once during VCPU init/destroy. These
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* might be use if the SBI extensions need to allocate or do specific
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* init time only configuration.
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*/
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int (*init)(struct kvm_vcpu *vcpu);
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void (*deinit)(struct kvm_vcpu *vcpu);
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void (*reset)(struct kvm_vcpu *vcpu);
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};
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void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run);
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void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu,
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struct kvm_run *run,
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u32 type, u64 flags);
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void kvm_riscv_vcpu_sbi_request_reset(struct kvm_vcpu *vcpu,
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unsigned long pc, unsigned long a1);
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void kvm_riscv_vcpu_sbi_load_reset_state(struct kvm_vcpu *vcpu);
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int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
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int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu,
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const struct kvm_one_reg *reg);
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int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu,
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const struct kvm_one_reg *reg);
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int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu,
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const struct kvm_one_reg *reg);
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int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu,
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const struct kvm_one_reg *reg);
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const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
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struct kvm_vcpu *vcpu, unsigned long extid);
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bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx);
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int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run);
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void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu);
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void kvm_riscv_vcpu_sbi_deinit(struct kvm_vcpu *vcpu);
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void kvm_riscv_vcpu_sbi_reset(struct kvm_vcpu *vcpu);
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int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num,
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unsigned long *reg_val);
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int kvm_riscv_vcpu_set_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num,
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unsigned long reg_val);
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#ifdef CONFIG_RISCV_SBI_V01
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01;
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#endif
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_susp;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor;
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#ifdef CONFIG_RISCV_PMU_SBI
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
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#endif
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#endif /* __RISCV_KVM_VCPU_SBI_H__ */
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