mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-09-18 23:09:29 +02:00
Inochi Amaoto
e4f24f9a90
When user disable FWFT extension after setting any value of the FWFT feature, the state of vCPU will be broken since the value of disable FWFT feature is still functional. Add the generic SBI extension validate callback so the FWFT extension can fix its parameters before the first run. Signed-off-by: Inochi Amaoto <inochiama@gmail.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20260729232527.139183-2-inochiama@gmail.com Signed-off-by: Anup Patel <anup@brainfault.org>
122 lines
4.5 KiB
C
122 lines
4.5 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 3
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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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/* Allow the extension to correct its parameters before the first run */
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void (*validate)(struct kvm_vcpu *vcpu);
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unsigned long state_reg_subtype;
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unsigned long (*get_state_reg_count)(struct kvm_vcpu *vcpu);
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int (*get_state_reg_id)(struct kvm_vcpu *vcpu, int index, u64 *reg_id);
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int (*get_state_reg)(struct kvm_vcpu *vcpu, unsigned long reg_num,
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unsigned long reg_size, void *reg_val);
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int (*set_state_reg)(struct kvm_vcpu *vcpu, unsigned long reg_num,
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unsigned long reg_size, const void *reg_val);
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};
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int kvm_riscv_vcpu_sbi_forward_handler(struct kvm_vcpu *vcpu,
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struct kvm_run *run,
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struct kvm_vcpu_sbi_return *retdata);
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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_reg_indices_sbi_ext(struct kvm_vcpu *vcpu, u64 __user *uindices);
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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_reg_indices_sbi(struct kvm_vcpu *vcpu, u64 __user *uindices);
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int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
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int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu, 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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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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void kvm_riscv_vcpu_sbi_validate(struct kvm_vcpu *vcpu);
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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_fwft;
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extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_mpxy;
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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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