arch/riscv/include/asm/kvm_vcpu_sbi.h

   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__ */