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 1
  15 #define KVM_SBI_VERSION_MINOR 0
  16
  17 enum kvm_riscv_sbi_ext_status {
  18         KVM_RISCV_SBI_EXT_UNINITIALIZED,
  19         KVM_RISCV_SBI_EXT_AVAILABLE,
  20         KVM_RISCV_SBI_EXT_UNAVAILABLE,
  21 };
  22
  23 struct kvm_vcpu_sbi_context {
  24         int return_handled;
  25         enum kvm_riscv_sbi_ext_status ext_status[KVM_RISCV_SBI_EXT_MAX];
  26 };
  27
  28 struct kvm_vcpu_sbi_return {
  29         unsigned long out_val;
  30         unsigned long err_val;
  31         struct kvm_cpu_trap *utrap;
  32         bool uexit;
  33 };
  34
  35 struct kvm_vcpu_sbi_extension {
  36         unsigned long extid_start;
  37         unsigned long extid_end;
  38         /**
  39          * SBI extension handler. It can be defined for a given extension or group of
  40          * extension. But it should always return linux error codes rather than SBI
  41          * specific error codes.
  42          */
  43         int (*handler)(struct kvm_vcpu *vcpu, struct kvm_run *run,
  44                        struct kvm_vcpu_sbi_return *retdata);
  45
  46         /* Extension specific probe function */
  47         unsigned long (*probe)(struct kvm_vcpu *vcpu);
  48 };
  49
  50 void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run);
  51 void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu,
  52                                      struct kvm_run *run,
  53                                      u32 type, u64 flags);
  54 int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
  55 int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu,
  56                                    const struct kvm_one_reg *reg);
  57 int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu,
  58                                    const struct kvm_one_reg *reg);
  59 const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
  60                                 struct kvm_vcpu *vcpu, unsigned long extid);
  61 int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run);
  62
  63 #ifdef CONFIG_RISCV_SBI_V01
  64 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01;
  65 #endif
  66 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_base;
  67 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_time;
  68 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_ipi;
  69 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence;
  70 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst;
  71 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm;
  72 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental;
  73 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor;
  74
  75 #ifdef CONFIG_RISCV_PMU_SBI
  76 extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_pmu;
  77 #endif
  78 #endif /* __RISCV_KVM_VCPU_SBI_H__ */