linux-headers/asm-loongarch/kvm.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
   4  */
   5
   6 #ifndef __UAPI_ASM_LOONGARCH_KVM_H
   7 #define __UAPI_ASM_LOONGARCH_KVM_H
   8
   9 #include <linux/types.h>
  10
  11 /*
  12  * KVM LoongArch specific structures and definitions.
  13  *
  14  * Some parts derived from the x86 version of this file.
  15  */
  16
  17 #define __KVM_HAVE_READONLY_MEM
  18
  19 #define KVM_COALESCED_MMIO_PAGE_OFFSET  1
  20 #define KVM_DIRTY_LOG_PAGE_OFFSET       64
  21
  22 /*
  23  * for KVM_GET_REGS and KVM_SET_REGS
  24  */
  25 struct kvm_regs {
  26         /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
  27         __u64 gpr[32];
  28         __u64 pc;
  29 };
  30
  31 /*
  32  * for KVM_GET_FPU and KVM_SET_FPU
  33  */
  34 struct kvm_fpu {
  35         __u32 fcsr;
  36         __u64 fcc;    /* 8x8 */
  37         struct kvm_fpureg {
  38                 __u64 val64[4];
  39         } fpr[32];
  40 };
  41
  42 /*
  43  * For LoongArch, we use KVM_SET_ONE_REG and KVM_GET_ONE_REG to access various
  44  * registers.  The id field is broken down as follows:
  45  *
  46  *  bits[63..52] - As per linux/kvm.h
  47  *  bits[51..32] - Must be zero.
  48  *  bits[31..16] - Register set.
  49  *
  50  * Register set = 0: GP registers from kvm_regs (see definitions below).
  51  *
  52  * Register set = 1: CSR registers.
  53  *
  54  * Register set = 2: KVM specific registers (see definitions below).
  55  *
  56  * Register set = 3: FPU / SIMD registers (see definitions below).
  57  *
  58  * Other sets registers may be added in the future.  Each set would
  59  * have its own identifier in bits[31..16].
  60  */
  61
  62 #define KVM_REG_LOONGARCH_GPR           (KVM_REG_LOONGARCH | 0x00000ULL)
  63 #define KVM_REG_LOONGARCH_CSR           (KVM_REG_LOONGARCH | 0x10000ULL)
  64 #define KVM_REG_LOONGARCH_KVM           (KVM_REG_LOONGARCH | 0x20000ULL)
  65 #define KVM_REG_LOONGARCH_FPSIMD        (KVM_REG_LOONGARCH | 0x30000ULL)
  66 #define KVM_REG_LOONGARCH_CPUCFG        (KVM_REG_LOONGARCH | 0x40000ULL)
  67 #define KVM_REG_LOONGARCH_MASK          (KVM_REG_LOONGARCH | 0x70000ULL)
  68 #define KVM_CSR_IDX_MASK                0x7fff
  69 #define KVM_CPUCFG_IDX_MASK             0x7fff
  70
  71 /*
  72  * KVM_REG_LOONGARCH_KVM - KVM specific control registers.
  73  */
  74
  75 #define KVM_REG_LOONGARCH_COUNTER       (KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 1)
  76 #define KVM_REG_LOONGARCH_VCPU_RESET    (KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 2)
  77
  78 #define LOONGARCH_REG_SHIFT             3
  79 #define LOONGARCH_REG_64(TYPE, REG)     (TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))
  80 #define KVM_IOC_CSRID(REG)              LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, REG)
  81 #define KVM_IOC_CPUCFG(REG)             LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)
  82
  83 struct kvm_debug_exit_arch {
  84 };
  85
  86 /* for KVM_SET_GUEST_DEBUG */
  87 struct kvm_guest_debug_arch {
  88 };
  89
  90 /* definition of registers in kvm_run */
  91 struct kvm_sync_regs {
  92 };
  93
  94 /* dummy definition */
  95 struct kvm_sregs {
  96 };
  97
  98 struct kvm_iocsr_entry {
  99         __u32 addr;
 100         __u32 pad;
 101         __u64 data;
 102 };
 103
 104 #define KVM_NR_IRQCHIPS         1
 105 #define KVM_IRQCHIP_NUM_PINS    64
 106 #define KVM_MAX_CORES           256
 107
 108 #endif /* __UAPI_ASM_LOONGARCH_KVM_H */