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_COALESCED_MMIO_PAGE_OFFSET 1
18 #define KVM_DIRTY_LOG_PAGE_OFFSET 64
19
20 #define KVM_GUESTDBG_USE_SW_BP 0x00010000
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 /* Debugging: Special instruction for software breakpoint */
78 #define KVM_REG_LOONGARCH_DEBUG_INST (KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 3)
79
80 #define LOONGARCH_REG_SHIFT 3
81 #define LOONGARCH_REG_64(TYPE, REG) (TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))
82 #define KVM_IOC_CSRID(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, REG)
83 #define KVM_IOC_CPUCFG(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)
84
85 /* Device Control API on vcpu fd */
86 #define KVM_LOONGARCH_VCPU_CPUCFG 0
87 #define KVM_LOONGARCH_VCPU_PVTIME_CTRL 1
88 #define KVM_LOONGARCH_VCPU_PVTIME_GPA 0
89
90 struct kvm_debug_exit_arch {
91 };
92
93 /* for KVM_SET_GUEST_DEBUG */
94 struct kvm_guest_debug_arch {
95 };
96
97 /* definition of registers in kvm_run */
98 struct kvm_sync_regs {
99 };
100
101 /* dummy definition */
102 struct kvm_sregs {
103 };
104
105 struct kvm_iocsr_entry {
106 __u32 addr;
107 __u32 pad;
108 __u64 data;
109 };
110
111 #define KVM_NR_IRQCHIPS 1
112 #define KVM_IRQCHIP_NUM_PINS 64
113 #define KVM_MAX_CORES 256
114
115 #endif /* __UAPI_ASM_LOONGARCH_KVM_H */
116
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