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