Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * RISC-V processor specific defines
4 *
5 * Copyright (C) 2021 Western Digital Corporation or its affiliates.
6 */
7#ifndef SELFTEST_KVM_PROCESSOR_H
8#define SELFTEST_KVM_PROCESSOR_H
9
10#include <linux/stringify.h>
11#include <asm/csr.h>
12#include "kvm_util.h"
13
14#define INSN_OPCODE_MASK 0x007c
15#define INSN_OPCODE_SHIFT 2
16#define INSN_OPCODE_SYSTEM 28
17
18#define INSN_MASK_FUNCT3 0x7000
19#define INSN_SHIFT_FUNCT3 12
20
21#define INSN_CSR_MASK 0xfff00000
22#define INSN_CSR_SHIFT 20
23
24#define GET_RM(insn) (((insn) & INSN_MASK_FUNCT3) >> INSN_SHIFT_FUNCT3)
25#define GET_CSR_NUM(insn) (((insn) & INSN_CSR_MASK) >> INSN_CSR_SHIFT)
26
27static inline uint64_t __kvm_reg_id(uint64_t type, uint64_t subtype,
28 uint64_t idx, uint64_t size)
29{
30 return KVM_REG_RISCV | type | subtype | idx | size;
31}
32
33#if __riscv_xlen == 64
34#define KVM_REG_SIZE_ULONG KVM_REG_SIZE_U64
35#else
36#define KVM_REG_SIZE_ULONG KVM_REG_SIZE_U32
37#endif
38
39#define RISCV_CONFIG_REG(name) __kvm_reg_id(KVM_REG_RISCV_CONFIG, 0, \
40 KVM_REG_RISCV_CONFIG_REG(name), \
41 KVM_REG_SIZE_ULONG)
42
43#define RISCV_CORE_REG(name) __kvm_reg_id(KVM_REG_RISCV_CORE, 0, \
44 KVM_REG_RISCV_CORE_REG(name), \
45 KVM_REG_SIZE_ULONG)
46
47#define RISCV_GENERAL_CSR_REG(name) __kvm_reg_id(KVM_REG_RISCV_CSR, \
48 KVM_REG_RISCV_CSR_GENERAL, \
49 KVM_REG_RISCV_CSR_REG(name), \
50 KVM_REG_SIZE_ULONG)
51
52#define RISCV_TIMER_REG(name) __kvm_reg_id(KVM_REG_RISCV_TIMER, 0, \
53 KVM_REG_RISCV_TIMER_REG(name), \
54 KVM_REG_SIZE_U64)
55
56#define RISCV_ISA_EXT_REG(idx) __kvm_reg_id(KVM_REG_RISCV_ISA_EXT, \
57 KVM_REG_RISCV_ISA_SINGLE, \
58 idx, KVM_REG_SIZE_ULONG)
59
60#define RISCV_SBI_EXT_REG(idx) __kvm_reg_id(KVM_REG_RISCV_SBI_EXT, \
61 KVM_REG_RISCV_SBI_SINGLE, \
62 idx, KVM_REG_SIZE_ULONG)
63
64bool __vcpu_has_ext(struct kvm_vcpu *vcpu, uint64_t ext);
65
66static inline bool __vcpu_has_isa_ext(struct kvm_vcpu *vcpu, uint64_t isa_ext)
67{
68 return __vcpu_has_ext(vcpu, RISCV_ISA_EXT_REG(isa_ext));
69}
70
71static inline bool __vcpu_has_sbi_ext(struct kvm_vcpu *vcpu, uint64_t sbi_ext)
72{
73 return __vcpu_has_ext(vcpu, RISCV_SBI_EXT_REG(sbi_ext));
74}
75
76struct pt_regs {
77 unsigned long epc;
78 unsigned long ra;
79 unsigned long sp;
80 unsigned long gp;
81 unsigned long tp;
82 unsigned long t0;
83 unsigned long t1;
84 unsigned long t2;
85 unsigned long s0;
86 unsigned long s1;
87 unsigned long a0;
88 unsigned long a1;
89 unsigned long a2;
90 unsigned long a3;
91 unsigned long a4;
92 unsigned long a5;
93 unsigned long a6;
94 unsigned long a7;
95 unsigned long s2;
96 unsigned long s3;
97 unsigned long s4;
98 unsigned long s5;
99 unsigned long s6;
100 unsigned long s7;
101 unsigned long s8;
102 unsigned long s9;
103 unsigned long s10;
104 unsigned long s11;
105 unsigned long t3;
106 unsigned long t4;
107 unsigned long t5;
108 unsigned long t6;
109 /* Supervisor/Machine CSRs */
110 unsigned long status;
111 unsigned long badaddr;
112 unsigned long cause;
113 /* a0 value before the syscall */
114 unsigned long orig_a0;
115};
116
117#define NR_VECTORS 2
118#define NR_EXCEPTIONS 32
119#define EC_MASK (NR_EXCEPTIONS - 1)
120
121typedef void(*exception_handler_fn)(struct pt_regs *);
122
123void vm_init_vector_tables(struct kvm_vm *vm);
124void vcpu_init_vector_tables(struct kvm_vcpu *vcpu);
125
126void vm_install_exception_handler(struct kvm_vm *vm, int vector, exception_handler_fn handler);
127
128void vm_install_interrupt_handler(struct kvm_vm *vm, exception_handler_fn handler);
129
130/* L3 index Bit[47:39] */
131#define PGTBL_L3_INDEX_MASK 0x0000FF8000000000ULL
132#define PGTBL_L3_INDEX_SHIFT 39
133#define PGTBL_L3_BLOCK_SHIFT 39
134#define PGTBL_L3_BLOCK_SIZE 0x0000008000000000ULL
135#define PGTBL_L3_MAP_MASK (~(PGTBL_L3_BLOCK_SIZE - 1))
136/* L2 index Bit[38:30] */
137#define PGTBL_L2_INDEX_MASK 0x0000007FC0000000ULL
138#define PGTBL_L2_INDEX_SHIFT 30
139#define PGTBL_L2_BLOCK_SHIFT 30
140#define PGTBL_L2_BLOCK_SIZE 0x0000000040000000ULL
141#define PGTBL_L2_MAP_MASK (~(PGTBL_L2_BLOCK_SIZE - 1))
142/* L1 index Bit[29:21] */
143#define PGTBL_L1_INDEX_MASK 0x000000003FE00000ULL
144#define PGTBL_L1_INDEX_SHIFT 21
145#define PGTBL_L1_BLOCK_SHIFT 21
146#define PGTBL_L1_BLOCK_SIZE 0x0000000000200000ULL
147#define PGTBL_L1_MAP_MASK (~(PGTBL_L1_BLOCK_SIZE - 1))
148/* L0 index Bit[20:12] */
149#define PGTBL_L0_INDEX_MASK 0x00000000001FF000ULL
150#define PGTBL_L0_INDEX_SHIFT 12
151#define PGTBL_L0_BLOCK_SHIFT 12
152#define PGTBL_L0_BLOCK_SIZE 0x0000000000001000ULL
153#define PGTBL_L0_MAP_MASK (~(PGTBL_L0_BLOCK_SIZE - 1))
154
155#define PGTBL_PTE_ADDR_MASK 0x003FFFFFFFFFFC00ULL
156#define PGTBL_PTE_ADDR_SHIFT 10
157#define PGTBL_PTE_RSW_MASK 0x0000000000000300ULL
158#define PGTBL_PTE_RSW_SHIFT 8
159#define PGTBL_PTE_DIRTY_MASK 0x0000000000000080ULL
160#define PGTBL_PTE_DIRTY_SHIFT 7
161#define PGTBL_PTE_ACCESSED_MASK 0x0000000000000040ULL
162#define PGTBL_PTE_ACCESSED_SHIFT 6
163#define PGTBL_PTE_GLOBAL_MASK 0x0000000000000020ULL
164#define PGTBL_PTE_GLOBAL_SHIFT 5
165#define PGTBL_PTE_USER_MASK 0x0000000000000010ULL
166#define PGTBL_PTE_USER_SHIFT 4
167#define PGTBL_PTE_EXECUTE_MASK 0x0000000000000008ULL
168#define PGTBL_PTE_EXECUTE_SHIFT 3
169#define PGTBL_PTE_WRITE_MASK 0x0000000000000004ULL
170#define PGTBL_PTE_WRITE_SHIFT 2
171#define PGTBL_PTE_READ_MASK 0x0000000000000002ULL
172#define PGTBL_PTE_READ_SHIFT 1
173#define PGTBL_PTE_PERM_MASK (PGTBL_PTE_ACCESSED_MASK | \
174 PGTBL_PTE_DIRTY_MASK | \
175 PGTBL_PTE_EXECUTE_MASK | \
176 PGTBL_PTE_WRITE_MASK | \
177 PGTBL_PTE_READ_MASK)
178#define PGTBL_PTE_VALID_MASK 0x0000000000000001ULL
179#define PGTBL_PTE_VALID_SHIFT 0
180
181#define PGTBL_PAGE_SIZE PGTBL_L0_BLOCK_SIZE
182#define PGTBL_PAGE_SIZE_SHIFT PGTBL_L0_BLOCK_SHIFT
183
184static inline void local_irq_enable(void)
185{
186 csr_set(CSR_SSTATUS, SR_SIE);
187}
188
189static inline void local_irq_disable(void)
190{
191 csr_clear(CSR_SSTATUS, SR_SIE);
192}
193
194#endif /* SELFTEST_KVM_PROCESSOR_H */