1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* Copyright (c) 2015-2017 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Andreas Sandberg
* Curtis Dunham
*/
#ifndef __ARCH_ARM_KVM_GIC_HH__
#define __ARCH_ARM_KVM_GIC_HH__
#include "arch/arm/system.hh"
#include "cpu/kvm/device.hh"
#include "cpu/kvm/vm.hh"
#include "dev/arm/gic_pl390.hh"
#include "dev/platform.hh"
/**
* KVM in-kernel GIC abstraction
*
* This class defines a high-level interface to the KVM in-kernel GIC
* model. It exposes an API that is similar to that of
* software-emulated GIC models in gem5.
*/
class KvmKernelGicV2 : public BaseGicRegisters
{
public:
/**
* Instantiate a KVM in-kernel GIC model.
*
* This constructor instantiates an in-kernel GIC model and wires
* it up to the virtual memory system.
*
* @param vm KVM VM representing this system
* @param cpu_addr GIC CPU interface base address
* @param dist_addr GIC distributor base address
* @param it_lines Number of interrupt lines to support
*/
KvmKernelGicV2(KvmVM &vm, Addr cpu_addr, Addr dist_addr,
unsigned it_lines);
virtual ~KvmKernelGicV2();
KvmKernelGicV2(const KvmKernelGicV2 &other) = delete;
KvmKernelGicV2(const KvmKernelGicV2 &&other) = delete;
KvmKernelGicV2 &operator=(const KvmKernelGicV2 &&rhs) = delete;
KvmKernelGicV2 &operator=(const KvmKernelGicV2 &rhs) = delete;
public:
/**
* @{
* @name In-kernel GIC API
*/
/**
* Raise a shared peripheral interrupt
*
* @param spi SPI number
*/
void setSPI(unsigned spi);
/**
* Clear a shared peripheral interrupt
*
* @param spi SPI number
*/
void clearSPI(unsigned spi);
/**
* Raise a private peripheral interrupt
*
* @param vcpu KVM virtual CPU number
* @parma ppi PPI interrupt number
*/
void setPPI(unsigned vcpu, unsigned ppi);
/**
* Clear a private peripheral interrupt
*
* @param vcpu KVM virtual CPU number
* @parma ppi PPI interrupt number
*/
void clearPPI(unsigned vcpu, unsigned ppi);
/** Address range for the CPU interfaces */
const AddrRange cpuRange;
/** Address range for the distributor interface */
const AddrRange distRange;
/** BaseGicRegisters interface */
uint32_t readDistributor(ContextID ctx, Addr daddr) override;
uint32_t readCpu(ContextID ctx, Addr daddr) override;
void writeDistributor(ContextID ctx, Addr daddr,
uint32_t data) override;
void writeCpu(ContextID ctx, Addr daddr, uint32_t data) override;
/* @} */
protected:
/**
* Update the kernel's VGIC interrupt state
*
* @param type Interrupt type (KVM_ARM_IRQ_TYPE_PPI/KVM_ARM_IRQ_TYPE_SPI)
* @param vcpu CPU id within KVM (ignored for SPIs)
* @param irq Interrupt number
* @param high True to signal an interrupt, false to clear it.
*/
void setIntState(unsigned type, unsigned vcpu, unsigned irq, bool high);
/**
* Get value of GIC register "from" a cpu
*
* @param group Distributor or CPU (KVM_DEV_ARM_VGIC_GRP_{DIST,CPU}_REGS)
* @param vcpu CPU id within KVM
* @param offset register offset
*/
uint32_t getGicReg(unsigned group, unsigned vcpu, unsigned offset);
/**
* Set value of GIC register "from" a cpu
*
* @param group Distributor or CPU (KVM_DEV_ARM_VGIC_GRP_{DIST,CPU}_REGS)
* @param vcpu CPU id within KVM
* @param offset register offset
* @param value value to set register to
*/
void setGicReg(unsigned group, unsigned vcpu, unsigned offset,
unsigned value);
/** KVM VM in the parent system */
KvmVM &vm;
/** Kernel interface to the GIC */
KvmDevice kdev;
};
struct MuxingKvmGicParams;
class MuxingKvmGic : public Pl390
{
public: // SimObject / Serializable / Drainable
MuxingKvmGic(const MuxingKvmGicParams *p);
~MuxingKvmGic();
void loadState(CheckpointIn &cp) override;
void startup() override;
DrainState drain() override;
void drainResume() override;
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
public: // PioDevice
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
public: // Pl390
void sendInt(uint32_t num) override;
void clearInt(uint32_t num) override;
void sendPPInt(uint32_t num, uint32_t cpu) override;
void clearPPInt(uint32_t num, uint32_t cpu) override;
protected:
/** System this interrupt controller belongs to */
System &system;
/** Kernel GIC device */
KvmKernelGicV2 *kernelGic;
private:
bool usingKvm;
/** Multiplexing implementation */
void fromPl390ToKvm();
void fromKvmToPl390();
void copyGicState(BaseGicRegisters* from, BaseGicRegisters* to);
void copyDistRegister(BaseGicRegisters* from, BaseGicRegisters* to,
ContextID ctx, Addr daddr);
void copyCpuRegister(BaseGicRegisters* from, BaseGicRegisters* to,
ContextID ctx, Addr daddr);
void copyBankedDistRange(BaseGicRegisters* from, BaseGicRegisters* to,
Addr daddr, size_t size);
void clearBankedDistRange(BaseGicRegisters* to,
Addr daddr, size_t size);
void copyDistRange(BaseGicRegisters* from, BaseGicRegisters* to,
Addr daddr, size_t size);
void clearDistRange(BaseGicRegisters* to,
Addr daddr, size_t size);
};
#endif // __ARCH_ARM_KVM_GIC_HH__
|
