xref: /openbmc/qemu/include/hw/i386/sgx-epc.h (revision 2b74dd91)
1 /*
2  * SGX EPC device
3  *
4  * Copyright (C) 2019 Intel Corporation
5  *
6  * Authors:
7  *   Sean Christopherson <sean.j.christopherson@intel.com>
8  *
9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
10  * See the COPYING file in the top-level directory.
11  */
12 #ifndef QEMU_SGX_EPC_H
13 #define QEMU_SGX_EPC_H
14 
15 #include "hw/qdev-core.h"
16 #include "hw/i386/hostmem-epc.h"
17 
18 #define TYPE_SGX_EPC "sgx-epc"
19 #define SGX_EPC(obj) \
20     OBJECT_CHECK(SGXEPCDevice, (obj), TYPE_SGX_EPC)
21 #define SGX_EPC_CLASS(oc) \
22     OBJECT_CLASS_CHECK(SGXEPCDeviceClass, (oc), TYPE_SGX_EPC)
23 #define SGX_EPC_GET_CLASS(obj) \
24     OBJECT_GET_CLASS(SGXEPCDeviceClass, (obj), TYPE_SGX_EPC)
25 
26 #define SGX_EPC_ADDR_PROP "addr"
27 #define SGX_EPC_SIZE_PROP "size"
28 #define SGX_EPC_MEMDEV_PROP "memdev"
29 #define SGX_EPC_NUMA_NODE_PROP "node"
30 
31 /**
32  * SGXEPCDevice:
33  * @addr: starting guest physical address, where @SGXEPCDevice is mapped.
34  *         Default value: 0, means that address is auto-allocated.
35  * @hostmem: host memory backend providing memory for @SGXEPCDevice
36  */
37 typedef struct SGXEPCDevice {
38     /* private */
39     DeviceState parent_obj;
40 
41     /* public */
42     uint64_t addr;
43     uint32_t node;
44     HostMemoryBackendEpc *hostmem;
45 } SGXEPCDevice;
46 
47 /*
48  * @base: address in guest physical address space where EPC regions start
49  * @mr: address space container for memory devices
50  */
51 typedef struct SGXEPCState {
52     uint64_t base;
53     uint64_t size;
54 
55     MemoryRegion mr;
56 
57     struct SGXEPCDevice **sections;
58     int nr_sections;
59 } SGXEPCState;
60 
61 bool check_sgx_support(void);
62 bool sgx_epc_get_section(int section_nr, uint64_t *addr, uint64_t *size);
63 void sgx_epc_build_srat(GArray *table_data);
64 
65 static inline uint64_t sgx_epc_above_4g_end(SGXEPCState *sgx_epc)
66 {
67     assert(sgx_epc != NULL && sgx_epc->base >= 0x100000000ULL);
68 
69     return sgx_epc->base + sgx_epc->size;
70 }
71 
72 #endif
73