include/hw/i386/sgx-epc.h

   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