mirror of https://gitee.com/openkylin/qemu.git
189 lines
5.6 KiB
C
189 lines
5.6 KiB
C
/*
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* SGX EPC device
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*
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* Copyright (C) 2019 Intel Corporation
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*
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* Authors:
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* Sean Christopherson <sean.j.christopherson@intel.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "hw/i386/pc.h"
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#include "hw/i386/sgx-epc.h"
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#include "hw/mem/memory-device.h"
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#include "hw/qdev-properties.h"
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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#include "target/i386/cpu.h"
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#include "exec/address-spaces.h"
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static Property sgx_epc_properties[] = {
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DEFINE_PROP_UINT64(SGX_EPC_ADDR_PROP, SGXEPCDevice, addr, 0),
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DEFINE_PROP_UINT32(SGX_EPC_NUMA_NODE_PROP, SGXEPCDevice, node, 0),
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DEFINE_PROP_LINK(SGX_EPC_MEMDEV_PROP, SGXEPCDevice, hostmem,
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TYPE_MEMORY_BACKEND_EPC, HostMemoryBackendEpc *),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void sgx_epc_get_size(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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Error *local_err = NULL;
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uint64_t value;
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value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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visit_type_uint64(v, name, &value, errp);
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}
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static void sgx_epc_init(Object *obj)
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{
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object_property_add(obj, SGX_EPC_SIZE_PROP, "uint64", sgx_epc_get_size,
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NULL, NULL, NULL);
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}
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static void sgx_epc_realize(DeviceState *dev, Error **errp)
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{
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PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
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X86MachineState *x86ms = X86_MACHINE(pcms);
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MemoryDeviceState *md = MEMORY_DEVICE(dev);
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SGXEPCState *sgx_epc = &pcms->sgx_epc;
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SGXEPCDevice *epc = SGX_EPC(dev);
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HostMemoryBackend *hostmem;
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const char *path;
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if (x86ms->boot_cpus != 0) {
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error_setg(errp, "'" TYPE_SGX_EPC "' can't be created after vCPUs,"
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"e.g. via -device");
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return;
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}
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if (!epc->hostmem) {
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error_setg(errp, "'" SGX_EPC_MEMDEV_PROP "' property is not set");
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return;
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}
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hostmem = MEMORY_BACKEND(epc->hostmem);
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if (host_memory_backend_is_mapped(hostmem)) {
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path = object_get_canonical_path_component(OBJECT(hostmem));
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error_setg(errp, "can't use already busy memdev: %s", path);
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return;
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}
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epc->addr = sgx_epc->base + sgx_epc->size;
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memory_region_add_subregion(&sgx_epc->mr, epc->addr - sgx_epc->base,
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host_memory_backend_get_memory(hostmem));
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host_memory_backend_set_mapped(hostmem, true);
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sgx_epc->sections = g_renew(SGXEPCDevice *, sgx_epc->sections,
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sgx_epc->nr_sections + 1);
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sgx_epc->sections[sgx_epc->nr_sections++] = epc;
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sgx_epc->size += memory_device_get_region_size(md, errp);
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}
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static void sgx_epc_unrealize(DeviceState *dev)
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{
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SGXEPCDevice *epc = SGX_EPC(dev);
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HostMemoryBackend *hostmem = MEMORY_BACKEND(epc->hostmem);
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host_memory_backend_set_mapped(hostmem, false);
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}
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static uint64_t sgx_epc_md_get_addr(const MemoryDeviceState *md)
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{
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const SGXEPCDevice *epc = SGX_EPC(md);
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return epc->addr;
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}
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static void sgx_epc_md_set_addr(MemoryDeviceState *md, uint64_t addr,
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Error **errp)
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{
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object_property_set_uint(OBJECT(md), SGX_EPC_ADDR_PROP, addr, errp);
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}
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static uint64_t sgx_epc_md_get_plugged_size(const MemoryDeviceState *md,
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Error **errp)
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{
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return 0;
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}
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static MemoryRegion *sgx_epc_md_get_memory_region(MemoryDeviceState *md,
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Error **errp)
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{
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SGXEPCDevice *epc = SGX_EPC(md);
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HostMemoryBackend *hostmem;
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if (!epc->hostmem) {
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error_setg(errp, "'" SGX_EPC_MEMDEV_PROP "' property must be set");
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return NULL;
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}
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hostmem = MEMORY_BACKEND(epc->hostmem);
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return host_memory_backend_get_memory(hostmem);
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}
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static void sgx_epc_md_fill_device_info(const MemoryDeviceState *md,
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MemoryDeviceInfo *info)
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{
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SgxEPCDeviceInfo *se = g_new0(SgxEPCDeviceInfo, 1);
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SGXEPCDevice *epc = SGX_EPC(md);
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se->memaddr = epc->addr;
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se->size = object_property_get_uint(OBJECT(epc), SGX_EPC_SIZE_PROP,
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NULL);
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se->node = object_property_get_uint(OBJECT(epc), SGX_EPC_NUMA_NODE_PROP,
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NULL);
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se->memdev = object_get_canonical_path(OBJECT(epc->hostmem));
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info->u.sgx_epc.data = se;
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info->type = MEMORY_DEVICE_INFO_KIND_SGX_EPC;
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}
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static void sgx_epc_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
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dc->hotpluggable = false;
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dc->realize = sgx_epc_realize;
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dc->unrealize = sgx_epc_unrealize;
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dc->desc = "SGX EPC section";
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dc->user_creatable = false;
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device_class_set_props(dc, sgx_epc_properties);
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mdc->get_addr = sgx_epc_md_get_addr;
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mdc->set_addr = sgx_epc_md_set_addr;
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mdc->get_plugged_size = sgx_epc_md_get_plugged_size;
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mdc->get_memory_region = sgx_epc_md_get_memory_region;
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mdc->fill_device_info = sgx_epc_md_fill_device_info;
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}
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static const TypeInfo sgx_epc_info = {
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.name = TYPE_SGX_EPC,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(SGXEPCDevice),
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.instance_init = sgx_epc_init,
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.class_init = sgx_epc_class_init,
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.class_size = sizeof(DeviceClass),
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_MEMORY_DEVICE },
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{ }
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},
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};
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static void sgx_epc_register_types(void)
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{
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type_register_static(&sgx_epc_info);
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}
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type_init(sgx_epc_register_types)
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