mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-24 20:19:44 +00:00
0f9668e0c1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
|
|
* QEMU host SGX EPC memory backend
|
|
*
|
|
* Copyright (C) 2019 Intel Corporation
|
|
*
|
|
* Authors:
|
|
* Sean Christopherson <sean.j.christopherson@intel.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
#include <sys/ioctl.h>
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qom/object_interfaces.h"
|
|
#include "qapi/error.h"
|
|
#include "sysemu/hostmem.h"
|
|
#include "hw/i386/hostmem-epc.h"
|
|
|
|
static void
|
|
sgx_epc_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
|
|
{
|
|
uint32_t ram_flags;
|
|
char *name;
|
|
int fd;
|
|
|
|
if (!backend->size) {
|
|
error_setg(errp, "can't create backend with size 0");
|
|
return;
|
|
}
|
|
|
|
fd = qemu_open_old("/dev/sgx_vepc", O_RDWR);
|
|
if (fd < 0) {
|
|
error_setg_errno(errp, errno,
|
|
"failed to open /dev/sgx_vepc to alloc SGX EPC");
|
|
return;
|
|
}
|
|
|
|
name = object_get_canonical_path(OBJECT(backend));
|
|
ram_flags = (backend->share ? RAM_SHARED : 0) | RAM_PROTECTED;
|
|
memory_region_init_ram_from_fd(&backend->mr, OBJECT(backend),
|
|
name, backend->size, ram_flags,
|
|
fd, 0, errp);
|
|
g_free(name);
|
|
}
|
|
|
|
static void sgx_epc_backend_instance_init(Object *obj)
|
|
{
|
|
HostMemoryBackend *m = MEMORY_BACKEND(obj);
|
|
|
|
m->share = true;
|
|
m->merge = false;
|
|
m->dump = false;
|
|
}
|
|
|
|
static void sgx_epc_backend_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
|
|
|
|
bc->alloc = sgx_epc_backend_memory_alloc;
|
|
}
|
|
|
|
static const TypeInfo sgx_epc_backed_info = {
|
|
.name = TYPE_MEMORY_BACKEND_EPC,
|
|
.parent = TYPE_MEMORY_BACKEND,
|
|
.instance_init = sgx_epc_backend_instance_init,
|
|
.class_init = sgx_epc_backend_class_init,
|
|
.instance_size = sizeof(HostMemoryBackendEpc),
|
|
};
|
|
|
|
static void register_types(void)
|
|
{
|
|
int fd = qemu_open_old("/dev/sgx_vepc", O_RDWR);
|
|
if (fd >= 0) {
|
|
close(fd);
|
|
|
|
type_register_static(&sgx_epc_backed_info);
|
|
}
|
|
}
|
|
|
|
type_init(register_types);
|