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/*
* Memory manager for remote device
*
* Copyright © 2018, 2021 Oracle and/or its affiliates.
*
* 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 "qemu/osdep.h"
#include "qemu-common.h"
#include "hw/remote/memory.h"
#include "exec/address-spaces.h"
#include "exec/ram_addr.h"
#include "qapi/error.h"
static void remote_sysmem_reset(void)
{
MemoryRegion *sysmem, *subregion, *next;
sysmem = get_system_memory();
QTAILQ_FOREACH_SAFE(subregion, &sysmem->subregions, subregions_link, next) {
if (subregion->ram) {
memory_region_del_subregion(sysmem, subregion);
object_unparent(OBJECT(subregion));
}
}
}
void remote_sysmem_reconfig(MPQemuMsg *msg, Error **errp)
{
ERRP_GUARD();
SyncSysmemMsg *sysmem_info = &msg->data.sync_sysmem;
MemoryRegion *sysmem, *subregion;
static unsigned int suffix;
int region;
sysmem = get_system_memory();
remote_sysmem_reset();
for (region = 0; region < msg->num_fds; region++) {
g_autofree char *name;
subregion = g_new(MemoryRegion, 1);
name = g_strdup_printf("remote-mem-%u", suffix++);
memory_region_init_ram_from_fd(subregion, NULL,
name, sysmem_info->sizes[region],
true, msg->fds[region],
sysmem_info->offsets[region],
errp);
if (*errp) {
g_free(subregion);
remote_sysmem_reset();
return;
}
memory_region_add_subregion(sysmem, sysmem_info->gpas[region],
subregion);
}
}
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