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