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vl.c: ensure that ram_size matches size of machine.memory-backend 

Extend set_memory_options() to check that size specified by -m
matches the size of backend pointed by memory-backend.
And in case of -m was omitted adjust ram_size to match that
of explicitly provided backend.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200219160953.13771-8-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:08:41 -05:00 committed by Patchew Importer
parent a1b18df9a4
commit fe64d06afc
1 changed files with 15 additions and 0 deletions
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15
vl.c
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@ -2655,6 +2655,21 @@ static void set_memory_options(uint64_t *ram_slots, ram_addr_t *maxram_size,
exit(EXIT_FAILURE);
}
if (current_machine->ram_memdev_id) {
Object *backend;
ram_addr_t backend_size;
backend = object_resolve_path_type(current_machine->ram_memdev_id,
TYPE_MEMORY_BACKEND, NULL);
backend_size = object_property_get_uint(backend, "size", &error_abort);
if (mem_str && backend_size != ram_size) {
error_report("Size specified by -m option must match size of "
"explicitly specified 'memory-backend' property");
exit(EXIT_FAILURE);
}
ram_size = backend_size;
}
if (!xen_enabled()) {
/* On 32-bit hosts, QEMU is limited by virtual address space */
if (ram_size > (2047 << 20) && HOST_LONG_BITS == 32) {