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vl: separate qemu_resolve_machine_memdev 

This is a bit nasty: the machine is storing a string and later
resolving it.  We probably want to remove the memdev property
and instead make this a memory-set command.  "-M memdev" can be
handled a legacy option that is special cased by
machine_set_property.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-10-27 11:16:18 -04:00
parent 7a84268dc9
commit b24986e784
1 changed files with 37 additions and 33 deletions
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70
softmmu/vl.c
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@ -2846,6 +2846,42 @@ static bool have_custom_ram_size(void)
return !!qemu_opt_get_size(opts, "size", 0);
}
static void qemu_resolve_machine_memdev(void)
{
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);
if (!backend) {
error_report("Memory backend '%s' not found",
current_machine->ram_memdev_id);
exit(EXIT_FAILURE);
}
backend_size = object_property_get_uint(backend, "size", &error_abort);
if (have_custom_ram_size() && backend_size != ram_size) {
error_report("Size specified by -m option must match size of "
"explicitly specified 'memory-backend' property");
exit(EXIT_FAILURE);
}
if (mem_path) {
error_report("'-mem-path' can't be used together with"
"'-machine memory-backend'");
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) {
error_report("at most 2047 MB RAM can be simulated");
exit(1);
}
}
}
static void set_memory_options(MachineClass *mc)
{
uint64_t sz;
@ -4474,39 +4510,7 @@ void qemu_init(int argc, char **argv, char **envp)
current_machine->cpu_type = parse_cpu_option(cpu_option);
}
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);
if (!backend) {
error_report("Memory backend '%s' not found",
current_machine->ram_memdev_id);
exit(EXIT_FAILURE);
}
backend_size = object_property_get_uint(backend, "size", &error_abort);
if (have_custom_ram_size() && backend_size != ram_size) {
error_report("Size specified by -m option must match size of "
"explicitly specified 'memory-backend' property");
exit(EXIT_FAILURE);
}
if (mem_path) {
error_report("'-mem-path' can't be used together with"
"'-machine memory-backend'");
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) {
error_report("at most 2047 MB RAM can be simulated");
exit(1);
}
}
qemu_resolve_machine_memdev();
parse_numa_opts(current_machine);
/* do monitor/qmp handling at preconfig state if requested */