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vl.c: move -m parsing after memory backends has been processed 

It will be possible for main RAM to come from memory-backend
and we should check that size specified in -m matches the size
of the backend and [MachineState::]ram_size also matches
backend's size.

However -m parsing (set_memory_options()) happens before backends
are intialized (object_create_delayed()) which complicates it.
Consolidate set_memory_options() and assigning parsed results to
current_machine after backends are initialized, so it would be
possible access the initialized backend instance to compare
sizes.

This patch only consolidates scattered places touching ram_size
within vl.c. And follow up patch will integrate backend handling
to set_memory_options().

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200219160953.13771-7-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:08:40 -05:00 committed by Patchew Importer
parent 6b61c2c596
commit a1b18df9a4
1 changed files with 14 additions and 13 deletions
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27
vl.c
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@ -2655,6 +2655,14 @@ static void set_memory_options(uint64_t *ram_slots, ram_addr_t *maxram_size,
exit(EXIT_FAILURE);
}
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);
}
}
loc_pop(&loc);
}
@ -3819,8 +3827,6 @@ int main(int argc, char **argv, char **envp)
machine_class = select_machine();
object_set_machine_compat_props(machine_class->compat_props);
set_memory_options(&ram_slots, &maxram_size, machine_class);
os_daemonize();
rcu_disable_atfork();
@ -4122,9 +4128,6 @@ int main(int argc, char **argv, char **envp)
machine_opts = qemu_get_machine_opts();
qemu_opt_foreach(machine_opts, machine_set_property, current_machine,
&error_fatal);
current_machine->ram_size = ram_size;
current_machine->maxram_size = maxram_size;
current_machine->ram_slots = ram_slots;
/*
* Note: uses machine properties such as kernel-irqchip, must run
@ -4235,14 +4238,6 @@ int main(int argc, char **argv, char **envp)
tpm_init();
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);
}
}
blk_mig_init();
ram_mig_init();
dirty_bitmap_mig_init();
@ -4287,6 +4282,12 @@ int main(int argc, char **argv, char **envp)
if (cpu_option) {
current_machine->cpu_type = parse_cpu_option(cpu_option);
}
set_memory_options(&ram_slots, &maxram_size, machine_class);
current_machine->ram_size = ram_size;
current_machine->maxram_size = maxram_size;
current_machine->ram_slots = ram_slots;
parse_numa_opts(current_machine);
if (machine_class->default_ram_id && current_machine->ram_size &&