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hw/mips/malta: turn off x86 specific features of PIIX4_PM

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QEMU crashes trying to save VMSTATE when only MIPS target are compiled in
  $ qemu-system-mips -monitor stdio
  (qemu) migrate "exec:gzip -c > STATEFILE.gz"
  Segmentation fault (core dumped)

It happens due to PIIX4_PM trying to parse hotplug vmstate structures
which are valid only for x86 and not for MIPS (as it requires ACPI
tables support which is not existent for ithe later)

Issue was probably exposed by trying to cleanup/compile out unused
ACPI bits from MIPS target (but forgetting about migration bits).

Disable compiled out features using compat properties as the least
risky way to deal with issue.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/995
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20220728115034.1327988-1-imammedo@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Igor Mammedov 2022-07-28 07:50:34 -04:00 committed by Philippe Mathieu-Daudé
parent 8809baf4e4
commit bd64c210ce
1 changed files with 9 additions and 0 deletions
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9
hw/mips/malta.c
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@ -1442,6 +1442,14 @@ static const TypeInfo mips_malta_device = {
.instance_init = mips_malta_instance_init,
};
GlobalProperty malta_compat[] = {
{ "PIIX4_PM", "memory-hotplug-support", "off" },
{ "PIIX4_PM", "acpi-pci-hotplug-with-bridge-support", "off" },
{ "PIIX4_PM", "acpi-root-pci-hotplug", "off" },
{ "PIIX4_PM", "x-not-migrate-acpi-index", "true" },
};
const size_t malta_compat_len = G_N_ELEMENTS(malta_compat);
static void mips_malta_machine_init(MachineClass *mc)
{
mc->desc = "MIPS Malta Core LV";
@ -1455,6 +1463,7 @@ static void mips_malta_machine_init(MachineClass *mc)
mc->default_cpu_type = MIPS_CPU_TYPE_NAME("24Kf");
#endif
mc->default_ram_id = "mips_malta.ram";
compat_props_add(mc->compat_props, malta_compat, malta_compat_len);
}
DEFINE_MACHINE("malta", mips_malta_machine_init)