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hw/acpi/ich9: Add compat prop to keep HPC bit set for 6.1 machine type

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To solve issues [1-2] the Hot Plug Capable bit in PCIe Slots will be
turned on, while the switch to ACPI Hot-plug will be done in the
DSDT table.

Introducing 'x-keep-native-hpc' property disables the HPC bit only
in 6.1 and as a result keeps the forced 'reserve-io' on
pcie-root-ports in 6.1 too.

[1] https://gitlab.com/qemu-project/qemu/-/issues/641
[2] https://bugzilla.redhat.com/show_bug.cgi?id=2006409

Signed-off-by: Julia Suvorova <jusual@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20211112110857.3116853-3-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Julia Suvorova 2021-11-12 06:08:54 -05:00 • committed by Michael S. Tsirkin
parent 2aa1842d6d
commit c318bef762
4 changed files with 27 additions and 1 deletions
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18
hw/acpi/ich9.c
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@ -419,6 +419,20 @@ static void ich9_pm_set_acpi_pci_hotplug(Object *obj, bool value, Error **errp)
s->pm.use_acpi_hotplug_bridge = value;
}
static bool ich9_pm_get_keep_pci_slot_hpc(Object *obj, Error **errp)
{
ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
return s->pm.keep_pci_slot_hpc;
}
static void ich9_pm_set_keep_pci_slot_hpc(Object *obj, bool value, Error **errp)
{
ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
s->pm.keep_pci_slot_hpc = value;
}
void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
{
static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN;
@ -428,6 +442,7 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
pm->disable_s4 = 0;
pm->s4_val = 2;
pm->use_acpi_hotplug_bridge = true;
pm->keep_pci_slot_hpc = true;
object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE,
&pm->pm_io_base, OBJ_PROP_FLAG_READ);
@ -454,6 +469,9 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
object_property_add_bool(obj, ACPI_PM_PROP_ACPI_PCIHP_BRIDGE,
ich9_pm_get_acpi_pci_hotplug,
ich9_pm_set_acpi_pci_hotplug);
object_property_add_bool(obj, "x-keep-pci-slot-hpc",
ich9_pm_get_keep_pci_slot_hpc,
ich9_pm_set_keep_pci_slot_hpc);
}
void ich9_pm_device_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,