commit
33cd52b5d7b9adfd009e95f07e6c64dd88ae2a31 unset
cannot_instantiate_with_device_add_yet in TYPE_SYSBUS, making all
sysbus devices appear on "-device help" and lack the "no-user"
flag in "info qdm".
To fix this, we can set user_creatable=false by default on
TYPE_SYS_BUS_DEVICE, but this requires setting
user_creatable=true explicitly on the sysbus devices that
actually work with -device.
Fortunately today we have just a few has_dynamic_sysbus=1
machines: virt, pc-q35-*, ppce500, and spapr.
virt, ppce500, and spapr have extra checks to ensure just a few
device types can be instantiated:
* virt supports only TYPE_VFIO_CALXEDA_XGMAC, TYPE_VFIO_AMD_XGBE.
* ppce500 supports only TYPE_ETSEC_COMMON.
* spapr supports only TYPE_SPAPR_PCI_HOST_BRIDGE.
This patch sets user_creatable=true explicitly on those 4 device
classes.
Now, the more complex cases:
pc-q35-*: q35 has no sysbus device whitelist yet (which is a
separate bug). We are in the process of fixing it and building a
sysbus whitelist on q35, but in the meantime we can fix the
"-device help" and "info qdm" bugs mentioned above. Also, despite
not being strictly necessary for fixing the q35 bug, reducing the
list of user_creatable=true devices will help us be more
confident when building the q35 whitelist.
xen: We also have a hack at xen_set_dynamic_sysbus(), that sets
has_dynamic_sysbus=true at runtime when using the Xen
accelerator. This hack is only used to allow xen-backend devices
to be dynamically plugged/unplugged.
This means today we can use -device with the following 22 device
types, that are the ones compiled into the qemu-system-x86_64 and
qemu-system-i386 binaries:
* allwinner-ahci
* amd-iommu
* cfi.pflash01
* esp
* fw_cfg_io
* fw_cfg_mem
* generic-sdhci
* hpet
* intel-iommu
* ioapic
* isabus-bridge
* kvmclock
* kvm-ioapic
* kvmvapic
* SUNW,fdtwo
* sysbus-ahci
* sysbus-fdc
* sysbus-ohci
* unimplemented-device
* virtio-mmio
* xen-backend
* xen-sysdev
This patch adds user_creatable=true explicitly to those devices,
temporarily, just to keep 100% compatibility with existing
behavior of q35. Subsequent patches will remove
user_creatable=true from the devices that are really not meant to
user-creatable on any machine, and remove the FIXME comment from
the ones that are really supposed to be user-creatable. This is
being done in separate patches because we still don't have an
obvious list of devices that will be whitelisted by q35, and I
would like to get each device reviewed individually.
Cc: Alexander Graf <agraf@suse.de>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Beniamino Galvani <b.galvani@gmail.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Frank Blaschka <frank.blaschka@de.ibm.com>
Cc: Gabriel L. Somlo <somlo@cmu.edu>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: John Snow <jsnow@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Pierre Morel <pmorel@linux.vnet.ibm.com>
Cc: Prasad J Pandit <pjp@fedoraproject.org>
Cc: qemu-arm@nongnu.org
Cc: qemu-block@nongnu.org
Cc: qemu-ppc@nongnu.org
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rob Herring <robh@kernel.org>
Cc: Shannon Zhao <zhaoshenglong@huawei.com>
Cc: sstabellini@kernel.org
Cc: Thomas Huth <thuth@redhat.com>
Cc: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Acked-by: John Snow <jsnow@redhat.com>
Acked-by: Juergen Gross <jgross@suse.com>
Acked-by: Marcel Apfelbaum <marcel@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <
20170503203604.31462-3-ehabkost@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[ehabkost: Small changes at sysbus_device_class_init() comments]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
dc->props = sysbus_fdc_properties;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo sysbus_fdc_info = {
dc->props = sun4m_fdc_properties;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo sun4m_fdc_info = {
dc->props = pflash_cfi01_properties;
dc->vmsd = &vmstate_pflash;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
DeviceClass *k = DEVICE_CLASS(klass);
k->init = sysbus_device_init;
k->bus_type = TYPE_SYSTEM_BUS;
+ /*
+ * device_add plugs devices into a suitable bus. For "real" buses,
+ * that actually connects the device. For sysbus, the connections
+ * need to be made separately, and device_add can't do that. The
+ * device would be left unconnected, and will probably not work
+ *
+ * However, a few machines can handle device_add/-device with
+ * a few specific sysbus devices. In those cases, the device
+ * subclass needs to override it and set user_creatable=true.
+ */
+ k->user_creatable = false;
}
static const TypeInfo sysbus_device_type_info = {
dc->vmsd = &vmstate_amdvi;
dc->hotpluggable = false;
dc_class->realize = amdvi_realize;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo amdvi = {
dc->hotpluggable = false;
x86_class->realize = vtd_realize;
x86_class->int_remap = vtd_int_remap;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo vtd_info = {
dc->realize = kvmclock_realize;
dc->vmsd = &kvmclock_vmsd;
dc->props = kvmclock_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo kvmclock_info = {
k->post_load = kvm_ioapic_put;
dc->reset = kvm_ioapic_reset;
dc->props = kvm_ioapic_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo kvm_ioapic_info = {
dc->reset = vapic_reset;
dc->vmsd = &vmstate_vapic;
dc->realize = vapic_realize;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo vapic_type = {
dc->props = sysbus_ahci_properties;
dc->reset = sysbus_ahci_reset;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo sysbus_ahci_info = {
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_allwinner_ahci;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo allwinner_ahci_info = {
k->post_load = ioapic_update_kvm_routes;
dc->reset = ioapic_reset_common;
dc->props = ioapic_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo ioapic_info = {
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->fw_name = "isa";
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo isabus_bridge_info = {
dc->realize = unimp_realize;
dc->props = unimp_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo unimp_info = {
dc->realize = etsec_realize;
dc->reset = etsec_reset;
dc->props = etsec_properties;
+ /* Supported by ppce500 machine */
+ dc->user_creatable = true;
}
static TypeInfo etsec_info = {
dc->realize = fw_cfg_io_realize;
dc->props = fw_cfg_io_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo fw_cfg_io_info = {
dc->realize = fw_cfg_mem_realize;
dc->props = fw_cfg_mem_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo fw_cfg_mem_info = {
dc->props = spapr_phb_properties;
dc->reset = spapr_phb_reset;
dc->vmsd = &vmstate_spapr_pci;
+ /* Supported by TYPE_SPAPR_MACHINE */
+ dc->user_creatable = true;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
hp->plug = spapr_phb_hot_plug_child;
hp->unplug = spapr_phb_hot_unplug_child;
dc->reset = sysbus_esp_hard_reset;
dc->vmsd = &vmstate_sysbus_esp_scsi;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo sysbus_esp_info = {
dc->props = sdhci_sysbus_properties;
dc->realize = sdhci_sysbus_realize;
dc->reset = sdhci_poweron_reset;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo sdhci_sysbus_info = {
dc->reset = hpet_reset;
dc->vmsd = &vmstate_hpet;
dc->props = hpet_device_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo hpet_device_info = {
dc->desc = "OHCI USB Controller";
dc->props = ohci_sysbus_properties;
dc->reset = usb_ohci_reset_sysbus;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo ohci_sysbus_info = {
dc->realize = amd_xgbe_realize;
dc->desc = "VFIO AMD XGBE";
dc->vmsd = &vfio_platform_amd_xgbe_vmstate;
+ /* Supported by TYPE_VIRT_MACHINE */
+ dc->user_creatable = true;
}
static const TypeInfo vfio_amd_xgbe_dev_info = {
dc->realize = calxeda_xgmac_realize;
dc->desc = "VFIO Calxeda XGMAC";
dc->vmsd = &vfio_platform_calxeda_xgmac_vmstate;
+ /* Supported by TYPE_VIRT_MACHINE */
+ dc->user_creatable = true;
}
static const TypeInfo vfio_calxeda_xgmac_dev_info = {
dc->reset = virtio_mmio_reset;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
dc->props = virtio_mmio_properties;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo virtio_mmio_info = {
dc->props = xendev_properties;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo xendev_type_info = {
k->init = xen_sysdev_init;
dc->props = xen_sysdev_properties;
dc->bus_type = TYPE_XENSYSBUS;
+ /*
+ * FIXME: Set only because we are not sure yet if this device
+ * will be outside the q35 sysbus whitelist.
+ */
+ dc->user_creatable = true;
}
static const TypeInfo xensysdev_info = {