The existing has_dynamic_sysbus flag makes the machine accept every user-creatable sysbus device type on the command-line. Replace it with a list of allowed device types, so machines can easily accept some sysbus devices while rejecting others.
To keep exactly the same behavior as before, the existing has_dynamic_sysbus=true assignments are replaced with a TYPE_SYS_BUS_DEVICE entry on the allowed list. Other patches will replace the TYPE_SYS_BUS_DEVICE entries with more specific lists of devices. Cc: Peter Maydell <peter.mayd...@linaro.org> Cc: Marcel Apfelbaum <mar...@redhat.com> Cc: "Michael S. Tsirkin" <m...@redhat.com> Cc: Alexander Graf <ag...@suse.de> Cc: David Gibson <da...@gibson.dropbear.id.au> Cc: Stefano Stabellini <sstabell...@kernel.org> Cc: Anthony Perard <anthony.per...@citrix.com> Cc: qemu-...@nongnu.org Cc: qemu-...@nongnu.org Cc: xen-devel@lists.xenproject.org Signed-off-by: Eduardo Habkost <ehabk...@redhat.com> --- Changes v1 -> v2: * Replace "dynamic sysbus whitelist" with "allowed sysbus devices" * Simply add TYPE_SYS_BUS_DEVICE to the list on existing has_dynamic_sysbus=true machines, and make machine-types more strict in separate patches --- include/hw/boards.h | 5 ++++- hw/arm/virt.c | 3 ++- hw/core/machine.c | 43 +++++++++++++++++++++++++++++-------------- hw/i386/pc_q35.c | 3 ++- hw/ppc/e500plat.c | 4 +++- hw/ppc/spapr.c | 3 ++- hw/xen/xen_backend.c | 7 ++++++- 7 files changed, 48 insertions(+), 20 deletions(-) diff --git a/include/hw/boards.h b/include/hw/boards.h index 156b16f7a6..041bc08971 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -76,6 +76,9 @@ void machine_set_cpu_numa_node(MachineState *machine, const CpuInstanceProperties *props, Error **errp); +void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type); + + /** * CPUArchId: * @arch_id - architecture-dependent CPU ID of present or possible CPU @@ -179,7 +182,6 @@ struct MachineClass { no_floppy:1, no_cdrom:1, no_sdcard:1, - has_dynamic_sysbus:1, pci_allow_0_address:1, legacy_fw_cfg_order:1; int is_default; @@ -197,6 +199,7 @@ struct MachineClass { bool ignore_memory_transaction_failures; int numa_mem_align_shift; const char **valid_cpu_types; + strList *allowed_dynamic_sysbus_devices; bool auto_enable_numa_with_memhp; void (*numa_auto_assign_ram)(MachineClass *mc, NodeInfo *nodes, int nb_nodes, ram_addr_t size); diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 9e18b410d7..fa6dc15fcd 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1591,7 +1591,8 @@ static void virt_machine_class_init(ObjectClass *oc, void *data) * configuration of the particular instance. */ mc->max_cpus = 255; - mc->has_dynamic_sysbus = true; + /*TODO: allow only sysbus devices that really work with this machine */ + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_SYS_BUS_DEVICE); mc->block_default_type = IF_VIRTIO; mc->no_cdrom = 1; mc->pci_allow_0_address = true; diff --git a/hw/core/machine.c b/hw/core/machine.c index 36c2fb069c..ab2ec292f3 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -335,29 +335,44 @@ static bool machine_get_enforce_config_section(Object *obj, Error **errp) return ms->enforce_config_section; } -static void error_on_sysbus_device(SysBusDevice *sbdev, void *opaque) +void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type) { - error_report("Option '-device %s' cannot be handled by this machine", - object_class_get_name(object_get_class(OBJECT(sbdev)))); - exit(1); + strList *item = g_new0(strList, 1); + + item->value = g_strdup(type); + item->next = mc->allowed_dynamic_sysbus_devices; + mc->allowed_dynamic_sysbus_devices = item; } -static void machine_init_notify(Notifier *notifier, void *data) +static void validate_sysbus_device(SysBusDevice *sbdev, void *opaque) { - Object *machine = qdev_get_machine(); - ObjectClass *oc = object_get_class(machine); - MachineClass *mc = MACHINE_CLASS(oc); + MachineState *machine = opaque; + MachineClass *mc = MACHINE_GET_CLASS(machine); + bool allowed = false; + strList *wl; - if (mc->has_dynamic_sysbus) { - /* Our machine can handle dynamic sysbus devices, we're all good */ - return; + for (wl = mc->allowed_dynamic_sysbus_devices; + !allowed && wl; + wl = wl->next) { + allowed |= !!object_dynamic_cast(OBJECT(sbdev), wl->value); } + if (!allowed) { + error_report("Option '-device %s' cannot be handled by this machine", + object_class_get_name(object_get_class(OBJECT(sbdev)))); + exit(1); + } +} + +static void machine_init_notify(Notifier *notifier, void *data) +{ + MachineState *machine = MACHINE(qdev_get_machine()); + /* - * Loop through all dynamically created devices and check whether there - * are sysbus devices among them. If there are, error out. + * Loop through all dynamically created sysbus devices and check if they are + * all allowed. If a device is not allowed, error out. */ - foreach_dynamic_sysbus_device(error_on_sysbus_device, NULL); + foreach_dynamic_sysbus_device(validate_sysbus_device, machine); } HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine) diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index d6060043ac..d0b0e5b422 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -299,7 +299,8 @@ static void pc_q35_machine_options(MachineClass *m) m->default_machine_opts = "firmware=bios-256k.bin"; m->default_display = "std"; m->no_floppy = 1; - m->has_dynamic_sysbus = true; + /*TODO: allow only sysbus devices that really work with this machine */ + machine_class_allow_dynamic_sysbus_dev(m, TYPE_SYS_BUS_DEVICE); m->max_cpus = 288; } diff --git a/hw/ppc/e500plat.c b/hw/ppc/e500plat.c index e59e80fb9e..438118c29b 100644 --- a/hw/ppc/e500plat.c +++ b/hw/ppc/e500plat.c @@ -15,6 +15,7 @@ #include "hw/boards.h" #include "sysemu/device_tree.h" #include "sysemu/kvm.h" +#include "hw/sysbus.h" #include "hw/pci/pci.h" #include "hw/ppc/openpic.h" #include "kvm_ppc.h" @@ -63,7 +64,8 @@ static void e500plat_machine_init(MachineClass *mc) mc->desc = "generic paravirt e500 platform"; mc->init = e500plat_init; mc->max_cpus = 32; - mc->has_dynamic_sysbus = true; + /*TODO: allow only sysbus devices that really work with this machine */ + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_SYS_BUS_DEVICE); mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("e500v2_v30"); } diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index d682f013d4..82040cc5d1 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -3603,7 +3603,8 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data) mc->default_boot_order = ""; mc->default_ram_size = 512 * M_BYTE; mc->kvm_type = spapr_kvm_type; - mc->has_dynamic_sysbus = true; + /*TODO: allow only sysbus devices that really work with this machine */ + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_SYS_BUS_DEVICE); mc->pci_allow_0_address = true; mc->get_hotplug_handler = spapr_get_hotplug_handler; hc->pre_plug = spapr_machine_device_pre_plug; diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c index 0f849a26d2..82380ea9ee 100644 --- a/hw/xen/xen_backend.c +++ b/hw/xen/xen_backend.c @@ -564,7 +564,12 @@ static void xen_set_dynamic_sysbus(void) ObjectClass *oc = object_get_class(machine); MachineClass *mc = MACHINE_CLASS(oc); - mc->has_dynamic_sysbus = true; + /* + * Emulate old mc->has_dynamic_sysbus=true assignment + * + *TODO: add only Xen devices to the list + */ + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_SYS_BUS_DEVICE); } int xen_be_register(const char *type, struct XenDevOps *ops) -- 2.13.6 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel