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e7e0d52dc6
The e500plat machine device plug callback currently calls platform_bus_link_device() for any sysbus device. This is overly broad, because platform_bus_link_device() will unconditionally grab the IRQs and MMIOs of the device it is passed, whether it was intended for the platform bus or not. Restrict hotpluggability of sysbus devices to only those devices on the dynamic sysbus allowlist. We were mostly getting away with this because the board creates the platform bus as the last device it creates, and so the hotplug callback did not do anything for all the sysbus devices created by the board itself. However if the user plugged in a device which itself uses a sysbus device internally we would have mishandled this and probably asserted. An example of this is: qemu-system-ppc64 -M ppce500 -device macio-oldworld This isn't a sensible command because the macio-oldworld device is really specific to the 'g3beige' machine, but we now fail with a reasonable error message rather than asserting: qemu-system-ppc64: Device heathrow is not supported by this machine yet. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Eric Auger <eric.auger@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-id: 20210325153310.9131-5-peter.maydell@linaro.org
123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/*
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* Generic device-tree-driven paravirt PPC e500 platform
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*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "e500.h"
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#include "hw/net/fsl_etsec/etsec.h"
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#include "sysemu/device_tree.h"
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#include "sysemu/kvm.h"
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#include "hw/sysbus.h"
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#include "hw/pci/pci.h"
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#include "hw/ppc/openpic.h"
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#include "kvm_ppc.h"
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static void e500plat_fixup_devtree(void *fdt)
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{
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const char model[] = "QEMU ppce500";
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const char compatible[] = "fsl,qemu-e500";
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qemu_fdt_setprop(fdt, "/", "model", model, sizeof(model));
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qemu_fdt_setprop(fdt, "/", "compatible", compatible,
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sizeof(compatible));
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}
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static void e500plat_init(MachineState *machine)
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{
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PPCE500MachineClass *pmc = PPCE500_MACHINE_GET_CLASS(machine);
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/* Older KVM versions don't support EPR which breaks guests when we announce
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MPIC variants that support EPR. Revert to an older one for those */
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if (kvm_enabled() && !kvmppc_has_cap_epr()) {
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pmc->mpic_version = OPENPIC_MODEL_FSL_MPIC_20;
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}
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ppce500_init(machine);
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}
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static void e500plat_machine_device_plug_cb(HotplugHandler *hotplug_dev,
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DeviceState *dev, Error **errp)
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{
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PPCE500MachineState *pms = PPCE500_MACHINE(hotplug_dev);
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if (pms->pbus_dev) {
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MachineClass *mc = MACHINE_GET_CLASS(pms);
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if (device_is_dynamic_sysbus(mc, dev)) {
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platform_bus_link_device(pms->pbus_dev, SYS_BUS_DEVICE(dev));
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}
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}
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}
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static
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HotplugHandler *e500plat_machine_get_hotpug_handler(MachineState *machine,
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DeviceState *dev)
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{
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MachineClass *mc = MACHINE_GET_CLASS(machine);
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if (device_is_dynamic_sysbus(mc, dev)) {
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return HOTPLUG_HANDLER(machine);
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}
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return NULL;
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}
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#define TYPE_E500PLAT_MACHINE MACHINE_TYPE_NAME("ppce500")
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static void e500plat_machine_class_init(ObjectClass *oc, void *data)
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{
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PPCE500MachineClass *pmc = PPCE500_MACHINE_CLASS(oc);
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HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
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MachineClass *mc = MACHINE_CLASS(oc);
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assert(!mc->get_hotplug_handler);
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mc->get_hotplug_handler = e500plat_machine_get_hotpug_handler;
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hc->plug = e500plat_machine_device_plug_cb;
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pmc->pci_first_slot = 0x1;
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pmc->pci_nr_slots = PCI_SLOT_MAX - 1;
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pmc->fixup_devtree = e500plat_fixup_devtree;
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pmc->mpic_version = OPENPIC_MODEL_FSL_MPIC_42;
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pmc->has_mpc8xxx_gpio = true;
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pmc->has_platform_bus = true;
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pmc->platform_bus_base = 0xf00000000ULL;
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pmc->platform_bus_size = 128 * MiB;
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pmc->platform_bus_first_irq = 5;
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pmc->platform_bus_num_irqs = 10;
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pmc->ccsrbar_base = 0xFE0000000ULL;
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pmc->pci_pio_base = 0xFE1000000ULL;
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pmc->pci_mmio_base = 0xC00000000ULL;
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pmc->pci_mmio_bus_base = 0xE0000000ULL;
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pmc->spin_base = 0xFEF000000ULL;
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mc->desc = "generic paravirt e500 platform";
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mc->init = e500plat_init;
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mc->max_cpus = 32;
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mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("e500v2_v30");
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mc->default_ram_id = "mpc8544ds.ram";
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machine_class_allow_dynamic_sysbus_dev(mc, TYPE_ETSEC_COMMON);
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}
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static const TypeInfo e500plat_info = {
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.name = TYPE_E500PLAT_MACHINE,
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.parent = TYPE_PPCE500_MACHINE,
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.class_init = e500plat_machine_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_HOTPLUG_HANDLER },
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{ }
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}
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};
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static void e500plat_register_types(void)
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{
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type_register_static(&e500plat_info);
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}
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type_init(e500plat_register_types)
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