Re: [Qemu-devel] [RFC PATCH v0 4/8] spapr: Introduce CPU core device

[Andreas Färber]

Am 22.02.2016 um 06:01 schrieb Bharata B Rao:
> sPAPR CPU core device is a container of CPU thread devices. CPU hotplug is
> performed in the granularity of CPU core device by setting the "realized"
> property of this device to "true". When hotplugged, CPU core creates CPU
> thread devices.
> 
> TODO: Right now allows for only homogeneous configurations as we depend
> on global smp_threads and machine->cpu_model.
> 
> Signed-off-by: Bharata B Rao <address@hidden>
> ---
>  hw/ppc/Makefile.objs               |  1 +
>  hw/ppc/spapr_cpu_package.c         | 50 
> ++++++++++++++++++++++++++++++++++++++
>  include/hw/ppc/spapr_cpu_package.h | 26 ++++++++++++++++++++
>  3 files changed, 77 insertions(+)
>  create mode 100644 hw/ppc/spapr_cpu_package.c
>  create mode 100644 include/hw/ppc/spapr_cpu_package.h
> 
> diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs
> index c1ffc77..3000982 100644
> --- a/hw/ppc/Makefile.objs
> +++ b/hw/ppc/Makefile.objs
> @@ -4,6 +4,7 @@ obj-y += ppc.o ppc_booke.o
>  obj-$(CONFIG_PSERIES) += spapr.o spapr_vio.o spapr_events.o
>  obj-$(CONFIG_PSERIES) += spapr_hcall.o spapr_iommu.o spapr_rtas.o
>  obj-$(CONFIG_PSERIES) += spapr_pci.o spapr_rtc.o spapr_drc.o spapr_rng.o
> +obj-$(CONFIG_PSERIES) += spapr_cpu_package.o
>  ifeq ($(CONFIG_PCI)$(CONFIG_PSERIES)$(CONFIG_LINUX), yyy)
>  obj-y += spapr_pci_vfio.o
>  endif
> diff --git a/hw/ppc/spapr_cpu_package.c b/hw/ppc/spapr_cpu_package.c
> new file mode 100644
> index 0000000..3120a16
> --- /dev/null
> +++ b/hw/ppc/spapr_cpu_package.c
> @@ -0,0 +1,50 @@
> +/*
> + * sPAPR CPU package device, acts as container of CPU thread devices.
> + *
> + * Copyright (C) 2016 Bharata B Rao <address@hidden>
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
> + * See the COPYING file in the top-level directory.
> + */
> +#include "hw/cpu/package.h"
> +#include "hw/ppc/spapr_cpu_package.h"
> +#include "hw/boards.h"
> +#include <sysemu/cpus.h>
> +#include "qemu/error-report.h"
> +
> +static void spapr_cpu_package_instance_init(Object *obj)
> +{
> +    int i;
> +    CPUState *cpu;
> +    MachineState *machine = MACHINE(qdev_get_machine());
> +    sPAPRCPUPackage *package = SPAPR_CPU_PACKAGE(obj);
> +
> +    /* Create as many CPU threads as specified in the topology */
> +    for (i = 0; i < smp_threads; i++) {
> +        cpu = cpu_generic_init(machine->cpu_type, machine->cpu_model);

No, no, no. This is horribly violating QOM design.

Please compare the x86 RFC.

Andreas

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