Commit ece09bee authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Peter Maydell
Browse files

aspeed: introduce a configurable number of CPU per machine 



The current models of the Aspeed SoCs only have one CPU but future
ones will support SMP. Introduce a new num_cpus field at the SoC class
level to define the number of available CPUs per SoC and also
introduce a 'num-cpus' property to activate the CPUs configured for
the machine.

The max_cpus limit of the machine should depend on the SoC definition
but, unfortunately, these values are not available when the machine
class is initialized. This is the reason why we add a check on
num_cpus in the AspeedSoC realize handler.

SMP support will be activated when models for such SoCs are implemented.

Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Reviewed-by: default avatarJoel Stanley <joel@jms.id.au>
Message-id: 20190618165311.27066-6-clg@kaod.org
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 75fb4577

hw/arm/aspeed.c

+5 −2
Original line number Diff line number Diff line
@@ -22,13 +22,13 @@ 
#include "hw/misc/tmp105.h"

#include "qemu/log.h"

#include "sysemu/block-backend.h"

#include "sysemu/sysemu.h"

#include "hw/loader.h"

#include "qemu/error-report.h"

#include "qemu/units.h"



static struct arm_boot_info aspeed_board_binfo = {

    .board_id = -1, /* device-tree-only board */

    .nb_cpus = 1,

};



struct AspeedBoardState {
@@ -171,6 +171,8 @@ static void aspeed_board_init(MachineState *machine, 
                            &error_abort);

    object_property_set_int(OBJECT(&bmc->soc), cfg->num_cs, "num-cs",

                            &error_abort);

    object_property_set_int(OBJECT(&bmc->soc), smp_cpus, "num-cpus",

                            &error_abort);

    if (machine->kernel_filename) {

        /*

         * When booting with a -kernel command line there is no u-boot
@@ -230,6 +232,7 @@ static void aspeed_board_init(MachineState *machine, 
    aspeed_board_binfo.kernel_cmdline = machine->kernel_cmdline;

    aspeed_board_binfo.ram_size = ram_size;

    aspeed_board_binfo.loader_start = sc->info->memmap[ASPEED_SDRAM];

    aspeed_board_binfo.nb_cpus = bmc->soc.num_cpus;



    if (cfg->i2c_init) {

        cfg->i2c_init(bmc);
@@ -326,7 +329,7 @@ static void aspeed_machine_class_init(ObjectClass *oc, void *data) 


    mc->desc = board->desc;

    mc->init = aspeed_machine_init;

    mc->max_cpus = 1;

    mc->max_cpus = ASPEED_CPUS_NUM;

    mc->no_sdcard = 1;

    mc->no_floppy = 1;

    mc->no_cdrom = 1;

hw/arm/aspeed_soc.c

+27 −6
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include "hw/char/serial.h"

#include "qemu/log.h"

#include "qemu/module.h"

#include "qemu/error-report.h"

#include "hw/i2c/aspeed_i2c.h"

#include "net/net.h"
@@ -123,6 +124,7 @@ static const AspeedSoCInfo aspeed_socs[] = { 
        .wdts_num     = 2,

        .irqmap       = aspeed_soc_ast2400_irqmap,

        .memmap       = aspeed_soc_ast2400_memmap,

        .num_cpus     = 1,

    }, {

        .name         = "ast2400-a1",

        .cpu_type     = ARM_CPU_TYPE_NAME("arm926"),
@@ -134,6 +136,7 @@ static const AspeedSoCInfo aspeed_socs[] = { 
        .wdts_num     = 2,

        .irqmap       = aspeed_soc_ast2400_irqmap,

        .memmap       = aspeed_soc_ast2400_memmap,

        .num_cpus     = 1,

    }, {

        .name         = "ast2400",

        .cpu_type     = ARM_CPU_TYPE_NAME("arm926"),
@@ -145,6 +148,7 @@ static const AspeedSoCInfo aspeed_socs[] = { 
        .wdts_num     = 2,

        .irqmap       = aspeed_soc_ast2400_irqmap,

        .memmap       = aspeed_soc_ast2400_memmap,

        .num_cpus     = 1,

    }, {

        .name         = "ast2500-a1",

        .cpu_type     = ARM_CPU_TYPE_NAME("arm1176"),
@@ -156,6 +160,7 @@ static const AspeedSoCInfo aspeed_socs[] = { 
        .wdts_num     = 3,

        .irqmap       = aspeed_soc_ast2500_irqmap,

        .memmap       = aspeed_soc_ast2500_memmap,

        .num_cpus     = 1,

    },

};
@@ -172,8 +177,11 @@ static void aspeed_soc_init(Object *obj) 
    AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);

    int i;



    object_initialize_child(obj, "cpu", OBJECT(&s->cpu), sizeof(s->cpu),

                            sc->info->cpu_type, &error_abort, NULL);

    for (i = 0; i < sc->info->num_cpus; i++) {

        object_initialize_child(obj, "cpu[*]", OBJECT(&s->cpu[i]),

                                sizeof(s->cpu[i]), sc->info->cpu_type,

                                &error_abort, NULL);

    }



    sysbus_init_child_obj(obj, "scu", OBJECT(&s->scu), sizeof(s->scu),

                          TYPE_ASPEED_SCU);
@@ -241,12 +249,20 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp) 
    create_unimplemented_device("aspeed_soc.io", sc->info->memmap[ASPEED_IOMEM],

                                ASPEED_SOC_IOMEM_SIZE);



    if (s->num_cpus > sc->info->num_cpus) {

        warn_report("%s: invalid number of CPUs %d, using default %d",

                    sc->info->name, s->num_cpus, sc->info->num_cpus);

        s->num_cpus = sc->info->num_cpus;

    }



    /* CPU */

    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);

    for (i = 0; i < s->num_cpus; i++) {

        object_property_set_bool(OBJECT(&s->cpu[i]), true, "realized", &err);

        if (err) {

            error_propagate(errp, err);

            return;

        }

    }



    /* SRAM */

    memory_region_init_ram(&s->sram, OBJECT(dev), "aspeed.sram",
@@ -380,6 +396,10 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp) 
    sysbus_connect_irq(SYS_BUS_DEVICE(&s->ftgmac100), 0,

                       aspeed_soc_get_irq(s, ASPEED_ETH1));

}

static Property aspeed_soc_properties[] = {

    DEFINE_PROP_UINT32("num-cpus", AspeedSoCState, num_cpus, 0),

    DEFINE_PROP_END_OF_LIST(),

};



static void aspeed_soc_class_init(ObjectClass *oc, void *data)

{
@@ -390,6 +410,7 @@ static void aspeed_soc_class_init(ObjectClass *oc, void *data) 
    dc->realize = aspeed_soc_realize;

    /* Reason: Uses serial_hds and nd_table in realize() directly */

    dc->user_creatable = false;

    dc->props = aspeed_soc_properties;

}



static const TypeInfo aspeed_soc_type_info = {

include/hw/arm/aspeed_soc.h

+4 −1
Original line number Diff line number Diff line
@@ -24,13 +24,15 @@ 


#define ASPEED_SPIS_NUM  2

#define ASPEED_WDTS_NUM  3

#define ASPEED_CPUS_NUM  2



typedef struct AspeedSoCState {

    /*< private >*/

    DeviceState parent;



    /*< public >*/

    ARMCPU cpu;

    ARMCPU cpu[ASPEED_CPUS_NUM];

    uint32_t num_cpus;

    MemoryRegion sram;

    AspeedVICState vic;

    AspeedRtcState rtc;
@@ -58,6 +60,7 @@ typedef struct AspeedSoCInfo { 
    int wdts_num;

    const int *irqmap;

    const hwaddr *memmap;

    uint32_t num_cpus;

} AspeedSoCInfo;



typedef struct AspeedSoCClass {