Commit e674a49a authored by Christian Borntraeger's avatar Christian Borntraeger Committed by Alexander Graf
Browse files

s390: Move IPL code into a separate device 



Lets move the code to setup IPL for external kernel
or via the zipl rom into a separate file. This allows to

- define a reboot handler, setting up the PSW appropriately
- enhance the boot code to IPL disks that contain a bootmap that
  was created with zipl under LPAR or z/VM (future patch)
- reuse that code for several machines (e.g. virtio-ccw and virtio-s390)
- allow different machines to provide different defaults

Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarJens Freimann <jfrei@linux.vnet.ibm.com>
[agraf: symbolify initial psw, adjust header file location, fix for QOM]
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent ccb084d3

hw/s390-virtio.c

+10 −88
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ 
#include "boards.h"

#include "monitor/monitor.h"

#include "loader.h"

#include "elf.h"

#include "hw/virtio.h"

#include "hw/sysbus.h"

#include "sysemu/kvm.h"
@@ -48,17 +47,6 @@ 
#define KVM_S390_VIRTIO_RESET           1

#define KVM_S390_VIRTIO_SET_STATUS      2



#define KERN_IMAGE_START                0x010000UL

#define KERN_PARM_AREA                  0x010480UL

#define INITRD_START                    0x800000UL

#define INITRD_PARM_START               0x010408UL

#define INITRD_PARM_SIZE                0x010410UL

#define PARMFILE_START                  0x001000UL



#define ZIPL_START			0x009000UL

#define ZIPL_LOAD_ADDR			0x009000UL

#define ZIPL_FILENAME			"s390-zipl.rom"



#define MAX_BLK_DEVS                    10



static VirtIOS390Bus *s390_bus;
@@ -156,15 +144,10 @@ static void s390_init(QEMUMachineInitArgs *args) 
{

    ram_addr_t my_ram_size = args->ram_size;

    const char *cpu_model = args->cpu_model;

    const char *kernel_filename = args->kernel_filename;

    const char *kernel_cmdline = args->kernel_cmdline;

    const char *initrd_filename = args->initrd_filename;

    CPUS390XState *env = NULL;

    DeviceState *dev;

    MemoryRegion *sysmem = get_system_memory();

    MemoryRegion *ram = g_new(MemoryRegion, 1);

    ram_addr_t kernel_size = 0;

    ram_addr_t initrd_offset;

    ram_addr_t initrd_size = 0;

    int shift = 0;

    uint8_t *storage_keys;

    void *virtio_region;
@@ -185,6 +168,15 @@ static void s390_init(QEMUMachineInitArgs *args) 
    /* get a BUS */

    s390_bus = s390_virtio_bus_init(&my_ram_size);

    s390_sclp_init();

    dev  = qdev_create(NULL, "s390-ipl");

    if (args->kernel_filename) {

        qdev_prop_set_string(dev, "kernel", args->kernel_filename);

    }

    if (args->initrd_filename) {

        qdev_prop_set_string(dev, "initrd", args->initrd_filename);

    }

    qdev_prop_set_string(dev, "cmdline", args->kernel_cmdline);

    qdev_init_nofail(dev);



    /* allocate RAM */

    memory_region_init_ram(ram, "s390.ram", my_ram_size);
@@ -225,76 +217,6 @@ static void s390_init(QEMUMachineInitArgs *args) 
        tmp_env->storage_keys = storage_keys;

    }



    /* One CPU has to run */

    s390_add_running_cpu(env);



    if (kernel_filename) {



        kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, NULL,

                               NULL, 1, ELF_MACHINE, 0);

        if (kernel_size == -1UL) {

            kernel_size = load_image_targphys(kernel_filename, 0, ram_size);

        }

        if (kernel_size == -1UL) {

            fprintf(stderr, "qemu: could not load kernel '%s'\n",

                    kernel_filename);

            exit(1);

        }

        /*

         * we can not rely on the ELF entry point, since up to 3.2 this

         * value was 0x800 (the SALIPL loader) and it wont work. For

         * all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine.

         */

        env->psw.addr = KERN_IMAGE_START;

        env->psw.mask = 0x0000000180000000ULL;

    } else {

        ram_addr_t bios_size = 0;

        char *bios_filename;



        /* Load zipl bootloader */

        if (bios_name == NULL) {

            bios_name = ZIPL_FILENAME;

        }



        bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

        bios_size = load_image_targphys(bios_filename, ZIPL_LOAD_ADDR, 4096);

        g_free(bios_filename);



        if ((long)bios_size < 0) {

            hw_error("could not load bootloader '%s'\n", bios_name);

        }



        if (bios_size > 4096) {

            hw_error("stage1 bootloader is > 4k\n");

        }



        env->psw.addr = ZIPL_START;

        env->psw.mask = 0x0000000180000000ULL;

    }



    if (initrd_filename) {

        initrd_offset = INITRD_START;

        while (kernel_size + 0x100000 > initrd_offset) {

            initrd_offset += 0x100000;

        }

        initrd_size = load_image_targphys(initrd_filename, initrd_offset,

                                          ram_size - initrd_offset);

        if (initrd_size == -1UL) {

            fprintf(stderr, "qemu: could not load initrd '%s'\n",

                    initrd_filename);

            exit(1);

        }



        /* we have to overwrite values in the kernel image, which are "rom" */

        stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);

        stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);

    }



    if (rom_ptr(KERN_PARM_AREA)) {

        /* we have to overwrite values in the kernel image, which are "rom" */

        memcpy(rom_ptr(KERN_PARM_AREA), kernel_cmdline,

               strlen(kernel_cmdline) + 1);

    }



    /* Create VirtIO network adapters */

    for(i = 0; i < nb_nics; i++) {

hw/s390x/Makefile.objs

+1 −0
Original line number Diff line number Diff line
@@ -4,3 +4,4 @@ obj-y := $(addprefix ../,$(obj-y)) 
obj-y += sclp.o

obj-y += event-facility.o

obj-y += sclpquiesce.o sclpconsole.o

obj-y += ipl.o

hw/s390x/ipl.c

0 → 100644
+174 −0
Original line number Diff line number Diff line 
/*

 * bootloader support

 *

 * Copyright IBM, Corp. 2012

 *

 * Authors:

 *  Christian Borntraeger <borntraeger@de.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or (at your

 * option) any later version.  See the COPYING file in the top-level directory.

 *

 */



#include "sysemu/sysemu.h"

#include "cpu.h"

#include "elf.h"

#include "hw/loader.h"

#include "hw/sysbus.h"



#define KERN_IMAGE_START                0x010000UL

#define KERN_PARM_AREA                  0x010480UL

#define INITRD_START                    0x800000UL

#define INITRD_PARM_START               0x010408UL

#define INITRD_PARM_SIZE                0x010410UL

#define PARMFILE_START                  0x001000UL

#define ZIPL_FILENAME                   "s390-zipl.rom"

#define ZIPL_IMAGE_START                0x009000UL

#define IPL_PSW_MASK                    (PSW_MASK_32 | PSW_MASK_64)



#define TYPE_S390_IPL "s390-ipl"

#define S390_IPL(obj) \

    OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)

#if 0

#define S390_IPL_CLASS(klass) \

    OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL)

#define S390_IPL_GET_CLASS(obj) \

    OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL)

#endif



typedef struct S390IPLClass {

    /*< private >*/

    SysBusDeviceClass parent_class;

    /*< public >*/



    void (*parent_reset) (SysBusDevice *dev);

} S390IPLClass;



typedef struct S390IPLState {

    /*< private >*/

    SysBusDevice parent_obj;

    /*< public >*/



    char *kernel;

    char *initrd;

    char *cmdline;

} S390IPLState;





static void s390_ipl_cpu(uint64_t pswaddr)

{

    CPUS390XState *env = &S390_CPU(qemu_get_cpu(0))->env;

    env->psw.addr = pswaddr;

    env->psw.mask = IPL_PSW_MASK;

    s390_add_running_cpu(env);

}



static int s390_ipl_init(SysBusDevice *dev)

{

    S390IPLState *ipl = S390_IPL(dev);

    ram_addr_t kernel_size = 0;



    if (!ipl->kernel) {

        ram_addr_t bios_size = 0;

        char *bios_filename;



        /* Load zipl bootloader */

        if (bios_name == NULL) {

            bios_name = ZIPL_FILENAME;

        }



        bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

        bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 4096);

        g_free(bios_filename);



        if ((long)bios_size < 0) {

            hw_error("could not load bootloader '%s'\n", bios_name);

        }



        if (bios_size > 4096) {

            hw_error("stage1 bootloader is > 4k\n");

        }

        return 0;

    } else {

        kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, NULL,

                               NULL, 1, ELF_MACHINE, 0);

        if (kernel_size == -1UL) {

            kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);

        }

        if (kernel_size == -1UL) {

            fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel);

            return -1;

        }

        /* we have to overwrite values in the kernel image, which are "rom" */

        strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);

    }

    if (ipl->initrd) {

        ram_addr_t initrd_offset, initrd_size;



        initrd_offset = INITRD_START;

        while (kernel_size + 0x100000 > initrd_offset) {

            initrd_offset += 0x100000;

        }

        initrd_size = load_image_targphys(ipl->initrd, initrd_offset,

                                          ram_size - initrd_offset);

        if (initrd_size == -1UL) {

            fprintf(stderr, "qemu: could not load initrd '%s'\n", ipl->initrd);

            exit(1);

        }



        /* we have to overwrite values in the kernel image, which are "rom" */

        stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);

        stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);

    }



    return 0;

}



static Property s390_ipl_properties[] = {

    DEFINE_PROP_STRING("kernel", S390IPLState, kernel),

    DEFINE_PROP_STRING("initrd", S390IPLState, initrd),

    DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),

    DEFINE_PROP_END_OF_LIST(),

};



static void s390_ipl_reset(DeviceState *dev)

{

    S390IPLState *ipl = S390_IPL(dev);



    if (ipl->kernel) {

        /*

         * we can not rely on the ELF entry point, since up to 3.2 this

         * value was 0x800 (the SALIPL loader) and it wont work. For

         * all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine.

         */

        return s390_ipl_cpu(KERN_IMAGE_START);

    } else {

        return s390_ipl_cpu(ZIPL_IMAGE_START);

    }

}



static void s390_ipl_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);



    k->init = s390_ipl_init;

    dc->props = s390_ipl_properties;

    dc->reset = s390_ipl_reset;

    dc->no_user = 1;

}



static TypeInfo s390_ipl_info = {

    .class_init = s390_ipl_class_init,

    .parent = TYPE_SYS_BUS_DEVICE,

    .name  = "s390-ipl",

    .instance_size  = sizeof(S390IPLState),

};



static void s390_ipl_register_types(void)

{

    type_register_static(&s390_ipl_info);

}



type_init(s390_ipl_register_types)