From e674a49aae8b79bc4ea07f1bcd666bbf28b12a27 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 18 Dec 2012 07:50:57 +0000 Subject: [PATCH] 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: Christian Borntraeger Signed-off-by: Jens Freimann [agraf: symbolify initial psw, adjust header file location, fix for QOM] Signed-off-by: Alexander Graf --- hw/s390-virtio.c | 98 +++-------------------- hw/s390x/Makefile.objs | 1 + hw/s390x/ipl.c | 174 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 185 insertions(+), 88 deletions(-) create mode 100644 hw/s390x/ipl.c diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c index 0e93cc3641..13f93fbd24 100644 --- a/hw/s390-virtio.c +++ b/hw/s390-virtio.c @@ -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++) { diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs index 096dfcd6a1..4a5a5d8cba 100644 --- a/hw/s390x/Makefile.objs +++ b/hw/s390x/Makefile.objs @@ -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 diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c new file mode 100644 index 0000000000..7cbbf99fde --- /dev/null +++ b/hw/s390x/ipl.c @@ -0,0 +1,174 @@ +/* + * bootloader support + * + * Copyright IBM, Corp. 2012 + * + * Authors: + * Christian Borntraeger + * + * 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)