337 lines
10 KiB
C
337 lines
10 KiB
C
/*
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* bootloader support
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*
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* Copyright IBM, Corp. 2012
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*
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* Authors:
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* Christian Borntraeger <borntraeger@de.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at your
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* option) any later version. See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "sysemu/sysemu.h"
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#include "cpu.h"
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#include "elf.h"
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#include "hw/loader.h"
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#include "hw/s390x/virtio-ccw.h"
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#include "hw/s390x/css.h"
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#include "ipl.h"
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#define KERN_IMAGE_START 0x010000UL
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#define KERN_PARM_AREA 0x010480UL
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#define INITRD_START 0x800000UL
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#define INITRD_PARM_START 0x010408UL
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#define INITRD_PARM_SIZE 0x010410UL
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#define PARMFILE_START 0x001000UL
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#define ZIPL_IMAGE_START 0x009000UL
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#define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
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static bool iplb_extended_needed(void *opaque)
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{
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S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
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return ipl->iplbext_migration;
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}
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static const VMStateDescription vmstate_iplb_extended = {
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.name = "ipl/iplb_extended",
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.version_id = 0,
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.minimum_version_id = 0,
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.needed = iplb_extended_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_iplb = {
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.name = "ipl/iplb",
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.version_id = 0,
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.minimum_version_id = 0,
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.fields = (VMStateField[]) {
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VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
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VMSTATE_UINT16(devno, IplParameterBlock),
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VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
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VMSTATE_END_OF_LIST()
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},
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.subsections = (const VMStateDescription*[]) {
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&vmstate_iplb_extended,
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NULL
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}
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};
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static const VMStateDescription vmstate_ipl = {
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.name = "ipl",
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.version_id = 0,
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.minimum_version_id = 0,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64(compat_start_addr, S390IPLState),
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VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
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VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
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VMSTATE_BOOL(iplb_valid, S390IPLState),
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VMSTATE_UINT8(cssid, S390IPLState),
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VMSTATE_UINT8(ssid, S390IPLState),
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VMSTATE_UINT16(devno, S390IPLState),
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VMSTATE_END_OF_LIST()
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}
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};
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static S390IPLState *get_ipl_device(void)
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{
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return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
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}
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static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
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{
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uint64_t dstaddr = *(uint64_t *) opaque;
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/*
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* Assuming that our s390-ccw.img was linked for starting at address 0,
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* we can simply add the destination address for the final location
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*/
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return srcaddr + dstaddr;
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}
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static void s390_ipl_realize(DeviceState *dev, Error **errp)
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{
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S390IPLState *ipl = S390_IPL(dev);
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uint64_t pentry = KERN_IMAGE_START;
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int kernel_size;
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Error *err = NULL;
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int bios_size;
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char *bios_filename;
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/*
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* Always load the bios if it was enforced,
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* even if an external kernel has been defined.
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*/
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if (!ipl->kernel || ipl->enforce_bios) {
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uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
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if (bios_name == NULL) {
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bios_name = ipl->firmware;
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}
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bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
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if (bios_filename == NULL) {
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error_setg(&err, "could not find stage1 bootloader");
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goto error;
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}
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bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase,
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&ipl->bios_start_addr, NULL, NULL, 1,
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EM_S390, 0, 0);
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if (bios_size > 0) {
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/* Adjust ELF start address to final location */
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ipl->bios_start_addr += fwbase;
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} else {
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/* Try to load non-ELF file */
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bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
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4096);
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ipl->bios_start_addr = ZIPL_IMAGE_START;
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}
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g_free(bios_filename);
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if (bios_size == -1) {
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error_setg(&err, "could not load bootloader '%s'", bios_name);
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goto error;
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}
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/* default boot target is the bios */
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ipl->start_addr = ipl->bios_start_addr;
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}
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if (ipl->kernel) {
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kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL,
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NULL, 1, EM_S390, 0, 0);
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if (kernel_size < 0) {
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kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
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}
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if (kernel_size < 0) {
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error_setg(&err, "could not load kernel '%s'", ipl->kernel);
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goto error;
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}
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/*
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* Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
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* kernel parameters here as well. Note: For old kernels (up to 3.2)
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* we can not rely on the ELF entry point - it was 0x800 (the SALIPL
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* loader) and it won't work. For this case we force it to 0x10000, too.
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*/
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if (pentry == KERN_IMAGE_START || pentry == 0x800) {
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ipl->start_addr = KERN_IMAGE_START;
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/* Overwrite parameters in the kernel image, which are "rom" */
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strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
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} else {
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ipl->start_addr = pentry;
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}
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if (ipl->initrd) {
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ram_addr_t initrd_offset;
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int initrd_size;
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initrd_offset = INITRD_START;
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while (kernel_size + 0x100000 > initrd_offset) {
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initrd_offset += 0x100000;
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}
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initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
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ram_size - initrd_offset);
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if (initrd_size == -1) {
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error_setg(&err, "could not load initrd '%s'", ipl->initrd);
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goto error;
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}
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/*
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* we have to overwrite values in the kernel image,
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* which are "rom"
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*/
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stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);
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stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
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}
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}
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/*
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* Don't ever use the migrated values, they could come from a different
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* BIOS and therefore don't work. But still migrate the values, so
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* QEMUs relying on it don't break.
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*/
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ipl->compat_start_addr = ipl->start_addr;
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ipl->compat_bios_start_addr = ipl->bios_start_addr;
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qemu_register_reset(qdev_reset_all_fn, dev);
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error:
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error_propagate(errp, err);
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}
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static Property s390_ipl_properties[] = {
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DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
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DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
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DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
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DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
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DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
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DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
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true),
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DEFINE_PROP_END_OF_LIST(),
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};
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static bool s390_gen_initial_iplb(S390IPLState *ipl)
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{
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DeviceState *dev_st;
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dev_st = get_boot_device(0);
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if (dev_st) {
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VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
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object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
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TYPE_VIRTIO_CCW_DEVICE);
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SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
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TYPE_SCSI_DEVICE);
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if (virtio_ccw_dev) {
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CcwDevice *ccw_dev = CCW_DEVICE(virtio_ccw_dev);
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ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
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ipl->iplb.blk0_len =
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cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
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ipl->iplb.pbt = S390_IPL_TYPE_CCW;
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ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
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ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
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return true;
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} else if (sd) {
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SCSIBus *bus = scsi_bus_from_device(sd);
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VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
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VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, vdev);
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CcwDevice *ccw_dev = CCW_DEVICE(scsi_ccw);
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ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
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ipl->iplb.blk0_len =
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cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
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ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
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ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
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ipl->iplb.scsi.target = cpu_to_be16(sd->id);
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ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
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ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
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ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
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return true;
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}
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}
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return false;
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}
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void s390_ipl_update_diag308(IplParameterBlock *iplb)
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{
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S390IPLState *ipl = get_ipl_device();
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ipl->iplb = *iplb;
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ipl->iplb_valid = true;
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}
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IplParameterBlock *s390_ipl_get_iplb(void)
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{
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S390IPLState *ipl = get_ipl_device();
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if (!ipl->iplb_valid) {
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return NULL;
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}
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return &ipl->iplb;
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}
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void s390_reipl_request(void)
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{
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S390IPLState *ipl = get_ipl_device();
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ipl->reipl_requested = true;
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qemu_system_reset_request();
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}
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void s390_ipl_prepare_cpu(S390CPU *cpu)
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{
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S390IPLState *ipl = get_ipl_device();
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cpu->env.psw.addr = ipl->start_addr;
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cpu->env.psw.mask = IPL_PSW_MASK;
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if (!ipl->kernel || ipl->iplb_valid) {
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cpu->env.psw.addr = ipl->bios_start_addr;
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if (!ipl->iplb_valid) {
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ipl->iplb_valid = s390_gen_initial_iplb(ipl);
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}
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}
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}
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static void s390_ipl_reset(DeviceState *dev)
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{
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S390IPLState *ipl = S390_IPL(dev);
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if (!ipl->reipl_requested) {
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ipl->iplb_valid = false;
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memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
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}
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ipl->reipl_requested = false;
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}
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static void s390_ipl_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->realize = s390_ipl_realize;
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dc->props = s390_ipl_properties;
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dc->reset = s390_ipl_reset;
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dc->vmsd = &vmstate_ipl;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static const TypeInfo s390_ipl_info = {
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.class_init = s390_ipl_class_init,
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.parent = TYPE_DEVICE,
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.name = TYPE_S390_IPL,
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.instance_size = sizeof(S390IPLState),
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};
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static void s390_ipl_register_types(void)
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{
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type_register_static(&s390_ipl_info);
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}
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type_init(s390_ipl_register_types)
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