This patch adds an optional function pointer, 'elf_note_fn', to load_elf() which causes load_elf() to additionally parse any ELF program headers of type PT_NOTE and check to see if the ELF Note is of the type specified by the 'translate_opaque' arg. If a matching ELF Note is found then the specfied function pointer is called to process the ELF note. Passing a NULL function pointer results in ELF Notes being skipped. The first consumer of this functionality is the PVHboot support which needs to read the XEN_ELFNOTE_PHYS32_ENTRY ELF Note while loading the uncompressed kernel binary in order to discover the boot entry address for the x86/HVM direct boot ABI. Signed-off-by: Liam Merwick <liam.merwick@oracle.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
657 lines
19 KiB
C
657 lines
19 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/boards.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 "hw/s390x/ebcdic.h"
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#include "ipl.h"
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#include "qemu/error-report.h"
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#include "qemu/config-file.h"
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#include "qemu/cutils.h"
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#include "qemu/option.h"
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#include "exec/exec-all.h"
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#define KERN_IMAGE_START 0x010000UL
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#define LINUX_MAGIC_ADDR 0x010008UL
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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 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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uint32_t *ipl_psw;
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uint64_t pentry;
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char *magic;
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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, NULL,
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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, NULL,
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&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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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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/* if this is Linux use KERN_IMAGE_START */
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magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
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if (magic && !memcmp(magic, "S390EP", 6)) {
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pentry = KERN_IMAGE_START;
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} else {
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/* if not Linux load the address of the (short) IPL PSW */
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ipl_psw = rom_ptr(4, 4);
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if (ipl_psw) {
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pentry = be32_to_cpu(*ipl_psw) & 0x7fffffffUL;
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} else {
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error_setg(&err, "Could not get IPL PSW");
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goto error;
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}
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}
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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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char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
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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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if (parm_area) {
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strcpy(parm_area, ipl->cmdline);
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}
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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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uint64_t *romptr;
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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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romptr = rom_ptr(INITRD_PARM_START, 16);
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if (romptr) {
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stq_p(romptr, initrd_offset);
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stq_p(romptr + 1, initrd_size);
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}
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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_STRING("netboot_fw", S390IPLState, netboot_fw),
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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 void s390_ipl_set_boot_menu(S390IPLState *ipl)
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{
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QemuOptsList *plist = qemu_find_opts("boot-opts");
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QemuOpts *opts = QTAILQ_FIRST(&plist->head);
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uint8_t *flags = &ipl->qipl.qipl_flags;
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uint32_t *timeout = &ipl->qipl.boot_menu_timeout;
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const char *tmp;
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unsigned long splash_time = 0;
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if (!get_boot_device(0)) {
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if (boot_menu) {
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error_report("boot menu requires a bootindex to be specified for "
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"the IPL device");
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}
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return;
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}
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switch (ipl->iplb.pbt) {
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case S390_IPL_TYPE_CCW:
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/* In the absence of -boot menu, use zipl parameters */
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if (!qemu_opt_get(opts, "menu")) {
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*flags |= QIPL_FLAG_BM_OPTS_ZIPL;
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return;
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}
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break;
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case S390_IPL_TYPE_QEMU_SCSI:
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break;
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default:
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if (boot_menu) {
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error_report("boot menu is not supported for this device type");
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}
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return;
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}
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if (!boot_menu) {
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return;
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}
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*flags |= QIPL_FLAG_BM_OPTS_CMD;
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tmp = qemu_opt_get(opts, "splash-time");
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if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
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error_report("splash-time is invalid, forcing it to 0");
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*timeout = 0;
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return;
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}
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if (splash_time > 0xffffffff) {
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error_report("splash-time is too large, forcing it to max value");
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*timeout = 0xffffffff;
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return;
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}
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*timeout = cpu_to_be32(splash_time);
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}
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static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
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{
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CcwDevice *ccw_dev = NULL;
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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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if (virtio_ccw_dev) {
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ccw_dev = CCW_DEVICE(virtio_ccw_dev);
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} else {
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SCSIDevice *sd = (SCSIDevice *)
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object_dynamic_cast(OBJECT(dev_st),
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TYPE_SCSI_DEVICE);
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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,
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vdev);
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ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
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TYPE_CCW_DEVICE);
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}
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}
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}
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return ccw_dev;
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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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CcwDevice *ccw_dev = NULL;
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dev_st = get_boot_device(0);
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if (dev_st) {
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ccw_dev = s390_get_ccw_device(dev_st);
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}
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/*
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* Currently allow IPL only from CCW devices.
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*/
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if (ccw_dev) {
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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 (sd) {
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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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} else {
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VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
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TYPE_VIRTIO_NET);
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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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if (vn) {
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ipl->netboot = true;
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}
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}
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if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
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ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
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}
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return true;
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}
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return false;
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}
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int s390_ipl_set_loadparm(uint8_t *loadparm)
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{
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MachineState *machine = MACHINE(qdev_get_machine());
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char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
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if (lp) {
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int i;
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/* lp is an uppercase string without leading/embedded spaces */
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for (i = 0; i < 8 && lp[i]; i++) {
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loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
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}
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if (i < 8) {
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memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
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}
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g_free(lp);
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return 0;
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}
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return -1;
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}
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static int load_netboot_image(Error **errp)
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{
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S390IPLState *ipl = get_ipl_device();
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char *netboot_filename;
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MemoryRegion *sysmem = get_system_memory();
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MemoryRegion *mr = NULL;
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void *ram_ptr = NULL;
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int img_size = -1;
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mr = memory_region_find(sysmem, 0, 1).mr;
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if (!mr) {
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error_setg(errp, "Failed to find memory region at address 0");
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return -1;
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}
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ram_ptr = memory_region_get_ram_ptr(mr);
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if (!ram_ptr) {
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error_setg(errp, "No RAM found");
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goto unref_mr;
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}
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netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
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if (netboot_filename == NULL) {
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error_setg(errp, "Could not find network bootloader '%s'",
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ipl->netboot_fw);
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goto unref_mr;
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}
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img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
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&ipl->start_addr,
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NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
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if (img_size < 0) {
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img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
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ipl->start_addr = KERN_IMAGE_START;
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}
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if (img_size < 0) {
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error_setg(errp, "Failed to load network bootloader");
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}
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g_free(netboot_filename);
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unref_mr:
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memory_region_unref(mr);
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return img_size;
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}
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static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
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int virtio_id)
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{
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uint8_t cssid;
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uint8_t ssid;
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uint16_t devno;
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uint16_t schid;
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SubchDev *sch = NULL;
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if (iplb->pbt != S390_IPL_TYPE_CCW) {
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return false;
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}
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devno = be16_to_cpu(iplb->ccw.devno);
|
|
ssid = iplb->ccw.ssid & 3;
|
|
|
|
for (schid = 0; schid < MAX_SCHID; schid++) {
|
|
for (cssid = 0; cssid < MAX_CSSID; cssid++) {
|
|
sch = css_find_subch(1, cssid, ssid, schid);
|
|
|
|
if (sch && sch->devno == devno) {
|
|
return sch->id.cu_model == virtio_id;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool is_virtio_net_device(IplParameterBlock *iplb)
|
|
{
|
|
return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
|
|
}
|
|
|
|
static bool is_virtio_scsi_device(IplParameterBlock *iplb)
|
|
{
|
|
return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
|
|
}
|
|
|
|
void s390_ipl_update_diag308(IplParameterBlock *iplb)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
|
|
ipl->iplb = *iplb;
|
|
ipl->iplb_valid = true;
|
|
ipl->netboot = is_virtio_net_device(iplb);
|
|
}
|
|
|
|
IplParameterBlock *s390_ipl_get_iplb(void)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
|
|
if (!ipl->iplb_valid) {
|
|
return NULL;
|
|
}
|
|
return &ipl->iplb;
|
|
}
|
|
|
|
void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
|
|
if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
|
|
/* use CPU 0 for full resets */
|
|
ipl->reset_cpu_index = 0;
|
|
} else {
|
|
ipl->reset_cpu_index = cs->cpu_index;
|
|
}
|
|
ipl->reset_type = reset_type;
|
|
|
|
if (reset_type == S390_RESET_REIPL &&
|
|
ipl->iplb_valid &&
|
|
!ipl->netboot &&
|
|
ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
|
|
is_virtio_scsi_device(&ipl->iplb)) {
|
|
CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0));
|
|
|
|
if (ccw_dev &&
|
|
cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
|
|
(ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
|
|
/*
|
|
* this is the original boot device's SCSI
|
|
* so restore IPL parameter info from it
|
|
*/
|
|
ipl->iplb_valid = s390_gen_initial_iplb(ipl);
|
|
}
|
|
}
|
|
if (reset_type == S390_RESET_MODIFIED_CLEAR ||
|
|
reset_type == S390_RESET_LOAD_NORMAL) {
|
|
/* ignore -no-reboot, send no event */
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
|
|
} else {
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
|
|
}
|
|
/* as this is triggered by a CPU, make sure to exit the loop */
|
|
if (tcg_enabled()) {
|
|
cpu_loop_exit(cs);
|
|
}
|
|
}
|
|
|
|
void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
|
|
*cs = qemu_get_cpu(ipl->reset_cpu_index);
|
|
if (!*cs) {
|
|
/* use any CPU */
|
|
*cs = first_cpu;
|
|
}
|
|
*reset_type = ipl->reset_type;
|
|
}
|
|
|
|
void s390_ipl_clear_reset_request(void)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
|
|
ipl->reset_type = S390_RESET_EXTERNAL;
|
|
/* use CPU 0 for full resets */
|
|
ipl->reset_cpu_index = 0;
|
|
}
|
|
|
|
static void s390_ipl_prepare_qipl(S390CPU *cpu)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
uint8_t *addr;
|
|
uint64_t len = 4096;
|
|
|
|
addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
|
|
if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
|
|
error_report("Cannot set QEMU IPL parameters");
|
|
return;
|
|
}
|
|
memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
|
|
cpu_physical_memory_unmap(addr, len, 1, len);
|
|
}
|
|
|
|
void s390_ipl_prepare_cpu(S390CPU *cpu)
|
|
{
|
|
S390IPLState *ipl = get_ipl_device();
|
|
Error *err = NULL;
|
|
|
|
cpu->env.psw.addr = ipl->start_addr;
|
|
cpu->env.psw.mask = IPL_PSW_MASK;
|
|
|
|
if (!ipl->kernel || ipl->iplb_valid) {
|
|
cpu->env.psw.addr = ipl->bios_start_addr;
|
|
if (!ipl->iplb_valid) {
|
|
ipl->iplb_valid = s390_gen_initial_iplb(ipl);
|
|
}
|
|
}
|
|
if (ipl->netboot) {
|
|
if (load_netboot_image(&err) < 0) {
|
|
error_report_err(err);
|
|
exit(1);
|
|
}
|
|
ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
|
|
}
|
|
s390_ipl_set_boot_menu(ipl);
|
|
s390_ipl_prepare_qipl(cpu);
|
|
}
|
|
|
|
static void s390_ipl_reset(DeviceState *dev)
|
|
{
|
|
S390IPLState *ipl = S390_IPL(dev);
|
|
|
|
if (ipl->reset_type != S390_RESET_REIPL) {
|
|
ipl->iplb_valid = false;
|
|
memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
|
|
}
|
|
}
|
|
|
|
static void s390_ipl_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->realize = s390_ipl_realize;
|
|
dc->props = s390_ipl_properties;
|
|
dc->reset = s390_ipl_reset;
|
|
dc->vmsd = &vmstate_ipl;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
/* Reason: Loads the ROMs and thus can only be used one time - internally */
|
|
dc->user_creatable = false;
|
|
}
|
|
|
|
static const TypeInfo s390_ipl_info = {
|
|
.class_init = s390_ipl_class_init,
|
|
.parent = TYPE_DEVICE,
|
|
.name = TYPE_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)
|