Commit Graph

51 Commits

Author SHA1 Message Date
Thomas Huth
d08a649404 pc-bios/s390-ccw/bootmap: Silence compiler warning from Clang
When compiling the s390-ccw bios with Clang, the compiler complains:

 pc-bios/s390-ccw/bootmap.c:302:9: warning: logical not is only applied
  to the left hand side of this comparison [-Wlogical-not-parentheses]
    if (!mbr->dev_type == DEV_TYPE_ECKD) {
        ^              ~~

The code works (more or less by accident), since dev_type can only be
0 or 1, but it's better of course to use the intended != operator here
instead.

Fixes: 5dc739f343 ("Allow booting in case the first virtio-blk disk is bad")
Message-Id: <20210421163331.358178-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2021-05-09 18:14:31 +02:00
Marc Hartmayer
a6625d38cc pc-bios/s390-ccw: don't try to read the next block if end of chunk is reached
Don't read the block if a null block number is reached, because this means that
the end of chunk is reached.

Reviewed-by: Collin Walling <walling@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Message-Id: <20210416074736.17409-1-mhartmay@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2021-05-09 18:14:31 +02:00
Janosch Frank
42ab98e7d7 pc-bios: s390x: Use reset PSW if avaliable
If a blob provides a reset PSW then we should use it instead of
branching to the PSW address and using our own mask.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201006094249.50640-4-frankja@linux.ibm.com>
[thuth: Use Elvis operator to shorten long line]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-06 20:14:17 +02:00
Janosch Frank
4906a4e41c pc-bios: s390x: Fix bootmap.c zipl component entry data handling
The two main types of zipl component entries are execute and
load/data. The last member of the component entry struct therefore
denotes either a PSW or an address. Let's make this a bit more clear
by introducing a union and cleaning up the code that uses that struct
member.

The execute type component entries written by zipl contain short PSWs,
not addresses. Let's mask them and only pass the address part to
jump_to_IPL_code(uint64_t address) because it expects an address as
visible by the name of the argument.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201006094249.50640-2-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-06 19:57:35 +02:00
Marc Hartmayer
468184ec90 pc-bios/s390-ccw: break loop if a null block number is reached
Break the loop if `cur_block_nr` is a null block number because this
means that the end of chunk is reached. In this case we will try to
boot the default entry.

Fixes: ba831b2526 ("s390-ccw: read stage2 boot loader data to find menu")
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Message-Id: <20200924085926.21709-3-mhartmay@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-06 19:57:34 +02:00
Marc Hartmayer
5f97ba0c74 pc-bios/s390-ccw: fix off-by-one error
This error takes effect when the magic value "zIPL" is located at the
end of a block. For example if s2_cur_blk = 0x7fe18000 and the magic
value "zIPL" is located at 0x7fe18ffc - 0x7fe18fff.

Fixes: ba831b2526 ("s390-ccw: read stage2 boot loader data to find menu")
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Message-Id: <20200924085926.21709-2-mhartmay@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[thuth: Use "<= ... - 4" instead of "< ... - 3"]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-06 19:56:56 +02:00
Thomas Huth
5dc739f343 pc-bios/s390-ccw: Allow booting in case the first virtio-blk disk is bad
If you try to boot with two virtio-blk disks (without bootindex), and
only the second one is bootable, the s390-ccw bios currently stops at
the first disk and does not continue booting from the second one. This
is annoying - and all other major QEMU firmwares succeed to boot from
the second disk in this case, so we should do the same in the s390-ccw
bios, too.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200806105349.632-8-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-10-06 19:36:50 +02:00
Janosch Frank
78182aea78 pc-bios: s390x: Use ebcdic2ascii table
Why should we do conversion of a ebcdic value if we have a handy table
where we could look up the ascii value instead?

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200624075226.92728-10-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-07-02 10:00:42 +02:00
Jason J. Herne
2497b4a3c0 s390-bios: Skip bootmap signature entries
Newer versions of zipl have the ability to write signature entries to the boot
script for secure boot. We don't yet support secure boot, but we need to skip
over signature entries while reading the boot script in order to maintain our
ability to boot guest operating systems that have a secure bootloader.

Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <1556543381-12671-1-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2019-05-08 10:52:14 +02:00
Thomas Huth
9a848adf45 pc-bios/s390-ccw/net: Use diag308 to reset machine before jumping to the OS
The netboot firmware so far simply jumped directly into the OS kernel
after the download has been completed. This, however, bears the risk
that the virtio-net device still might be active in the background and
incoming packets are still placed into the buffers - which could destroy
memory of the now-running Linux kernel in case it did not take over the
device fast enough. Also the SCLP console is not put into a well-defined
state here. We should hand over the system in a clean state when jumping
into the kernel, so let's use the same mechanism as it's done in the
main s390-ccw firmware and reset the machine with diag308 into a clean
state before jumping into the OS kernel code. To be able to share the
code with the main s390-ccw firmware, the related functions are now
extracted from bootmap.c into a new file called jump2ipl.c.

Since we now also set the boot device schid at address 184 for the network
boot device, this patch also slightly changes the way how we detect the
entry points for non-ELF binary images: The code now looks for the "S390EP"
magic first and then jumps to 0x10000 in case it has been found. This is
necessary for booting from network devices, since the normal kernel code
(where the PSW at ddress 0 points to) tries to do a block load from the
boot device. This of course fails for a virtio-net device and causes the
kernel to abort with a panic-PSW silently.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-05-02 11:27:14 +02:00
Collin Walling
622b391780 pc-bios/s390-ccw: fix non-sequential boot entries (enum)
zIPL boot menu entries can be non-sequential. Let's account
for this issue for the s390 enumerated boot menu. Since we
can no longer print a range of available entries to the
user, we have to present a list of each available entry.

An example of this menu:

  s390-ccw Enumerated Boot Menu.

   [0] default

   [1]
   [2]
   [7]
   [8]
   [9]
  [11]
  [12]

  Please choose:

Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reported-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-05-02 11:27:14 +02:00
Collin Walling
6df2a829df pc-bios/s390-ccw: rename MAX_TABLE_ENTRIES to MAX_BOOT_ENTRIES
The MAX_TABLE_ENTRIES constant has a name that is too generic. As we
want to declare a limit for boot menu entries, let's rename it to a more
fitting MAX_BOOT_ENTRIES and set its value to 31 (30 boot entries and
1 default entry). Also we move it from bootmap.h to s390-ccw.h to make
it available for menu.c in a later patch.

Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-05-02 11:27:14 +02:00
Viktor Mihajlovski
e8c7ef288a s390: Do not pass inofficial IPL type to the guest
IPL over a virtio-scsi device requires special handling not
available in the real architecture. For this purpose the IPL
type 0xFF has been chosen as means of communication between
QEMU and the pc-bios. However, a guest OS could be confused
by seeing an unknown IPL type.

This change sets the IPL parameter type to 0x02 (CCW) to prevent
this. Pre-existing Linux has looked up the IPL parameters only in
the case of FCP IPL. This means that the behavior should stay
the same even if Linux checks for the IPL type unconditionally.

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Message-Id: <1522940844-12336-4-git-send-email-mihajlov@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-04-09 13:50:31 +02:00
Thomas Huth
6af978ae8b pc-bios/s390-ccw: Move string arrays from bootmap header to .c file
bootmap.h can currently only be included once - otherwise the linker
complains about multiple definitions of the "magic" strings. It's a
bad style to define string arrays in header files, so let's better
move these to the bootmap.c file instead where they are used.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1520317081-5341-1-git-send-email-thuth@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-03-08 15:49:23 +01:00
Collin L. Walling
ffb4a1c807 s390-ccw: interactive boot menu for scsi
Interactive boot menu for scsi. This follows a similar procedure
as the interactive menu for eckd dasd. An example follows:

    s390x Enumerated Boot Menu.

    3 entries detected. Select from index 0 to 2.

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[thuth: Added additional "break;" statement to avoid analyzer warnings]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-02-26 07:56:55 +01:00
Collin L. Walling
ba831b2526 s390-ccw: read stage2 boot loader data to find menu
Read the stage2 boot loader data block-by-block. We scan the
current block for the string "zIPL" to detect the start of the
boot menu banner. We then load the adjacent blocks (previous
block and next block) to account for the possibility of menu
data spanning multiple blocks.

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-02-26 07:56:55 +01:00
Collin L. Walling
fc0e208774 s390-ccw: update libc
Moved:
  memcmp from bootmap.h to libc.h (renamed from _memcmp)
  strlen from sclp.c to libc.h (renamed from _strlen)

Added C standard functions:
  isdigit

Added non C-standard function:
  uitoa
  atoui

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-02-26 07:56:54 +01:00
Collin L. Walling
ac4c5958b1 s390-ccw: refactor IPL structs
ECKD DASDs have different IPL structures for CDL and LDL
formats. The current Ipl1 and Ipl2 structs follow the CDL
format, so we prepend "EckdCdl" to them. Boot info for LDL
has been moved to a new struct: EckdLdlIpl1.

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-02-26 07:56:54 +01:00
Collin L. Walling
80beedcc38 s390-ccw: refactor eckd_block_num to use CHS
Add new cylinder/head/sector struct. Use it to calculate
eckd block numbers instead of a BootMapPointer (which used
eckd chs anyway).

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-02-26 07:56:54 +01:00
Collin L. Walling
5340eb072f s390-ccw: refactor boot map table code
Some ECKD bootmap code was using structs designed for SCSI.
Even though this works, it confuses readability. Add a new
BootMapTable struct to assist with readability in bootmap
entry code. Also:

- replace ScsiMbr in ECKD code with appropriate structs
- fix read_block messages to reflect BootMapTable
- fixup ipl_scsi to use BootMapTable (referred to as Program Table)
- defined value for maximum table entries

Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-02-26 07:56:54 +01:00
Thomas Huth
824df3b84b pc-bios/s390-ccw: Move byteswap functions to a separate header
We'll need them in code that is not related to bootmap.h, so
they should reside in an independent header.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-6-git-send-email-thuth@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-07-14 12:29:48 +02:00
Thomas Huth
90806fec99 pc-bios/s390-ccw: Move libc functions to separate header
The upcoming netboot code will use the libc from SLOF. To be able
to still use s390-ccw.h there, the libc related functions in this
header have to be moved to a different location.
And while we're at it, remove the duplicate memcpy() function from
sclp.c.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-2-git-send-email-thuth@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-07-14 12:29:48 +02:00
Eugene (jno) Dvurechenski
7a9762bf89 pc-bios/s390-ccw: add boot entry selection to El Torito routine
If there is no LOADPARM given or '0' specified, then IPL the first
matched entry. Otherwise IPL the matching entry of that number.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02 15:08:54 +02:00
Farhan Ali
82ca394194 pc-bios/s390-ccw: add boot entry selection for ECKD DASD
1. change a bit definition of ScsiMbr to allow an array of pointers
2. add loadparm fetch to boot script processing
3. apply loadparm index to boot entry selection, if any

Initial patch from Eugene (jno) Dvurechenski.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02 15:08:54 +02:00
Farhan Ali
9dd7823b70 pc-bios/s390-ccw: provide entry selection on LOADPARM for SCSI disk
Fix SCSI bootmap interpreter to make use of any specified entry of the
Program Table using the leftmost numeric value from the LOADPARM, if specified.

Initial patch from Eugene (jno) Dvurechenski.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02 15:08:54 +02:00
Farhan Ali
99b72e0fbb pc-bios/s390-ccw: Use the ccw bios to start the network boot
We want to use the ccw bios to start final network boot. To do
this we use ccw bios to detect if the boot device is a virtio
network device and retrieve the start address of the
network boot image.

Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-02-28 12:04:48 +01:00
Eugene (jno) Dvurechenski
688e697fa4 pc-bios/s390-ccw: disambiguation of "No zIPL magic" message
Don't indicate the same error message for different conditions.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23 16:13:38 +01:00
Eugene (jno) Dvurechenski
f038682044 pc-bios/s390-ccw: enhance bootmap detection
Improve the algorithm that tries to guess the disk layout:
1. Use CD-ROMs to read ISO only
2. Make explicit paths for -scsi and -blk virtio

Acked-by: Maxim Samoylov <max7255@linux.vnet.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23 16:13:38 +01:00
Eugene (jno) Dvurechenski
c9262e8a84 pc-bios/s390-ccw: virtio_panic -> panic
This function has nothing to do with virtio.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23 16:13:38 +01:00
Eugene (jno) Dvurechenski
b1be0972f9 pc-bios/s390-ccw: add more disk layout checks
Experiments showed possibility of few more "misconfigurations" in disk
layout. They are reported now.

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-23 16:13:38 +01:00
Eugene (jno) Dvurechenski
3a3c752f0b pc-bios/s390-ccw: fix old bug in ptr increment
We need to increment by the size of the structure, whereas 'ns' is 'uint8_t *'.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-10 10:37:16 +01:00
Maxim Samoylov
869648e87e pc-bios/s390-ccw: El Torito 16-bit boot image size field workaround
Because of El Torito spec flaw boot image size needs to be verified.

Boot catalog entry size field has 16-bit width, and specifies size
in 512-byte units.

Thus, boot image size cannot exceed 32M.

We actually search for the file to get the file size.

This is done by scanning the ISO directory tree for the ISO block number
and reading the file size from the directory entry.

Signed-off-by: Maxim Samoylov <max7255@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-11-11 17:21:39 +01:00
Maxim Samoylov
ba21f0cca8 pc-bios/s390-ccw: El Torito s390x boot entry check
Boot entry is considered compatible if boot image is Linux kernel
with matching S390 Linux magic string.

Empty boot images with sector_count == 0 are considered broken.

Signed-off-by: Maxim Samoylov <max7255@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-11-11 17:21:39 +01:00
Maxim Samoylov
866cac91e0 pc-bios/s390-ccw: ISO-9660 El Torito boot implementation
This patch enables boot from media formatted according to
ISO-9660 and El Torito bootable CD specification.

We try to boot from device as ISO-9660 media when SCSI IPL failed.

The first boot catalog entry with bootable flag is used.

ISO-9660 media with default 2048-bytes sector size only is supported.

Signed-off-by: Maxim Samoylov <max7255@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-11-11 17:21:39 +01:00
Christian Borntraeger
f17a84300f pc-bios/s390-ccw: fix sparse warnings
Fix some sparse warnings in the s390-ccw bios.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-02-03 13:42:40 +01:00
Christian Borntraeger
1aa7f4c6aa pc-bios/s390-ccw: Do proper console setup
The final newline/return must happen before we reset the sclp via
diag 308.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-09-01 09:23:02 +02:00
Eugene (jno) Dvurechenski
14f56a2e35 pc-bios/s390-ccw: IPL from DASD with format variations
There are two known cases of DASD format where signatures are
incomplete or absent:

1. result of <dasdfmt -d ldl -L ...> (ECKD_LDL_UNLABELED)
2. CDL with zero keys in IPL1 and IPL2 records

Now the code attempts to
1. find zIPL and use SCSI layout
2. find IPL1 and use CDL layout
3. find CMS1 and use LDL layout
3. find LNX1 and use LDL layout
4. find zIPL and use unlabeled LDL layout
5. find zIPL and use CDL layout
6. die
in this sequence.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-09-01 09:23:02 +02:00
Eugene (jno) Dvurechenski
f04db28b86 pc-bios/s390-ccw Really big EAV ECKD DASD handling
For EAV ECKD DASD, the cylinder count will have the magic value
0xfffeU. Therefore, use the block number to test for valid eckd
addresses instead.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-09-01 09:23:02 +02:00
Eugene (jno) Dvurechenski
b0885f7599 pc-bios/s390-ccw Improve ECKD informational message
Add block size display to ECKD scheme report.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-09-01 09:23:02 +02:00
Christian Borntraeger
f2879a5c9e pc-bios/s390-ccw: store proper subsystem information word
POP chapter 17 requires to store a subsystem information word at 184
during IPL. Furthermore bytes 188-191 should be zero. The bootmap might
contain data blocks that are written to the first page. We have to
write these values after we processed the bootmap and before the final
IPL.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-07-08 15:08:03 +02:00
Eugene (jno) Dvurechenski
564e52b96f pc-bios/s390-ccw: IPL from LDL/CMS-formatted ECKD DASD
Add code that allows us to start from two further ECKD DASD disk
layouts: LDL (Linux disk layout) and CMS (cms-formatted disk).

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:11:52 +02:00
Eugene (jno) Dvurechenski
e0aff4aa3f pc-bios/s390-ccw: IPL from CDL-formatted ECKD DASD
Add code that allows us to start from ECKD DASD using the z/OS
compatible disk layout (CDL), which is the most common format for ECKD
DASD.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:11:52 +02:00
Eugene (jno) Dvurechenski
a00b33d9e2 pc-bios/s390-ccw: factor out ipl code
Move the scsi-disk specific ipl code from zipl_load() into a new
function ipl_scsi(). This makes it easier to add ipl routines for other
disk types.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:11:49 +02:00
Eugene (jno) Dvurechenski
60612d5cbb pc-bios/s390-ccw: Unify error handling
Convert to IPL_assert and friends

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:10:28 +02:00
Eugene (jno) Dvurechenski
a94b485e17 pc-bios/s390-ccw: add some utility code
IPL_assert(term,message) is introduced to handle error conditions.
ebcdic_to_ascii() to convert chars (mostly to print VOLSERs).
read_block() provision for unified block-number handling.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:10:28 +02:00
Eugene (jno) Dvurechenski
91a03f9b69 pc-bios/s390-ccw: handle different sector sizes
Use the virtio device's configuration to figure out the disk geometry
and use a sector size based upon the layout.

[CH: s/SECTOR_SIZE/MAX_SECTOR_SIZE/g]
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 12:10:03 +02:00
Eugene (jno) Dvurechenski
26f2bbd6b1 pc-bios/s390-ccw: cleanup and enhance bootmap defintions
Add declarations to describe structure of different dasd IPL sources
(eckd and fba). Move the structure definitions to a new header bootmap.h.
While we are at it, change structs to typedefs.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 11:58:47 +02:00
Eugene (jno) Dvurechenski
abd696e4f7 pc-bios/s390-ccw: make checkpatch happy
Remove tabs, tweak whitespace and comments.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-27 11:57:25 +02:00
Eugene (jno) Dvurechenski
c77cd87cf5 pc-bios/s390-ccw: fix for fragmented SCSI bootmap
We need to interpret the last entry of the bootmap with zero
block count as "continuation pointer".
The "last entry" is being detected by pre-filling of the scratch
space with known values and respective look-ahead.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-23 14:03:31 +02:00
Christian Borntraeger
9629823290 pc-bios/s390-ccw: do a subsystem reset before running the guest
The loader BIOS has already activated several devices. Let's do a
subsystem reset before jumping into the guest. As there is no direct
way of doing so, we use diagnose 308 to bring the system in a
defined state. This is similar to what kdump on s390 uses. We have
to define a small trampoline function that restores the low bytes
to whatever the bootmap has written there.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-23 14:03:31 +02:00