Commit Graph

99 Commits

Author SHA1 Message Date
Viktor Mihajlovski a8fbbf1db7 s390: set DHCP client architecure id for netboot
Setting the client architecture DHCP option to 0x001f (s390 Basic) [1]
allows the DHCP server to return a s390-specific bootfile if wanted.
DHCP servers not configured for the option (or not yet recognizing the
option value) will continue to work as they have done before.

[1] https://www.iana.org/assignments/dhcpv6-parameters

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Message-Id: <1505126027-1704-1-git-send-email-mihajlov@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-09-19 18:21:33 +02:00
Farhan Ali 3a1e4561ad s390-ccw: Fix alignment for CCW1
The commit 198c0d1f9d s390x/css: check ccw address validity
exposes an alignment issue in ccw bios.

According to PoP the CCW must be doubleword aligned. Let's fix
this in the bios.

Cc: qemu-stable@nongnu.org
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <3ed8b810b6592daee6a775037ce21f850e40647d.1503667215.git.alifm@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-08-30 18:23:26 +02:00
Eric Farman 88b3739acd pc-bios/s390-ccw: Use rm command during make clean
This reverts a change that replaced the "rm -f" command with the
undefined variable RM (expected to be set by make), and causes the
"make clean" command to fail for a s390 target:

make[1]: Entering directory '/usr/src/qemu/build/pc-bios/s390-ccw'
rm -f *.timestamp
*.o *.d *.img *.elf *~ *.a
/bin/sh: *.o: command not found
Makefile:39: recipe for target 'clean' failed
make[1]: *** [clean] Error 127
make[1]: Leaving directory '/usr/src/qemu/build/pc-bios/s390-ccw'
Makefile:489: recipe for target 'clean' failed
make: *** [clean] Error 1

Fixes: 3e4415a751 ("pc-bios/s390-ccw: Add core files for the network
                      bootloading program")
Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170814204450.24118-2-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-08-15 09:06:01 +02:00
Thomas Huth 29d12216da pc-bios/s390-ccw: Link libnet into the netboot image and do the TFTP load
Most of the code has been taken from SLOF's netload.c file. Now we
can finally load an image via TFTP and execute the downloaded kernel.

Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-12-git-send-email-thuth@redhat.com>
Tested-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-07-14 12:29:48 +02:00
Thomas Huth 00dde1e60d pc-bios/s390-ccw: Add virtio-net driver code
The driver provides the recv() and send() functions which will
be required by SLOF's libnet code for receiving and sending
packets.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-11-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 3e4415a751 pc-bios/s390-ccw: Add core files for the network bootloading program
This is just a preparation for the next steps: Add a makefile and a
stripped down copy of pc-bios/s390-ccw/main.c as a basis for the network
bootloader program, linked against the libc from SLOF already (which we
will need for SLOF's libnet). The networking code is not included yet.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-10-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 59efbff1cb pc-bios/s390-ccw: Add code for virtio feature negotiation
The upcoming virtio-net driver needs to negotiate some features,
so we need the possibility to do this in the core virtio code.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-8-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 ac7bec7cf9 pc-bios/s390-ccw: Remove unused structs from virtio.h
Looks like they have never been used, so let's simply remove them.

Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-7-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 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 3639f93f91 pc-bios/s390-ccw: Add a write() function for stdio
The stdio functions from the SLOF libc need a write() function for
printing text to stdout/stderr. Let's implement this function by
refactoring the code from sclp_print().

Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-5-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 867e039a06 pc-bios/s390-ccw: Move virtio-block related functions into a separate file
The netboot code is going to link against the code from virtio.c, too, so
we've got to move the virtio-block and -scsi related code out of the way.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-4-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 af3bb73ab1 pc-bios/s390-ccw: Move ebc2asc to sclp.c
We will later need this array in a file that we will link to the
netboot code, too. Since there is some ebcdic conversion done
in sclp_get_loadparm_ascii(), the sclp.c file seems to be a good
candidate.

Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-3-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
Greg Kurz c68f4503e0 pc-bios/s390-ccw: use STRIP variable in Makefile
The docker-run-test-build@debian-s390x-cross target fails with:

strip --strip-unneeded s390-ccw.elf -o s390-ccw.img
strip: Unable to recognise the format of the input file `s390-ccw.elf'

The configure script defines a STRIP makefile variable whose default
value is ${cross_prefix}strip. Let's use it.

We default to using the non-prefixed strip command in case --enable-debug
or --disable-strip was passed to configure during a regular build.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <149623617700.4947.12490877660892961664.stgit@bahia.lan>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-06-06 10:50:40 +02:00
Eric Farman de4e3ae408 pc-bios/s390-ccw: Build a reasonable max_sectors limit
Now that we've read all the possible limits that have been defined for
a virtio-scsi controller and the disk we're booting from, it's possible
that we are STILL going to exceed the limits of the host device.
For example, a "-device scsi-generic" device does not support the
Block Limits VPD page.

So, let's fallback to something that seems to work for most boot
configurations if larger values were specified (including if nothing
was explicitly specified, and we took default values).

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170510155359.32727-8-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +02:00
Eric Farman fe921fc8b7 pc-bios/s390-ccw: Get Block Limits VPD device data
The "Block Limits" Inquiry VPD page is optional for any SCSI device,
but if it's supported it provides a hint of the maximum I/O transfer
length for this particular device. If this page is supported by the
disk, let's issue that Inquiry and use the minimum of it and the
SCSI controller limit. That will cover this scenario:

  qemu-system-s390x ...
    -device virtio-scsi-ccw,id=scsi0,max_sectors=32768 ...
    -drive file=/dev/sda,if=none,id=drive0,format=raw ...
    -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,
            drive=drive0,id=disk0,max_io_size=1048576

controller: 32768 sectors x 512 bytes/sector = 16777216 bytes
      disk:                                     1048576 bytes

Now that we have a limit for a virtio-scsi disk, compare that with the
limit for the virtio-scsi controller when we actually build the I/O.
The minimum of these two limits should be the one we use.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170510155359.32727-7-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +02:00
Eric Farman 8edfe85bef pc-bios/s390-ccw: Get list of supported VPD pages
The "Supported Pages" Inquiry EVPD page is mandatory for all SCSI devices,
and is used as a gateway for what VPD pages the device actually supports.
Let's issue this Inquiry, and dump that list with the debug facility.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170510155359.32727-6-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +02:00
Eric Farman 9c12359c57 pc-bios/s390-ccw: Refactor scsi_inquiry function
If we want to issue any of the SCSI Inquiry EVPD pages,
which we do, we could use this function to issue both types
of commands with a little bit of refactoring.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170510155359.32727-5-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +02:00
Eric Farman 5ffd4a3c2d pc-bios/s390-ccw: Break up virtio-scsi read into multiples
A virtio-scsi request that goes through the host sd driver and exceeds
the maximum transfer size is automatically broken up for us.  But the
equivalent request going to the sg driver presumes that any length
requirements have already been honored.

Let's use the max_sectors field on the virtio-scsi controller device,
and break up all requests (both sd and sg) to avoid this problem.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170510155359.32727-4-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +02:00
Eric Farman 98d3c52435 pc-bios/s390-ccw: Move SCSI block factor to outer read
Simple refactoring so that the blk_factor adjustment is
moved into virtio_scsi_read_many routine, in preparation
for another change.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Message-Id: <20170510155359.32727-3-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +02:00
Eric Farman 77c76392b0 pc-bios/s390-ccw: Remove duplicate blk_factor adjustment
When using virtio-scsi, we multiply the READ(10) data_size by
a block factor twice when building the I/O.  This is fine,
since it's only 1 for SCSI disks, but let's clean it up.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20170510155359.32727-2-farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-19 12:29:01 +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 95fa1af854 pc-bios/s390-ccw: provide a function to interpret LOADPARM value
The LOADPARM value is fetched from SCP Read Info, but it's applied
only at the phase of bootmap interpretation. So let's read the LOARPARM
value and store it. Also provide a parsing function to detect numbers in
the LOADPARM which can be used during bootmap interpretation.

Remove a stray whitespace.

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>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-05-02 15:08:54 +02:00
Farhan Ali 9a22473c70 pc-bios/s390-ccw: get LOADPARM stored in SCP Read Info
Obtain the loadparm value stored in SCP Read Info by performing
a SCLP Read Info request.

Rename sclp-ascii.c to sclp.c to reflect the changed scope of
the file.

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
Eugene (jno) Dvurechenski cfe2124a7f pc-bios/s390-ccw: Make ebcdic/ascii conversion public
Make the ebcdic_to_ascii function public to the rest of the
"bios" code, as the volume label is no more the single thing
to be converted.

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
Peter Maydell 0bdb12c7c5 rules.mak: quiet-command: Split command name and args to print
The quiet-command make rule currently takes two arguments:
the command and arguments to run, and a string to print if
the V flag is not set (ie we are not being verbose).
By convention, the string printed is of the form
"  NAME   some args". Unfortunately to get nicely lined up
output all the strings have to agree about what column the
arguments should start in, which means that if we add a
new quiet-command usage which wants a slightly longer CMD
name then we either put up with misalignment or change
every quiet-command string.

Split the quiet-mode string into two, the "NAME" and
the "same args" part, and use printf(1) to format the
string automatically. This means we only need to change
one place if we want to support a longer maximum name.

In particular, we can now print 7-character names lined
up properly (they are needed for the OSX "SETTOOL" invocation).

Change all the uses of quiet-command to the new syntax.
(Any which are missed or inadvertently reintroduced
via later merges will result in slightly misformatted
quiet output rather than disaster.)

A few places in the pc-bios/ makefiles are updated to use
"BUILD", "SIGN" and "STRIP" rather than "Building",
"Signing" and "Stripping" for consistency and to keep them
below 7 characters. Module .mo links now print "LD" rather
than the nonstandard "LD -r".

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1475598441-27908-1-git-send-email-peter.maydell@linaro.org
2016-10-06 12:11:51 +01:00
Dong Jia Shi 9c9f5f311a pc-bios/s390-ccw: enable subchannel for IPL I/O devices
IPL should cause the IPL I/O device to become enabled. So when handling
the IPL program, we should set the E (Enable) bit. However, virtio-ccw
does not know whether it's dealing with an IPL device or not. Since
trying to perform I/O on a disabled device doesn't make any sense,
let's just always enable it. At the same time we can remove the
SCSW_FCTL_START_FUNC flag as it is ignored for msch anyway and did
not enable the device as intended.

Reported-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
[remove superfluous flag]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-09-28 13:24:51 +02:00
Christian Borntraeger c86c03cfd2 pc-bios/s390-ccw.img: Fix build
Since
commit a9c87304b7 ("build-sys: fix building with make CFLAGS=.. argument")

pc-bios/s390-ccw.img build might fail with

--- snip ---
main.o: In function `virtio_setup':
qemu/pc-bios/s390-ccw/main.c:117: undefined reference to `__stack_chk_fail'
--- snip ---

Changing the CFLAGS to QEMU_CFLAGS does the trick. We also need to
add -fno-strict-aliasing as this was filtered out.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <1471258997-5811-1-git-send-email-borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-08-16 08:52:02 +02:00
Eugene (jno) Dvurechenski b39b7718dc pc-bios/s390-ccw: Pass selected SCSI device to IPL
There is ,bootindex=%d argument to specify the lookup order of
boot devices.

If a bootindex assigned to the device, then IPL Parameter Info Block
is created for that device when it is IPLed from.

If it is a mere SCSI device (not FCP), then IPIB is created with a
special SCSI type and its fields are used to store SCSI address of the
device. This new ipl block is private to qemu for now.

If the device to IPL from is specified this way, then SCSI bus lookup
is bypassed and prescribed devices uses the address specified.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-07-11 09:48:05 +02:00
Alexander Yarygin d046c51dad pc-bios/s390-ccw: Get device address via diag 308/6
To IPL from a device, pc-bios receives from qemu a device address via
general register 7. The better way to do it is to use diag308/6
instruction which returns so called
"IplParameterBlock". IplParameterBlock contains the device address for
IPL and additional parameters that can be used by pc-bios.

This patch allows pc-bios to get device address via diag308/6 and
doesn't use gr7 passed boot information anymore.

Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-05-17 15:50:29 +02:00
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 80ba3e249b pc-bios/s390-ccw: enable virtio-scsi
Make the code added before to work.

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 86aec22d48 pc-bios/s390-ccw: add virtio-scsi implementation
Add virtio-scsi.[ch] with primary implementation of virtio-scsi.

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 f791561476 pc-bios/s390-ccw: add scsi definitions
Add scsi.h to provide basic definitions for SCSI.

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 8944edc3dd pc-bios/s390-ccw: add simplified virtio call
Add virtio_run(VirtioCmd) call to use simple declarative approach.

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 a1102cebbf pc-bios/s390-ccw: make provisions for different backends
Add dispatching code to make room for non virtio-blk boot devices.

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 69429682c6 pc-bios/s390-ccw: add vdev object to store all device details
Add VDev "object" as a container for all device-related items.
The default object is static.

Leverage dependency on many different device-related globals.
Make them syntactically visible.

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 8512989143 pc-bios/s390-ccw: update virtio implementation to allow up to 3 vrings
Add ability to work with up to 3 vrings, which is required for
virtio-scsi implementation.
Implement the optional cookie to speed up processing of virtio
notifications.

Reviewed-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>
2016-03-23 16:13:38 +01:00
Eugene (jno) Dvurechenski b88d7fa590 pc-bios/s390-ccw: qemuize types
Turn [the most of] existing declarations from
    struct type_name { ... };
into
    struct TypeName { ... };
    typedef struct TypeName TypeName;
and make use of them.

Also switch u{8,16,32,64} to uint{8,16,32,64}_t.

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>
2016-03-23 16:13:38 +01:00
Eugene (jno) Dvurechenski dc25e843f6 pc-bios/s390-ccw: add utility functions and "export" some others
Add several utility functions, make IPL_check and IPL_assert generally
available, etc.

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>
2016-03-23 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
Christian Borntraeger 7619562a64 pc-bios/s390-ccw: build for z900
Newer distributions have an architecture level set to z9, z196
or similar - also as default option for the compiler.

We should build the bios for z900 to allow it to run with
all 64bit CPUs. This will become more important as soon as
QEMU/KVM does support CPU models.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-By: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-12-01 09:57:27 +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