I used the clang-tidy qemu-round check (with the option OnlyAlignUp)
to generate the fix:
https://github.com/elmarco/clang-tools-extra
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
The if_fastq and if_batchq contain not only packets, but queues of packets
for the same socket. When sofree frees a socket, it thus has to clear ifq_so
from all the packets from the queues, not only the first.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add nbd_co_request, to remove code duplications in
nbd_client_co_{pwrite,pread,...} functions. Also this is
needed for further refactoring.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-8-vsementsov@virtuozzo.com>
[eblake: make nbd_co_request a wrapper, rather than merging two
existing functions]
Signed-off-by: Eric Blake <eblake@redhat.com>
Rename nbd_recv_coroutines_enter_all to nbd_recv_coroutines_wake_all,
as it most probably just adds all recv coroutines into co_queue_wakeup,
rather than directly enter them.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-9-vsementsov@virtuozzo.com>
[eblake: tweak commit message]
Signed-off-by: Eric Blake <eblake@redhat.com>
Use int variable for nbd_co_send_request return value (as
nbd_co_send_request returns int).
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-6-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Fix nbd_send_request to return int, as it returns a return value
of nbd_write (which is int), and the only user of nbd_send_request's
return value (nbd_co_send_request) consider it as int too.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-5-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Refactor nbd_receive_reply to return 1 on success, 0 on eof, when no
data was read and <0 for other cases, because returned size of read
data is not actually used.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-4-vsementsov@virtuozzo.com>
[eblake: tweak function comments]
Signed-off-by: Eric Blake <eblake@redhat.com>
Refactor nbd_read_eof to return 1 on success, 0 on eof, when no
data was read and <0 for other cases, because returned size of
read data is not actually used.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-3-vsementsov@virtuozzo.com>
[eblake: tweak function comments, rebase to test 083 enhancements]
Signed-off-by: Eric Blake <eblake@redhat.com>
Do not send NBD_OPT_ABORT to the broken server. After sending
NBD_REP_ACK on NBD_OPT_GO server is most probably in transmission
phase, when option sending is finished.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170804151440.320927-2-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
083 only tests TCP. Some failures might be specific to UNIX domain
sockets.
A few adjustments are necessary:
1. Generating a port number and waiting for server startup is
TCP-specific. Use the new nbd-fault-injector.py startup protocol to
fetch the address. This is a little more elegant because we don't
need netstat anymore.
2. The NBD filter does not work for the UNIX domain sockets URIs we
generate and must be extended.
3. Run all tests twice: once for TCP and once for UNIX domain sockets.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20170829122745.14309-4-stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Currently 083 waits for the nbd-fault-injector.py server to start up by
looping until netstat shows the TCP listen socket.
The startup protocol can be simplified by passing a 0 port number to
nbd-fault-injector.py. The kernel will allocate a port in bind(2) and
the final port number can be printed by nbd-fault-injector.py.
This should make it slightly nicer and less TCP-specific to wait for
server startup. This patch changes nbd-fault-injector.py, the next one
will rewrite server startup in 083.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20170829122745.14309-3-stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
The following segfault is encountered if the NBD server closes the UNIX
domain socket immediately after negotiation:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 aio_co_schedule (ctx=0x0, co=0xd3c0ff2ef0) at util/async.c:441
441 QSLIST_INSERT_HEAD_ATOMIC(&ctx->scheduled_coroutines,
(gdb) bt
#0 0x000000d3c01a50f8 in aio_co_schedule (ctx=0x0, co=0xd3c0ff2ef0) at util/async.c:441
#1 0x000000d3c012fa90 in nbd_coroutine_end (bs=bs@entry=0xd3c0fec650, request=<optimized out>) at block/nbd-client.c:207
#2 0x000000d3c012fb58 in nbd_client_co_preadv (bs=0xd3c0fec650, offset=0, bytes=<optimized out>, qiov=0x7ffc10a91b20, flags=0) at block/nbd-client.c:237
#3 0x000000d3c0128e63 in bdrv_driver_preadv (bs=bs@entry=0xd3c0fec650, offset=offset@entry=0, bytes=bytes@entry=512, qiov=qiov@entry=0x7ffc10a91b20, flags=0) at block/io.c:836
#4 0x000000d3c012c3e0 in bdrv_aligned_preadv (child=child@entry=0xd3c0ff51d0, req=req@entry=0x7f31885d6e90, offset=offset@entry=0, bytes=bytes@entry=512, align=align@entry=1, qiov=qiov@entry=0x7ffc10a91b20, f
+lags=0) at block/io.c:1086
#5 0x000000d3c012c6b8 in bdrv_co_preadv (child=0xd3c0ff51d0, offset=offset@entry=0, bytes=bytes@entry=512, qiov=qiov@entry=0x7ffc10a91b20, flags=flags@entry=0) at block/io.c:1182
#6 0x000000d3c011cc17 in blk_co_preadv (blk=0xd3c0ff4f80, offset=0, bytes=512, qiov=0x7ffc10a91b20, flags=0) at block/block-backend.c:1032
#7 0x000000d3c011ccec in blk_read_entry (opaque=0x7ffc10a91b40) at block/block-backend.c:1079
#8 0x000000d3c01bbb96 in coroutine_trampoline (i0=<optimized out>, i1=<optimized out>) at util/coroutine-ucontext.c:79
#9 0x00007f3196cb8600 in __start_context () at /lib64/libc.so.6
The problem is that nbd_client_init() uses
nbd_client_attach_aio_context() -> aio_co_schedule(new_context,
client->read_reply_co). Execution of read_reply_co is deferred to a BH
which doesn't run until later.
In the mean time blk_co_preadv() can be called and nbd_coroutine_end()
calls aio_wake() on read_reply_co. At this point in time
read_reply_co's ctx isn't set because it has never been entered yet.
This patch simplifies the nbd_co_send_request() ->
nbd_co_receive_reply() -> nbd_coroutine_end() lifecycle to just
nbd_co_send_request() -> nbd_co_receive_reply(). The request is "ended"
if an error occurs at any point. Callers no longer have to invoke
nbd_coroutine_end().
This cleanup also eliminates the segfault because we don't call
aio_co_schedule() to wake up s->read_reply_co if sending the request
failed. It is only necessary to wake up s->read_reply_co if a reply was
received.
Note this only happens with UNIX domain sockets on Linux. It doesn't
seem possible to reproduce this with TCP sockets.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20170829122745.14309-2-stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This is the follow-up patch that was discussed[*] as part of feedback to
qemu-iotest 194.
Changes in this patch:
- Supply 'job-id' parameter to `drive-mirror` invocation.
- Once migration completes, issue QMP `block-job-cancel` command on
the source QEMU to gracefully complete `drive-mirror` operation.
- Once the BLOCK_JOB_COMPLETED event is emitted, stop the NBD server
on the destination QEMU.
- Check for both the events: MIGRATION and BLOCK_JOB_COMPLETED.
With the above, the test will also be (almost) in sync with the
procedure outlined in the document 'live-block-operations.rst'[+]
(section: "QMP invocation for live storage migration with
``drive-mirror`` + NBD").
[*] https://lists.nongnu.org/archive/html/qemu-devel/2017-08/msg04820.html
-- qemu-iotests: add 194 non-shared storage migration test
[+] https://git.qemu.org/gitweb.cgi?p=qemu.git;a=blob;f=docs/interop/live-block-operations.rst
Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Message-Id: <20170829165058.8229-1-kchamart@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Most qcow2 files are uncompressed so it is wasteful to allocate (32 + 1)
* cluster_size + 512 bytes upfront. Allocate s->cluster_cache and
s->cluster_data when the first read operation is performance on a
compressed cluster.
The buffers are freed in .bdrv_close(). .bdrv_open() no longer has any
code paths that can allocate these buffers, so remove the free functions
in the error code path.
This patch can result in significant memory savings when many qcow2
disks are attached or backing file chains are long:
Before 12.81% (1,023,193,088B)
After 5.36% (393,893,888B)
Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170821135530.32344-1-stefanha@redhat.com
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The function trap_msix() is to check if pcistg instruction would access
msix table entries. The correct boundary condition should be
[table_offset, table_offset+entries*entry_size). But the current
condition calculated misses the last entry. So let's fixup it.
Acked-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Message-Id: <1503907487-2764-2-git-send-email-zyimin@linux.vnet.ibm.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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>
The storage attribute devices are only meant to be instantiated one
time, internally. They can not be used by the user, so mark them with
user_creatable = false.
Suggested-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1503576029-24264-1-git-send-email-thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's reshuffle the function prototypes so we get a cleaner outline
of the files.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-19-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's do it just like the other architectures. Introduce kvm-stub.c
for stubs and kvm_s390x.h for the declarations.
Change license to GPL2+ and keep copyright notice.
As we are dropping the sysemu/kvm.h include from cpu.h, fix up includes.
Suggested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-18-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's just introduce an helper.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-17-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Prepare to move more stuff (especially KVM related) from cpu.h to
internal.h.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-16-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
cpu.h should only contain what really has to be accessed outside of
target/s390x/. Add internal.h which can only be used inside target/s390x/.
Move everything that isn't fast enough to run away and restructure it
right away. We'll move all kvm_* stuff later.
Minor style fixes to avoid checkpatch warning to:
- struct Lowcore: "{" goes into same line as typedef
- struct LowCore: add spaces around "-" in array length calculations
- time2tod() and tod2time(): move "{" to separate line
- get_per_atmid(): add space between ")" and "?". Move cases by one char.
- get_per_atmid(): drop extra paremthesis around (1 << 6)
Change license of new file to GPL2+ and keep copyright notice.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-15-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Only used in that file.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-14-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Only used in that file. Also drop the comment, not really needed.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-13-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Only used in that file.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-12-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Only used in that file.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-11-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
While at it, move the translations into the function and properly pass
enum cc_op as parameter. We can't move it to cc_helper.c as this would
break --disable-tcg.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-10-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The functions are not used in target/s390x/ so a header in hw/s390x/
is a better place.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-9-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
s390-stattrib.c needs definition of TARGET_PAGE_SIZE, solve it via cpu.h.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-8-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Now we can drop inclusion of "sysemu/kvm.h" from "s390-virtio.c".
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-7-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's avoid any KVM stuff in s390-virtio-ccw.c. This parameter is simply
ignored.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-6-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
No need for kvm_enabled() as this function is only called from KVM and
there is no reason why it shouldn't be allowed for tcg. It is simply not
available under tcg.
Also, there is no need to check for the machine type anymore. Just like
ri_enabled(), we can directly use the stored flag, which results in
"true" for the "none" machine.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-5-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Only used in KVM and there is no reason why it shouldn't be allowed for
tcg - it is simply not available.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-4-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Not needed at that point. Also drop it from kvm_s390_query_mem_limit()
we call in kvm_s390_set_mem_limit().
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-3-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Not needed at that point.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170818114353.13455-2-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
QEMU currently aborts if the user tries to create a skey device:
$ s390x-softmmu/qemu-system-s390x -nographic -device s390-skeys-qemu
qemu-system-s390x: hw/s390x/s390-skeys.c:30: s390_get_skeys_device:
Assertion `ss' failed.
Aborted (core dumped)
The storage key devices are only meant to be instantiated one time,
internally. They can not be used by the user, so mark them with
user_creatable = false.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1503569328-22197-1-git-send-email-thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
VIRTIO_PCI should properly depend on CONFIG_PCI.
With this change, we can switch off pci for s390x by removing
'CONFIG_PCI=y' from the default config.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
If a guest running on a machine without zpci issues a pci instruction,
throw them an exception.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
If we do not provide zpci, pci reconfiguration via sclp is not available
either. I/O adapter configuration, however, should always be present.
Rename the values that refer to I/O adapter configuration (instead of only
pci) to make things clearer.
Move length checking of the sccb for I/O adapter configuration into the
common sclp code (out of the pci code). This also fixes an issue that
the pci code would refer to a field in the sccb before checking whether
it was actually long enough.
Check for the adapter type in the sccb and return unrecognized adapter
type if the guest tries to issue I/O adapter configure/deconfigure for
a type other than pci or for pci if the zpci facility is not provided.
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Don't create the s390 pci host bridge if we do not provide the zpci
facility.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Only set the zpci feature bit on builds that actually support pci.
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The nt2 event class is pci-only - don't look for events if pci is
not in the active cpu model.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Some non-pci code calls into zpci code. Provide some stubs for builds
without pci.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The msi routing code in kvm calls some pci functions: provide
some stubs to enable builds without pci.
Also, to make this more obvious, guard them via a pci_available boolean
(which also can be reused in other places).
Fixes: e1d4fb2de ("kvm-irqchip: x86: add msi route notify fn")
Fixes: 767a554a0 ("kvm-all: Pass requester ID to MSI routing functions")
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Nothing in fsdev/ or hw/9pfs/ depends on pci; it should rather depend
on CONFIG_VIRTFS and CONFIG_VIRTIO/CONFIG_XEN only.
Acked-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
KVM guests on s390 need a different page table layout than normal
processes (2kb page table + 2kb page status extensions vs 2kb page table
only). As of today this has to be enabled via the vm.allocate_pgste
sysctl.
Newer kernels (>= 4.12) on s390 check for an S390_PGSTE program header
and enable the pgste page table extensions in that case. This makes the
vm.allocate_pgste sysctl unnecessary. We enable this program header for
the s390 system emulation (qemu-system-s390x) if we build on s390
- for s390 system emulation
- the linker supports --s390-pgste (binutils >= 2.29)
- KVM is enabled
This will allow distributions to disable the global vm.allocate_pgste
sysctl, which will improve the page table allocation for non KVM
processes as only 2kb chunks are necessary.
Cc: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Dan Horak <dhorak@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1503483383-199649-1-git-send-email-borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
QEMU currently aborts when the user tries to hot-unplug a diag288
device:
$ qemu-system-s390x -nographic -nodefaults -S -monitor stdio
QEMU 2.9.92 monitor - type 'help' for more information
(qemu) device_add diag288,id=x
(qemu) device_del x
**
ERROR:qemu/qdev-monitor.c:872:qdev_unplug: assertion failed: (hotplug_ctrl)
Aborted (core dumped)
The device is not designed as hot-pluggable (it should only be used
via the "-watchdog" parameter), so let's simply remove the possibility
to hotplug it to prevent that users can run into this ugly situation.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1502892528-22618-1-git-send-email-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
