Commit Graph

7812 Commits

Author SHA1 Message Date
Janosch Frank
28221f9c99 s390x: Fence huge pages prior to 3.1
As the kernel has no way of disallowing the start of a huge page
backed VM, we can migrate a running huge backed VM to a host that has
no huge page KVM support.

Let's glue huge page support support to the 3.1 machine, so we do not
migrate to a destination host that doesn't have QEMU huge page support
and can stop migration if KVM doesn't indicate support.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20180928093435.198573-1-frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-10-04 10:32:39 +02:00
Thomas Huth
cb89b34907 hw/s390x/ioinst: Fix alignment problem in struct SubchDev
struct SubchDev embeds several other structures which are marked with
QEMU_PACKED. This causes the compiler to not care for proper alignment
of these structures. When we later pass around pointers to the unaligned
struct members during migration, this causes problems on host architectures
like Sparc that can not do unaligned memory access.

Most of the structs in ioinst.h are naturally aligned, so we can fix
most of the problem by removing the QEMU_PACKED statements (and use
QEMU_BUILD_BUG_MSG() statements instead to make sure that there is no
padding). However, for the struct SCHIB, we have to keep the QEMU_PACKED
since the compiler adds some padding here otherwise. Move this struct
to the beginning of struct SubchDev instead to fix the alignment problem
here, too.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1538036615-32542-4-git-send-email-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-10-04 10:32:38 +02:00
Thomas Huth
729315ebca hw/s390x/css: Remove QEMU_PACKED from struct SenseId
The uint16_t member cu_type of struct SenseId is not naturally aligned,
and since the struct is marked with QEMU_PACKED, this can lead to
unaligned memory accesses - which does not work on architectures like
Sparc. Thus remove the QEMU_PACKED here and rather copy the struct
byte by byte when we do copy_sense_id_to_guest().

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1538036615-32542-3-git-send-email-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-10-04 10:32:38 +02:00
Peter Maydell
62a0db942d memory: Remove old_mmio accessors
Now that all the users of old_mmio MemoryRegion accessors
have been converted, we can remove the core code support.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180824170422.5783-2-peter.maydell@linaro.org>
Based-on: <20180802174042.29234-1-peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:09:14 +02:00
Hikaru Nishida
d5dbde4645 hostmem-file: make available memory-backend-file on POSIX-based hosts
Before this change, memory-backend-file object is valid for Linux hosts
only because hostmem-file.c is compiled only on Linux hosts.
However, other POSIX-based hosts (such as macOS) can support
memory-backend-file object in the same way as on Linux hosts.
This patch makes hostmem-file.c and related functions to be compiled on
all POSIX-based hosts to make available memory-backend-file on them.

Signed-off-by: Hikaru Nishida <hikarupsp@gmail.com>
Message-Id: <20180924123205.29651-1-hikarupsp@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:09:13 +02:00
Viktor Prutyanov
a52fbc37a4 dump: move Windows dump structures definitions
This patch moves definitions of Windows dump structures to
include/qemu/win_dump_defs.h to keep create_win_dump() prototype separate.

Signed-off-by: Viktor Prutyanov <viktor.prutyanov@virtuozzo.com>
Message-Id: <1535546488-30208-2-git-send-email-viktor.prutyanov@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:09:12 +02:00
Pavel Dovgalyuk
87f4fe7653 timer: introduce new virtual clock
Slirp and VNC modules use virtual clock for processing some events that
are related to the guest execution speed.
But virtual clock-related events are consideres to be deterministic and
are recorded/replayed by icount mechanism. But slirp and VNC lie outside
the recorded guest core (which includes CPU and peripherals).
Therefore slirp and VNC are external for the guest, but should work at
guest speed.
This patch introduces new virtual clock which can be used for external
subsystems for running timers that are synchronized with the guest.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Message-Id: <20180912082002.3228.82417.stgit@pasha-VirtualBox>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:08:58 +02:00
Pavel Dovgalyuk
0c08185f8f replay: wake up vCPU when replaying
In record/replay icount mode vCPU thread and iothread synchronize
the execution using the checkpoints.
vCPU thread processes the virtual timers and iothread processes all others.
When iothread wants to wake up sleeping vCPU thread, it sends dummy queued
work. Therefore it could be the following sequence of the events in
record mode:
 - IO: sending dummy work
 - IO: processing timers
 - CPU: wakeup
 - CPU: clearing dummy work
 - CPU: processing virtual timers

But due to the races in replay mode the sequence may change:
 - IO: sending dummy work
 - CPU: wakeup
 - CPU: clearing dummy work
 - CPU: sleeping again because nothing to do
 - IO: Processing timers
 - CPU: zzzz

In this case vCPU will not wake up, because dummy work is not to be set up
again.

This patch tries to wake up the vCPU when it sleeps and the icount warp
checkpoint isn't met. It means that vCPU has something to do, because
there are no other reasons of non-matching warp checkpoint.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>

--

v5: improve checking that vCPU is still sleeping
Message-Id: <20180912081945.3228.19776.stgit@pasha-VirtualBox>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:08:51 +02:00
Li Zhijian
f3839fda57 change get_image_size return type to int64_t
Previously, if the size of initrd >=2G, qemu exits with error:
root@haswell-OptiPlex-9020:/home/lizj# /home/lizhijian/lkp/qemu-colo/x86_64-softmmu/qemu-system-x86_64 -kernel ./vmlinuz-4.16.0-rc4 -initrd large.cgz -nographic
qemu: error reading initrd large.cgz: No such file or directory
root@haswell-OptiPlex-9020:/home/lizj# du -sh large.cgz
2.5G	large.cgz

this patch changes the caller side that use this function to calculate
size of initrd file as well.

v2: update error message and int64_t printing format

Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Message-Id: <1536833233-14121-1-git-send-email-lizhijian@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:08:49 +02:00
Marc-André Lureau
9e6bdef224 util: add qemu_write_pidfile()
There are variants of qemu_create_pidfile() in qemu-pr-helper and
qemu-ga. Let's have a common implementation in libqemuutil.

The code is initially based from pr-helper write_pidfile(), with
various improvements and suggestions from Daniel Berrangé:

  QEMU will leave the pidfile existing on disk when it exits which
  initially made me think it avoids the deletion race. The app
  managing QEMU, however, may well delete the pidfile after it has
  seen QEMU exit, and even if the app locks the pidfile before
  deleting it, there is still a race.

  eg consider the following sequence

        QEMU 1        libvirtd        QEMU 2

  1.    lock(pidfile)

  2.    exit()

  3.                 open(pidfile)

  4.                 lock(pidfile)

  5.                                  open(pidfile)

  6.                 unlink(pidfile)

  7.                 close(pidfile)

  8.                                  lock(pidfile)

  IOW, at step 8 the new QEMU has successfully acquired the lock, but
  the pidfile no longer exists on disk because it was deleted after
  the original QEMU exited.

  While we could just say no external app should ever delete the
  pidfile, I don't think that is satisfactory as people don't read
  docs, and admins don't like stale pidfiles being left around on
  disk.

  To make this robust, I think we might want to copy libvirt's
  approach to pidfile acquisition which runs in a loop and checks that
  the file on disk /after/ acquiring the lock matches the file that
  was locked. Then we could in fact safely let QEMU delete its own
  pidfiles on clean exit..

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180831145314.14736-2-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 18:47:55 +02:00
Marc-André Lureau
3829640049 hostmem-memfd: add checks before adding hostmem-memfd & properties
Run some memfd-related checks before registering hostmem-memfd &
various properties. This will help libvirt to figure out what the host
is supposed to be capable of.

qemu_memfd_check() is changed to a less optimized version, since it is
used with various flags, it no longer caches the result.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180906161415.8543-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 18:47:55 +02:00
Emilio G. Cota
782da5b292 util: add atomic64
This introduces read/set accessors for int64_t and uint64_t.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20180910232752.31565-3-cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 18:47:55 +02:00
Emilio G. Cota
5fe2103429 cacheinfo: add i/d cache_linesize_log
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20180910232752.31565-2-cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 18:47:55 +02:00
Emilio G. Cota
119c440c3c atomic: fix comment s/x64_64/x86_64/
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20180903171831.15446-4-cota@braap.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 18:47:55 +02:00
Paolo Bonzini
07d66672e7 qsp: hide indirect function calls from Coverity
Coverity does not see anymore that qemu_mutex_lock is taking a lock.
Hide all the QSP magic so that static analysis works again.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 18:47:55 +02:00
Peter Maydell
e32e62f253 Block layer patches:
- qcow2 cache option default changes (Linux: 32 MB maximum, limited by
   whatever cache size can be made use of with the specific image;
   default cache-clean-interval of 10 minutes)
 - reopen: Allow specifying unchanged child node references, and changing
   a few generic options (discard, detect-zeroes)
 - Fix werror/rerror defaults for -device drive=<node-name>
 - Test case fixes
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- qcow2 cache option default changes (Linux: 32 MB maximum, limited by
  whatever cache size can be made use of with the specific image;
  default cache-clean-interval of 10 minutes)
- reopen: Allow specifying unchanged child node references, and changing
  a few generic options (discard, detect-zeroes)
- Fix werror/rerror defaults for -device drive=<node-name>
- Test case fixes

# gpg: Signature made Mon 01 Oct 2018 18:17:35 BST
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (23 commits)
  tests/test-bdrv-drain: Fix too late qemu_event_reset()
  test-replication: Lock AioContext around blk_unref()
  qcow2: Fix cache-clean-interval documentation
  block-backend: Set werror/rerror defaults in blk_new()
  qcow2: Explicit number replaced by a constant
  qcow2: Set the default cache-clean-interval to 10 minutes
  qcow2: Resize the cache upon image resizing
  qcow2: Increase the default upper limit on the L2 cache size
  qcow2: Assign the L2 cache relatively to the image size
  qcow2: Avoid duplication in setting the refcount cache size
  qcow2: Make sizes more humanly readable
  include: Add a lookup table of sizes
  qcow2: Options' documentation fixes
  block: Allow changing 'detect-zeroes' on reopen
  block: Allow changing 'discard' on reopen
  file-posix: Forbid trying to change unsupported options during reopen
  block: Forbid trying to change unsupported options during reopen
  block: Allow child references on reopen
  block: Don't look for child references in append_open_options()
  block: Remove child references from bs->{options,explicit_options}
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-01 18:22:55 +01:00
Leonid Bloch
540b849261 include: Add a lookup table of sizes
Adding a lookup table for the powers of two, with the appropriate size
prefixes. This is needed when a size has to be stringified, in which
case something like '(1 * KiB)' would become a literal '(1 * (1L << 10))'
string. Powers of two are used very often for sizes, so such a table
will also make it easier and more intuitive to write them.

This table is generatred using the following AWK script:

BEGIN {
	suffix="KMGTPE";
	for(i=10; i<64; i++) {
		val=2**i;
		s=substr(suffix, int(i/10), 1);
		n=2**(i%10);
		pad=21-int(log(n)/log(10));
		printf("#define S_%d%siB %*d\n", n, s, pad, val);
	}
}

Signed-off-by: Leonid Bloch <lbloch@janustech.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-01 12:51:12 +02:00
Alberto Garcia
543770bd2e block: Allow changing 'detect-zeroes' on reopen
'detect-zeroes' is one of the basic BlockdevOptions available for all
drivers, but it's not handled by bdrv_reopen_prepare(), so any attempt
to change it results in an error:

   (qemu) qemu-io virtio0 "reopen -o detect-zeroes=on"
   Cannot change the option 'detect-zeroes'

Since there's no reason why we shouldn't allow changing it and the
implementation is simple let's just do it.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-01 12:51:12 +02:00
Peter Maydell
cc28dce2ec vga: add edid support, qxl bugfixes.
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Merge remote-tracking branch 'remotes/kraxel/tags/vga-20180927-pull-request' into staging

vga: add edid support, qxl bugfixes.

# gpg: Signature made Thu 27 Sep 2018 08:12:32 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/vga-20180927-pull-request:
  qxl: support mono cursors with inverted colors
  qxl: use guest_monitor_config for local renderer.
  display/stdvga: add edid support.
  display/edid: add DEFINE_EDID_PROPERTIES
  display/edid: add region helper.
  display/edid: add qemu_edid_size()
  display/edid: add edid generator to qemu.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-01 11:33:16 +01:00
Peter Maydell
07f426c35e Queued tcg patches
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Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20180926' into staging

Queued tcg patches

# gpg: Signature made Wed 26 Sep 2018 19:27:22 BST
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20180926:
  tcg/i386: fix vector operations on 32-bit hosts
  qht-bench: add -p flag to precompute hash values
  qht: constify arguments to some internal functions
  qht: constify qht_statistics_init
  qht: constify qht_lookup
  qht: fix comment in qht_bucket_remove_entry
  qht: drop ht argument from qht iterators
  test-qht: speed up + test qht_resize
  test-qht: test deletion of the last entry in a bucket
  test-qht: test removal of non-existent entries
  test-qht: test qht_iter_remove
  qht: add qht_iter_remove
  qht: remove unused map param from qht_remove__locked

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-28 18:56:09 +01:00
Gerd Hoffmann
06510b899f display/edid: add DEFINE_EDID_PROPERTIES
Add a define for edid monitor properties.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20180925075646.25114-5-kraxel@redhat.com
2018-09-27 08:07:51 +02:00
Gerd Hoffmann
97917e9e02 display/edid: add region helper.
Create a io region for an EDID data block.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180925075646.25114-4-kraxel@redhat.com
2018-09-27 08:07:51 +02:00
Gerd Hoffmann
e7992fc5a0 display/edid: add qemu_edid_size()
Helper function to figure the size of a edid blob, by checking how many
extensions are present.  Both the base edid blob and the extensions are
128 bytes in size.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20180925075646.25114-3-kraxel@redhat.com
2018-09-27 08:07:51 +02:00
Gerd Hoffmann
72d277a70e display/edid: add edid generator to qemu.
EDID is a metadata format to describe monitors.  On physical hardware
the monitor has an eeprom with that data block which can be read over
i2c bus.

On a linux system you can usually find the EDID data block in
/sys/class/drm/$card/$connector/edid.  xorg ships a edid-decode utility
which you can use to turn the blob into readable form.

I think it would be a good idea to use EDID for virtual displays too.
Needs changes in both qemu and guest kms drivers.  This patch is the
first step, it adds an generator for EDID blobs to qemu.  Comes with a
qemu-edid test tool included.

With EDID we can pass more information to the guest.  Names and serial
numbers, so the guests display configuration has no boring "Unknown
Monitor".  List of video modes.  Display resolution, pretty important
in case we want add HiDPI support some day.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20180925075646.25114-2-kraxel@redhat.com
2018-09-27 08:07:51 +02:00
Emilio G. Cota
6579f10779 qht: constify qht_statistics_init
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-09-26 08:55:54 -07:00
Emilio G. Cota
e6c5829950 qht: constify qht_lookup
seqlock_read_begin takes a const param since c04649eeea
("seqlock: constify seqlock_read_begin", 2018-08-23), so
we can constify the entire lookup.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-09-26 08:55:54 -07:00
Emilio G. Cota
78255ba2cc qht: drop ht argument from qht iterators
Accessing the HT from an iterator results almost always
in a deadlock. Given that only one qht-internal function
uses this argument, drop it from the interface.

Suggested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-09-26 08:55:54 -07:00
Emilio G. Cota
69d55e9cc2 qht: add qht_iter_remove
This currently has no users, but the use case is so common that I
think we must support it.

Note that without the appended we cannot safely remove a set of
elements; a 2-step approach (i.e. qht_iter first, keep track of
the to-be-deleted elements, and then a bunch of qht_remove calls)
would be racy, since between the iteration and the removals other
threads might insert additional elements.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-09-26 08:55:54 -07:00
Peter Maydell
866ba83854 - Deprecate the usage of a network backend via "name" instead of "id"
- Deprecate the "enforce-config-section" machine parameter
 - Re-enable the wdt_ib700, endianness and vmxnet3 qtests
 - Some trivial fixes and doc update patches that crossed my way
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Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2018-09-25' into staging

- Deprecate the usage of a network backend via "name" instead of "id"
- Deprecate the "enforce-config-section" machine parameter
- Re-enable the wdt_ib700, endianness and vmxnet3 qtests
- Some trivial fixes and doc update patches that crossed my way

# gpg: Signature made Tue 25 Sep 2018 16:58:42 BST
# gpg:                using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>"
# gpg:                 aka "Thomas Huth <thuth@redhat.com>"
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>"
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>"
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2018-09-25:
  Revert "check: Move VMXNET3 test to common"
  Revert "check: Move endianess test to common"
  Revert "check: Move wdt_ib700 test to common"
  tests/migration: Speed up the test on ppc64
  hw/qdev-core: Fix description of instance_init
  qdev: fix a typo in comment
  docs: Fix some typos (most found by codespell)
  trivial: Make bios files and source files non-executable
  memfd: fix possible usage of the uninitialized file descriptor
  hw/core/machine: Officially deprecate the enforce-config-section parameter
  net/slirp: Deprecate the [hub_id name] parameter tuple
  net: Deprecate the "name" parameter of -net
  Makefile: Add missing dependency for qemu-deprecated.texi

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 18:09:52 +01:00
Peter Maydell
c5e4e49258 Block layer patches:
- Drain fixes
 - node-name parameters for block-commit
 - Refactor block jobs to use transactional callbacks for exiting
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Merge remote-tracking branch 'remotes/xanclic/tags/pull-block-2018-09-25' into staging

Block layer patches:
- Drain fixes
- node-name parameters for block-commit
- Refactor block jobs to use transactional callbacks for exiting

# gpg: Signature made Tue 25 Sep 2018 16:12:44 BST
# gpg:                using RSA key F407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1  1829 F407 DB00 61D5 CF40

* remotes/xanclic/tags/pull-block-2018-09-25: (42 commits)
  test-bdrv-drain: Test draining job source child and parent
  block: Use a single global AioWait
  test-bdrv-drain: Fix outdated comments
  test-bdrv-drain: AIO_WAIT_WHILE() in job .commit/.abort
  job: Avoid deadlocks in job_completed_txn_abort()
  test-bdrv-drain: Test nested poll in bdrv_drain_poll_top_level()
  block: Remove aio_poll() in bdrv_drain_poll variants
  blockjob: Lie better in child_job_drained_poll()
  block-backend: Decrease in_flight only after callback
  block-backend: Fix potential double blk_delete()
  block-backend: Add .drained_poll callback
  block: Add missing locking in bdrv_co_drain_bh_cb()
  test-bdrv-drain: Test AIO_WAIT_WHILE() in completion callback
  job: Use AIO_WAIT_WHILE() in job_finish_sync()
  test-blockjob: Acquire AioContext around job_cancel_sync()
  test-bdrv-drain: Drain with block jobs in an I/O thread
  aio-wait: Increase num_waiters even in home thread
  blockjob: Wake up BDS when job becomes idle
  job: Fix missing locking due to mismerge
  job: Fix nested aio_poll() hanging in job_txn_apply
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 16:47:35 +01:00
Thomas Huth
6038f98904 hw/qdev-core: Fix description of instance_init
The part of the documentation of DeviceClass that talks about instance_init
is partly wrong: instance_init() functions must not abort or exit, since
the function is also called during introspection of the device already.
So if a device calls exit() during its instance_init() function, QEMU
terminates unexpectedly if somebody tries to just have a look at the
interfaces from the device with "device_add xyz,help" or with the
"device-list-properties" QOM command. This should never happen.

Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2018-09-25 17:26:18 +02:00
Cédric Le Goater
fca9ca1b13 hw/arm/aspeed: Add an Aspeed machine class
The code looks better, it removes duplicated lines and it will ease
the introduction of common properties for the Aspeed machines.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180921161939.822-4-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 15:13:24 +01:00
Cédric Le Goater
03f1d7201a aspeed/timer: fix compile breakage with clang 3.4.2
In file included from /home/thuth/devel/qemu/hw/timer/aspeed_timer.c:16:
/home/thuth/devel/qemu/include/hw/misc/aspeed_scu.h:37:3: error:
redefinition of typedef 'AspeedSCUState' is a C11 feature
      [-Werror,-Wtypedef-redefinition]
} AspeedSCUState;
  ^
/home/thuth/devel/qemu/include/hw/timer/aspeed_timer.h:27:31: note:
previous definition is here
typedef struct AspeedSCUState AspeedSCUState;

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180921161939.822-2-clg@kaod.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 15:13:24 +01:00
Peter Maydell
48314d8316 hw/intc/arm_gic: Document QEMU interface
The GICv2's QEMU interface (sysbus MMIO regions, IRQs,
etc) is now quite complicated with the addition of the
virtualization extensions. Add a comment in the header
file which documents it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180823103818.31189-1-peter.maydell@linaro.org
2018-09-25 15:13:24 +01:00
Kevin Wolf
cfe29d8294 block: Use a single global AioWait
When draining a block node, we recurse to its parent and for subtree
drains also to its children. A single AIO_WAIT_WHILE() is then used to
wait for bdrv_drain_poll() to become true, which depends on all of the
nodes we recursed to. However, if the respective child or parent becomes
quiescent and calls bdrv_wakeup(), only the AioWait of the child/parent
is checked, while AIO_WAIT_WHILE() depends on the AioWait of the
original node.

Fix this by using a single AioWait for all callers of AIO_WAIT_WHILE().

This may mean that the draining thread gets a few more unnecessary
wakeups because an unrelated operation got completed, but we already
wake it up when something _could_ have changed rather than only if it
has certainly changed.

Apart from that, drain is a slow path anyway. In theory it would be
possible to use wakeups more selectively and still correctly, but the
gains are likely not worth the additional complexity. In fact, this
patch is a nice simplification for some places in the code.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:50:15 +02:00
Kevin Wolf
b5a7a05735 blockjob: Lie better in child_job_drained_poll()
Block jobs claim in .drained_poll() that they are in a quiescent state
as soon as job->deferred_to_main_loop is true. This is obviously wrong,
they still have a completion BH to run. We only get away with this
because commit 91af091f92 added an unconditional aio_poll(false) to the
drain functions, but this is bypassing the regular drain mechanisms.

However, just removing this and telling that the job is still active
doesn't work either: The completion callbacks themselves call drain
functions (directly, or indirectly with bdrv_reopen), so they would
deadlock then.

As a better lie, tell that the job is active as long as the BH is
pending, but falsely call it quiescent from the point in the BH when the
completion callback is called. At this point, nested drain calls won't
deadlock because they ignore the job, and outer drains will wait for the
job to really reach a quiescent state because the callback is already
running.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:50:15 +02:00
Kevin Wolf
aa1361d54a block: Add missing locking in bdrv_co_drain_bh_cb()
bdrv_do_drained_begin/end() assume that they are called with the
AioContext lock of bs held. If we call drain functions from a coroutine
with the AioContext lock held, we yield and schedule a BH to move out of
coroutine context. This means that the lock for the home context of the
coroutine is released and must be re-acquired in the bottom half.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:50:15 +02:00
Kevin Wolf
30c070a547 test-blockjob: Acquire AioContext around job_cancel_sync()
All callers in QEMU proper hold the AioContext lock when calling
job_finish_sync(). test-blockjob should do the same when it calls the
function indirectly through job_cancel_sync().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
2018-09-25 15:50:15 +02:00
Kevin Wolf
486574483a aio-wait: Increase num_waiters even in home thread
Even if AIO_WAIT_WHILE() is called in the home context of the
AioContext, we still want to allow the condition to change depending on
other threads as long as they kick the AioWait. Specfically block jobs
can be running in an I/O thread and should then be able to kick a drain
in the main loop context.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
2018-09-25 15:50:15 +02:00
Kevin Wolf
34dc97b9a0 blockjob: Wake up BDS when job becomes idle
In the context of draining a BDS, the .drained_poll callback of block
jobs is called. If this returns true (i.e. there is still some activity
pending), the drain operation may call aio_poll() with blocking=true to
wait for completion.

As soon as the pending activity is completed and the job finally arrives
in a quiescent state (i.e. its coroutine either yields with busy=false
or terminates), the block job must notify the aio_poll() loop to wake
up, otherwise we get a deadlock if both are running in different
threads.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:50:15 +02:00
John Snow
ccbfb3319a jobs: remove .exit callback
Now that all of the jobs use the component finalization callbacks,
there's no use for the heavy-hammer .exit callback anymore.

job_exit becomes a glorified type shim so that we can call
job_completed from aio_bh_schedule_oneshot.

Move these three functions down into job.c to eliminate a
forward reference.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180906130225.5118-12-jsnow@redhat.com
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:31:15 +02:00
John Snow
cf6320df58 block/stream: add block job creation flags
Add support for taking and passing forward job creation flags.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 20180906130225.5118-4-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:31:15 +02:00
John Snow
a1999b3348 block/mirror: add block job creation flags
Add support for taking and passing forward job creation flags.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 20180906130225.5118-3-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:31:15 +02:00
John Snow
5360782d08 block/commit: add block job creation flags
Add support for taking and passing forward job creation flags.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 20180906130225.5118-2-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-09-25 15:31:15 +02:00
Joel Stanley
673b2d42a8 arm: Add Nordic Semiconductor nRF51 SoC
The nRF51 is a Cortex-M0 microcontroller with an on-board radio module,
plus other common ARM SoC peripherals.

 http://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.pdf

This defines a basic model of the CPU and memory, with no peripherals
implemented at this stage.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Message-id: 20180831220920.27113-3-joel@jms.id.au
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: wrapped a few long lines]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 14:14:07 +01:00
Peter Maydell
506e4a00de ppc patch queue 2018-09-25
Here are the accumulated ppc target patches for the last several
 weeks. Highlights are:
    * A number of 40p / PReP cleanups
    * Preliminary irq rework on the pseries machine towards the new
      XIVE interrupt controller
 
 There are a few patches which make small changes to generic device and
 arm code as prerequisites to the 40p interrupt routing cleanup.  They
 have acks from the relevant maintainers.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-3.1-20180925' into staging

ppc patch queue 2018-09-25

Here are the accumulated ppc target patches for the last several
weeks. Highlights are:
   * A number of 40p / PReP cleanups
   * Preliminary irq rework on the pseries machine towards the new
     XIVE interrupt controller

There are a few patches which make small changes to generic device and
arm code as prerequisites to the 40p interrupt routing cleanup.  They
have acks from the relevant maintainers.

# gpg: Signature made Tue 25 Sep 2018 08:00:06 BST
# gpg:                using RSA key 6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-3.1-20180925:
  40p: add fixed IRQ routing for LSI SCSI device
  lsi53c895a: add optional external IRQ via qdev
  scsi: remove unused lsi53c895a_create() and lsi53c810_create() functions
  scsi: move lsi53c8xx_create() callers to lsi53c8xx_handle_legacy_cmdline()
  scsi: add lsi53c8xx_handle_legacy_cmdline() function
  sm501: Adjust endianness of pixel value in rectangle fill
  spapr_pci: add an extra 'nr_msis' argument to spapr_populate_pci_dt
  spapr: increase the size of the IRQ number space
  spapr: introduce a spapr_irq class 'nr_msis' attribute
  40p: use OR gate to wire up raven PCI interrupts
  raven: some minor IRQ-related tidy-ups
  hw/ppc: on 40p machine, change default firmware to OpenBIOS
  target/ppc/cpu-models: Re-group the 970 CPUs together again
  Record history of ppcemb target in common.json

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 13:30:45 +01:00
Peter Maydell
2f831d0498 Error reporting & miscellaneous patches for 2018-09-24
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Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2018-09-24' into staging

Error reporting & miscellaneous patches for 2018-09-24

# gpg: Signature made Mon 24 Sep 2018 16:16:50 BST
# gpg:                using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-error-2018-09-24:
  MAINTAINERS: Fix F: patterns that don't match anything
  Drop "qemu:" prefix from error_report() arguments
  qemu-error: make use of {error, warn}_report_once_cond
  qemu-error: add {error, warn}_report_once_cond

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-09-25 11:37:39 +01:00
Mark Cave-Ayland
e090a054a7 scsi: remove unused lsi53c895a_create() and lsi53c810_create() functions
Now that these functions are no longer required they can be removed.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-09-25 11:12:25 +10:00
Mark Cave-Ayland
f74a4f3a59 scsi: add lsi53c8xx_handle_legacy_cmdline() function
This is the function that will soon be used to replace lsi53c895a_create() and
lsi53c810_create().

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-09-25 11:12:25 +10:00
Cédric Le Goater
0976efd51b spapr_pci: add an extra 'nr_msis' argument to spapr_populate_pci_dt
So that we don't have to call qdev_get_machine() to get the machine
class and the sPAPRIrq backend holding the number of MSIs.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-09-25 11:12:25 +10:00