Actively redefining 'inline' is wrong for C++, where gcc has an
extension 'inline namespace' which fails to compile if the
keyword 'inline' is replaced by a macro expansion. This will
matter once we start to include "qemu/osdep.h" first from C++
files, depending also on whether the system headers are new
enough to be using the gcc extension.
But rather than just guard things by __cplusplus, let's look at
the overall picture. Commit df2542c737 in 2007 defined 'inline'
to the gcc attribute __always_inline__, with the rationale "To
avoid discarded inlining bug". But compilers have improved since
then, and we are probably better off trusting the compiler rather
than trying to force its hand.
So just nuke our craziness.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1455043788-28112-1-git-send-email-eblake@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* Coverity fixes for IPMI (Corey), i386 (Paolo), qemu-char (Paolo)
* at long last, fail on wrong .pc files if -m32 is in use (Daniel)
* qemu-char regression fix (Daniel)
* SAS1068 device (Paolo)
* memory region docs improvements (Peter)
* target-i386 cleanups (Richard)
* qemu-nbd docs improvements (Sitsofe)
* thread-safe memory hotplug (Stefan)
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
* switch to C11 atomics (Alex)
* Coverity fixes for IPMI (Corey), i386 (Paolo), qemu-char (Paolo)
* at long last, fail on wrong .pc files if -m32 is in use (Daniel)
* qemu-char regression fix (Daniel)
* SAS1068 device (Paolo)
* memory region docs improvements (Peter)
* target-i386 cleanups (Richard)
* qemu-nbd docs improvements (Sitsofe)
* thread-safe memory hotplug (Stefan)
# gpg: Signature made Tue 09 Feb 2016 16:09:30 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>"
* remotes/bonzini/tags/for-upstream: (33 commits)
qemu-char, io: fix ordering of arguments for UDP socket creation
MAINTAINERS: add all-match entry for qemu-devel@
get_maintainer.pl: fall back to git if only lists are found
target-i386: fix PSE36 mode
docs/memory.txt: Improve list of different memory regions
ipmi_bmc_sim: Add break to correct watchdog NMI check
ipmi_bmc_sim: Fix off by one in check.
ipmi: do not take/drop iothread lock
target-i386: Deconstruct the cpu_T array
target-i386: Tidy gen_add_A0_im
target-i386: Rewrite leave
target-i386: Rewrite gen_enter inline
target-i386: Use gen_lea_v_seg in pusha/popa
target-i386: Access segs via TCG registers
target-i386: Use gen_lea_v_seg in stack subroutines
target-i386: Use gen_lea_v_seg in gen_lea_modrm
target-i386: Introduce mo_stacksize
target-i386: Create gen_lea_v_seg
char: fix repeated registration of tcp chardev I/O handlers
kvm-all: trace: strerror fixup
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
memcpy can take a large amount of time for small reads and writes.
For virtio it is a common case that the first iovec can satisfy the
whole read or write. In that case, and if bytes is a constant to
avoid excessive growth of code, inline the first iteration
into the caller.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1450782213-14227-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Merge remote-tracking branch 'remotes/jnsnow/tags/ide-pull-request' into staging
# gpg: Signature made Wed 03 Feb 2016 20:29:54 GMT using RSA key ID AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>"
* remotes/jnsnow/tags/ide-pull-request:
dma: remove now useless DMA_* functions
sb16: use IsaDma interface instead of global DMA_* functions
gus: use IsaDma interface instead of global DMA_* functions
cs4231a: use IsaDma interface instead of global DMA_* functions
fdc: use IsaDma interface instead of global DMA_* functions
sparc64: disable floppy DMA
sparc: disable floppy DMA
magnum: disable floppy DMA for now
i8257: implement the IsaDma interface
isa: add an ISA DMA interface, and store it within the ISA bus
i8257: move state definition to new independent header
i8257: QOM'ify
i8257: add missing const
i8257: make the DMA running method per controller
i8257: rename functions to start with i8257_ prefix
i8257: rename struct dma_regs to I8257Regs
i8257: rename struct dma_cont to I8257State
i8257: pass ISA bus to DMA_init() function
i82374: device only existed as ISA device, so simplify device
fdc: fix detection under Linux
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This will permit to deprecate global DMA_*() functions.
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Message-id: 1453843944-26833-11-git-send-email-hpoussin@reactos.org
Signed-off-by: John Snow <jsnow@redhat.com>
Split the bits that require it to exec/log.h.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1452174932-28657-8-git-send-email-den@openvz.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
Block layer patches
# gpg: Signature made Wed 20 Jan 2016 15:37:57 GMT using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
* remotes/kevin/tags/for-upstream:
iotests: Test that throttle values ranges
blockdev: Error out on negative throttling option values
vmdk: Create streamOptimized as version 3
qcow2: Make image inaccessible after failed qcow2_invalidate_cache()
qcow2: Fix BDRV_O_INACTIVE handling in qcow2_invalidate_cache()
qcow2: Implement .bdrv_inactivate
block: Inactivate BDS when migration completes
block: Rename BDRV_O_INCOMING to BDRV_O_INACTIVE
block: Fix error path in bdrv_invalidate_cache()
block: Assert no write requests under BDRV_O_INCOMING
qcow2: Write full header on image creation
qcow2: Write feature table only for v3 images
block: Clean up includes
qemu-iotests: Reduce racy output in 028
qemu-img: Speed up comparing empty/zero images
block/raw-posix: avoid bogus fixup for cylinders on DASD disks
block: Fix .bdrv_open flags
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
extract_common_blockdev_options() uses qemu_opt_get_number() to parse
the bps/iops numbers to uint64_t, then converts to double and stores in
ThrottleConfig. The actual parsing is done by strtoull() in
parse_option_number(). Negative numbers are wrapped to large positive
ones, and stored.
We used to reject negative numbers since 7d81c1413c, but this regressed
when the option parsing code was changed later. Now fix this again.
This time, define an arbitrary large upper limit (1e15), and check the
values so both negative and impractically big numbers are caught and
reported.
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The socket_dgram method accepts a QAPI SocketAddress object
which it then turns into QemuOpts before calling the
inet_dgram_opts helper method. By converting the latter to
use QAPI SocketAddress directly, the QemuOpts conversion
step can be eliminated.
This removes the very last use of QemuOpts from the
sockets code, so the socket_optslist[] array is also
removed.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1452518225-11751-5-git-send-email-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
There are no callers of the sockets methods which accept
QemuOpts any more. Make all the QemuOpts related functions
static to avoid new callers being added, in preparation
for removal of all QemuOpts usage, in favour of QAPI
SocketAddress.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1452518225-11751-2-git-send-email-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The qemu-char.c contains two helper methods send_all
and recv_all. These are in fact declared in sockets.h
so ought to have been in util/qemu-sockets.c. For added
fun the impl of recv_all is completely missing on Win32.
Fortunately there is only a single caller of these
methods, the TPM passthrough code, which is only
ever compiled on Linux. With only a single caller
these helpers are not compelling enough to keep so
inline them in the TPM code, avoiding the need to
fix the missing recv_all on Win32.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1450879144-17111-1-git-send-email-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1450452927-8346-25-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Our use of glib is now pervasive across QEMU. Move the include of glib-compat.h
from qemu-common.h to osdep.h so that it is more widely accessible and doesn't
get forgotten by accident. (Failure to include it will result in build failure
on old versions of glib which is likely to be unnoticed by most developers.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
The standard glib provided g_base64_decode doesn't provide any
kind of sensible error checking on its input. Add a QEMU custom
wrapper qbase64_decode which can be used with untrustworthy
input that can contain invalid base64 characters, embedded
NUL characters, or not be NUL terminated at all.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Implement a QIOChannel subclass that supports sockets I/O.
The implementation is able to manage a single socket file
descriptor, whether a TCP/UNIX listener, TCP/UNIX connection,
or a UDP datagram. It provides APIs which can listen and
connect either asynchronously or synchronously. Since there
is no asynchronous DNS lookup API available, it uses the
QIOTask helper for spawning a background thread to ensure
non-blocking operation.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
rcu_read_lock cannot change rcu_gp_ongoing from true to false
(the previous value of p_rcu_reader->ctr is zero), hence
there is no need to check p_rcu_reader->waiting and wake up
a concurrent synchronize_rcu.
While at it mark the wakeup as unlikely in rcu_read_unlock.
Reviewed-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1450265542-4323-1-git-send-email-pbonzini@redhat.com>
In some cases, the same message is printed both on stderr and in the log.
Avoid duplicate output in the default case where stderr _is_ the log,
and standardize this to stderr+log where it used to use stdio+log.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
What's more meta than using qapi to define qapi? :)
Convert QType into a full-fledged[*] builtin qapi enum type, so
that a subsequent patch can then use it as the discriminator
type of qapi alternate types. Fortunately, the judicious use of
'prefix' in the qapi definition avoids churn to the spelling of
the enum constants.
To avoid circular definitions, we have to flip the order of
inclusion between "qobject.h" vs. "qapi-types.h". Back in commit
28770e0, we had the latter include the former, so that we could
use 'QObject *' for our implementation of 'any'. But that usage
also works with only a forward declaration, whereas the
definition of QObject requires QType to be a complete type.
[*] The type has to be builtin, rather than declared in
qapi/common.json, because we want to use it for alternates even
when common.json is not included. But since it is the first
builtin enum type, we have to add special cases to qapi-types
and qapi-visit to only emit definitions once, even when two
qapi files are being compiled into the same binary (the way we
already handled builtin list types like 'intList'). We may
need to revisit how multiple qapi files share common types,
but that's a project for another day.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1449033659-25497-4-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
"Please keep this list in alphabetical order" has been more honoured
in the breach than in the observance. Clean up.
While there, drop a redundant struct declaration.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Since commit 8561c9244d "exec: allocate PROT_NONE pages on top of
RAM", it is no longer possible to back guest RAM with hugepages on ppc64
hosts:
mmap(NULL, 285212672, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x3fff57000000
mmap(0x3fff57000000, 268435456, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 19, 0) = -1 EBUSY (Device or resource busy)
This is because on ppc64, Linux fixes a page size for a virtual address
at mmap time, so we can't switch a range of memory from anonymous
small pages to hugetlbs with MAP_FIXED.
See commit d0f13e3c20b6fb73ccb467bdca97fa7cf5a574cd
("[POWERPC] Introduce address space "slices"") in Linux
history for the details.
Detect this and create the PROT_NONE mapping using the same fd.
Naturally, this makes the guard page bigger with hugetlbfs.
Based on patch by Greg Kurz.
Acked-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
There are two issues with qemu_hw_version() today:
1) If a machine has hw_version set, the value returned by it is
not very useful, because it is not the actual QEMU version.
2) If a machine does't set hw_version, the return value of
qemu_hw_version() is broken, because it will change when
upgrading QEMU.
For those reasons, using qemu_hw_version() is strongly
discouraged, and should be used only in code that used
QEMU_VERSION in the past and needs to keep compatibility.
To fix (2), instead of making every machine broken by default
unless they set hw_version, make qemu_hw_version() simply return
"2.5+" if qemu_set_hw_version() is not called.
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch adds two new fields to BlockDeviceTimedStats that track the
average number of pending read and write requests for a block device.
The values are calculated for the period of time defined for that
interval.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: fd31fef53e2714f2f30d59ed58ca2f67ec9ab926.1446044837.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This module computes the average of a set of values within a time
window, keeping also track of the minimum and maximum values.
In order to produce more accurate results it works internally by
creating two time windows of the same period, offsetted by half of
that period. Values are accounted on both windows and the data is
always returned from the oldest one.
[Add missing util/replay.o to test-timed-average dependencies to fix the
build.
--Stefan]
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: 201b09c21bbc9c329779d2b2365ee2b9c80dceeb.1446044837.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Soon we'll be in either ACTIVE or POSTCOPY_ACTIVE when we
complete migration, and we need to know which we expect to be
in to change state safely.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Suspend to file is very much like a migrate, and it makes life
easier if we have the Migration state available, so initialise it
in the savevm.c code for suspending.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewd-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Add QEMU_MADV_NOHUGEPAGE as an OS-independent version of
MADV_NOHUGEPAGE.
We include sys/mman.h before making the test to ensure
that we pick up the system defines.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Postcopy sends RAMBlock names and offsets over the wire (since it can't
rely on the order of ramaddr being the same), and it starts out with
HVA fault addresses from the kernel.
qemu_ram_block_from_host translates a HVA into a RAMBlock, an offset
in the RAMBlock and the global ram_addr_t value.
Rewrite qemu_ram_addr_from_host to use qemu_ram_block_from_host.
Provide qemu_ram_get_idstr since its the actual name text sent on the
wire.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Add a Sysbus AHCI subclass for the Allwinner AHCI. It has a few extra
vendor specific registers which are used for phy and power init.
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 833b5b05ed5ade38bf69656679b0a7575e79492b.1445917756.git.crosthwaite.peter@gmail.com
[resolved patch context on pull --js]
Signed-off-by: John Snow <jsnow@redhat.com>
the idea behind this patch is to allow the buffer to shrink, but
make this a seldom operation. The buffers average size is measured
exponentionally smoothed with am alpha of 1/128.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-20-git-send-email-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-6-git-send-email-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-5-git-send-email-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-3-git-send-email-kraxel@redhat.com
This makes the purpose of the function clearer: it is not about the
version of QEMU that's running, but the version string exposed in the
emulated hardware.
Cc: Andrzej Zaborowski <balrogg@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: John Snow <jsnow@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1446233769-7892-3-git-send-email-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Merge remote-tracking branch 'remotes/elmarco/tags/ivshmem-pull-request' into staging
ivshmem series
# gpg: Signature made Mon 26 Oct 2015 09:27:46 GMT using RSA key ID 75969CE5
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>"
# gpg: aka "Marc-André Lureau <marcandre.lureau@gmail.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276 F62D DAE8 E109 7596 9CE5
* remotes/elmarco/tags/ivshmem-pull-request: (51 commits)
doc: document ivshmem & hugepages
ivshmem: use little-endian int64_t for the protocol
ivshmem: use kvm irqfd for msi notifications
ivshmem: rename MSI eventfd_table
ivshmem: remove EventfdEntry.vector
ivshmem: add hostmem backend
ivshmem: use qemu_strtosz()
ivshmem: do not keep shm_fd open
tests: add ivshmem qtest
qtest: add qtest_add_abrt_handler()
msix: implement pba write (but read-only)
contrib: remove unnecessary strdup()
ivshmem: add check on protocol version in QEMU
docs: update ivshmem device spec
ivshmem-server: fix hugetlbfs support
ivshmem-server: use a uint16 for client ID
ivshmem-client: check the number of vectors
contrib: add ivshmem client and server
util: const event_notifier_get_fd() argument
ivshmem: reset mask on device reset
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This structure will store some of the state of the root BDS if the BDS
tree is removed, so that state can be restored once a new BDS tree is
inserted.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
New features:
VT-d support for devices behind a bridge
vhost-user migration support
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
vhost, pc, virtio features, fixes, cleanups
New features:
VT-d support for devices behind a bridge
vhost-user migration support
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Thu 22 Oct 2015 12:39:19 BST using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>"
* remotes/mst/tags/for_upstream: (37 commits)
hw/isa/lpc_ich9: inject the SMI on the VCPU that is writing to APM_CNT
i386: keep cpu_model field in MachineState uptodate
vhost: set the correct queue index in case of migration with multiqueue
piix: fix resource leak reported by Coverity
seccomp: add memfd_create to whitelist
vhost-user-test: check ownership during migration
vhost-user-test: add live-migration test
vhost-user-test: learn to tweak various qemu arguments
vhost-user-test: wrap server in TestServer struct
vhost-user-test: remove useless static check
vhost-user-test: move wait_for_fds() out
vhost: add migration block if memfd failed
vhost-user: use an enum helper for features mask
vhost user: add rarp sending after live migration for legacy guest
vhost user: add support of live migration
net: add trace_vhost_user_event
vhost-user: document migration log
vhost: use a function for each call
vhost-user: add a migration blocker
vhost-user: send log shm fd along with log_base
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
Add qemu_memfd_alloc/free() helpers.
The function helps to allocate and seal shared memory.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
Implement memfd_create() fallback if not available in system libc.
memfd_create() is still not included in glibc today, atlhough it's been
available since Linux 3.17 in Oct 2014.
memfd has numerous advantages over traditional shm/mmap for ipc memory
sharing with fd handler, which we are going to make use of for
vhost-user logging memory in following patches.
The next patches are going to introduce helpers to use best practices of
memfd usage and provide some compatibility fallback. memfd.c is thus
temporarily useless and eventually empty if memfd_create() is provided
by the system.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
Anonymous and file-backed RAM allocation are now almost exactly the same.
Reduce code duplication by moving RAM mmap code out of oslib-posix.c and
exec.c.
Reported-by: Marc-André Lureau <mlureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
The Buffer code in the VNC server is useful for the IO channel
code, so pull it out into a shared module, QIOBuffer.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The coroutine files are currently referenced by the block-obj-y
variable. The coroutine functionality though is already used by
more than just the block code. eg migration code uses coroutine
yield. In the future the I/O channel code will also use the
coroutine yield functionality. Since the coroutine code is nicely
self-contained it can be easily built as part of the libqemuutil.a
library, making it widely available.
The headers are also moved into include/qemu, instead of the
include/block directory, since they are now part of the util
codebase, and the impl was never in the block/ directory
either.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
