Since commit d1807a4f83 ./configure tries
to test files and directories with "test -f", which only test for regular
files. Test with "test -e", which looks for any kind of files.
This unbreak the configure script when not using a separate object
directory.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
These are not in any release, so I am just renaming them.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This will help getting config.guess and config.sub from the srcdir.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Not necessary since we use mkdir -p and from this patch test -f.
Also, dirname returns "." if a path has no directory component,
as is the case for "sh configure".
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
"ln -sf" does not really do anything more than "ln -s" on Solaris.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This also allows overriding it with SDL_CONFIG, and warning in suspicious
cross-compilation scenarios.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This can still be requested with PKG_CONFIG=/path/to/pkg-config.
Just do not use it as a default, and print a warning.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Do not hardcode the list of 64-bit CPUs. Use sizeof(void *) to
compute it. Renaming it to HOST_LONG_BITS to HOST_POINTER_BITS
is left for later.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Non-existent -I paths are dropped silently by the compiler, but still
it is not polite to pass bogus options. Configure-time tests do not
need any include files from the source path, so only include -I flags
at make time (when they're properly expanded).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The "test the C compiler works ok" comes before a bunch of flags
are added for --cpu or just depending on the host. It helps
debugging if the test is done after these flags are (unconditionally)
added.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
I didn't test with sparse, but the old code using += before a variable
was set was wrong. Sparse support should probably be ripped out or
redone, but this at least keeps some sanity.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
According to RFC 1350 (TFTP Revision 2) the mode field can contain any
combination of upper and lower case; also RFC 2349 propagates that the
transfer size option ("tsize") is case in-sensitive too.
Current implementation of embedded TFTP server missed that what does
mess some TFTP clients. Fixed by using STRCASECMP(3) in the required
places.
Signed-off-by: Sergei Gavrikov <sergei.gavrikov@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
Fix a buffer overflow, reported by cppcheck:
[/src/qemu/hw/ppc405_uc.c:72]: (error) Buffer access out-of-bounds: bd.bi_s_version
The use of field bi_s_version seems to be a typo, it should be
bi_r_version.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Fix a buffer overflow, reported by cppcheck:
[/src/qemu/hw/lan9118.c:849]: (error) Buffer access out-of-bounds: s.eeprom
All eeprom handling code assumes that the size of eeprom is 128,
except lan9118_eeprom_cmd. Fix this by restricting the address passed.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Fix a file descriptor leak, reported by cppcheck:
[/src/qemu/block/vvfat.c:759]: (error) Resource leak: dir
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The current default of 16 buffers for the control vq is too small. We
can get more entries in there, for example when asking the guest to add
max. allowed ports.
Note: a more robust solution would involve some kind of event queueing
in host to guarantee no event loss. Added a TODO to look into
this later.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Refactor the volume mixing, so it can be reused for capturing devices.
Additionally, it removes superfluous multiplications with the nominal
volume within the hardware voice code path.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: malc <av1474@comtv.ru>
Following commit 5d48e9174e, it's possible
to remove the hack that used to display the opcodes on ARM hosts only.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Enhance the ARM disassembler used for debugging so that it includes
the hex dump of the opcode as well as the symbolic disassembly.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add a comment about cache coherency and retranslation, so that people
developping new targets based on existing ones are warned of the issue.
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add a configure check for the existence of linux/fiemap.h and the
IOC_FS_FIEMAP ioctl. This fixes a compilation failure on Linux
systems which don't have that header file.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Fix errors in the decoding of ARM VQSHL/VQSHLU immediate forms,
including using the new VQSHLU helper functions where appropriate.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add neon helper functions to implement VQSHLU, which is a
signed-to-unsigned version of VQSHL available only as an
immediate form.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Illegal instructions in a slot delay should generate a slot illegal
instruction exception instead of an illegal instruction exception.
The current PC should be saved before generating such an exception,
but should not be corrected if in a delay slot, given it's already
done in the exception handler do_interrupt().
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
- Don't return status from start/stop functions where it's ignored
- report errors to make debugging easier
- assert on unexpected failures
- don't disable notifiers on error so that we'll
retry when guest driver restarts
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Virtqueue notify is currently handled synchronously in userspace virtio. This
prevents the vcpu from executing guest code while hardware emulation code
handles the notify.
On systems that support KVM, the ioeventfd mechanism can be used to make
virtqueue notify a lightweight exit by deferring hardware emulation to the
iothread and allowing the VM to continue execution. This model is similar to
how vhost receives virtqueue notifies.
The result of this change is improved performance for userspace virtio devices.
Virtio-blk throughput increases especially for multithreaded scenarios and
virtio-net transmit throughput increases substantially.
Some virtio devices are known to have guest drivers which expect a notify to be
processed synchronously and spin waiting for completion.
For virtio-net, this also seems to interact with the guest stack in strange
ways so that TCP throughput for small message sizes (~200bytes)
is harmed. Only enable ioeventfd for virtio-blk for now.
Care must be taken not to interfere with vhost-net, which uses host
notifiers. If the set_host_notifier() API is used by a device
virtio-pci will disable virtio-ioeventfd and let the device deal with
host notifiers as it wishes.
Finally, there used to be a limit of 6 KVM io bus devices inside the
kernel. On such a kernel, don't use ioeventfd for virtqueue host
notification since the limit is reached too easily. This ensures that
existing vhost-net setups (which always use ioeventfd) have ioeventfds
available so they can continue to work.
After migration and on VM change state (running/paused) virtio-ioeventfd
will enable/disable itself.
* VIRTIO_CONFIG_S_DRIVER_OK -> enable virtio-ioeventfd
* !VIRTIO_CONFIG_S_DRIVER_OK -> disable virtio-ioeventfd
* virtio_pci_set_host_notifier() -> disable virtio-ioeventfd
* vm_change_state(running=0) -> disable virtio-ioeventfd
* vm_change_state(running=1) -> enable virtio-ioeventfd
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
There used to be a limit of 6 KVM io bus devices in the kernel.
On such a kernel, we can't use many ioeventfds for host notification
since the limit is reached too easily.
Add an API to test for this condition.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Move tracking vmstate change from virtio-net to virtio.c
as it is going to be used by virito-blk and virtio-pci
for the ioeventfd support.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The VirtIOPCIProxy bugs field is currently used to enable workarounds
for older guests. Rename it to flags so that other per-device behavior
can be tracked.
A later patch uses the flags field to remember whether ioeventfd should
be used for virtqueue host notification.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch tags all vga cards as not hotpluggable. The qemu
standard vga will never ever be hotpluggable. For cirrus + vmware
it might be possible to get that work some day. Todays we can't
handle that for a number of reasons though.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch tags all pci devices which belong to the piix3/4 chipsets as
not hotpluggable (Host bridge, ISA bridge, IDE controller, ACPI bridge).
Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
